@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,900;1,400;1,700&family=Inter:wght@300;400;500;600;700;800;900&family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400&display=swap');

:root {
  --du-crimson:#8B1A1A; --du-crimson-deep:#5c0f0f; --du-gold:#C9A84C;
  --du-gold-light:#f9f0d9; --du-gold-muted:#a07e32; --du-ink:#1a1208;
  --bg-app:#f7f4ee; --bg-card:#fffffe; --bg-surface:#f2ede4; --bg-elevated:#ffffff;
  --text-primary:#1a1510; --text-secondary:#4a4030; --text-muted:#7a6e5e; --text-faint:#b0a28e;
  --border-line:#e0d8c8; --border-strong:#c8bcaa;
  --sub-primary:#1a2a4a; --sub-primary-dark:#0e1b30; --sub-primary-light:#2b4068;
  --sub-accent:#c9a84c; --sub-accent-light:#f9f0d9;
  --sub-gradient:linear-gradient(145deg,#0e1b30 0%,#1a2a4a 60%,#2b4068 100%);
  --sub-bg-tint:#f0f4fa; --sub-border:#c8d4e8; --sub-badge-bg:#e8eef8; --sub-badge-color:#1a2a4a;
  --shadow-xs:0 1px 2px rgba(26,21,16,.06);
  --shadow-sm:0 2px 8px rgba(26,21,16,.08),0 1px 3px rgba(26,21,16,.05);
  --shadow-md:0 6px 20px rgba(26,21,16,.10),0 2px 8px rgba(26,21,16,.06);
  --shadow-lg:0 14px 38px rgba(26,21,16,.13),0 4px 12px rgba(26,21,16,.07);
  --shadow-xl:0 24px 56px rgba(26,21,16,.18),0 8px 20px rgba(26,21,16,.09);
  --font-display:'Playfair Display',Georgia,'Times New Roman',serif;
  --font-body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-serif:'EB Garamond',Georgia,serif;
  --radius-xs:4px; --radius-sm:8px; --radius-md:12px;
  --radius-lg:18px; --radius-xl:24px; --radius-pill:9999px;
  --transition-fast:all .16s cubic-bezier(.4,0,.2,1);
  --transition:all .26s cubic-bezier(.16,1,.3,1);

  /* Liquid Metal Tabs Theme Tokens (colorBack: #3b82f6, colorTint: #93c5fd) */
  --metal-back: #3b82f6;
  --metal-tint: #93c5fd;
  --metal-btn-bg: #ffffff;
  --metal-btn-bg-hover: #f8fafc;
  --metal-icon-bg: #eff6ff;
  --metal-icon-color: #2563eb;
  --metal-text: #0f172a;
  --metal-shadow: rgba(59, 130, 246, 0.28);
  --metal-shadow-hover: rgba(59, 130, 246, 0.52);
}

[data-theme="dark"] {
  --bg-app:#0e0c09; --bg-card:#181410; --bg-surface:#1f1b15; --bg-elevated:#252018;
  --text-primary:#f0ebe0; --text-secondary:#c8bfaf; --text-muted:#8a7e6e; --text-faint:#5a5040;
  --border-line:#2e2820; --border-strong:#3e3628;
  --du-gold-light:#2a2010;
  --shadow-sm:0 2px 8px rgba(0,0,0,.4); --shadow-md:0 6px 20px rgba(0,0,0,.5);
  --shadow-lg:0 14px 38px rgba(0,0,0,.6); --shadow-xl:0 24px 56px rgba(0,0,0,.75);
  --sub-bg-tint:#12161e;

  /* Liquid Metal Dark Mode Tokens */
  --metal-btn-bg: #14110d;
  --metal-btn-bg-hover: #1f1b15;
  --metal-icon-bg: #252018;
  --metal-icon-color: #93c5fd;
  --metal-text: #f0ebe0;
  --metal-shadow: rgba(59, 130, 246, 0.38);
  --metal-shadow-hover: rgba(59, 130, 246, 0.65);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{background-color:var(--bg-app);color:var(--text-primary);font-family:var(--font-body);
  line-height:1.65;min-height:100vh;display:flex;flex-direction:column;
  overflow-x:hidden;padding-bottom:72px;transition:background-color .3s ease,color .3s ease}
@media(min-width:769px){body{padding-bottom:0}}
a{color:var(--sub-primary);text-decoration:none;transition:var(--transition-fast)}
a:hover{color:var(--sub-accent)}
button{font-family:inherit;cursor:pointer}
::selection{background:var(--du-gold);color:var(--du-ink)}

.site-header{position:sticky;top:0;z-index:200;background:rgba(247,244,238,.94);
  border-bottom:1px solid var(--border-line);
  box-shadow:0 1px 0 rgba(201,168,76,.15),var(--shadow-xs);
  backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);
  width:100%;max-width:100%;box-sizing:border-box}
[data-theme="dark"] .site-header{background:rgba(14,12,9,.92)}
.header-inner{max-width:1400px;width:100%;box-sizing:border-box;margin:0 auto;padding:0 24px;height:62px;
  display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand-wrap{display:flex;align-items:center;gap:14px;cursor:pointer;user-select:none}
.brand-crest{width:44px;height:44px;border-radius:var(--radius-sm);
  background:linear-gradient(145deg,var(--du-crimson-deep) 0%,var(--du-crimson) 100%);
  color:var(--du-gold);display:flex;align-items:center;justify-content:center;font-size:20px;
  box-shadow:0 4px 12px rgba(139,26,26,.3),inset 0 1px 0 rgba(255,255,255,.1);
  border:1px solid rgba(201,168,76,.5);flex-shrink:0;transition:var(--transition)}
.brand-wrap:hover .brand-crest{transform:rotate(-3deg) scale(1.05);box-shadow:0 6px 18px rgba(139,26,26,.4)}
.brand-text h1{font-family:var(--font-display);font-size:clamp(1rem,2.5vw,1.12rem);
  font-weight:700;color:var(--text-primary);line-height:1.15;letter-spacing:-.01em}
.brand-text span{color:var(--du-crimson)}
.brand-text p{font-size:.68rem;color:var(--text-muted);letter-spacing:.1em;
  text-transform:uppercase;font-weight:500;margin-top:1px}
.header-actions{display:flex;align-items:center;gap:10px}
.semester-badge-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;
  border-radius:var(--radius-pill);background:var(--bg-elevated);
  border:1.5px solid var(--border-line);color:var(--text-primary);
  font-size:.84rem;font-weight:600;transition:var(--transition);min-height:40px}
.semester-badge-btn:hover{background:var(--du-gold-light);border-color:var(--du-gold)}
.sem-indicator{width:8px;height:8px;border-radius:50%;background:#22c55e;
  box-shadow:0 0 0 2px rgba(34,197,94,.3);animation:pulse-green 2s infinite}
@keyframes pulse-green{0%,100%{box-shadow:0 0 0 2px rgba(34,197,94,.3)}50%{box-shadow:0 0 0 4px rgba(34,197,94,.15)}}
.semester-badge-btn i.arrow-down{font-size:.7rem;color:var(--text-muted)}
.theme-toggle-btn{width:40px;height:40px;border-radius:var(--radius-pill);
  background:var(--bg-elevated);border:1.5px solid var(--border-line);
  color:var(--text-secondary);font-size:1rem;display:flex;align-items:center;
  justify-content:center;transition:var(--transition);flex-shrink:0}
.theme-toggle-btn:hover{background:var(--du-gold-light);border-color:var(--du-gold);
  color:var(--du-gold-muted);transform:rotate(20deg)}

.main-wrapper{max-width:1400px;margin:0 auto;padding:0 24px 80px;width:100%;flex:1}

.semester-view,.subjects-view,.subject-hub-view{display:none}
.semester-view.active,.subjects-view.active,.subject-hub-view.active{display:block}

.semester-view{padding-top:0}
.sem-hero-cinematic{position:relative;min-height:490px;margin:0 -24px;padding:85px 40px 70px;
  display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:#030712}

/* 3D Wave Grid Interactive Background */
.wave-grid-bg-container{
  position:absolute;inset:0;width:100%;height:100%;overflow:hidden;z-index:0;pointer-events:auto}
.wave-grid-bg-container canvas{
  position:absolute;inset:0;width:100%!important;height:100%!important;display:block;pointer-events:auto}
.wave-grid-vignette{
  position:absolute;inset:0;pointer-events:none;z-index:1;
  background:radial-gradient(circle at 50% 45%,rgba(6,11,25,.35) 0%,rgba(3,7,18,.75) 70%,rgba(2,4,10,.92) 100%)}

/* Interactive GPU Particles Stage for "Make Law Easy." */
.hero-particle-text-stage{
  position: relative;
  width: 100%;
  max-width: 980px;
  min-height: clamp(160px, 22vw, 240px);
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  cursor: default;
  z-index: 3;
}
.hero-particle-text-stage .interactive-particles-canvas{
  position: absolute;
  inset: 0;
  width: 100%!important;
  height: 100%!important;
  display: block;
  pointer-events: auto;
  z-index: 2;
}
.hero-particle-fallback{
  width: 100%;
  transition: opacity .3s ease;
}
.hero-particle-text-stage.particles-active .hero-particle-fallback{
  opacity: 0;
  pointer-events: none;
  position: absolute;
  visibility: hidden;
}

.sem-hero-content{position:relative;z-index:2;text-align:center;max-width:960px;pointer-events:none}
.sem-hero-badge{display:inline-flex;align-items:center;gap:9px;padding:7px 22px;
  border-radius:9999px;background:rgba(201,168,76,.12);
  border:1px solid rgba(201,168,76,.5);color:#e5b869;font-size:.76rem;
  font-weight:700;letter-spacing:.18em;text-transform:uppercase;margin-bottom:24px;
  box-shadow:0 0 24px rgba(201,168,76,.15);pointer-events:auto}
.sem-hero-content h2{font-family:'Playfair Display','Cinzel',Georgia,serif;
  font-size:clamp(2.5rem,5.8vw,4.4rem);font-weight:700;color:#fff;line-height:1.15;
  margin-bottom:18px;letter-spacing:-.02em;text-shadow:0 4px 20px rgba(0,0,0,.6)}
.sem-hero-content h2 em{font-family:'Playfair Display','Cinzel',Georgia,serif;
  font-style:italic;color:#e5b869;
  background:linear-gradient(135deg,#fcedc7 0%,#e5b869 50%,#c59b27 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;display:inline-block;font-weight:600}
.sem-hero-content>p{font-size:clamp(.92rem,2.8vw,1.12rem);color:rgba(245,235,224,.88);
  max-width:640px;width:100%;margin:0 auto;line-height:1.65;font-family:'Merriweather',Georgia,serif;
  text-shadow:0 2px 8px rgba(0,0,0,.4);padding:0 8px}
.sem-hero-ornament{display:flex;align-items:center;justify-content:center;gap:16px;
  margin-top:28px;color:rgba(229,184,105,.68);font-size:.74rem;letter-spacing:.24em;
  text-transform:uppercase;font-weight:600}
.sem-hero-ornament::before,.sem-hero-ornament::after{content:'—';color:rgba(229,184,105,.4)}

.sem-hero-actions{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;
  gap:14px;margin-top:32px;position:relative;z-index:5;pointer-events:auto;max-width:100%}
.hero-btn-primary{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  border-radius:9999px;border:none;background:transparent;padding:3.5px;
  cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 8px 28px -4px rgba(37,99,235,.38),0 2px 6px rgba(0,0,0,.04);
}
.hero-btn-primary:active{transform:scale(.98)}
.hero-btn-primary::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:3.5px;
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:filter .3s ease;
}
.hero-btn-primary:hover::before{animation-duration:2s;filter:drop-shadow(0 0 10px rgba(147,197,253,.95)) brightness(1.25)}
.hero-btn-primary:hover{box-shadow:0 12px 36px -4px rgba(37,99,235,.48),0 0 20px rgba(59,130,246,.35);transform:translateY(-2px)}
.hero-btn-primary::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 70px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.55),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.hero-btn-primary:hover::after{opacity:1}
.hero-btn-primary .metal-inner-body{
  position:relative;z-index:1;display:flex;align-items:center;gap:12px;
  padding:7px 24px 7px 7px;border-radius:9999px;background:#ffffff;transition:background .2s ease;
}
[data-theme="dark"] .hero-btn-primary .metal-inner-body{background:#0b0d13}
.hero-btn-primary:hover .metal-inner-body{background:#f8fafc}
[data-theme="dark"] .hero-btn-primary:hover .metal-inner-body{background:#161922}
.hero-btn-primary .metal-icon-circle{
  width:38px;height:38px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:#eff6ff;box-shadow:inset 0 2px 4px rgba(0,0,0,.08);flex-shrink:0;transition:transform .22s cubic-bezier(.16,1,.3,1);
}
[data-theme="dark"] .hero-btn-primary .metal-icon-circle{background:rgba(59,130,246,.22);box-shadow:inset 0 2px 4px rgba(0,0,0,.25)}
.hero-btn-primary:hover .metal-icon-circle{transform:scale(1.1)}
.hero-btn-primary .metal-icon-circle i{font-size:1rem;color:#2563eb}
[data-theme="dark"] .hero-btn-primary .metal-icon-circle i{color:#60a5fa}
.hero-btn-primary .metal-btn-lbl{
  font-family:'Inter',sans-serif;font-size:1rem;font-weight:800;letter-spacing:-.01em;color:#0f172a;white-space:nowrap;
}
[data-theme="dark"] .hero-btn-primary .metal-btn-lbl{color:#ffffff}
.hero-btn-secondary{display:inline-flex;align-items:center;gap:9px;padding:12px 22px;
  border-radius:9999px;background:rgba(255,255,255,.06);color:#f5ebd6;
  font-size:.85rem;font-weight:700;border:1px solid rgba(229,184,105,.3);
  backdrop-filter:blur(10px);cursor:pointer;transition:all .25s cubic-bezier(.16,1,.3,1)}
.hero-btn-secondary:hover{background:rgba(229,184,105,.15);border-color:#e5b869;
  color:#fff;transform:translateY(-2px)}
.sem-selection-section{padding:48px 0 32px}
.sem-section-label{display:flex;align-items:center;gap:14px;margin-bottom:28px;
  font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--text-muted)}
.sem-section-label::after{content:'';flex:1;height:1px;background:var(--border-line)}
.semester-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr));gap:20px}
.sem-card{background:var(--bg-card);border:1.5px solid var(--border-line);
  border-radius:var(--radius-lg);overflow:hidden;position:relative;
  transition:var(--transition);display:flex;flex-direction:column}
.sem-card.active-sem{border-color:rgba(139,26,26,.3);cursor:pointer;box-shadow:var(--shadow-sm)}
.sem-card.active-sem:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--du-gold)}
.sem-card.coming-soon{opacity:1;background:var(--bg-card);border:1.5px dashed var(--border-strong)}
[data-theme="dark"] .sem-card.coming-soon{background:#161310;border-color:#3f372c}
.sem-card-strip{height:6px;background:linear-gradient(90deg,var(--du-crimson),var(--du-gold))}
.sem-card.coming-soon .sem-card-strip{background:linear-gradient(90deg,#94a3b8,#cbd5e1)}
[data-theme="dark"] .sem-card.coming-soon .sem-card-strip{background:linear-gradient(90deg,#475569,#334155)}
.sem-card-inner{padding:22px 22px 20px;display:flex;flex-direction:column;justify-content:space-between;flex:1;gap:18px;min-height:220px}
.sem-card-top{display:flex;align-items:flex-start;justify-content:space-between}
.sem-roman{font-family:var(--font-display);font-size:2.8rem;font-weight:900;
  color:var(--du-crimson);line-height:1}
[data-theme="dark"] .sem-card.active-sem .sem-roman{color:#ef4444}
.sem-card.coming-soon .sem-roman{color:#64748b}
[data-theme="dark"] .sem-card.coming-soon .sem-roman{color:#94a3b8}

.sem-status-badge{padding:5px 12px;border-radius:var(--radius-pill);
  font-size:.72rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:6px}
.badge-active{background:#ecfdf5;color:#047857;border:1.5px solid #86efac}
[data-theme="dark"] .badge-active{background:rgba(6,78,59,.45);color:#34d399;border:1.5px solid rgba(52,211,153,.5)}
.badge-upcoming{background:#f1f5f9;color:#334155;border:1.5px solid #cbd5e1}
[data-theme="dark"] .badge-upcoming{background:#221e19;color:#cbd5e1;border:1.5px solid #4a4030}

.sem-card-body{display:flex;flex-direction:column;gap:6px;flex:1}
.sem-card h3{font-family:var(--font-display);font-size:1.44rem;font-weight:800;
  color:#0f172a;margin:0;line-height:1.2;letter-spacing:-.01em}
[data-theme="dark"] .sem-card h3{color:#f8fafc}
.sem-card .sem-term{font-size:.82rem;color:#92400e;font-weight:700;
  letter-spacing:.05em;text-transform:uppercase;margin:0;display:inline-flex;align-items:center;gap:6px}
.sem-card .sem-term i{font-size:.82rem;color:#b45309}
[data-theme="dark"] .sem-card .sem-term{color:#fbbf24}
[data-theme="dark"] .sem-card .sem-term i{color:#f59e0b}

.sem-subject-count-pill{display:inline-flex;align-items:center;gap:8px;margin-top:6px;
  font-size:.86rem;font-weight:700;padding:6px 14px;border-radius:9999px;width:fit-content;letter-spacing:-.01em}
.sem-card.active-sem .sem-subject-count-pill{background:#ecfdf5;color:#065f46;border:1.5px solid #6ee7b7}
.sem-card.active-sem .sem-subject-count-pill i{color:#059669;font-size:.86rem}
[data-theme="dark"] .sem-card.active-sem .sem-subject-count-pill{background:rgba(16,185,129,.18);color:#6ee7b7;border:1.5px solid rgba(52,211,153,.45)}
[data-theme="dark"] .sem-card.active-sem .sem-subject-count-pill i{color:#34d399}

.sem-card.coming-soon .sem-subject-count-pill{background:#f8fafc;color:#1e293b;border:1.5px solid #cbd5e1}
.sem-card.coming-soon .sem-subject-count-pill i{color:#475569;font-size:.86rem}
[data-theme="dark"] .sem-card.coming-soon .sem-subject-count-pill{background:#231f1a;color:#e2e8f0;border:1.5px solid #4a4030}
[data-theme="dark"] .sem-card.coming-soon .sem-subject-count-pill i{color:#94a3b8}

/* VengeanceUI Liquid Metal Button for Semester Cards */
.sem-liquid-metal-btn{
  position:relative;width:100%;border-radius:9999px;border:none;background:transparent;
  padding:3px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 8px 24px -4px rgba(0,0,0,.14),0 2px 6px rgba(0,0,0,.04);
}
.sem-liquid-metal-btn:active{transform:scale(.98)}

/* Flowing Liquid Metal Outer Border (colorBack: #3b82f6, colorTint: #93c5fd) */
.sem-liquid-metal-btn::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:3px;
  background:linear-gradient(
    115deg,
    #1d4ed8 0%,
    #2563eb 15%,
    #3b82f6 30%,
    #93c5fd 46%,
    #ffffff 54%,
    #93c5fd 64%,
    #3b82f6 80%,
    #1d4ed8 100%
  );
  background-size:260% 260%;
  animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  pointer-events:none;z-index:2;transition:filter .3s ease;
}
.sem-liquid-metal-btn:hover::before,
.sem-card.active-sem:hover .sem-liquid-metal-btn::before{
  animation-duration:2s;
  filter:drop-shadow(0 0 8px rgba(147,197,253,.95)) brightness(1.2);
}
.sem-liquid-metal-btn:hover,
.sem-card.active-sem:hover .sem-liquid-metal-btn{
  box-shadow:0 12px 30px -4px rgba(37,99,235,.35),0 0 16px rgba(59,130,246,.3);
  transform:translateY(-1px);
}

/* Dynamic Glossy Specular Sheen Tracking Cursor */
.sem-liquid-metal-btn::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 60px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.45),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.sem-liquid-metal-btn:hover::after,
.sem-card.active-sem:hover .sem-liquid-metal-btn::after{opacity:1}

/* Inner Button Body */
.sem-liquid-metal-btn .metal-inner-body{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:flex-start;
  gap:12px;padding:6px 18px 6px 6px;border-radius:9999px;
  background:var(--metal-btn-bg,#ffffff);transition:background .2s ease;
  width:100%;box-sizing:border-box;
}
[data-theme="dark"] .sem-liquid-metal-btn .metal-inner-body{background:#0e1117}
.sem-liquid-metal-btn:hover .metal-inner-body,
.sem-card.active-sem:hover .sem-liquid-metal-btn .metal-inner-body{background:var(--metal-btn-bg-hover,#f8fafc)}
[data-theme="dark"] .sem-liquid-metal-btn:hover .metal-inner-body,
[data-theme="dark"] .sem-card.active-sem:hover .sem-liquid-metal-btn .metal-inner-body{background:#181c24}

/* Inset Circular Icon */
.sem-liquid-metal-btn .metal-icon-circle{
  width:36px;height:36px;border-radius:50%;display:inline-flex;align-items:center;
  justify-content:center;background:var(--metal-icon-bg,#eff6ff);
  box-shadow:inset 0 2px 4px rgba(0,0,0,.08);flex-shrink:0;
  transition:transform .22s cubic-bezier(.16,1,.3,1),background .2s ease;
}
[data-theme="dark"] .sem-liquid-metal-btn .metal-icon-circle{
  background:rgba(59,130,246,.25);box-shadow:inset 0 2px 4px rgba(0,0,0,.25);
}
.sem-liquid-metal-btn:hover .metal-icon-circle,
.sem-card.active-sem:hover .sem-liquid-metal-btn .metal-icon-circle{transform:scale(1.1)}
.sem-liquid-metal-btn .metal-icon-circle i{
  font-size:.92rem;color:var(--metal-icon-color,#2563eb);display:flex;align-items:center;justify-content:center;
}
[data-theme="dark"] .sem-liquid-metal-btn .metal-icon-circle i{color:#60a5fa}

/* Button Label */
.sem-liquid-metal-btn .metal-btn-lbl{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  font-size:.94rem;font-weight:700;letter-spacing:-.01em;
  color:var(--metal-text,#0f172a);white-space:nowrap;
}
[data-theme="dark"] .sem-liquid-metal-btn .metal-btn-lbl{color:#ffffff}

/* Disabled State for Upcoming Semesters */
.sem-liquid-metal-btn.disabled-sem-btn{
  opacity:1;cursor:not-allowed;box-shadow:none;
}
.sem-liquid-metal-btn.disabled-sem-btn::before{
  animation:none;background:#cbd5e1;filter:none;
}
[data-theme="dark"] .sem-liquid-metal-btn.disabled-sem-btn::before{
  background:#3f372c;
}
.sem-liquid-metal-btn.disabled-sem-btn .metal-inner-body{
  background:#f8fafc;border:1.5px solid #cbd5e1;
}
[data-theme="dark"] .sem-liquid-metal-btn.disabled-sem-btn .metal-inner-body{
  background:#1e1a15;border:1.5px solid #3f372c;
}
.sem-liquid-metal-btn.disabled-sem-btn .metal-icon-circle{
  background:#e2e8f0;box-shadow:none;
}
[data-theme="dark"] .sem-liquid-metal-btn.disabled-sem-btn .metal-icon-circle{
  background:#2e261e;box-shadow:none;
}
.sem-liquid-metal-btn.disabled-sem-btn .metal-icon-circle i{
  color:#334155;font-size:.92rem;
}
[data-theme="dark"] .sem-liquid-metal-btn.disabled-sem-btn .metal-icon-circle i{
  color:#f59e0b;font-size:.92rem;
}
.sem-liquid-metal-btn.disabled-sem-btn .metal-btn-lbl{
  color:#1e293b;font-weight:700;font-size:.92rem;
}
[data-theme="dark"] .sem-liquid-metal-btn.disabled-sem-btn .metal-btn-lbl{
  color:#f1f5f9;font-weight:700;font-size:.92rem;
}

.subjects-view{padding-top:32px}
.view-header{margin-bottom:28px}
.view-header-top{display:flex;align-items:flex-start;justify-content:space-between;
  flex-wrap:wrap;gap:16px;padding-bottom:20px;border-bottom:1px solid var(--border-line)}
.view-title-group h2{font-family:var(--font-display);font-size:clamp(1.8rem,3.5vw,2.6rem);
  font-weight:700;color:var(--text-primary);line-height:1.15;letter-spacing:-.02em;margin-bottom:4px}
.view-title-group p{font-size:.93rem;color:var(--text-muted);font-family:var(--font-serif);font-style:italic}
.subjects-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
.subject-card:nth-child(1){grid-column:span 7}
.subject-card:nth-child(2){grid-column:span 5}
.subject-card:nth-child(3){grid-column:span 5}
.subject-card:nth-child(4){grid-column:span 7}
.subject-card:nth-child(5){grid-column:span 12}
@media(max-width:1024px){
  .subjects-grid{grid-template-columns:repeat(2,1fr)}
  .subject-card:nth-child(n){grid-column:span 1}
  .subject-card:nth-child(5){grid-column:span 2}
}
@media(max-width:640px){
  .subjects-grid{grid-template-columns:1fr}
  .subject-card:nth-child(n){grid-column:span 1}
}
.subject-card{background:var(--bg-card);border-radius:var(--radius-xl);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:var(--transition);display:flex;flex-direction:column;
  cursor:pointer;position:relative;border:1px solid var(--border-line)}
.subject-card:hover{transform:translateY(-8px) scale(1.012);box-shadow:var(--shadow-xl);border-color:transparent}
.sub-card-banner{padding:30px 26px 24px;color:#fff;position:relative;overflow:hidden;
  min-height:170px;display:flex;flex-direction:column;justify-content:space-between}
.sub-card-banner::before{content:'';position:absolute;inset:0;opacity:.055;
  pointer-events:none;background:var(--card-pattern,none);background-size:60px 60px}
.sub-card-banner::after{content:'';position:absolute;inset:0;
  background:linear-gradient(to bottom,transparent 20%,rgba(0,0,0,.38) 100%);pointer-events:none}
.sub-code-row{display:flex;align-items:flex-start;justify-content:space-between;
  margin-bottom:0;position:relative;z-index:2}
.sub-code-badge{background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.45);
  padding:4px 12px;border-radius:var(--radius-pill);font-size:.72rem;font-weight:800;
  letter-spacing:.1em;text-transform:uppercase;backdrop-filter:blur(4px)}
.sub-icon-box{width:40px;height:40px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);
  display:flex;align-items:center;justify-content:center;font-size:1.15rem;backdrop-filter:blur(4px)}
.sub-card-banner-content{position:relative;z-index:2;margin-top:auto}
.sub-card-banner h3{font-family:var(--font-display);font-size:clamp(1.15rem,2.5vw,1.42rem);
  font-weight:700;line-height:1.25;margin-bottom:5px;color:#fff}
.sub-tagline{font-size:.84rem;color:rgba(255,255,255,.88);line-height:1.45;
  font-family:var(--font-serif);font-style:italic;display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sub-card-body{padding:18px 22px 20px;display:flex;flex-direction:column;
  justify-content:space-between;flex:1;background:var(--bg-card)}
.sub-stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin-bottom:16px}
.stat-item{text-align:center;padding:10px 4px;border-radius:var(--radius-sm);
  background:var(--bg-surface);transition:var(--transition-fast)}
.subject-card:hover .stat-item{background:var(--sub-badge-bg)}
.stat-value{font-size:1.25rem;font-weight:800;color:var(--text-primary);
  line-height:1;margin-bottom:3px;font-family:var(--font-display)}
.stat-label{font-size:.65rem;color:var(--text-muted);text-transform:uppercase;
  letter-spacing:.06em;font-weight:600}
.sub-open-btn{
  position:relative;width:100%;border-radius:9999px;border:none;background:transparent;
  padding:3px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 4px 14px -2px rgba(0,0,0,.1);margin-top:auto;
}
.sub-open-btn:active{transform:scale(.98)}
.sub-open-btn::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:3px;
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:filter .3s ease;
}
.subject-card:hover .sub-open-btn::before,
.sub-open-btn:hover::before{
  animation-duration:2s;filter:drop-shadow(0 0 8px rgba(147,197,253,.95)) brightness(1.2);
}
.subject-card:hover .sub-open-btn,
.sub-open-btn:hover{
  box-shadow:0 8px 24px -3px rgba(37,99,235,.35),0 0 16px rgba(59,130,246,.25);transform:translateY(-1px);
}
.sub-open-btn::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 60px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.45),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.sub-open-btn:hover::after{opacity:1}
.sub-open-btn .metal-inner-body{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:flex-start;gap:12px;
  padding:5px 18px 5px 6px;border-radius:9999px;background:var(--metal-btn-bg,#ffffff);
  transition:background .2s ease;width:100%;box-sizing:border-box;
}
[data-theme="dark"] .sub-open-btn .metal-inner-body{background:#0e1117}
.subject-card:hover .sub-open-btn .metal-inner-body,
.sub-open-btn:hover .metal-inner-body{background:var(--metal-btn-bg-hover,#f8fafc)}
[data-theme="dark"] .subject-card:hover .sub-open-btn .metal-inner-body,
[data-theme="dark"] .sub-open-btn:hover .metal-inner-body{background:#181c24}
.sub-open-btn .metal-icon-circle{
  width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:var(--metal-icon-bg,#eff6ff);box-shadow:inset 0 2px 4px rgba(0,0,0,.08);flex-shrink:0;
  transition:transform .22s cubic-bezier(.16,1,.3,1),background .2s ease;
}
[data-theme="dark"] .sub-open-btn .metal-icon-circle{background:rgba(59,130,246,.22);box-shadow:inset 0 2px 4px rgba(0,0,0,.25)}
.subject-card:hover .sub-open-btn .metal-icon-circle,
.sub-open-btn:hover .metal-icon-circle{transform:scale(1.1)}
.sub-open-btn .metal-icon-circle i{font-size:.88rem;color:var(--metal-icon-color,#2563eb);display:flex;align-items:center;justify-content:center}
[data-theme="dark"] .sub-open-btn .metal-icon-circle i{color:#60a5fa}
.sub-open-btn .metal-btn-lbl{
  font-family:'Inter',sans-serif;font-size:.92rem;font-weight:700;letter-spacing:-.01em;color:var(--metal-text,#0f172a);white-space:nowrap;
}
[data-theme="dark"] .sub-open-btn .metal-btn-lbl{color:#ffffff}

.subject-hub-view{padding-top:0}
.hub-banner{position:relative;background:var(--sub-gradient);color:#fff;
  margin:0 -24px;padding:48px 40px 36px;overflow:hidden}
.hub-banner::before{content:'';position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:60px 60px;pointer-events:none}
.hub-banner::after{content:'';position:absolute;right:-80px;top:-80px;width:380px;height:380px;
  border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 65%);
  pointer-events:none}
.hub-breadcrumbs{display:flex;align-items:center;gap:8px;font-size:.8rem;
  color:rgba(255,255,255,.7);margin-bottom:18px;flex-wrap:wrap;position:relative;z-index:2}
.hub-breadcrumbs a{color:rgba(255,255,255,.9);font-weight:600;text-decoration:none;
  border-bottom:1px solid rgba(255,255,255,.3);transition:var(--transition-fast)}
.hub-breadcrumbs a:hover{color:var(--sub-accent);border-bottom-color:var(--sub-accent)}
.hub-title-row{display:flex;align-items:flex-start;justify-content:space-between;
  gap:20px;flex-wrap:wrap;margin-bottom:22px;position:relative;z-index:2}
.hub-title-content{flex:1;max-width:860px}
.hub-code-tag{display:inline-block;background:var(--sub-accent);color:#1a1208;
  font-size:.72rem;font-weight:800;letter-spacing:.1em;padding:4px 14px;
  border-radius:var(--radius-pill);text-transform:uppercase;margin-bottom:10px}
.hub-title-content h2{font-family:var(--font-display);font-size:clamp(1.85rem,4vw,2.9rem);
  font-weight:700;line-height:1.15;margin-bottom:8px;letter-spacing:-.02em}
.hub-sub{font-size:clamp(.93rem,2vw,1.05rem);color:rgba(255,255,255,.85);
  line-height:1.55;font-family:var(--font-serif);font-style:italic}
.hub-pills-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;position:relative;z-index:2}
.hub-pill{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);
  padding:6px 16px;border-radius:var(--radius-pill);font-size:.82rem;font-weight:600;
  color:rgba(255,255,255,.95);backdrop-filter:blur(4px)}
.hub-pill b{color:var(--sub-accent)}
.hub-progress-card{background:rgba(0,0,0,.2);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-md);padding:14px 20px;backdrop-filter:blur(8px);position:relative;z-index:2}
.progress-info-row{display:flex;align-items:center;justify-content:space-between;
  font-size:.84rem;color:rgba(255,255,255,.9);margin-bottom:10px;flex-wrap:wrap;gap:8px}
.progress-percent{font-weight:800;color:var(--sub-accent);background:rgba(255,255,255,.12);
  padding:3px 12px;border-radius:var(--radius-pill)}
.progress-bar-track{width:100%;height:7px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.18);overflow:hidden}
.progress-bar-fill{height:100%;background:linear-gradient(90deg,#22c55e 0%,var(--sub-accent) 100%);
  border-radius:var(--radius-pill);transition:width .6s cubic-bezier(.16,1,.3,1)}

.hub-tabs-container{margin:20px 0 0;background:var(--bg-card);border-radius:var(--radius-lg);
  padding:8px;box-shadow:var(--shadow-sm);border:1.5px solid var(--border-line);
  position:sticky;top:62px;z-index:100}
.hub-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
@media(max-width:860px){.hub-tabs{grid-template-columns:repeat(2,1fr);gap:8px}}

.hub-tab-btn{
  position:relative;border-radius:9999px;border:none;background:transparent;
  padding:3px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  display:flex;align-items:center;min-height:48px;
}
.hub-tab-btn:active{transform:scale(.98)}
.hub-tab-btn::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:3px;
  background:#cbd5e1;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:all .3s ease;
}
[data-theme="dark"] .hub-tab-btn::before{background:#3f372c}

.hub-tab-btn.active::before,
.hub-tab-btn:hover::before{
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  filter:drop-shadow(0 0 8px rgba(147,197,253,.95)) brightness(1.2);
}
.hub-tab-btn.active,
.hub-tab-btn:hover{
  box-shadow:0 8px 24px -3px rgba(37,99,235,.35),0 0 16px rgba(59,130,246,.25);
  transform:translateY(-1px);
}
.hub-tab-btn::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 60px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.5),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.hub-tab-btn:hover::after,
.hub-tab-btn.active::after{opacity:1}

.hub-tab-btn .metal-inner-body{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:flex-start;gap:10px;
  padding:5px 16px 5px 6px;border-radius:9999px;background:var(--bg-card);
  transition:background .2s ease,color .2s ease;width:100%;box-sizing:border-box;min-height:42px;
}
[data-theme="dark"] .hub-tab-btn .metal-inner-body{background:#161310}
.hub-tab-btn:hover .metal-inner-body{background:var(--bg-elevated)}
.hub-tab-btn.active .metal-inner-body{background:#ffffff}
[data-theme="dark"] .hub-tab-btn.active .metal-inner-body{background:#0e1117}

.hub-tab-btn .metal-icon-circle{
  width:32px;height:32px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:var(--bg-surface);box-shadow:inset 0 2px 4px rgba(0,0,0,.08);flex-shrink:0;
  transition:transform .22s cubic-bezier(.16,1,.3,1),background .2s ease;
}
[data-theme="dark"] .hub-tab-btn .metal-icon-circle{background:#231f1a}
.hub-tab-btn.active .metal-icon-circle{background:#eff6ff}
[data-theme="dark"] .hub-tab-btn.active .metal-icon-circle{background:rgba(59,130,246,.25)}
.hub-tab-btn:hover .metal-icon-circle,
.hub-tab-btn.active .metal-icon-circle{transform:scale(1.08)}
.hub-tab-btn .metal-icon-circle i{font-size:.88rem;color:var(--text-muted);transition:color .2s ease}
[data-theme="dark"] .hub-tab-btn .metal-icon-circle i{color:#94a3b8}
.hub-tab-btn.active .metal-icon-circle i{color:#2563eb}
[data-theme="dark"] .hub-tab-btn.active .metal-icon-circle i{color:#60a5fa}

.hub-tab-btn .metal-btn-lbl{
  font-family:'Inter',sans-serif;font-size:.88rem;font-weight:700;letter-spacing:-.01em;
  color:var(--text-secondary);white-space:nowrap;transition:color .2s ease;
}
[data-theme="dark"] .hub-tab-btn .metal-btn-lbl{color:#cbd5e1}
.hub-tab-btn.active .metal-btn-lbl{color:#0f172a;font-weight:800}
[data-theme="dark"] .hub-tab-btn.active .metal-btn-lbl{color:#ffffff;font-weight:800}

.hub-filter-bar{display:flex;align-items:center;gap:12px;margin:18px 0 12px;flex-wrap:wrap}
.search-box-wrap{flex:1;min-width:260px;position:relative}
.search-box-wrap>i.fa-magnifying-glass{position:absolute;left:14px;top:50%;
  transform:translateY(-50%);color:var(--text-faint);font-size:.9rem;pointer-events:none}
.search-input{width:100%;padding:11px 40px 11px 40px;border-radius:var(--radius-sm);
  border:1.5px solid var(--border-line);background:var(--bg-card);color:var(--text-primary);
  font-size:.92rem;font-family:inherit;transition:var(--transition);min-height:44px}
.search-input::placeholder{color:var(--text-faint)}
.search-input:focus{outline:none;border-color:var(--sub-primary);box-shadow:0 0 0 3px rgba(26,42,74,.1)}
.search-clear-btn{position:absolute;right:12px;top:50%;transform:translateY(-50%);
  background:none;border:none;color:var(--text-faint);font-size:.9rem;padding:6px;
  display:flex;align-items:center;justify-content:center;border-radius:50%}
.search-clear-btn:hover{color:var(--text-primary)}
.unit-filter-select{padding:11px 16px;border-radius:var(--radius-sm);
  border:1.5px solid var(--border-line);background:var(--bg-card);color:var(--text-primary);
  font-size:.88rem;font-family:inherit;font-weight:600;cursor:pointer;
  min-width:200px;transition:var(--transition);min-height:44px}
.unit-filter-select:focus{outline:none;border-color:var(--sub-primary)}
.quick-filter-chips{display:flex;align-items:center;gap:8px;margin-bottom:20px;
  overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.quick-filter-chips::-webkit-scrollbar{display:none}
.filter-chip{
  position:relative;border-radius:9999px;border:none;background:transparent;
  padding:2.5px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 2px 6px rgba(0,0,0,.06);display:inline-flex;
}
.filter-chip:active{transform:scale(.98)}
.filter-chip::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:2.5px;
  background:#cbd5e1;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:all .3s ease;
}
[data-theme="dark"] .filter-chip::before{background:#3f372c}
.filter-chip.active::before,
.filter-chip:hover::before{
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  filter:drop-shadow(0 0 6px rgba(147,197,253,.9)) brightness(1.2);
}
.filter-chip.active,
.filter-chip:hover{
  box-shadow:0 6px 18px -2px rgba(37,99,235,.32),0 0 12px rgba(59,130,246,.2);
  transform:translateY(-1px);
}
.filter-chip::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 45px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.5),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.filter-chip:hover::after,
.filter-chip.active::after{opacity:1}
.filter-chip .chip-inner-body{
  position:relative;z-index:1;display:inline-flex;align-items:center;gap:6px;
  padding:5px 16px;border-radius:9999px;background:var(--bg-card);color:var(--text-secondary);
  font-family:'Inter',sans-serif;font-size:.84rem;font-weight:700;white-space:nowrap;transition:background .2s ease,color .2s ease;
}
[data-theme="dark"] .filter-chip .chip-inner-body{background:#181512;color:#cbd5e1}
.filter-chip:hover .chip-inner-body{background:var(--bg-elevated);color:var(--text-primary)}
.filter-chip.active .chip-inner-body{background:#ffffff;color:#0f172a}
[data-theme="dark"] .filter-chip.active .chip-inner-body{background:#0e1117;color:#ffffff}
.tab-content-pane{display:none}
.tab-content-pane.active{display:block}
.hub-content-container{padding-bottom:40px}

.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:18px}
@media(max-width:640px){.topics-grid{grid-template-columns:1fr}}
.unit-card{background:var(--bg-card);border:1.5px solid var(--border-line);
  border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-xs);
  transition:var(--transition);display:flex;flex-direction:column;
  justify-content:space-between;position:relative;overflow:hidden;cursor:pointer}
.unit-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--sub-primary),var(--sub-accent));opacity:0;transition:var(--transition)}
.unit-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--sub-border)}
.unit-card:hover::before{opacity:1}
.unit-card.is-completed{border-color:#86efac;background:linear-gradient(180deg,#f0fdf4 0%,var(--bg-card) 30%)}
[data-theme="dark"] .unit-card.is-completed{border-color:#14532d;background:linear-gradient(180deg,rgba(16,185,129,.05) 0%,var(--bg-card) 30%)}
.unit-card-header{display:flex;align-items:flex-start;gap:14px;margin-bottom:12px}
.unit-badge-number{width:44px;height:44px;border-radius:var(--radius-sm);
  background:var(--sub-badge-bg);color:var(--sub-primary);display:flex;align-items:center;
  justify-content:center;font-weight:800;font-size:1.15rem;font-family:var(--font-display);
  flex-shrink:0;border:1.5px solid var(--sub-border)}
.unit-card-titles{flex:1}
.unit-subject-tag{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;
  color:var(--sub-primary);background:var(--sub-bg-tint);padding:2px 8px;border-radius:var(--radius-pill);
  border:1px solid var(--sub-border);display:inline-block;white-space:nowrap}
.unit-card-titles h4, .unit-card-title{font-family:var(--font-display);font-size:1.12rem;font-weight:700;
  line-height:1.32;color:var(--text-primary);letter-spacing:-.01em;margin-top:5px}
.unit-sub{font-size:.8rem;color:var(--text-muted);margin-top:3px;
  line-height:1.4;font-family:var(--font-serif);font-style:italic}
.unit-check-btn{
  position:relative;background:var(--bg-card);border:1.5px solid var(--border-line);
  color:var(--text-secondary);padding:5px 14px;border-radius:var(--radius-pill);font-size:.76rem;
  font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:6px;
  transition:var(--transition-fast);user-select:none;box-shadow:0 2px 5px rgba(0,0,0,.04);
}
.unit-check-btn:hover{
  border-color:#3b82f6;color:#2563eb;box-shadow:0 4px 12px rgba(59,130,246,.25);transform:translateY(-1px);
}
.unit-check-btn.checked{
  background:#f0fdf4;color:#15803d;border-color:#86efac;box-shadow:0 2px 8px rgba(34,197,94,.2);
}
[data-theme="dark"] .unit-check-btn{background:#181512;border-color:#3e3628;color:#cbd5e1}
[data-theme="dark"] .unit-check-btn:hover{border-color:#3b82f6;color:#60a5fa}
[data-theme="dark"] .unit-check-btn.checked{background:rgba(16,185,129,.15);color:#4ade80;border-color:rgba(16,185,129,.4)}
.unit-maxim-box{margin:12px 0 16px;background:var(--sub-bg-tint);border-left:3.5px solid var(--sub-accent);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:11px 14px;transition:var(--transition)}
.unit-card:hover .unit-maxim-box{background:var(--bg-elevated)}
.unit-maxim-header{display:flex;align-items:center;gap:6px;font-size:.68rem;font-family:var(--font-sans);
  font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--sub-accent);margin-bottom:4px}
.unit-maxim-text{font-family:var(--font-serif);font-style:italic;font-size:.92rem;line-height:1.45;
  color:var(--text-primary);font-weight:600}
.unit-statutes{margin:12px 0;background:var(--sub-bg-tint);border-left:3px solid var(--sub-accent);
  padding:9px 14px;border-radius:0 var(--radius-xs) var(--radius-xs) 0;
  font-size:.82rem;color:var(--text-secondary);font-family:var(--font-serif)}
.unit-topics-list{list-style:none;margin:12px 0 18px}
.unit-topics-list li{font-size:.85rem;color:var(--text-muted);position:relative;
  padding-left:16px;margin-bottom:5px;line-height:1.45}
.unit-topics-list li::before{content:'›';position:absolute;left:2px;
  color:var(--sub-accent);font-weight:bold;font-size:1rem}
.unit-actions-row{display:flex;gap:10px;align-items:center;margin-top:auto}

/* VengeanceUI Liquid Metal Button for Topic Cards (colorBack: #3b82f6, colorTint: #93c5fd) */
.btn-read-notes.topic-liquid-metal-btn{
  position:relative;flex:1;min-width:0;border-radius:9999px;border:none;background:transparent;
  padding:3px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 6px 18px -3px rgba(37,99,235,.25),0 2px 6px rgba(0,0,0,.04);
  display:flex;align-items:center;min-height:44px;
}
.btn-read-notes.topic-liquid-metal-btn:active{transform:scale(.98)}

/* Flowing Liquid Metal Outer Border */
.btn-read-notes.topic-liquid-metal-btn::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:3px;
  background:linear-gradient(
    115deg,
    #1d4ed8 0%,
    #2563eb 15%,
    #3b82f6 30%,
    #93c5fd 46%,
    #ffffff 54%,
    #93c5fd 64%,
    #3b82f6 80%,
    #1d4ed8 100%
  );
  background-size:260% 260%;
  animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  pointer-events:none;z-index:2;transition:filter .3s ease;
}
.btn-read-notes.topic-liquid-metal-btn:hover::before,
.unit-card:hover .btn-read-notes.topic-liquid-metal-btn::before{
  animation-duration:2s;
  filter:drop-shadow(0 0 8px rgba(147,197,253,.95)) brightness(1.2);
}
.btn-read-notes.topic-liquid-metal-btn:hover,
.unit-card:hover .btn-read-notes.topic-liquid-metal-btn{
  box-shadow:0 8px 24px -2px rgba(37,99,235,.38),0 0 16px rgba(59,130,246,.3);
  transform:translateY(-1px);
}

/* Dynamic Glossy Specular Sheen Tracking Cursor */
.btn-read-notes.topic-liquid-metal-btn::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 55px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.5),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.btn-read-notes.topic-liquid-metal-btn:hover::after{opacity:1}

/* Inner Button Body */
.btn-read-notes.topic-liquid-metal-btn .metal-inner-body{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:flex-start;
  gap:10px;padding:4px 16px 4px 5px;border-radius:9999px;
  background:var(--metal-btn-bg,#ffffff);transition:background .2s ease;
  width:100%;box-sizing:border-box;min-height:38px;
}
[data-theme="dark"] .btn-read-notes.topic-liquid-metal-btn .metal-inner-body{background:#0e1117}
.btn-read-notes.topic-liquid-metal-btn:hover .metal-inner-body,
.unit-card:hover .btn-read-notes.topic-liquid-metal-btn .metal-inner-body{background:var(--metal-btn-bg-hover,#f8fafc)}
[data-theme="dark"] .btn-read-notes.topic-liquid-metal-btn:hover .metal-inner-body,
[data-theme="dark"] .unit-card:hover .btn-read-notes.topic-liquid-metal-btn .metal-inner-body{background:#181c24}

/* Inset Circular Icon */
.btn-read-notes.topic-liquid-metal-btn .metal-icon-circle{
  width:32px;height:32px;border-radius:50%;display:inline-flex;align-items:center;
  justify-content:center;background:var(--metal-icon-bg,#eff6ff);
  box-shadow:inset 0 2px 4px rgba(0,0,0,.08);flex-shrink:0;
  transition:transform .22s cubic-bezier(.16,1,.3,1),background .2s ease;
}
[data-theme="dark"] .btn-read-notes.topic-liquid-metal-btn .metal-icon-circle{
  background:rgba(59,130,246,.2);box-shadow:inset 0 2px 4px rgba(0,0,0,.25);
}
.btn-read-notes.topic-liquid-metal-btn:hover .metal-icon-circle,
.unit-card:hover .btn-read-notes.topic-liquid-metal-btn .metal-icon-circle{transform:scale(1.1)}
.btn-read-notes.topic-liquid-metal-btn .metal-icon-circle i{
  font-size:.88rem;color:var(--metal-icon-color,#2563eb);display:flex;align-items:center;justify-content:center;
}
[data-theme="dark"] .btn-read-notes.topic-liquid-metal-btn .metal-icon-circle i{color:#60a5fa}

/* Button Label */
.btn-read-notes.topic-liquid-metal-btn .metal-btn-lbl{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  font-size:.88rem;font-weight:700;letter-spacing:-.01em;
  color:var(--metal-text,#0f172a);white-space:nowrap;
}
[data-theme="dark"] .btn-read-notes.topic-liquid-metal-btn .metal-btn-lbl{color:#f8fafc}

/* Companion Open in New Tab Button */
.btn-open-newtab{
  position:relative;width:44px;height:44px;border-radius:50%;border:none;background:transparent;
  padding:2.5px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 4px 14px -2px rgba(0,0,0,.1);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.btn-open-newtab:active{transform:scale(.95)}
.btn-open-newtab::before{
  content:"";position:absolute;inset:0;border-radius:50%;padding:2.5px;
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:filter .3s ease;
}
.unit-card:hover .btn-open-newtab::before,
.btn-open-newtab:hover::before{
  animation-duration:2s;filter:drop-shadow(0 0 7px rgba(147,197,253,.95)) brightness(1.2);
}
.unit-card:hover .btn-open-newtab,
.btn-open-newtab:hover{
  box-shadow:0 6px 18px -2px rgba(37,99,235,.35),0 0 12px rgba(59,130,246,.25);transform:scale(1.06);
}
.btn-open-newtab::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  background:radial-gradient(circle 25px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.5),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.btn-open-newtab:hover::after{opacity:1}
.btn-open-newtab .newtab-inner{
  position:relative;z-index:1;width:100%;height:100%;border-radius:50%;
  background:var(--metal-btn-bg,#ffffff);display:flex;align-items:center;justify-content:center;
  transition:background .2s ease;
}
[data-theme="dark"] .btn-open-newtab .newtab-inner{background:#0e1117}
.btn-open-newtab i{font-size:.88rem;color:var(--metal-icon-color,#2563eb)}
[data-theme="dark"] .btn-open-newtab i{color:#60a5fa}

.cases-list{display:flex;flex-direction:column;gap:20px}
.case-card{background:var(--bg-card);border:1.5px solid var(--border-line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-xs);
  transition:var(--transition);position:relative}
.case-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;
  background:var(--sub-gradient)}
.case-card:hover{border-color:var(--sub-border);box-shadow:var(--shadow-md);transform:translateX(3px)}
.case-card-header{padding:18px 22px 14px 24px;background:var(--sub-bg-tint);
  border-bottom:1px solid var(--border-line);display:flex;align-items:flex-start;
  justify-content:space-between;gap:14px;flex-wrap:wrap}
.case-title-area h3{font-family:var(--font-display);font-size:1.2rem;font-weight:700;
  color:var(--text-primary);line-height:1.3;font-style:italic}
.case-citation{font-size:.8rem;color:var(--sub-primary);font-weight:600;margin-top:4px}
.case-badge-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.case-unit-tag{background:var(--bg-card);border:1px solid var(--border-line);
  color:var(--text-muted);padding:3px 10px;border-radius:var(--radius-pill);
  font-size:.73rem;font-weight:700}
.btn-copy-cite{
  position:relative;border-radius:9999px;border:none;background:transparent;
  padding:2.5px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;
  text-decoration:none;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 2px 6px rgba(0,0,0,.06);display:inline-flex;align-items:center;
}
.btn-copy-cite:active{transform:scale(.97)}
.btn-copy-cite::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:2px;
  background:#cbd5e1;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:all .3s ease;
}
[data-theme="dark"] .btn-copy-cite::before{background:#3f372c}
.btn-copy-cite:hover::before{
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  filter:drop-shadow(0 0 6px rgba(147,197,253,.9)) brightness(1.2);
}
.btn-copy-cite:hover{
  box-shadow:0 4px 14px -2px rgba(37,99,235,.3);transform:translateY(-1px);
}
.btn-copy-cite .copy-cite-inner{
  position:relative;z-index:1;display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:9999px;background:var(--bg-card);color:var(--text-secondary);
  font-family:'Inter',sans-serif;font-size:.76rem;font-weight:700;white-space:nowrap;transition:background .2s ease,color .2s ease;
}
[data-theme="dark"] .btn-copy-cite .copy-cite-inner{background:#181512;color:#cbd5e1}
.btn-copy-cite:hover .copy-cite-inner{background:var(--bg-elevated);color:#2563eb}
[data-theme="dark"] .btn-copy-cite:hover .copy-cite-inner{color:#60a5fa}
.case-card-body{padding:20px 24px 22px}
.firac-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
@media(max-width:860px){.firac-grid{grid-template-columns:1fr}}
.firac-box{padding:16px 20px;border-radius:var(--radius-md);border:1px solid var(--border-line);
  font-size:.92rem;line-height:1.68}
.firac-box.facts{background:var(--bg-surface)}
.firac-box.ratio{background:var(--sub-bg-tint);border-color:var(--sub-border)}
.firac-label{font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:6px;margin-bottom:10px}
.firac-box.facts .firac-label{color:var(--text-muted)}
.firac-box.ratio .firac-label{color:var(--sub-primary)}

.case-text-block{font-family:var(--font-body);color:var(--text-primary);line-height:1.68}
.case-text-block p{margin-bottom:10px;line-height:1.68}
.case-text-block p:last-child{margin-bottom:0}
.case-text-block ul,
.case-text-block ol{margin:8px 0 10px 22px;padding:0;line-height:1.65}
.case-text-block li{margin-bottom:6px}
.case-text-block b,
.case-text-block strong{font-weight:700;color:var(--text-primary)}

.case-extra-box{padding:14px 20px;border-radius:var(--radius-md);border:1px solid var(--border-line);
  margin-bottom:14px;font-size:.9rem;line-height:1.65}
.case-extra-box.issues-box{background:var(--bg-surface);border-left:4px solid var(--sub-primary)}
.case-extra-box.args-box{background:var(--bg-surface);border-left:4px solid #475569}
.case-extra-box.tips-box{background:#fffbeb;border:1px solid #fde68a;border-left:4px solid var(--du-gold);color:#78350f}
[data-theme="dark"] .case-extra-box.tips-box{background:#201708;border-color:#3b280c;color:#fde68a}

.extra-box-label{font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:6px;margin-bottom:8px}
.case-extra-box.issues-box .extra-box-label{color:var(--sub-primary)}
.case-extra-box.args-box .extra-box-label{color:#475569}
.case-extra-box.tips-box .extra-box-label{color:#b45309}
[data-theme="dark"] .case-extra-box.tips-box .extra-box-label{color:#f59e0b}

.case-footer-actions{display:flex;justify-content:flex-end;gap:8px;padding-top:6px}
.btn-case-reader{font-size:.84rem;font-weight:700;color:var(--sub-primary);
  background:var(--sub-badge-bg);border:1px solid var(--sub-border);cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;padding:8px 16px;
  border-radius:var(--radius-pill);transition:var(--transition-fast)}
.btn-case-reader:hover{background:var(--sub-primary);color:#fff}

.pyq-list{display:flex;flex-direction:column;gap:16px}
.pyq-card{background:var(--bg-card);border:1.5px solid var(--border-line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-xs);transition:var(--transition)}
.pyq-card:hover{border-color:var(--sub-border);box-shadow:var(--shadow-sm)}
.pyq-header{padding:13px 18px;background:var(--sub-bg-tint);border-bottom:1px solid var(--border-line);
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
.pyq-badge-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.pyq-no-badge{background:var(--sub-primary);color:#fff;font-weight:800;font-size:.76rem;
  padding:3px 10px;border-radius:var(--radius-xs)}
.pyq-marks-badge{background:var(--du-gold-light);color:var(--du-gold-muted);font-weight:700;
  font-size:.74rem;padding:3px 10px;border-radius:var(--radius-pill);
  border:1px solid rgba(201,168,76,.25)}
.btn-bookmark-pyq{background:none;border:none;color:var(--text-faint);cursor:pointer;
  font-size:1rem;padding:4px 6px;transition:var(--transition-fast)}
.btn-bookmark-pyq:hover,.btn-bookmark-pyq.bookmarked{color:var(--du-gold)}
.pyq-unit-label{font-size:.76rem;color:var(--text-muted);font-weight:600}
.pyq-body{padding:18px 20px}
.pyq-question-text{font-size:1.05rem;font-weight:600;color:var(--text-primary);
  line-height:1.5;margin-bottom:16px;font-family:var(--font-display)}
.model-ans-accordion{background:var(--bg-surface);border:1px solid var(--border-line);
  border-radius:var(--radius-sm);overflow:hidden}
.model-ans-header{padding:12px 16px;cursor:pointer;display:flex;align-items:center;
  justify-content:space-between;font-size:.85rem;font-weight:700;color:var(--sub-primary);
  transition:var(--transition-fast);user-select:none}
.model-ans-header:hover{background:var(--bg-elevated)}
.model-ans-header i.chevron-icon{transition:transform .25s ease;color:var(--text-muted)}
.model-ans-content{padding:20px 24px;font-size:.92rem;line-height:1.72;color:var(--text-primary);
  border-top:1px solid var(--border-line);background:var(--bg-card);font-family:var(--font-body)}
.model-ans-content h4,
.model-ans-content h5{font-family:var(--font-display);font-size:1.05rem;font-weight:700;color:var(--sub-primary);
  margin:16px 0 8px 0;letter-spacing:-.01em}
.model-ans-content h4:first-child,
.model-ans-content h5:first-child{margin-top:0}
.model-ans-content p{margin-bottom:12px;line-height:1.72}
.model-ans-content p:last-child{margin-bottom:0}
.model-ans-content .lbl{display:inline-block;font-size:.76rem;font-weight:800;text-transform:uppercase;
  letter-spacing:.08em;color:var(--sub-primary);background:var(--sub-badge-bg);border:1px solid var(--sub-border);
  padding:3px 10px;border-radius:var(--radius-pill);margin-bottom:10px}
.model-ans-content ol.pts,
.model-ans-content ol{margin:10px 0 14px 22px;padding:0;line-height:1.68}
.model-ans-content ol.pts li,
.model-ans-content ol li,
.model-ans-content ul li{margin-bottom:8px}
.model-ans-content b,
.model-ans-content strong{font-weight:700;color:var(--text-primary)}
.model-ans-content table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.88rem}
.model-ans-content th,
.model-ans-content td{padding:8px 12px;border:1px solid var(--border-line)}
.model-ans-content th{background:var(--sub-primary);color:#fff;font-weight:700}

/* =========================================================================
   TOPIC-WISE SEGREGATION & TOPIC JUMP NAVIGATION
   ========================================================================= */
.topic-jump-nav{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:12px 18px;
  background:var(--bg-card);border:1px solid var(--border-line);border-radius:var(--radius-lg);
  margin-bottom:24px;box-shadow:var(--shadow-sm)}
.jump-nav-title{font-size:.82rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;
  letter-spacing:.05em;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.jump-chips-wrap{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.jump-chip{background:var(--bg-surface);border:1px solid var(--border-line);color:var(--text-primary);
  font-size:.8rem;font-weight:600;padding:5px 12px;border-radius:var(--radius-pill);cursor:pointer;
  transition:var(--transition-fast);display:inline-flex;align-items:center;gap:6px}
.jump-chip:hover{background:var(--sub-bg-tint);border-color:var(--sub-border);color:var(--sub-primary)}
.jump-chip.active{background:var(--sub-primary);border-color:var(--sub-primary);color:#fff}
.jump-chip .chip-count{font-size:.72rem;font-weight:750;background:rgba(0,0,0,0.08);padding:2px 7px;
  border-radius:var(--radius-pill)}
.jump-chip.active .chip-count{background:rgba(255,255,255,0.25);color:#fff}

.topic-segregated-container{display:flex;flex-direction:column;gap:36px}
.topic-group-section{position:relative;background:var(--bg-surface);border:1px solid var(--border-line);
  border-radius:var(--radius-xl);padding:20px 24px;box-shadow:var(--shadow-sm);transition:var(--transition);
  scroll-margin-top:140px}
.topic-group-section:hover{border-color:var(--sub-border);box-shadow:var(--shadow-md)}
.topic-group-header{padding-bottom:16px;margin-bottom:20px;border-bottom:2px solid var(--border-line)}
.topic-group-header-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.topic-group-badge{background:var(--sub-primary);color:#fff;font-size:.74rem;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;padding:4px 12px;border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;gap:6px}
.topic-group-count{background:var(--sub-badge-bg);color:var(--sub-badge-color);border:1px solid var(--sub-border);
  font-size:.76rem;font-weight:700;padding:4px 12px;border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;gap:6px}
.topic-group-title{font-family:var(--font-display);font-size:clamp(1.2rem,2.2vw,1.5rem);font-weight:700;
  color:var(--text-primary);line-height:1.3;margin:0}

.revision-container{display:flex;flex-direction:column;gap:24px}
.rev-card{background:var(--bg-card);border:1.5px solid var(--border-line);
  border-radius:var(--radius-xl);padding:24px 28px;box-shadow:var(--shadow-sm);
  transition:var(--transition);position:relative;overflow:hidden}
.rev-card:hover{border-color:var(--sub-border);box-shadow:var(--shadow-md)}
.rev-card-header{display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--border-line)}
.rev-card-header-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rev-unit-badge{background:var(--sub-badge-bg);color:var(--sub-badge-color);font-size:.74rem;
  font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:4px 12px;
  border-radius:var(--radius-pill);border:1px solid var(--sub-border)}
.rev-badge-pill{background:var(--sub-primary);color:#fff;font-size:.72rem;
  font-weight:800;letter-spacing:.12em;text-transform:uppercase;padding:5px 14px;
  border-radius:var(--radius-pill);display:inline-flex;align-items:center;gap:5px}
.btn-rev-reader{background:var(--bg-surface);border:1.5px solid var(--border-line);
  color:var(--sub-primary);font-weight:700;font-size:.8rem;padding:6px 14px;
  border-radius:var(--radius-pill);cursor:pointer;transition:var(--transition-fast);
  display:inline-flex;align-items:center;gap:6px}
.btn-rev-reader:hover{background:var(--sub-primary);color:#fff;border-color:transparent}
.rev-card-title-area{margin:16px 0 12px}
.rev-card-title-area h3{font-family:var(--font-display);font-size:clamp(1.25rem,2.5vw,1.6rem);
  font-weight:700;color:var(--text-primary);line-height:1.25;margin-bottom:4px}
.rev-unit-subtitle{font-family:var(--font-serif);font-size:.92rem;font-style:italic;color:var(--text-muted)}
.rev-content-body{font-size:.92rem;line-height:1.65;color:var(--text-primary)}
.rev-table-wrap{overflow-x:auto;margin:16px 0 20px;border-radius:var(--radius-sm);
  border:1.5px solid var(--border-line);-webkit-overflow-scrolling:touch}
.rev-table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:540px}
.rev-table th{background:var(--sub-primary);color:#fff;padding:12px 18px;
  text-align:left;font-weight:700;font-size:.84rem;letter-spacing:.03em}
.rev-table td{padding:13px 18px;border-bottom:1px solid var(--border-line);
  vertical-align:top;font-family:var(--font-serif);font-size:.94rem}
.rev-table td:first-child{font-style:italic;font-weight:500;color:var(--text-primary)}
.rev-table tr:nth-child(even) td{background:var(--bg-surface)}
.rev-table tr:hover td{background:var(--sub-bg-tint)}
.rev-exam-strategy{background:#fffbeb;border:1px solid #fde68a;border-left:4px solid var(--du-gold);
  border-radius:var(--radius-sm);padding:16px 20px;margin:16px 0 12px;font-size:.9rem;
  line-height:1.65;color:#78350f}
[data-theme="dark"] .rev-exam-strategy{background:#201708;border-color:#3b280c;
  border-left-color:var(--du-gold);color:#fef3c7}
.rev-case-map{background:var(--sub-bg-tint);border:1px solid var(--sub-border);
  border-left:4px solid var(--sub-primary);border-radius:var(--radius-sm);
  padding:14px 18px;margin:12px 0;font-size:.88rem;line-height:1.6;color:var(--text-secondary)}
.rev-callout-label{font-weight:800;font-size:.78rem;letter-spacing:.08em;
  text-transform:uppercase;margin-bottom:6px;display:flex;align-items:center;gap:6px}
.rev-exam-strategy .rev-callout-label{color:var(--du-gold-muted)}
[data-theme="dark"] .rev-exam-strategy .rev-callout-label{color:var(--du-gold)}
.rev-case-map .rev-callout-label{color:var(--sub-primary)}

.reader-modal{position:fixed;top:0;left:0;width:100%;height:100%;
  background:rgba(10,8,5,.88);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  z-index:500;display:none;align-items:center;justify-content:center;padding:16px}
.reader-modal.active{display:flex}
.reader-window{width:100%;max-width:1280px;height:94vh;background:var(--bg-card);
  border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);display:flex;
  flex-direction:column;overflow:hidden;border:1px solid var(--border-strong)}
.reader-header{padding:12px 18px;background:var(--sub-gradient);color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:14px}
.reader-title-box h3{font-family:var(--font-display);font-size:clamp(.9rem,2.5vw,1.05rem);
  font-weight:700;color:#fff}
.reader-title-box p{font-size:.73rem;color:var(--sub-accent);font-weight:600}
.reader-controls{display:flex;align-items:center;gap:8px}
.btn-reader-action{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);
  color:#fff;padding:7px 14px;border-radius:var(--radius-xs);font-size:.82rem;font-weight:700;
  cursor:pointer;transition:var(--transition-fast);display:inline-flex;align-items:center;
  gap:6px;min-height:36px}
.btn-reader-action:hover{background:#fff;color:var(--sub-primary)}
.btn-reader-close{background:rgba(239,68,68,.9);border:none;color:#fff;width:36px;height:36px;
  border-radius:var(--radius-xs);display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:1.1rem;transition:var(--transition-fast)}
.btn-reader-close:hover{background:#dc2626;transform:scale(1.06)}
.reader-iframe-wrap{flex:1;width:100%;background:#fff}
.reader-iframe{width:100%;height:100%;border:none}
@media(max-width:768px){
  .reader-modal{padding:0}
  .reader-window{height:100vh;height:100dvh;border-radius:0;max-width:100%;border:none}
  .btn-reader-action span{display:none}
}

.mobile-bottom-nav{position:fixed;bottom:0;left:0;width:100%;height:62px;
  background:var(--bg-card);border-top:1px solid var(--border-line);display:none;
  grid-template-columns:repeat(5,1fr);align-items:center;z-index:180;
  box-shadow:0 -4px 20px rgba(0,0,0,.08);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
@media(max-width:768px){.mobile-bottom-nav.active{display:grid}}
.mobile-nav-item{background:none;border:none;color:var(--text-faint);display:flex;
  flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:.65rem;
  font-weight:700;cursor:pointer;padding:6px 0;transition:var(--transition-fast);
  height:100%;text-transform:uppercase;letter-spacing:.03em}
.mobile-nav-item i{font-size:1.1rem}
.mobile-nav-item.active{color:var(--sub-primary)}

.toast-notification{position:fixed;bottom:82px;left:50%;transform:translateX(-50%) translateY(24px);
  background:var(--du-ink);color:#fff;padding:10px 22px;border-radius:var(--radius-pill);
  font-size:.84rem;font-weight:600;display:flex;align-items:center;gap:8px;
  box-shadow:var(--shadow-xl);opacity:0;pointer-events:none;
  transition:all .3s cubic-bezier(.16,1,.3,1);z-index:600;white-space:nowrap;
  border:1px solid rgba(255,255,255,.1)}
@media(min-width:769px){.toast-notification{bottom:28px}}
.toast-notification.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast-notification i{color:#4ade80}

.scroll-top-btn{
  position:fixed;right:20px;bottom:76px;width:48px;height:48px;
  border-radius:50%;border:none;background:transparent;padding:3px;
  box-shadow:0 8px 24px -4px rgba(37,99,235,.4),0 2px 8px rgba(0,0,0,.15);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease,opacity .3s ease,visibility .3s ease;
  z-index:150;outline:none;user-select:none;
}
@media(min-width:769px){.scroll-top-btn{bottom:28px;right:28px}}
.scroll-top-btn.visible{opacity:1;visibility:visible;transform:translateY(0)}
.scroll-top-btn:active{transform:scale(.95)}
.scroll-top-btn::before{
  content:"";position:absolute;inset:0;border-radius:50%;padding:3px;
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:filter .3s ease;
}
.scroll-top-btn:hover::before{
  animation-duration:2s;filter:drop-shadow(0 0 8px rgba(147,197,253,.95)) brightness(1.25);
}
.scroll-top-btn:hover{
  box-shadow:0 12px 32px -4px rgba(37,99,235,.55),0 0 16px rgba(59,130,246,.4);transform:translateY(-3px);
}
.scroll-top-btn::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  background:radial-gradient(circle 30px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.5),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.scroll-top-btn:hover::after{opacity:1}
.scroll-top-btn .scroll-inner{
  position:relative;z-index:1;width:100%;height:100%;border-radius:50%;
  background:var(--metal-btn-bg,#ffffff);display:flex;align-items:center;justify-content:center;
  transition:background .2s ease;
}
[data-theme="dark"] .scroll-top-btn .scroll-inner{background:#0e1117}
.scroll-top-btn .scroll-inner i{font-size:1.05rem;color:#2563eb}
[data-theme="dark"] .scroll-top-btn .scroll-inner i{color:#60a5fa}

.site-footer{background:var(--du-ink);border-top:1px solid rgba(201,168,76,.15);
  padding:40px 24px;margin-top:auto;text-align:center;position:relative;overflow:hidden}
.site-footer::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 60% 80% at 15% 50%,rgba(139,26,26,.22) 0%,transparent 60%),
    radial-gradient(ellipse 40% 60% at 85% 50%,rgba(201,168,76,.1) 0%,transparent 60%);
  pointer-events:none}
.footer-inner{max-width:900px;margin:0 auto;display:flex;flex-direction:column;
  align-items:center;gap:12px;position:relative}
.footer-logo{font-family:var(--font-display);font-weight:700;font-size:.92rem;
  color:var(--du-gold);letter-spacing:.1em;text-transform:uppercase}
.footer-text{font-size:.82rem;color:rgba(255,255,255,.5);max-width:680px;}
.footer-credits{font-size:.74rem;color:rgba(255,255,255,.28)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;margin:4px 0 2px;font-size:.82rem}
.footer-legal-links a{color:#93c5fd;text-decoration:none;font-weight:500;transition:color .2s}
.footer-legal-links a:hover{color:#fff;text-decoration:underline}
.footer-dot{color:rgba(255,255,255,.3)}

.empty-state{text-align:center;padding:56px 20px;background:var(--bg-card);
  border-radius:var(--radius-lg);border:1.5px dashed var(--border-strong);color:var(--text-muted)}
.empty-state i{font-size:2.4rem;color:var(--text-faint);margin-bottom:12px;display:block}
.empty-state h4{font-family:var(--font-display);font-size:1.15rem;font-weight:700;
  color:var(--text-primary);margin-bottom:6px}
.empty-state p{font-size:.88rem;font-family:var(--font-serif)}
@keyframes fadeInUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .3s cubic-bezier(.16,1,.3,1) both}

@media (max-width: 768px) {
  /* Layout & Viewport Containment */
  html, body {
    overflow-x: hidden;
    max-width: 100vw;
  }
  .main-wrapper {
    padding: 0 14px 40px;
    max-width: 100%;
    overflow-x: clip;
  }
  
  /* Cinematic Hero Section */
  .sem-hero-cinematic {
    padding: 44px 16px 36px;
    margin: 0 -14px;
    min-height: 280px;
  }
  .hero-particle-text-stage {
    min-height: 150px;
    margin-bottom: 8px;
    max-width: 100%;
  }
  .sem-hero-badge {
    padding: 5px 16px;
    font-size: 0.72rem;
    margin-bottom: 16px;
  }
  .sem-hero-content > p {
    font-size: 0.90rem;
    line-height: 1.55;
    padding: 0 16px;
    max-width: 100%;
    box-sizing: border-box;
  }
  .sem-hero-ornament {
    margin-top: 20px;
    font-size: 0.68rem;
    letter-spacing: 0.16em;
  }
  .sem-hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 360px;
    margin: 24px auto 0;
    gap: 10px;
  }
  .hero-btn-primary,
  .hero-btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
    font-size: 0.88rem;
    min-height: 46px;
  }

  /* Semester Selection */
  .sem-selection-section {
    padding: 24px 0 16px;
  }
  .sem-section-label {
    margin-bottom: 18px;
  }
  .semester-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .sem-card-inner {
    padding: 18px 16px;
  }

  /* Subjects View Controls */
  .subjects-view {
    padding-top: 14px;
  }
  .view-header-top {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .view-title-group h2 {
    font-size: 1.4rem;
  }
  .view-title-group p {
    font-size: 0.82rem;
  }
  .view-controls-bar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
  }
  .view-mode-toggle {
    display: inline-flex;
    gap: 2px;
    padding: 3px;
    background: var(--bg-surface);
    border: 1px solid var(--border-line);
    border-radius: var(--radius-pill);
    flex-shrink: 0;
  }
  .view-mode-btn {
    padding: 5px 10px;
    font-size: 0.74rem;
    min-height: 34px;
    border-radius: var(--radius-pill);
  }
  #changeSemBtn {
    padding: 5px 10px;
    font-size: 0.72rem;
    min-height: 34px;
    white-space: nowrap;
    max-width: 100%;
  }

  /* Subject Hub View Banner */
  .hub-banner {
    padding: 26px 16px 20px;
    margin: 0 -14px;
  }
  .hub-banner::after {
    display: none;
  }
  .hub-breadcrumbs {
    font-size: 0.76rem;
    gap: 6px;
    margin-bottom: 12px;
  }
  .hub-title-row {
    margin-bottom: 16px;
  }
  .hub-title-content h2 {
    font-size: clamp(1.5rem, 6vw, 2.2rem);
    line-height: 1.2;
    margin-bottom: 6px;
  }
  .hub-sub {
    font-size: 0.86rem;
    line-height: 1.45;
  }
  .hub-pills-row {
    gap: 6px;
    margin-bottom: 14px;
  }
  .hub-pill {
    padding: 4px 10px;
    font-size: 0.75rem;
  }
  .hub-action-btns-row {
    flex-direction: column;
    width: 100%;
    gap: 8px;
    margin: 12px 0 16px;
  }
  .hub-action-btn {
    width: 100%;
    justify-content: center;
    padding: 10px 16px;
    font-size: 0.84rem;
    min-height: 44px;
  }
  .hub-progress-card {
    padding: 10px 14px;
  }
  .progress-info-row {
    font-size: 0.78rem;
  }

  /* Sticky Hub Tabs */
  .hub-tabs-container {
    top: 56px;
    margin: 12px 0 0;
    padding: 4px;
    border-radius: 12px;
  }
  .hub-tabs {
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
  }
  .hub-tab-btn {
    padding: 8px 6px;
    font-size: 0.78rem;
    min-height: 42px;
    gap: 6px;
    border-radius: 8px;
  }
  .hub-tab-btn i {
    font-size: 0.88rem;
  }

  /* Filter Bar & Topic Jump Nav */
  .hub-filter-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin: 12px 0 10px;
  }
  .search-box-wrap {
    width: 100%;
    min-width: 0;
  }
  .search-input {
    min-height: 44px;
    font-size: 0.88rem;
  }
  .unit-filter-select {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    font-size: 0.86rem;
  }
  .topic-jump-nav {
    padding: 8px 12px;
    margin-bottom: 16px;
    border-radius: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
  }
  .jump-nav-title {
    font-size: 0.74rem;
  }
  .jump-chips-wrap {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
  }
  .jump-chip {
    flex-shrink: 0;
    padding: 4px 10px;
    font-size: 0.75rem;
    min-height: 32px;
  }

  /* Topics Tab */
  .topics-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .unit-card {
    padding: 16px 14px;
    border-radius: 14px;
  }
  .unit-card-header {
    gap: 10px;
    margin-bottom: 10px;
  }
  .unit-badge-number {
    width: 38px;
    height: 38px;
    font-size: 1rem;
    border-radius: 8px;
  }
  .unit-card-titles h4 {
    font-size: 1rem;
  }
  .unit-sub {
    font-size: 0.76rem;
  }
  .unit-maxim-box {
    margin: 10px 0 12px;
    padding: 9px 12px;
  }
  .unit-maxim-text {
    font-size: 0.86rem;
  }
  .unit-topics-list {
    margin: 8px 0 14px;
  }
  .unit-topics-list li {
    font-size: 0.82rem;
  }
  .unit-actions-row {
    flex-direction: row;
    gap: 8px;
    width: 100%;
  }
  .btn-read-notes.topic-liquid-metal-btn {
    flex: 1;
    min-height: 42px;
  }
  .btn-open-newtab {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
  }

  /* Landmark Cases Tab */
  .cases-list {
    gap: 16px;
  }
  .case-card {
    border-radius: 14px;
  }
  .case-card-header {
    padding: 12px 14px;
    gap: 8px;
  }
  .case-title-area h3 {
    font-size: 1.05rem;
  }
  .case-citation {
    font-size: 0.76rem;
  }
  .case-badge-actions {
    width: 100%;
    justify-content: space-between;
    margin-top: 4px;
  }
  .case-card-body {
    padding: 14px 14px;
  }
  .firac-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 10px;
  }
  .firac-box {
    padding: 12px 14px;
    font-size: 0.88rem;
    border-radius: 10px;
  }
  .case-extra-box {
    padding: 12px 14px;
    font-size: 0.86rem;
    border-radius: 10px;
    margin-bottom: 10px;
  }
  .case-footer-actions {
    width: 100%;
  }
  .btn-case-reader {
    width: 100%;
    justify-content: center;
    min-height: 44px;
  }

  /* PYQs Tab */
  .pyq-list {
    gap: 12px;
  }
  .pyq-card {
    border-radius: 14px;
  }
  .pyq-header {
    padding: 10px 12px;
    gap: 6px;
  }
  .pyq-body {
    padding: 14px 12px;
  }
  .pyq-question-text {
    font-size: 0.94rem;
    margin-bottom: 12px;
  }
  .model-ans-header {
    padding: 10px 12px;
    font-size: 0.8rem;
    min-height: 46px;
  }
  .model-ans-content {
    padding: 14px 12px;
    font-size: 0.88rem;
  }
  .model-ans-content table,
  .table-responsive table {
    min-width: 440px;
    font-size: 0.82rem;
  }
  .table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 10px 0;
    border: 1px solid var(--border-line);
    border-radius: 8px;
  }

  /* Revision Tab */
  .rev-card {
    padding: 16px 14px;
    border-radius: 14px;
  }
  .rev-card-header {
    gap: 8px;
  }
  .rev-card-title-area h3 {
    font-size: 1.15rem;
  }
  .rev-unit-subtitle {
    font-size: 0.82rem;
  }
  .rev-table-wrap {
    margin: 12px 0 16px;
    border-radius: 8px;
    -webkit-overflow-scrolling: touch;
  }
  .rev-table {
    min-width: 460px;
    font-size: 0.82rem;
  }
  .rev-table th {
    padding: 8px 10px;
    font-size: 0.76rem;
  }
  .rev-table td {
    padding: 9px 10px;
    font-size: 0.82rem;
  }
  .rev-exam-strategy,
  .rev-case-map {
    padding: 12px 14px;
    font-size: 0.84rem;
    margin: 10px 0;
  }

  /* Modals on Mobile: Full Screen */
  .flashcards-modal {
    padding: 0;
  }
  .flashcards-window {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    max-height: 100dvh;
    border-radius: 0;
    border: none;
  }
  .flashcards-header {
    padding: 12px 14px;
  }
  .flashcard-scene {
    padding: 12px 14px;
    min-height: 260px;
  }
  .flashcard {
    min-height: 260px;
  }
  .flashcard-face {
    padding: 14px 14px;
    border-radius: 12px;
  }
  .fc-case-name {
    font-size: 1.15rem;
    margin: 4px 0 10px;
  }
  .fc-ratio-text {
    font-size: 0.92rem;
  }
  .flashcards-bottom-bar {
    padding: 8px 14px;
    min-height: 52px;
  }
  .fc-shortcuts-hint {
    display: none !important;
  }
  .fc-btn-mastery {
    min-height: 44px;
  }

  .bare-act-drawer {
    width: 100vw;
    max-width: 100vw;
    right: -100vw;
  }
  .bare-act-drawer.open {
    right: 0;
  }
  .bare-act-drawer-header {
    padding: 12px 14px;
  }
  .bad-act-tabs {
    padding: 8px 12px;
  }
  .bad-search-wrap {
    padding: 8px 12px;
  }

  .bns-modal {
    top: 0;
    left: 0;
    transform: none !important;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    max-width: 100vw;
    max-height: 100dvh;
    border-radius: 0;
    border: none;
  }
  .bns-modal.active {
    transform: none !important;
  }
  .bns-modal-header {
    padding: 12px 14px;
  }
  .bns-modal-toolbar {
    padding: 10px 14px;
  }
  .bns-cards-container {
    padding: 12px 14px;
  }
  .bns-comp-body {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px 14px;
  }

  .mock-modal {
    inset: 0 !important;
    border-radius: 0;
    border: none;
  }
  .mock-header {
    padding: 10px 12px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .mock-crest-icon {
    font-size: 1.4rem;
  }
  .mock-header-text h2 {
    font-size: 0.98rem;
  }
  .mock-toolbar {
    padding: 10px 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .mock-subject-picker select {
    width: 100%;
    min-height: 42px;
  }
  .mock-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 6px;
  }
  .btn-mock-action {
    width: 100%;
    justify-content: center;
    min-height: 42px;
  }
  .mock-paper-content {
    padding: 12px 14px;
  }

  .bookmarks-drawer {
    width: 100vw;
    max-width: 100vw;
  }
  .bm-header {
    padding: 12px 14px;
  }
  .bm-list {
    padding: 12px 14px;
  }

  .mobile-bottom-nav {
    padding-bottom: env(safe-area-inset-bottom, 0px);
    height: calc(58px + env(safe-area-inset-bottom, 0px));
  }
  .mobile-bottom-nav.active {
    display: grid;
  }
}

@media (max-width: 480px) {
  .brand-text p {
    display: none;
  }
  .sub-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .hub-tab-btn span {
    font-size: 0.74rem;
  }
}

/* ==========================================================================
   SUBJECT-SPECIFIC THEMATIC DESIGNS & MOTIFS
   Each DU Law Course has its own visual atmosphere & academic identity
   ========================================================================== */

.hub-tags-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.hub-motto-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--sub-accent, #c9a84c);
  font-size: 0.74rem;
  font-weight: 700;
  font-style: italic;
  font-family: var(--font-serif);
  letter-spacing: 0.05em;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.sub-card-motto {
  font-family: var(--font-serif);
  font-size: 0.72rem;
  font-style: italic;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.sub-card-motto i {
  font-size: 0.68rem;
  color: var(--sub-accent, #c9a84c);
}

/* --------------------------------------------------------------------------
   1. JURISPRUDENCE (LB-106) — Classical Oxford Scholar & Scales of Justice
   -------------------------------------------------------------------------- */
[data-subject="juris"] .sub-card-banner::before,
body[data-active-subject="juris"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 85% 20%, rgba(201, 168, 76, 0.18) 0%, transparent 45%),
    linear-gradient(rgba(201, 168, 76, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 168, 76, 0.06) 1px, transparent 1px);
  background-size: auto, 36px 36px, 36px 36px;
  opacity: 0.85;
}

[data-subject="juris"]:hover {
  box-shadow: 0 20px 48px rgba(18, 30, 51, 0.28), 0 0 0 1px rgba(201, 168, 76, 0.35);
}

/* --------------------------------------------------------------------------
   2. LAW OF CONTRACT (LB-102) — Merchant Maritime & Wax Seal Covenant
   -------------------------------------------------------------------------- */
[data-subject="contract"] .sub-card-banner::before,
body[data-active-subject="contract"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 85% 80%, rgba(232, 118, 10, 0.18) 0%, transparent 45%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.035) 0, rgba(255, 255, 255, 0.035) 12px, transparent 12px, transparent 24px);
  opacity: 0.85;
}

[data-subject="contract"]:hover {
  box-shadow: 0 20px 48px rgba(6, 78, 78, 0.28), 0 0 0 1px rgba(232, 118, 10, 0.35);
}

/* --------------------------------------------------------------------------
   3. LAW OF CRIMES (LB-104) — Courtroom Obsidian & Criminal Docket Noir
   -------------------------------------------------------------------------- */
[data-subject="bns"] .sub-card-banner::before,
body[data-active-subject="bns"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 88% 25%, rgba(230, 57, 70, 0.22) 0%, transparent 50%),
    linear-gradient(rgba(255, 255, 255, 0.045) 2px, transparent 2px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 2px, transparent 2px);
  background-size: auto, 44px 44px, 44px 44px;
  opacity: 0.9;
}

[data-subject="bns"]:hover {
  box-shadow: 0 20px 48px rgba(101, 16, 22, 0.3), 0 0 0 1px rgba(230, 57, 70, 0.35);
}

/* --------------------------------------------------------------------------
   4. FAMILY LAW (LB-105) — Mughal Rose Maroon & Saptapadi Sacred Bond
   -------------------------------------------------------------------------- */
[data-subject="family"] .sub-card-banner::before,
body[data-active-subject="family"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 85% 20%, rgba(217, 119, 6, 0.22) 0%, transparent 50%),
    radial-gradient(circle at 15% 85%, rgba(131, 24, 67, 0.3) 0%, transparent 50%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0, rgba(255, 255, 255, 0.03) 8px, transparent 8px, transparent 28px);
  opacity: 0.9;
}

[data-subject="family"]:hover {
  box-shadow: 0 20px 48px rgba(111, 18, 54, 0.28), 0 0 0 1px rgba(217, 119, 6, 0.35);
}

/* --------------------------------------------------------------------------
   5. LAW OF TORTS (LB-103) — British Chancery Forest & Duty of Care
   -------------------------------------------------------------------------- */
[data-subject="torts"] .sub-card-banner::before,
body[data-active-subject="torts"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 85% 30%, rgba(2, 132, 199, 0.2) 0%, transparent 45%),
    linear-gradient(60deg, rgba(255, 255, 255, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(255, 255, 255, 0.03) 75.5%),
    linear-gradient(120deg, rgba(255, 255, 255, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(255, 255, 255, 0.03) 75.5%);
  background-size: auto, 40px 68px, 40px 68px;
  opacity: 0.9;
}

[data-subject="torts"]:hover {
  box-shadow: 0 20px 48px rgba(20, 69, 47, 0.28), 0 0 0 1px rgba(2, 132, 199, 0.35);
}

/* --------------------------------------------------------------------------
   AMBIENT HUB GLOW PER ACTIVE SUBJECT
   -------------------------------------------------------------------------- */
body[data-active-subject="juris"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(18, 30, 51, 0.04) 0%, transparent 70%);
}

body[data-active-subject="contract"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(6, 78, 78, 0.04) 0%, transparent 70%);
}

body[data-active-subject="bns"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(101, 16, 22, 0.04) 0%, transparent 70%);
}

body[data-active-subject="family"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(111, 18, 54, 0.04) 0%, transparent 70%);
}

body[data-active-subject="torts"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(20, 69, 47, 0.04) 0%, transparent 70%);
}


/* ==========================================================================
   COMPANY LAW (LB-303) — SEMESTER III THEME OVERRIDES
   ========================================================================== */
[data-subject="company"] .sub-card-banner::before,
body[data-active-subject="company"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 85% 30%, rgba(212, 163, 115, 0.22) 0%, transparent 45%),
    linear-gradient(60deg, rgba(255, 255, 255, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(255, 255, 255, 0.03) 75.5%),
    linear-gradient(120deg, rgba(255, 255, 255, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(255, 255, 255, 0.03) 75.5%);
  background-size: auto, 40px 68px, 40px 68px;
  opacity: 0.9;
}

[data-subject="company"]:hover {
  box-shadow: 0 20px 48px rgba(30, 58, 95, 0.28), 0 0 0 1px rgba(212, 163, 115, 0.35);
}

body[data-active-subject="company"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(30, 58, 95, 0.04) 0%, transparent 70%);
}

/* ==========================================================================
   MEDIA & LAW (LB-3031) — SEMESTER III THEME OVERRIDES
   ========================================================================== */
[data-subject="media"] .sub-card-banner::before,
body[data-active-subject="media"] .hub-banner::before {
  background-image:
    radial-gradient(circle at 85% 30%, rgba(14, 165, 233, 0.22) 0%, transparent 45%),
    linear-gradient(60deg, rgba(255, 255, 255, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(255, 255, 255, 0.03) 75.5%),
    linear-gradient(120deg, rgba(255, 255, 255, 0.03) 25%, transparent 25.5%, transparent 75%, rgba(255, 255, 255, 0.03) 75.5%);
  background-size: auto, 40px 68px, 40px 68px;
  opacity: 0.9;
}

[data-subject="media"]:hover {
  box-shadow: 0 20px 48px rgba(3, 105, 161, 0.28), 0 0 0 1px rgba(186, 230, 253, 0.35);
}

body[data-active-subject="media"] {
  background-image: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(3, 105, 161, 0.04) 0%, transparent 70%);
}

/* ==========================================================================
   LIQUID METAL HEADER NAVIGATION BUTTONS (VengeanceUI Liquid Metal)
   ========================================================================== */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.liquid-metal-btn,
.header-action-btn,
.header-actions .semester-badge-btn,
.header-actions .theme-toggle-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px 4px 5px;
  border-radius: 9999px;
  background: var(--metal-btn-bg, #ffffff);
  border: none;
  cursor: pointer;
  outline: none;
  user-select: none;
  text-decoration: none;
  box-sizing: border-box;
  min-height: 40px;
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s ease,
              background 0.2s ease;
  box-shadow: 0 6px 20px -4px var(--metal-shadow), 0 2px 6px rgba(0, 0, 0, 0.06);
  z-index: 1;
}

.liquid-metal-btn:active,
.header-action-btn:active,
.header-actions .semester-badge-btn:active,
.header-actions .theme-toggle-btn:active {
  transform: scale(0.97);
}

/* 3px Flowing Liquid Metal Outer Border (colorBack: #3b82f6, colorTint: #93c5fd) */
.liquid-metal-btn::before,
.header-action-btn::before,
.header-actions .semester-badge-btn::before,
.header-actions .theme-toggle-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 9999px;
  padding: 2.8px;
  background: linear-gradient(
    115deg,
    #1d4ed8 0%,
    #2563eb 15%,
    #3b82f6 30%,
    #93c5fd 46%,
    #ffffff 54%,
    #93c5fd 64%,
    #3b82f6 80%,
    #1d4ed8 100%
  );
  background-size: 260% 260%;
  animation: liquid-metal-flow 4.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 2;
  transition: filter 0.3s ease;
}

.liquid-metal-btn:hover::before,
.header-action-btn:hover::before,
.header-actions .semester-badge-btn:hover::before,
.header-actions .theme-toggle-btn:hover::before {
  animation-duration: 2s;
  filter: drop-shadow(0 0 7px rgba(147, 197, 253, 0.95)) brightness(1.22);
}

.liquid-metal-btn:hover,
.header-action-btn:hover,
.header-actions .semester-badge-btn:hover,
.header-actions .theme-toggle-btn:hover {
  box-shadow: 0 10px 28px -4px var(--metal-shadow-hover), 0 0 16px rgba(59, 130, 246, 0.35);
  background: var(--metal-btn-bg-hover, #f8fafc);
  transform: translateY(-1px);
}

@keyframes liquid-metal-flow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Dynamic Glossy Specular Light Sheen */
.liquid-metal-btn::after,
.header-action-btn::after,
.header-actions .semester-badge-btn::after,
.header-actions .theme-toggle-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 9999px;
  background: radial-gradient(
    circle 55px at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(255, 255, 255, 0.38),
    transparent 70%
  );
  opacity: 0;
  pointer-events: none;
  z-index: 3;
  transition: opacity 0.25s ease;
}

.liquid-metal-btn:hover::after,
.header-action-btn:hover::after,
.header-actions .semester-badge-btn:hover::after,
.header-actions .theme-toggle-btn:hover::after {
  opacity: 1;
}

/* Circular Inset Icon Badge */
.liquid-metal-btn .btn-icon-wrap,
.header-action-btn .btn-icon-wrap,
.header-action-btn > i:not(.arrow-down) {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--metal-icon-bg, #eff6ff);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s ease;
  line-height: 1;
}

.liquid-metal-btn:hover .btn-icon-wrap,
.header-action-btn:hover .btn-icon-wrap,
.header-action-btn:hover > i:not(.arrow-down) {
  transform: scale(1.08);
}

.liquid-metal-btn .btn-icon-wrap i,
.header-action-btn .btn-icon-wrap i,
.header-action-btn > i:not(.arrow-down) {
  font-size: 0.84rem;
  color: var(--metal-icon-color, #2563eb);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Tab Text Label */
.liquid-metal-btn .btn-lbl,
.header-action-btn .btn-lbl,
.header-actions .semester-badge-btn .btn-lbl {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--metal-text, #0f172a);
  white-space: nowrap;
}

/* Starred Badge Count */
.header-action-btn .badge-count,
.liquid-metal-btn .badge-count {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 9999px;
  margin-left: 3px;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.4);
}

/* Semester Selector Variant in Header */
.header-actions .semester-badge-btn {
  padding: 4px 14px 4px 12px;
  gap: 9px;
}

.header-actions .semester-badge-btn .sem-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
  animation: pulse-emerald 2s infinite;
  flex-shrink: 0;
}

@keyframes pulse-emerald {
  0%, 100% { box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25); }
  50% { box-shadow: 0 0 0 5px rgba(16, 185, 129, 0.1); }
}

.header-actions .semester-badge-btn i.arrow-down {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-left: 2px;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s ease;
}

.header-actions .semester-badge-btn:hover i.arrow-down {
  transform: translateY(1px);
}

/* ==========================================================================
   HEADER SEMESTER DROPDOWN MENU (Click & Hover Interactive)
   ========================================================================== */
.header-sem-dropdown-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.header-sem-dropdown-wrap:hover .header-actions .semester-badge-btn i.arrow-down,
.header-sem-dropdown-wrap.is-open .header-actions .semester-badge-btn i.arrow-down,
.header-sem-dropdown-wrap:hover i.arrow-down,
.header-sem-dropdown-wrap.is-open i.arrow-down {
  transform: rotate(180deg) !important;
  color: var(--du-gold) !important;
}

.sem-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 346px;
  max-width: min(360px, calc(100vw - 24px));
  background: rgba(255, 255, 255, 0.98);
  border: 1.5px solid rgba(201, 168, 76, 0.42);
  border-radius: 16px;
  box-shadow: 0 18px 45px -8px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(201, 168, 76, 0.18);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  overflow: hidden;
  z-index: 500;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.22s;
}

/* Hover bridge: smooth cursor path between badge and dropdown */
.sem-dropdown-menu::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

[data-theme="dark"] .sem-dropdown-menu {
  background: rgba(18, 15, 12, 0.97);
  border-color: rgba(201, 168, 76, 0.38);
  box-shadow: 0 24px 55px -10px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(201, 168, 76, 0.22);
}

.header-sem-dropdown-wrap:hover .sem-dropdown-menu,
.header-sem-dropdown-wrap.is-open .sem-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.sem-dd-header {
  padding: 12px 16px 10px;
  background: linear-gradient(180deg, rgba(201, 168, 76, 0.12) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sem-dd-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--du-gold);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sem-dd-sub {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 500;
}

.sem-dd-list {
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 480px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(201, 168, 76, 0.4) transparent;
}

.sem-dd-list::-webkit-scrollbar {
  width: 5px;
}

.sem-dd-list::-webkit-scrollbar-thumb {
  background: rgba(201, 168, 76, 0.4);
  border-radius: 9999px;
}

.sem-dd-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
  text-decoration: none;
  border: 1px solid transparent;
  user-select: none;
}

.sem-dd-item:hover {
  background: rgba(201, 168, 76, 0.1);
  border-color: rgba(201, 168, 76, 0.28);
  transform: translateX(3px);
}

[data-theme="dark"] .sem-dd-item:hover {
  background: rgba(201, 168, 76, 0.15);
  border-color: rgba(201, 168, 76, 0.35);
}

.sem-dd-item.is-selected {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(201, 168, 76, 0.14) 100%);
  border-color: rgba(201, 168, 76, 0.45);
}

.sem-dd-roman {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-family: var(--font-display, 'Playfair Display', Georgia, serif);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-line);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.sem-dd-item.active-sem .sem-dd-roman {
  background: linear-gradient(135deg, var(--du-crimson-deep) 0%, var(--du-crimson) 100%);
  color: #ffffff;
  border-color: rgba(201, 168, 76, 0.5);
  box-shadow: 0 2px 6px rgba(139, 26, 26, 0.25);
}

.sem-dd-item.is-selected .sem-dd-roman {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #ffffff;
  border-color: #93c5fd;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}

.sem-dd-info {
  flex: 1;
  min-width: 0;
}

.sem-dd-name-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sem-dd-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.sem-dd-curr-tag {
  font-size: 0.65rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.12);
  padding: 1px 7px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.sem-dd-term {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sem-dd-badge {
  font-weight: 600;
}

.sem-dd-badge.badge-active {
  color: #10b981;
}

.sem-dd-badge.badge-upcoming {
  color: #f59e0b;
}

.sem-dd-arrow {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 0.70rem;
  transition: transform 0.2s ease, color 0.2s ease;
  flex-shrink: 0;
}

.sem-dd-item:hover .sem-dd-arrow {
  transform: translateX(2px);
  color: var(--du-gold);
}

.sem-dd-footer {
  padding: 8px;
  border-top: 1px solid var(--border-line);
  background: var(--bg-subtle, rgba(0, 0, 0, 0.02));
}

.sem-dd-all-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  background: transparent;
  border: 1px dashed var(--border-line);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sem-dd-all-btn:hover {
  background: rgba(201, 168, 76, 0.12);
  border-color: var(--du-gold);
  color: var(--text-primary);
}

/* Theme Toggle Button in Header (Circular) */
.header-actions .theme-toggle-btn {
  width: 40px;
  height: 40px;
  padding: 0;
  justify-content: center;
  flex-shrink: 0;
}

.header-actions .theme-toggle-btn i {
  font-size: 0.95rem;
  color: var(--metal-icon-color, #2563eb);
  transition: transform 0.25s ease, color 0.2s ease;
}

.header-actions .theme-toggle-btn:hover i {
  transform: rotate(20deg) scale(1.12);
}

/* Header Telegram & Email Quick Action Buttons */
.header-actions .telegram-header-btn .telegram-wrap {
  background: rgba(34, 158, 217, 0.12);
}

.header-actions .telegram-header-btn .telegram-wrap i {
  color: #229ed9;
}

[data-theme="dark"] .header-actions .telegram-header-btn .telegram-wrap {
  background: rgba(34, 158, 217, 0.22);
}

[data-theme="dark"] .header-actions .telegram-header-btn .telegram-wrap i {
  color: #38bdf8;
}

.header-actions .telegram-header-btn::before {
  background: linear-gradient(
    115deg,
    #0284c7 0%,
    #0ea5e9 22%,
    #38bdf8 44%,
    #ffffff 54%,
    #38bdf8 64%,
    #0ea5e9 82%,
    #0284c7 100%
  );
  background-size: 260% 260%;
}

.header-actions .telegram-header-btn:hover {
  box-shadow: 0 10px 28px -4px rgba(34, 158, 217, 0.45), 0 0 16px rgba(34, 158, 217, 0.28);
}

.header-actions .email-header-btn .email-wrap {
  background: rgba(201, 168, 76, 0.15);
}

.header-actions .email-header-btn .email-wrap i {
  color: var(--du-crimson);
}

[data-theme="dark"] .header-actions .email-header-btn .email-wrap {
  background: rgba(201, 168, 76, 0.22);
}

[data-theme="dark"] .header-actions .email-header-btn .email-wrap i {
  color: #e5b869;
}

.header-actions .email-header-btn::before {
  background: linear-gradient(
    115deg,
    #8b1a1a 0%,
    #b45309 22%,
    #c9a84c 44%,
    #fef08a 54%,
    #c9a84c 64%,
    #8b1a1a 82%,
    #5c0f0f 100%
  );
  background-size: 260% 260%;
}

.header-actions .email-header-btn:hover {
  box-shadow: 0 10px 28px -4px rgba(201, 168, 76, 0.42), 0 0 16px rgba(201, 168, 76, 0.26);
}

/* Mobile Quick Tools Trigger */
.mobile-tools-trigger {
  display: none;
}

/* Mobile Responsive Collapse for Header */
@media (max-width: 768px) {
  .site-header {
    width: 100% !important;
    max-width: 100vw !important;
    overflow: hidden !important;
    box-sizing: border-box !important;
  }
  .header-inner {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 0 10px !important;
    gap: 6px !important;
  }
  .brand-wrap {
    gap: 7px;
    min-width: 0;
    flex-shrink: 1;
  }
  .brand-crest {
    width: 34px;
    height: 34px;
    font-size: 16px;
    flex-shrink: 0;
  }
  .brand-text h1 {
    font-size: 0.92rem;
    white-space: nowrap;
    line-height: 1.1;
    margin: 0;
  }
  .brand-text h1 span {
    display: none !important;
  }
  .brand-text p {
    display: none !important;
  }
  .header-actions {
    gap: 4px !important;
    flex-shrink: 0;
  }
  /* Hide desktop-only tool buttons on mobile, unified into Quick Tools menu */
  #headerMockExamBtn,
  #headerBnsConverterBtn,
  #headerBareActBtn,
  #headerFlashcardBtn {
    display: none !important;
  }
  .mobile-tools-trigger {
    display: inline-flex !important;
    padding: 0 !important;
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    min-height: 32px !important;
    justify-content: center;
    background: linear-gradient(135deg, rgba(201, 168, 76, 0.18), rgba(201, 168, 76, 0.08)) !important;
    border-color: rgba(201, 168, 76, 0.5) !important;
    color: var(--du-gold) !important;
    flex-shrink: 0 !important;
  }
  .mobile-tools-trigger .btn-lbl {
    display: none !important;
  }
  .mobile-tools-trigger .btn-icon-wrap {
    width: 24px !important;
    height: 24px !important;
    background: transparent !important;
    box-shadow: none !important;
  }
  .mobile-tools-trigger i {
    color: #e5b869 !important;
    font-size: 0.85rem !important;
  }
  #headerBookmarksBtn.liquid-metal-btn {
    display: inline-flex !important;
    padding: 0 !important;
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    min-height: 32px !important;
    justify-content: center;
    position: relative;
    flex-shrink: 0 !important;
  }
  #headerBookmarksBtn.liquid-metal-btn .btn-lbl {
    display: none !important;
  }
  #headerBookmarksBtn.liquid-metal-btn .btn-icon-wrap {
    width: 24px !important;
    height: 24px !important;
    background: transparent !important;
    box-shadow: none !important;
  }
  #headerBookmarksBtn.liquid-metal-btn i {
    font-size: 0.85rem !important;
  }
  #headerBookmarksBtn.liquid-metal-btn .badge-count {
    position: absolute;
    top: -3px;
    right: -3px;
    margin-left: 0;
    font-size: 0.58rem;
    padding: 1px 4px;
  }
  .header-actions .header-contact-pill,
  .header-actions .telegram-header-btn,
  .header-actions .email-header-btn,
  .header-actions .contact-header-btn {
    width: 32px !important;
    min-width: 32px !important;
    height: 32px !important;
    min-height: 32px !important;
    padding: 0 !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
  }
  .header-actions .header-contact-pill .btn-icon-wrap,
  .header-actions .telegram-header-btn .btn-icon-wrap,
  .header-actions .email-header-btn .btn-icon-wrap,
  .header-actions .contact-header-btn .btn-icon-wrap {
    width: 24px !important;
    height: 24px !important;
    background: transparent !important;
    box-shadow: none !important;
  }
  .header-actions .header-contact-pill .btn-icon-wrap i,
  .header-actions .telegram-header-btn .btn-icon-wrap i,
  .header-actions .email-header-btn .btn-icon-wrap i,
  .header-actions .contact-header-btn .btn-icon-wrap i {
    font-size: 0.85rem !important;
  }
  .header-actions .header-contact-pill .btn-lbl,
  .header-actions .telegram-header-btn .btn-lbl,
  .header-actions .email-header-btn .btn-lbl,
  .header-actions .contact-header-btn .btn-lbl {
    display: none !important;
  }
  .header-actions .semester-badge-btn {
    padding: 2px 7px !important;
    font-size: 0.70rem !important;
    min-height: 32px !important;
    height: 32px !important;
    max-width: 76px !important;
    gap: 3px !important;
    flex-shrink: 1 !important;
  }
  .header-actions .semester-badge-btn .btn-lbl {
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
    min-width: 0 !important;
    font-size: 0.70rem !important;
  }
  .header-actions .semester-badge-btn .sem-indicator {
    width: 6px !important;
    height: 6px !important;
    min-width: 6px !important;
    flex-shrink: 0 !important;
  }
  .header-actions .semester-badge-btn i.arrow-down {
    display: inline-block !important;
    font-size: 0.54rem !important;
  }
  .sem-dropdown-menu {
    right: -42px !important;
    max-width: calc(100vw - 20px) !important;
  }
  .header-actions .theme-toggle-btn {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    min-height: 32px !important;
    font-size: 0.85rem !important;
    padding: 0 !important;
    flex-shrink: 0 !important;
  }
}

/* ==========================================================================
   MOBILE QUICK TOOLS DRAWER & BOTTOM SHEET
   ========================================================================== */
.mobile-tools-overlay {
  position: fixed;
  inset: 0;
  background: rgba(14, 12, 9, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1300;
  opacity: 0;
  visibility: hidden;
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-tools-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-tools-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 85vh;
  max-height: 85dvh;
  background: var(--bg-card, #ffffff);
  border-top-left-radius: 24px;
  border-top-right-radius: 24px;
  border-top: 2px solid var(--du-gold, #c9a84c);
  box-shadow: 0 -12px 48px rgba(0, 0, 0, 0.4);
  z-index: 1310;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.35s;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  visibility: hidden;
  pointer-events: none;
}

.mobile-tools-drawer.active {
  transform: translateY(0);
  visibility: visible;
  pointer-events: auto;
}

.mtd-header {
  padding: 16px 20px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line, #e2e8f0);
  background: var(--sub-bg-tint, #f8fafc);
}

.mtd-title-box {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mtd-crest {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--sub-primary-dark, #0e1b30), var(--sub-primary, #1a2a4a));
  color: var(--du-gold, #c9a84c);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.mtd-title-box h3 {
  font-family: var(--font-display, Georgia, serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.mtd-title-box p {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin: 2px 0 0;
}

.mtd-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-line);
  background: var(--bg-surface);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
}

.mtd-close-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
}

.mtd-body {
  padding: 16px 18px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mtd-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mtd-action-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--bg-surface, #f8fafc);
  border: 1.5px solid var(--border-line, #e2e8f0);
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.mtd-action-card:hover,
.mtd-action-card:active {
  background: var(--bg-card);
  border-color: var(--du-gold);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.mtd-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.mtd-card-icon.mock {
  background: #eff6ff; color: #2563eb;
}
.mtd-card-icon.bns {
  background: #fef3c7; color: #b45309;
}
.mtd-card-icon.bareact {
  background: #f0fdf4; color: #16a34a;
}
.mtd-card-icon.flashcard {
  background: #fae8ff; color: #a21caf;
}
.mtd-card-icon.star {
  background: #fefce8; color: #ca8a04;
}
.mtd-card-icon.semester {
  background: #f1f5f9; color: #475569;
}

[data-theme="dark"] .mtd-card-icon.mock { background: #1e3a8a; color: #93c5fd; }
[data-theme="dark"] .mtd-card-icon.bns { background: #78350f; color: #fde68a; }
[data-theme="dark"] .mtd-card-icon.bareact { background: #14532d; color: #86efac; }
[data-theme="dark"] .mtd-card-icon.flashcard { background: #581c87; color: #f0abfc; }
[data-theme="dark"] .mtd-card-icon.star { background: #713f12; color: #fef08a; }
[data-theme="dark"] .mtd-card-icon.semester { background: #334155; color: #cbd5e1; }

.mtd-card-text {
  flex: 1;
  min-width: 0;
}

.mtd-card-text h4 {
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 2px;
}

.mtd-card-text p {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mtd-arrow {
  font-size: 0.8rem;
  color: var(--text-faint);
  transition: transform 0.2s;
}

.mtd-action-card:hover .mtd-arrow {
  transform: translateX(3px);
  color: var(--du-gold);
}

/* ==========================================================================
   HUB BANNER ACTION BUTTONS ROW
   ========================================================================== */
.hub-action-btns-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 18px;
}

.hub-action-btn{
  position:relative;display:inline-flex;align-items:center;border-radius:9999px;border:none;background:transparent;
  padding:3px;cursor:pointer;outline:none;user-select:none;box-sizing:border-box;text-decoration:none;
  transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .25s ease;
  box-shadow:0 6px 20px -3px rgba(0,0,0,.25);
}
.hub-action-btn:active{transform:scale(.98)}
.hub-action-btn::before{
  content:"";position:absolute;inset:0;border-radius:9999px;padding:3px;
  background:linear-gradient(115deg,#1d4ed8 0%,#2563eb 15%,#3b82f6 30%,#93c5fd 46%,#ffffff 54%,#93c5fd 64%,#3b82f6 80%,#1d4ed8 100%);
  background-size:260% 260%;animation:liquid-metal-flow 4.2s cubic-bezier(.4,0,.2,1) infinite;
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:2;transition:filter .3s ease;
}
.hub-action-btn:hover::before{
  animation-duration:2s;filter:drop-shadow(0 0 8px rgba(147,197,253,.95)) brightness(1.2);
}
.hub-action-btn:hover{
  box-shadow:0 10px 30px -4px rgba(37,99,235,.45),0 0 16px rgba(59,130,246,.3);transform:translateY(-1px);
}
.hub-action-btn::after{
  content:"";position:absolute;inset:0;border-radius:9999px;
  background:radial-gradient(circle 60px at var(--mouse-x,50%) var(--mouse-y,50%),rgba(255,255,255,.5),transparent 70%);
  opacity:0;pointer-events:none;z-index:3;transition:opacity .25s ease;
}
.hub-action-btn:hover::after{opacity:1}
.hub-action-btn .metal-inner-body{
  position:relative;z-index:1;display:flex;align-items:center;gap:10px;
  padding:5px 18px 5px 6px;border-radius:9999px;background:rgba(14,27,48,.85);backdrop-filter:blur(10px);
  color:#ffffff;transition:background .2s ease;
}
.hub-action-btn:hover .metal-inner-body{background:rgba(14,27,48,.95)}
.hub-action-btn .metal-icon-circle{
  width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(59,130,246,.25);box-shadow:inset 0 2px 4px rgba(0,0,0,.25);flex-shrink:0;
  transition:transform .22s cubic-bezier(.16,1,.3,1);
}
.hub-action-btn:hover .metal-icon-circle{transform:scale(1.1)}
.hub-action-btn .metal-icon-circle i{font-size:.92rem;color:#93c5fd}
.hub-action-btn .metal-btn-lbl{
  font-family:'Inter',sans-serif;font-size:.88rem;font-weight:700;letter-spacing:-.01em;color:#ffffff;white-space:nowrap;
}

/* ==========================================================================
   CASES TAB FLASHCARD DRILL BANNER
   ========================================================================== */
.cases-flashcard-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 24px;
  background: linear-gradient(135deg, var(--card-bg, #ffffff) 0%, var(--bg-tint, #f5f7fa) 100%);
  border: 1px solid var(--border-color, #d0d8e5);
  border-left: 5px solid var(--primary, #183059);
  border-radius: 12px;
  margin-bottom: 24px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}

.cfb-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cfb-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--badge-bg, #e9eef8);
  color: var(--primary, #183059);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.cfb-text h4 {
  font-family: 'Playfair Display', serif;
  font-size: 1.12rem;
  margin: 0 0 4px;
  color: var(--text-color, #1a202c);
}

.cfb-text p {
  font-size: 0.86rem;
  margin: 0;
  color: var(--text-muted, #64748b);
  line-height: 1.45;
}

.cfb-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 20px;
  border-radius: 24px;
  background: var(--primary, #183059);
  color: #ffffff;
  border: none;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.22s ease;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.cfb-btn:hover {
  background: var(--primary-dark, #0e1f3d);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

@media (max-width: 768px) {
  .cases-flashcard-banner {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
    padding: 16px;
  }
  .cfb-btn {
    justify-content: center;
  }
}

/* ==========================================================================
   STATUTORY BARE ACT SECTION HYPERLINKS IN MODEL ANSWERS
   ========================================================================== */
.bare-act-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 7px;
  margin: 0 2px;
  border-radius: 4px;
  background: rgba(24, 48, 89, 0.07);
  color: var(--primary, #183059);
  font-weight: 600;
  font-size: 0.9em;
  text-decoration: underline dotted var(--accent, #c59b27);
  text-underline-offset: 3px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.bare-act-link i {
  font-size: 0.78em;
  color: var(--accent, #c59b27);
}

.bare-act-link:hover {
  background: var(--primary, #183059);
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(24, 48, 89, 0.18);
}

.bare-act-link:hover i {
  color: var(--accent-light, #f6eedb);
}

/* ==========================================================================
   PRECEDENT RECALL FLASHCARDS MODAL (3D Flip Deck)
   ========================================================================== */
.flashcards-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(14, 31, 61, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.28s ease;
}

.flashcards-modal.active {
  display: flex;
  opacity: 1;
}

body.modal-open {
  overflow: hidden;
}

.flashcards-window {
  width: min(720px, 94vw);
  max-height: 90vh;
  background: var(--card-bg, #ffffff);
  border-radius: 20px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  animation: fcPopIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fcPopIn {
  from {
    transform: scale(0.94) translateY(12px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.flashcards-header {
  padding: 16px 24px;
  background: var(--bg-tint, #f5f7fa);
  border-bottom: 1px solid var(--border-color, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flashcards-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--primary, #183059);
  background: var(--badge-bg, #e9eef8);
  padding: 3px 9px;
  border-radius: 12px;
  margin-bottom: 4px;
}

.flashcards-title-box h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem;
  margin: 0;
  color: var(--text-color, #1a202c);
}

.flashcards-title-box p {
  font-size: 0.82rem;
  margin: 2px 0 0;
  color: var(--text-muted, #64748b);
}

.flashcards-controls-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-fc-tool {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 20px;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-color, #334155);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-fc-tool:hover {
  border-color: var(--primary, #183059);
  color: var(--primary, #183059);
}

.btn-fc-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--card-bg, #ffffff);
  color: var(--text-muted, #64748b);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.btn-fc-close:hover {
  background: #f87171;
  color: #ffffff;
  transform: rotate(90deg);
}

.flashcards-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border-color, #e2e8f0);
}

.fc-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent, #c59b27), var(--primary, #183059));
  transition: width 0.3s ease;
}

/* 3D Scene */
.flashcard-scene {
  perspective: 1200px;
  padding: 24px;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  min-height: 400px;
  background: var(--bg-color, #fafbfd);
}

.flashcard {
  width: 100%;
  min-height: 380px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
  border-radius: 16px;
}

.flashcard.is-flipped {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.04);
  overflow-y: auto;
}

/* Front Face */
.flashcard-front {
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
}

.fc-face-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.fc-chip {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--badge-bg, #e9eef8);
  color: var(--primary, #183059);
}

.fc-chip.precedent {
  background: #ecfdf5;
  color: #065f46;
}

.fc-hint-tag {
  font-size: 0.78rem;
  color: var(--accent, #c59b27);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.fc-face-body {
  flex: 1;
}

.fc-prompt-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-light, #fef3c7);
  color: var(--accent, #d97706);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.fc-prompt-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.32rem;
  color: var(--text-color, #1a202c);
  margin: 0 0 16px;
  font-style: italic;
}

.fc-dilemma-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted, #64748b);
  margin-bottom: 4px;
}

.fc-dilemma-text,
.fc-issue-text {
  font-family: 'EB Garamond', serif;
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--text-color, #1e293b);
  margin: 0 0 14px;
}

.fc-issue-box {
  background: var(--bg-tint, #f8fafc);
  border-left: 3px solid var(--accent, #c59b27);
  padding: 10px 14px;
  border-radius: 0 8px 8px 0;
}

.fc-face-footer {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color, #f1f5f9);
}

.fc-flip-instruction {
  font-size: 0.82rem;
  color: var(--text-muted, #64748b);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.fc-flip-instruction b {
  color: var(--primary, #183059);
}

/* Back Face */
.flashcard-back {
  background: linear-gradient(145deg, var(--card-bg, #ffffff) 0%, #fdfbf7 100%);
  border: 2px solid var(--accent, #c59b27);
  transform: rotateY(180deg);
}

.fc-cite-badge {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted, #64748b);
  background: rgba(0, 0, 0, 0.04);
  padding: 3px 8px;
  border-radius: 6px;
}

.fc-landmark-tag {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent, #c59b27);
}

.fc-case-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary, #183059);
  margin: 4px 0 16px;
}

.fc-ratio-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-left: 4px solid #16a34a;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 12px;
}

.fc-ratio-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #15803d;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.fc-ratio-text {
  font-family: 'EB Garamond', serif;
  font-size: 1.08rem;
  line-height: 1.55;
  color: #14532d;
  margin: 0;
}

.fc-exam-tip-box {
  background: #fffbeb;
  border: 1px solid #fef3c7;
  border-left: 4px solid #f59e0b;
  border-radius: 8px;
  padding: 10px 14px;
}

.fc-exam-tip-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #b45309;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.fc-exam-tip-text {
  font-size: 0.86rem;
  line-height: 1.45;
  color: #78350f;
  margin: 0;
}

.fc-mastery-actions {
  display: flex;
  gap: 12px;
}

.fc-btn-mastery {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border-radius: 10px;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.fc-btn-mastery.review {
  background: #fee2e2;
  color: #b91c1c;
}

.fc-btn-mastery.review:hover,
.fc-btn-mastery.review.active {
  background: #ef4444;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.fc-btn-mastery.mastered {
  background: #dcfce7;
  color: #15803d;
}

.fc-btn-mastery.mastered:hover,
.fc-btn-mastery.mastered.active {
  background: #22c55e;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

/* Flashcards Footer & Nav */
.flashcards-bottom-bar {
  padding: 14px 24px;
  background: var(--bg-tint, #f5f7fa);
  border-top: 1px solid var(--border-color, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fc-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 20px;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  font-family: 'Inter', sans-serif;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-color, #1e293b);
  cursor: pointer;
  transition: all 0.2s;
}

.fc-nav-btn:hover {
  background: var(--primary, #183059);
  color: #ffffff;
  border-color: var(--primary, #183059);
}

.fc-counter-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fc-counter-text {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-color, #1a202c);
}

.fc-mastery-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: #15803d;
  background: #dcfce7;
  padding: 3px 8px;
  border-radius: 12px;
}

.fc-shortcuts-hint {
  padding: 8px 24px;
  background: var(--card-bg, #ffffff);
  border-top: 1px solid var(--border-color, #f1f5f9);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 0.74rem;
  color: var(--text-muted, #94a3b8);
}

.fc-shortcuts-hint kbd {
  background: var(--bg-tint, #f1f5f9);
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 1px 5px;
  font-family: monospace;
  font-size: 0.8em;
  color: var(--text-color, #334155);
}

/* ==========================================================================
   QUICK BARE ACT DRAWER (Instant Statutory Reference)
   ========================================================================== */
.bare-act-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(14, 31, 61, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1040;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.bare-act-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

body.drawer-open {
  overflow: hidden;
}

.bare-act-drawer {
  position: fixed;
  top: 0;
  right: -620px;
  width: min(580px, 94vw);
  height: 100vh;
  background: var(--card-bg, #ffffff);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.22);
  transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.35s;
  border-left: 1px solid var(--border-color, #d0d8e5);
  visibility: hidden;
  pointer-events: none;
}

.bare-act-drawer.open {
  right: 0;
  visibility: visible;
  pointer-events: auto;
}

.bare-act-drawer-header {
  padding: 18px 22px;
  background: var(--bg-tint, #f5f7fa);
  border-bottom: 1px solid var(--border-color, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bad-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bad-crest {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary, #183059);
  color: var(--accent, #c59b27);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.bad-title-group h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem;
  margin: 0;
  color: var(--text-color, #1a202c);
}

.bad-title-group p {
  font-size: 0.78rem;
  margin: 2px 0 0;
  color: var(--text-muted, #64748b);
}

.bad-close-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: var(--card-bg, #ffffff);
  color: var(--text-muted, #64748b);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 5px rgba(0,0,0,0.06);
}

.bad-close-btn:hover {
  background: #f87171;
  color: #ffffff;
  transform: rotate(90deg);
}

/* Act Tabs */
.bad-act-tabs {
  display: flex;
  gap: 6px;
  padding: 10px 18px;
  background: var(--card-bg, #ffffff);
  border-bottom: 1px solid var(--border-color, #f1f5f9);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.bad-act-tabs::-webkit-scrollbar {
  height: 3px;
}

.bad-act-tabs::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}

.bad-tab {
  padding: 6px 12px;
  border-radius: 16px;
  background: var(--bg-tint, #f1f5f9);
  color: var(--text-muted, #475569);
  border: 1px solid transparent;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.bad-tab:hover {
  background: #e2e8f0;
  color: var(--text-color, #1e293b);
}

.bad-tab.active {
  background: var(--primary, #183059);
  color: #ffffff;
}

/* Search Box */
.bad-search-wrap {
  position: relative;
  padding: 12px 18px;
  background: var(--bg-tint, #f8fafc);
  border-bottom: 1px solid var(--border-color, #e2e8f0);
}

.bad-search-wrap i {
  position: absolute;
  left: 30px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted, #94a3b8);
  font-size: 0.9rem;
}

.bad-search-wrap input {
  width: 100%;
  padding: 9px 34px 9px 34px;
  border-radius: 20px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--card-bg, #ffffff);
  color: var(--text-color, #1e293b);
  font-family: 'Inter', sans-serif;
  font-size: 0.86rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.bad-search-wrap input:focus {
  border-color: var(--primary, #183059);
  box-shadow: 0 0 0 3px rgba(24, 48, 89, 0.12);
}

.bad-search-clear {
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
  padding: 4px;
  font-size: 0.85rem;
}

.bad-search-clear:hover {
  color: var(--text-color, #1e293b);
}

/* List Container */
.bad-list-container {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Section Card */
.bad-section-card {
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 12px;
  background: var(--card-bg, #ffffff);
  overflow: hidden;
  transition: all 0.24s cubic-bezier(0.16, 1, 0.3, 1);
}

.bad-section-card:hover {
  border-color: var(--primary-light, #2b4d82);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.bad-section-card.highlighted {
  border-color: var(--accent, #c59b27);
  box-shadow: 0 0 0 3px rgba(197, 155, 39, 0.22);
}

.bad-card-header {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  background: var(--card-bg, #ffffff);
  transition: background 0.2s;
}

.bad-section-card.open .bad-card-header {
  background: var(--bg-tint, #f8fafc);
  border-bottom: 1px solid var(--border-color, #f1f5f9);
}

.bad-card-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.bad-act-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary, #183059);
  background: var(--badge-bg, #e9eef8);
  padding: 2px 7px;
  border-radius: 6px;
  white-space: nowrap;
}

.bad-sec-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-color, #1a202c);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bad-sec-title span {
  font-weight: 400;
  color: var(--text-muted, #64748b);
}

.bad-chevron {
  font-size: 0.82rem;
  color: var(--text-muted, #94a3b8);
  transition: transform 0.25s ease;
}

.bad-section-card.open .bad-chevron {
  transform: rotate(180deg);
  color: var(--primary, #183059);
}

/* Card Body (Accordion) */
.bad-card-body {
  display: none;
  padding: 16px;
}

.bad-section-card.open .bad-card-body {
  display: block;
  animation: badFade 0.25s ease;
}

@keyframes badFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.bad-box-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted, #64748b);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.bad-statutory-box {
  background: var(--bg-tint, #f8fafc);
  border: 1px solid var(--border-color, #e2e8f0);
  border-left: 4px solid var(--primary, #183059);
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 12px;
}

.bad-statutory-text {
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-color, #1e293b);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.bad-analysis-box {
  background: #fffbeb;
  border: 1px solid #fef3c7;
  border-left: 4px solid var(--accent, #d97706);
  border-radius: 6px;
  padding: 10px 14px;
  margin-bottom: 14px;
}

.bad-analysis-box .bad-box-label {
  color: #b45309;
}

.bad-analysis-text {
  font-size: 0.86rem;
  line-height: 1.5;
  color: #78350f;
  margin: 0;
}

.bad-card-actions {
  display: flex;
  gap: 8px;
}

.bad-btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 16px;
  background: var(--bg-tint, #f1f5f9);
  border: 1px solid var(--border-color, #cbd5e1);
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-color, #334155);
  cursor: pointer;
  transition: all 0.18s;
}

.bad-btn-action:hover {
  background: var(--primary, #183059);
  color: #ffffff;
  border-color: var(--primary, #183059);
}

/* Clear search button in empty state */
.btn-clear-search {
  margin-top: 10px;
  padding: 6px 16px;
  border-radius: 16px;
  background: var(--primary, #183059);
  color: #ffffff;
  border: none;
  font-size: 0.82rem;
  cursor: pointer;
}

/* ===================================================================
   NEW PRODUCTION FEATURES: BNS CONVERTER, MOCK EXAM, AUDIO, BOOKMARKS
   =================================================================== */

.header-action-btn .badge-count {
  background: #dc2626;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 10px;
  margin-left: 4px;
}

.card-quick-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-card-star, .btn-card-note, .btn-card-audio {
  background: transparent;
  border: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-muted, #64748b);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-card-star:hover {
  color: #eab308;
  border-color: #eab308;
  background: rgba(234, 179, 8, 0.1);
}

.btn-card-star.starred {
  color: #eab308;
  border-color: #eab308;
  background: rgba(234, 179, 8, 0.15);
  font-weight: 700;
}

.btn-card-note:hover, .btn-card-note.has-note {
  color: #2563eb;
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.1);
}

.btn-card-audio:hover {
  color: #059669;
  border-color: #059669;
  background: rgba(5, 150, 105, 0.1);
}

.personal-card-note {
  margin-top: 10px;
  padding: 8px 12px;
  background: #fef9c3;
  border-left: 4px solid #ca8a04;
  border-radius: 4px;
  font-size: 0.82rem;
  color: #713f12;
  font-style: italic;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

[data-theme="dark"] .personal-card-note {
  background: #3f2c00;
  border-left-color: #eab308;
  color: #fef08a;
}

.personal-card-note .btn-delete-note {
  background: none;
  border: none;
  color: #991b1b;
  cursor: pointer;
  font-size: 0.8rem;
  padding: 2px 6px;
}

/* Floating Audio Player (Metro Mode - Disabled) */
.floating-audio-bar,
.btn-card-audio {
  display: none !important;
}

.floating-audio-bar {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(140%);
  background: var(--bg-card, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border-radius: 30px;
  padding: 8px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 1050;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 90vw;
  width: 480px;
}

.floating-audio-bar.active {
  transform: translateX(-50%) translateY(0);
}

.audio-pulse-icon {
  color: #059669;
  font-size: 1.1rem;
  animation: audioPulse 1.2s infinite alternate;
}

@keyframes audioPulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  100% { transform: scale(1.15); opacity: 1; }
}

.audio-info {
  flex: 1;
  overflow: hidden;
}

.audio-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-color, #0f172a);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.audio-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted, #64748b);
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.audio-ctrl-btn {
  background: var(--bg-tint, #f1f5f9);
  border: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-color, #0f172a);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}

.audio-ctrl-btn:hover {
  background: var(--primary, #183059);
  color: #ffffff;
}

.audio-speed-btn {
  background: var(--bg-tint, #f1f5f9);
  border: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-color, #0f172a);
  border-radius: 14px;
  padding: 4px 8px;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
}

/* BNS ↔ IPC Converter Modal */
.bns-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s;
}

.bns-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.bns-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: 95vw;
  max-width: 960px;
  max-height: 90vh;
  background: var(--bg-card, #ffffff);
  border-radius: 16px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
  z-index: 1110;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  border: 1px solid var(--border-color, #cbd5e1);
}

.bns-modal.active {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
  visibility: visible;
}

.bns-modal-header {
  padding: 16px 24px;
  background: linear-gradient(135deg, #183059, #0f172a);
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #ca8a04;
}

.bns-header-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bns-header-title i {
  font-size: 1.5rem;
  color: #eab308;
}

.bns-header-title h3 {
  margin: 0;
  font-size: 1.15rem;
  font-family: "Playfair Display", serif;
  font-weight: 700;
}

.bns-header-title p {
  margin: 2px 0 0;
  font-size: 0.78rem;
  opacity: 0.85;
}

.bns-close-btn {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.bns-modal-toolbar {
  padding: 14px 24px;
  background: var(--bg-tint, #f8fafc);
  border-bottom: 1px solid var(--border-color, #cbd5e1);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bns-search-input-wrap {
  position: relative;
  width: 100%;
}

.bns-search-input-wrap i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted, #64748b);
}

.bns-search-input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-card, #ffffff);
  color: var(--text-color, #0f172a);
  font-size: 0.88rem;
}

.bns-category-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.bns-pill {
  background: var(--bg-card, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-color, #334155);
  padding: 4px 12px;
  border-radius: 14px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.bns-pill.active {
  background: var(--primary, #183059);
  color: #ffffff;
  border-color: var(--primary, #183059);
}

.bns-cards-container {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.bns-comp-card {
  background: var(--bg-card, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.bns-comp-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  background: var(--bg-tint, #f1f5f9);
  border-bottom: 1px solid var(--border-color, #cbd5e1);
}

.bns-comp-offense {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-color, #0f172a);
}

.bns-comp-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background: #dbeafe;
  color: #1e40af;
}

.bns-comp-badge.new-prov {
  background: #fef3c7;
  color: #92400e;
}

.bns-comp-body {
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .bns-comp-body {
    grid-template-columns: 1fr;
  }
}

.bns-section-box {
  padding: 12px;
  border-radius: 8px;
  background: var(--bg-tint, #f8fafc);
  border: 1px solid var(--border-color, #e2e8f0);
}

.bns-section-box.bns-side {
  border-left: 4px solid #16a34a;
}

.bns-section-box.ipc-side {
  border-left: 4px solid #dc2626;
}

.bns-sec-tag {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.bns-side .bns-sec-tag { color: #16a34a; }
.ipc-side .bns-sec-tag { color: #dc2626; }

.bns-sec-num {
  font-size: 1.1rem;
  font-weight: 800;
  font-family: "Playfair Display", serif;
  color: var(--text-color, #0f172a);
}

.bns-comp-footer {
  padding: 12px 18px;
  background: var(--bg-card, #ffffff);
  border-top: 1px dashed var(--border-color, #cbd5e1);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bns-changes-text {
  font-size: 0.84rem;
  color: var(--text-color, #334155);
  line-height: 1.5;
}

.bns-precedents-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-muted, #64748b);
}

.bns-case-tag {
  background: var(--bg-tint, #e2e8f0);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--text-color, #1e293b);
  font-weight: 600;
}

.bns-exam-tip {
  padding: 8px 12px;
  background: #eff6ff;
  border-left: 3px solid #3b82f6;
  border-radius: 4px;
  font-size: 0.8rem;
  color: #1e40af;
}

[data-theme="dark"] .bns-exam-tip {
  background: #172554;
  color: #93c5fd;
}

/* DU Mock Exam Simulator Modal */
.mock-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(5px);
  z-index: 1200;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s;
}

.mock-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mock-modal {
  position: fixed;
  inset: 20px;
  background: var(--bg-card, #ffffff);
  border-radius: 16px;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.4);
  z-index: 1210;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s;
  overflow: hidden;
  border: 2px solid #ca8a04;
}

.mock-modal.active {
  opacity: 1;
  visibility: visible;
}

.mock-header {
  padding: 16px 24px;
  background: linear-gradient(135deg, #183059, #0f172a);
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #ca8a04;
}

.mock-header-crest {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mock-crest-icon {
  font-size: 2rem;
  color: #eab308;
}

.mock-header-text h2 {
  font-size: 1.25rem;
  font-family: "Playfair Display", serif;
  margin: 0;
  color: #fff;
}

.mock-header-text p {
  margin: 3px 0 0;
  font-size: 0.78rem;
  color: #e2e8f0;
}

.mock-timer-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 0, 0, 0.35);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid #eab308;
}

.mock-timer-clock {
  font-family: "Courier New", monospace;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fde047;
}

.mock-timer-clock.warning {
  color: #ef4444;
}

.mock-toolbar {
  padding: 12px 24px;
  background: var(--bg-tint, #f8fafc);
  border-bottom: 1px solid var(--border-color, #cbd5e1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.mock-subject-picker select {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-card, #ffffff);
  color: var(--text-color, #0f172a);
  font-weight: 600;
  font-size: 0.85rem;
}

.mock-selection-counter {
  font-size: 0.88rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  background: #f1f5f9;
  color: #64748b;
  border: 1px solid var(--border-color, #cbd5e1);
}

.mock-selection-counter.ready {
  background: #dcfce7;
  color: #166534;
  border-color: #86efac;
}

.mock-actions {
  display: flex;
  gap: 8px;
}

.btn-mock-action {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.18s;
}

.btn-mock-action.primary {
  background: #ca8a04;
  color: #ffffff;
}

.btn-mock-action.evaluate {
  background: #16a34a;
  color: #ffffff;
}

.btn-mock-action.outline {
  background: transparent;
  border: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-color, #334155);
}

.mock-paper-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  background: var(--bg-card, #ffffff);
}

.mock-paper-watermark {
  text-align: center;
  border-bottom: 2px solid var(--border-color, #cbd5e1);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.mock-paper-watermark h3 {
  font-family: "Playfair Display", serif;
  font-size: 1.4rem;
  margin: 0;
  color: var(--text-color, #0f172a);
}

.mock-paper-watermark p {
  margin: 4px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted, #64748b);
  font-weight: 600;
}

.mock-question-card {
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  background: var(--bg-card, #ffffff);
}

.mock-question-card.selected-question {
  border: 2px solid #ca8a04;
  box-shadow: 0 4px 20px rgba(202, 138, 4, 0.15);
  background: rgba(202, 138, 4, 0.02);
}

.mock-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.mock-q-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mock-q-num {
  font-family: "Playfair Display", serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--primary, #183059);
}

.mock-q-marks {
  font-weight: 700;
  font-size: 0.82rem;
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 4px;
  color: #475569;
}

.mock-q-source {
  font-size: 0.75rem;
  font-weight: 600;
  color: #2563eb;
  background: #eff6ff;
  padding: 2px 8px;
  border-radius: 4px;
}

.mock-q-select-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--text-color, #0f172a);
}

.mock-q-text {
  line-height: 1.65;
  color: var(--text-color, #1e293b);
  margin-bottom: 16px;
  font-family: "EB Garamond", serif;
  font-size: 1.15rem;
}

.mock-scratchpad {
  margin-top: 14px;
  border: 1px dashed var(--border-color, #cbd5e1);
  border-radius: 8px;
  padding: 12px;
  background: var(--bg-tint, #f8fafc);
}

.mock-scratchpad label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted, #64748b);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.mock-scratchpad textarea {
  width: 100%;
  min-height: 80px;
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 6px;
  padding: 8px;
  font-size: 0.85rem;
  background: var(--bg-card, #ffffff);
  color: var(--text-color, #0f172a);
  font-family: "Inter", sans-serif;
  resize: vertical;
}

.mock-evaluated-answer {
  margin-top: 18px;
  border-top: 2px solid #16a34a;
  padding-top: 16px;
  display: none;
}

.mock-evaluated-answer.revealed {
  display: block;
}

.eval-rubric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.rubric-cell {
  background: var(--bg-tint, #f1f5f9);
  padding: 8px 12px;
  border-radius: 6px;
  border-left: 3px solid #16a34a;
}

.rubric-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: #475569;
}

.rubric-pts {
  font-size: 0.95rem;
  font-weight: 800;
  color: #15803d;
}

/* Starred Bookmarks Drawer */
.bookmarks-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 440px;
  max-width: 90vw;
  height: 100%;
  background: var(--bg-card, #ffffff);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.25);
  z-index: 1150;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
  border-left: 1px solid var(--border-color, #cbd5e1);
  visibility: hidden;
  pointer-events: none;
}

.bookmarks-drawer.active {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

.bm-header {
  padding: 16px 20px;
  background: linear-gradient(135deg, #183059, #0f172a);
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #ca8a04;
}

.bm-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bm-item-card {
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-tint, #f8fafc);
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  transition: all 0.18s;
}

.bm-item-card:hover {
  background: var(--bg-card, #ffffff);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  border-color: #ca8a04;
}

.bm-item-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-color, #0f172a);
}

.bm-item-meta {
  font-size: 0.72rem;
  color: var(--text-muted, #64748b);
  display: flex;
  justify-content: space-between;
}

/* ===================================================================
   3D BOOKS SHOWCASE COMPONENT (VengeanceUI Inspired Three.js Engine)
   =================================================================== */
.view-controls-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.view-mode-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--bg-tint, rgba(24, 48, 89, 0.08));
  padding: 4px;
  border-radius: 9999px;
  border: 1px solid var(--border-color, rgba(203, 213, 225, 0.6));
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.view-mode-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 16px;
  border-radius: 9999px;
  border: none;
  background: transparent;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted, #64748b);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.view-mode-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 9999px;
  padding: 2px;
  background: transparent;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 2;
  transition: all 0.25s ease;
}

.view-mode-btn:hover {
  color: var(--text-primary, #0f172a);
}

.view-mode-btn.active {
  background: #ffffff;
  color: #0f172a;
  box-shadow: 0 4px 16px -2px rgba(37, 99, 235, 0.35);
}

.view-mode-btn.active::before,
.view-mode-btn:hover::before {
  background: linear-gradient(115deg, #1d4ed8 0%, #2563eb 15%, #3b82f6 30%, #93c5fd 46%, #ffffff 54%, #93c5fd 64%, #3b82f6 80%, #1d4ed8 100%);
  background-size: 260% 260%;
  animation: liquid-metal-flow 4.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  filter: drop-shadow(0 0 6px rgba(147, 197, 253, 0.9)) brightness(1.2);
}

[data-theme="dark"] .view-mode-btn.active {
  background: #0e1117;
  color: #ffffff;
  box-shadow: 0 4px 16px -2px rgba(59, 130, 246, 0.4);
}

/* View Mode Toggling */
.subjects-view.mode-books .books-showcase-container-wrap {
  display: block;
}
.subjects-view.mode-books .subjects-grid {
  display: none !important;
}

.subjects-view.mode-grid .books-showcase-container-wrap {
  display: none !important;
}
.subjects-view.mode-grid .subjects-grid {
  display: grid !important;
}

/* 3D Showcase Stage */
.books-showcase-container-wrap {
  margin: 12px 0 28px;
}

.books-showcase-stage {
  position: relative;
  width: 100%;
  height: 660px;
  border-radius: 22px;
  overflow: hidden;
  background: radial-gradient(circle at 50% 32%, #1a2444 0%, #0d1428 55%, #060914 100%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.7);
}

.books-showcase-canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  display: block;
  cursor: grab;
  z-index: 1;
}

.books-showcase-canvas:active {
  cursor: grabbing;
}

/* Floating UI Chevrons */
.bs-nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(14, 22, 46, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 1.1rem;
}

.bs-nav-arrow:hover {
  background: rgba(197, 155, 39, 0.95);
  color: #0b1120;
  border-color: #c59b27;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 8px 24px rgba(197, 155, 39, 0.45);
}

.bs-arrow-prev { left: 24px; }
.bs-arrow-next { right: 24px; }

/* Open Parchment Slip (Hover Prompt) */
.bs-open-slip {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 25;
  transform: translate(-50%, -50%) rotate(-2deg);
  padding: 8px 22px;
  background: #fdfaf2;
  color: #0e162e;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border-radius: 4px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.bs-open-slip.visible {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(-2deg) scale(1.06);
}

/* Close Selected Book Floating Button */
.bs-close-btn {
  position: absolute;
  left: 50%;
  top: 22px;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(14, 22, 46, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  cursor: pointer;
  z-index: 30;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
}

.bs-close-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

.bs-close-btn:hover {
  background: rgba(239, 68, 68, 0.95);
  border-color: #ef4444;
  transform: translateX(-50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

/* Subject Detail Panel (Slide In when Book Opened) */
.bs-detail-panel {
  position: absolute;
  right: 6%;
  top: 50%;
  transform: translateY(-50%) translateX(40px);
  width: min(540px, 45%);
  z-index: 15;
  pointer-events: none;
  opacity: 0;
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.bs-detail-panel.visible {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
  pointer-events: auto;
}

.bs-detail-badges {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.bs-code-badge {
  padding: 4px 12px;
  border-radius: 9999px;
  background: rgba(197, 155, 39, 0.2);
  border: 1px solid rgba(197, 155, 39, 0.45);
  color: #ffd875;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.bs-sem-badge {
  font-size: 0.82rem;
  color: #94a3b8;
  font-weight: 600;
}

.bs-detail-title {
  font-size: clamp(1.9rem, 3.4vw, 3rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 14px;
  font-family: "Playfair Display", Georgia, serif;
}

.bs-detail-desc {
  font-size: 0.96rem;
  line-height: 1.6;
  color: #cbd5e1;
  margin-bottom: 22px;
  max-width: 48ch;
}

.bs-detail-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: #94a3b8;
}

.bs-stars-row {
  color: #f59e0b;
  display: flex;
  gap: 3px;
  font-size: 0.95rem;
}

.bs-meta-divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.2);
}

.bs-detail-actions {
  display: flex;
  gap: 12px;
}

.bs-action-explore {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #c59b27 0%, #e0b84c 100%);
  color: #0b1120;
  font-size: 0.94rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 10px 26px -4px rgba(197, 155, 39, 0.45);
}

.bs-action-explore:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 14px 34px -4px rgba(197, 155, 39, 0.6);
}

.books-showcase-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  font-size: 0.82rem;
  color: var(--text-muted, #64748b);
  text-align: center;
}

.books-showcase-hint i {
  color: #c59b27;
}

/* Responsive adjustments for 3D Books Showcase */
@media (max-width: 960px) {
  .books-showcase-stage {
    height: 560px;
  }
  .bs-detail-panel {
    width: 90%;
    left: 5%;
    right: auto;
    top: auto;
    bottom: 20px;
    transform: translateY(20px);
    background: rgba(14, 20, 38, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.15);
  }
  .bs-detail-panel.visible {
    transform: translateY(0);
  }
  .bs-nav-arrow {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }
  .bs-arrow-prev { left: 14px; }
  .bs-arrow-next { right: 14px; }
}

@media (max-width: 600px) {
  .books-showcase-stage {
    height: 490px;
    border-radius: 16px;
  }
  .bs-detail-title {
    font-size: 1.5rem;
  }
  .bs-detail-desc {
    font-size: 0.85rem;
    line-height: 1.45;
    margin-bottom: 14px;
  }
  .bs-action-explore {
    padding: 12px 20px;
    font-size: 0.86rem;
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   CONTACT MODAL & OVERLAY
   ========================================================================== */
.contact-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 8, 6, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.28s;
}

.contact-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.contact-modal-dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -46%) scale(0.95);
  width: min(92vw, 500px);
  max-height: 90vh;
  max-height: 90dvh;
  scrollbar-width: thin;
  scrollbar-color: rgba(201, 168, 76, 0.4) transparent;
  background: var(--bg-card, #ffffff);
  border-radius: 20px;
  border: 1.5px solid var(--border-line, #e2e8f0);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(201, 168, 76, 0.25);
  z-index: 2010;
  opacity: 0;
  visibility: hidden;
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.28s;
  overflow-y: auto;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
}

[data-theme="dark"] .contact-modal-dialog {
  background: #14110d;
  border-color: rgba(201, 168, 76, 0.35);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.75), 0 0 30px rgba(59, 130, 246, 0.15);
}

.contact-modal-dialog.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.contact-modal-header {
  padding: 16px 20px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-line, #e2e8f0);
  background: var(--sub-bg-tint, #f8fafc);
  border-top-left-radius: 19px;
  border-top-right-radius: 19px;
}

[data-theme="dark"] .contact-modal-header {
  background: #181410;
  border-bottom-color: #2e2820;
}

.contact-modal-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-modal-icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 60%, #3b82f6 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
  flex-shrink: 0;
}

.contact-modal-title-group h3 {
  font-family: var(--font-display, Georgia, serif);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
  line-height: 1.2;
}

.contact-modal-title-group p {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin: 2px 0 0;
  letter-spacing: 0.02em;
}

.contact-modal-close-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border-line);
  background: var(--bg-elevated, #ffffff);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.contact-modal-close-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
  transform: rotate(90deg);
}

.contact-modal-body {
  padding: 16px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-intro-text {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.contact-channels-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-channel-card {
  padding: 14px 16px;
  border-radius: 14px;
  border: 1.5px solid var(--border-line);
  background: var(--bg-elevated, #ffffff);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

[data-theme="dark"] .contact-channel-card {
  background: #1c1813;
  border-color: #332b21;
}

.contact-channel-card:hover {
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.telegram-card {
  border-color: rgba(34, 158, 217, 0.3);
  background: linear-gradient(145deg, rgba(34, 158, 217, 0.04) 0%, var(--bg-elevated) 100%);
}

.telegram-card:hover {
  border-color: #229ed9;
  box-shadow: 0 8px 24px rgba(34, 158, 217, 0.22);
}

.channel-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.channel-icon-pill {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.telegram-pill {
  background: #229ed9;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(34, 158, 217, 0.35);
}

.email-pill {
  background: linear-gradient(135deg, var(--du-crimson-deep), var(--du-crimson));
  color: var(--du-gold);
  border: 1px solid rgba(201, 168, 76, 0.5);
  box-shadow: 0 4px 10px rgba(139, 26, 26, 0.3);
}

.channel-badge {
  font-size: 0.70rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 9999px;
}

.telegram-badge {
  background: rgba(34, 158, 217, 0.14);
  color: #0284c7;
  border: 1px solid rgba(34, 158, 217, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

[data-theme="dark"] .telegram-badge {
  color: #38bdf8;
  background: rgba(34, 158, 217, 0.2);
}

.email-badge {
  background: rgba(201, 168, 76, 0.14);
  color: var(--du-gold-muted);
  border: 1px solid rgba(201, 168, 76, 0.35);
}

[data-theme="dark"] .email-badge {
  color: #e5b869;
}

.live-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.3);
  animation: pulse-emerald 2s infinite;
}

.channel-card-info h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 4px;
}

.channel-card-info p {
  font-size: 0.80rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0 0 8px;
}

.channel-address-box {
  background: var(--bg-app);
  border: 1px solid var(--border-line);
  padding: 6px 12px;
  border-radius: 8px;
  display: inline-block;
  user-select: all;
}

[data-theme="dark"] .channel-address-box {
  background: #120f0c;
  border-color: #2e2820;
}

.channel-address-box code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
}

.channel-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.channel-card-actions.two-buttons {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.contact-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 10px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  border: none;
  white-space: nowrap;
}

.telegram-btn {
  background: linear-gradient(135deg, #229ed9 0%, #0088cc 100%);
  color: #ffffff !important;
  width: 100%;
  box-shadow: 0 4px 14px rgba(34, 158, 217, 0.35);
}

.telegram-btn:hover {
  background: linear-gradient(135deg, #1b8ec5 0%, #0077b5 100%);
  box-shadow: 0 6px 20px rgba(34, 158, 217, 0.5);
  transform: translateY(-1px);
}

.telegram-btn .small-external-icon {
  font-size: 0.72rem;
  opacity: 0.85;
}

.email-primary-btn {
  background: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.3);
}

[data-theme="dark"] .email-primary-btn {
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.email-primary-btn:hover {
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
  transform: translateY(-1px);
}

.email-copy-btn {
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-line);
  color: var(--text-primary);
  padding: 9px 16px;
}

.email-copy-btn:hover {
  background: var(--du-gold-light);
  border-color: var(--du-gold);
  color: var(--du-gold-muted);
}

[data-theme="dark"] .email-copy-btn:hover {
  background: rgba(201, 168, 76, 0.15);
  color: #e5b869;
  border-color: rgba(201, 168, 76, 0.6);
}

.email-copy-btn.copied {
  background: #10b981 !important;
  border-color: #10b981 !important;
  color: #ffffff !important;
}

.contact-modal-footer-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.74rem;
  color: var(--text-muted);
  text-align: center;
  padding-top: 6px;
  border-top: 1px solid var(--border-line);
}

.contact-modal-footer-note i {
  color: var(--du-gold);
}

/* Footer Contact Bar */
.footer-contact-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 14px 0 10px;
  flex-wrap: wrap;
}

.footer-contact-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-contact-item i {
  color: var(--du-gold);
}

.footer-contact-item a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.footer-contact-item a:hover {
  color: var(--du-gold);
}

.footer-contact-sep {
  color: var(--border-line);
  opacity: 0.7;
}

@media (max-width: 480px) {
  .contact-modal-dialog {
    width: 95vw;
    border-radius: 16px;
  }
  .contact-modal-header {
    padding: 16px 18px 14px;
  }
  .contact-modal-body {
    padding: 16px 18px 20px;
    gap: 14px;
  }
  .contact-channel-card {
    padding: 14px;
  }
  .channel-card-actions.two-buttons {
    grid-template-columns: 1fr;
  }
}