@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Outfit:wght@300;400;500;600;700;800&family=Syne:wght@600;700;800&family=Noto+Sans+TC:wght@300;400;500;700;900&display=swap');

/* ==========================================================================
   ISOTITA ACADEMY DESIGN SYSTEM — CELESTIAL NEO-ACADEMY AESTHETICS
   ========================================================================== */

:root {
  color-scheme: dark;

  /* Base Canvas & Atmosphere (Deep Celestial Void) */
  --bg: #070913;
  --bg-deep: #04050c;
  --bg-elevated: #0d1226;
  --surface: rgba(15, 20, 42, 0.75);
  --surface-hover: rgba(23, 31, 65, 0.85);
  --surface-strong: #141a38;
  --surface-glass: rgba(255, 255, 255, 0.035);
  --surface-soft: rgba(56, 189, 248, 0.06);

  /* Typography Colors */
  --text: #f8fafc;
  --text-soft: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Borders & Gridlines */
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-accent: rgba(56, 189, 248, 0.35);

  /* Academy Core Theme Colors */
  --accent: #38bdf8;
  --accent-light: #7dd3fc;
  --accent-glow: rgba(56, 189, 248, 0.28);
  --accent-cyan: #22d3ee;

  /* Five Academic Departments (五大學系代表色) */
  --dept-bio: #10b981;
  --dept-bio-light: #34d399;
  --dept-bio-glow: rgba(16, 185, 129, 0.25);

  --dept-eti: #f472b6;
  --dept-eti-light: #fb7185;
  --dept-eti-glow: rgba(244, 114, 182, 0.25);

  --dept-tac: #f87171;
  --dept-tac-light: #fb923c;
  --dept-tac-glow: rgba(248, 113, 113, 0.25);

  --dept-art: #a78bfa;
  --dept-art-light: #c084fc;
  --dept-art-glow: rgba(167, 139, 250, 0.25);

  --dept-eng: #fbbf24;
  --dept-eng-light: #f59e0b;
  --dept-eng-glow: rgba(251, 191, 36, 0.25);

  /* Universal Accents */
  --gold: #fcd34d;
  --success: #34d399;
  --glitch: #f43f5e;

  /* Elevation, Radius & Filters */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --radius-full: 9999px;

  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 12px 36px -8px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 60px -12px rgba(2, 4, 18, 0.7);
  --shadow-glow: 0 0 40px -10px var(--accent-glow);

  --blur-glass: blur(20px) saturate(180%);
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

:root[data-theme="light"] {
  color-scheme: light;

  /* Base Canvas & Atmosphere (Academy Ivory & Celestial Archival) */
  --bg: #f5f7fb;
  --bg-deep: #e8ecf4;
  --bg-elevated: #ffffff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-hover: rgba(255, 255, 255, 0.95);
  --surface-strong: #ffffff;
  --surface-glass: rgba(15, 23, 42, 0.03);
  --surface-soft: rgba(2, 132, 199, 0.07);

  /* Typography Colors */
  --text: #0f172a;
  --text-soft: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  /* Borders & Gridlines */
  --line: rgba(15, 23, 42, 0.09);
  --line-strong: rgba(15, 23, 42, 0.16);
  --line-accent: rgba(2, 132, 199, 0.4);

  /* Academy Core Theme Colors */
  --accent: #0284c7;
  --accent-light: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.18);
  --accent-cyan: #0891b2;

  /* Five Academic Departments */
  --dept-bio: #059669;
  --dept-bio-light: #047857;
  --dept-bio-glow: rgba(5, 150, 105, 0.18);

  --dept-eti: #db2777;
  --dept-eti-light: #be185d;
  --dept-eti-glow: rgba(219, 39, 119, 0.18);

  --dept-tac: #dc2626;
  --dept-tac-light: #b91c1c;
  --dept-tac-glow: rgba(220, 38, 38, 0.18);

  --dept-art: #7c3aed;
  --dept-art-light: #6d28d9;
  --dept-art-glow: rgba(124, 58, 237, 0.18);

  --dept-eng: #d97706;
  --dept-eng-light: #b45309;
  --dept-eng-glow: rgba(217, 119, 6, 0.18);

  --gold: #b45309;
  --success: #059669;
  --glitch: #e11d48;

  --shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 32px -6px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 24px 50px -10px rgba(15, 23, 42, 0.14);
  --shadow-glow: 0 0 32px -6px var(--accent-glow);
}

/* ==========================================================================
   RESET & GLOBAL BASE
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-width: 320px;
  background-color: var(--bg);
  background-image: 
    radial-gradient(ellipse 70% 50% at 85% 5%, rgba(56, 189, 248, 0.12), transparent 70%),
    radial-gradient(ellipse 60% 40% at 10% 35%, rgba(167, 139, 250, 0.09), transparent 60%),
    radial-gradient(ellipse 50% 50% at 90% 85%, rgba(244, 114, 182, 0.07), transparent 60%),
    linear-gradient(180deg, rgba(7, 9, 19, 0.4) 0%, transparent 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: 'Outfit', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

:root[data-theme="light"] body {
  background-image:
    radial-gradient(ellipse 70% 50% at 85% 5%, rgba(2, 132, 199, 0.08), transparent 70%),
    radial-gradient(ellipse 60% 40% at 10% 35%, rgba(124, 58, 237, 0.05), transparent 60%),
    radial-gradient(ellipse 50% 50% at 90% 85%, rgba(219, 39, 119, 0.04), transparent 60%);
}

/* Academy Grid Lines Background Overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.28;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -999px;
  left: 1rem;
  z-index: 999;
  padding: 0.75rem 1.25rem;
  background: var(--surface-strong);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.skip-link:focus {
  top: 1rem;
}

/* ==========================================================================
   LAYOUT ARCHITECTURE (SIDEBAR + MAIN CONTENT)
   ========================================================================== */

.site-shell {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ----------------- SIDEBAR ----------------- */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 2rem 1.4rem 1.5rem;
  background: linear-gradient(180deg, rgba(10, 14, 30, 0.95), rgba(7, 9, 19, 0.98));
  backdrop-filter: var(--blur-glass);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 40;
  box-shadow: var(--shadow-sm);
  overflow-y: auto;
}

:root[data-theme="light"] .sidebar {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 247, 251, 0.96));
}

/* Brand & Crest */
.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  padding-bottom: 0.5rem;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #0284c7);
  color: #ffffff;
  display: grid;
  place-items: center;
  position: relative;
  box-shadow: 0 0 24px var(--accent-glow);
  flex-shrink: 0;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand:hover .brand-mark {
  transform: rotate(45deg) scale(1.05);
}

.brand-mark svg {
  width: 24px;
  height: 24px;
  transition: transform 0.4s ease;
}

.brand:hover .brand-mark svg {
  transform: rotate(-45deg);
}

.brand-title {
  display: flex;
  flex-direction: column;
}

.brand-title strong {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  line-height: 1.25;
}

.brand-title small {
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  font-weight: 500;
  margin-top: 2px;
}

/* Academy Tagline Pill */
.nav-heading-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.6rem;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.eyebrow {
  margin: 0;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  font-weight: 700;
  text-transform: uppercase;
}

.semester-badge {
  font-size: 0.68rem;
  font-family: 'JetBrains Mono', monospace;
  padding: 0.15rem 0.45rem;
  background: var(--surface-soft);
  color: var(--accent-light);
  border-radius: var(--radius-xs);
  font-weight: 600;
}

/* Side Nav Links */
.side-nav {
  display: flex;
  flex-direction: column;
  gap: 0.38rem;
}

.side-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.68rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid transparent;
  position: relative;
}

.nav-link-content {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.nav-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  color: var(--text-dim);
  font-weight: 600;
  transition: color 0.2s ease;
}

.side-nav a:hover {
  color: var(--text);
  background: var(--surface-hover);
  border-color: var(--line);
  transform: translateX(3px);
}

.side-nav a:hover .nav-num {
  color: var(--accent);
}

.side-nav a.active {
  color: #ffffff;
  background: linear-gradient(90deg, rgba(56, 189, 248, 0.16), rgba(56, 189, 248, 0.04));
  border-color: var(--line-accent);
  box-shadow: 0 4px 20px -4px var(--accent-glow);
  font-weight: 600;
}

:root[data-theme="light"] .side-nav a.active {
  color: var(--accent-light);
  background: rgba(2, 132, 199, 0.1);
}

.side-nav a.active .nav-num {
  color: var(--accent);
}

.side-nav a.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 25%;
  bottom: 25%;
  width: 3px;
  background: var(--accent);
  border-radius: var(--radius-full);
  box-shadow: 0 0 10px var(--accent);
}

.nav-arrow {
  font-size: 0.8rem;
  color: var(--text-dim);
  opacity: 0;
  transform: translateX(-4px);
  transition: var(--transition);
}

.side-nav a:hover .nav-arrow,
.side-nav a.active .nav-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--accent);
}

/* Sidebar Footer Dossier */
.side-footer {
  margin-top: auto;
  padding: 1.1rem 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.side-footer .org-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-muted);
  font-weight: 500;
}

.side-footer .org-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dept-bio-light);
  box-shadow: 0 0 8px var(--dept-bio);
}

.side-footer .period {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-soft);
  font-size: 0.75rem;
}

/* ----------------- TOPBAR (STICKY GLASS) ----------------- */
.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 3vw;
  background: rgba(7, 9, 19, 0.75);
  backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease;
}

:root[data-theme="light"] .topbar {
  background: rgba(245, 247, 251, 0.82);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-menu-btn {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line);
  place-items: center;
  color: var(--text);
}

.topbar-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.pulse-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  animation: pulse-glow 2.5s infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-glow); opacity: 1; }
  50% { box-shadow: 0 0 0 7px transparent; opacity: 0.7; }
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.version-pill {
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font: 600 0.76rem 'JetBrains Mono', monospace;
  background: var(--surface-glass);
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 0.84rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: translateY(-1px);
}

.theme-icon {
  font-size: 1rem;
}

/* ==========================================================================
   HERO BANNER & ACADEMY BROADCAST (視覺震撼開場)
   ========================================================================== */

.content {
  width: min(1200px, calc(100% - 3.5rem));
  margin: 0 auto;
  padding: 2.5rem 0 6rem;
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.85fr);
  gap: 2.5rem;
  align-items: center;
  padding: 2rem 0 3.5rem;
  position: relative;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.hero-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.badge-celestial {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, rgba(56, 189, 248, 0.15), rgba(167, 139, 250, 0.15));
  border: 1px solid var(--line-accent);
  color: var(--accent-light);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: 0 0 20px -5px var(--accent-glow);
}

h1 {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: clamp(2.4rem, 4.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--text);
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-light) 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

:root[data-theme="light"] h1 {
  background: linear-gradient(135deg, #0f172a 40%, var(--accent) 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead {
  font-size: clamp(1.1rem, 1.8vw, 1.28rem);
  color: var(--text-soft);
  line-height: 1.7;
  max-width: 640px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.4rem;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 0.84rem;
  font-weight: 500;
  transition: var(--transition);
}

.tag-pill:hover {
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-2px);
}

/* Headmaster Terminal Broadcast Box */
.hero-terminal {
  background: linear-gradient(145deg, rgba(17, 24, 52, 0.88), rgba(11, 15, 34, 0.95));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  box-shadow: var(--shadow-lg), 0 0 35px -8px var(--accent-glow);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

:root[data-theme="light"] .hero-terminal {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(240, 244, 253, 0.9));
  border-color: rgba(2, 132, 199, 0.25);
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
}

.terminal-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.terminal-dots {
  display: flex;
  gap: 0.35rem;
}

.terminal-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-quote {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.terminal-desc {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.65;
}

.terminal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.4rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.terminal-blink {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: var(--accent);
  vertical-align: middle;
  margin-left: 4px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ==========================================================================
   GENERIC SECTIONS, HEADINGS & GRIDS
   ========================================================================== */

.section {
  scroll-margin-top: 5.5rem;
  padding: 4.5rem 0 2rem;
  position: relative;
}

.section + .section {
  border-top: 1px dashed var(--line);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  margin-bottom: 2rem;
}

.section-index {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: 0.5rem;
}

h2 {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: clamp(2rem, 3.2vw, 2.7rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text);
}

.section-desc {
  max-width: 520px;
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.6;
}

h3 {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: 1.26rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 0.6rem;
}

h4 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
}

p {
  color: var(--text-soft);
  margin-bottom: 0.6rem;
}

.spaced {
  margin-top: 1.5rem;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 1.4rem;
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

/* Card System */
.card {
  padding: 1.6rem;
  background: var(--surface);
  backdrop-filter: var(--blur-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--line-strong);
  background: var(--surface-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card.accent {
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.1), rgba(15, 20, 42, 0.8));
  border-color: var(--line-accent);
  box-shadow: 0 0 30px -10px var(--accent-glow);
}

:root[data-theme="light"] .card.accent {
  background: linear-gradient(145deg, rgba(2, 132, 199, 0.08), rgba(255, 255, 255, 0.95));
}

.quote {
  margin: 0.9rem 0;
  padding: 0.9rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--surface-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text);
  font-weight: 500;
}

.quote em {
  font-style: normal;
  color: var(--accent-light);
}

/* ==========================================================================
   MODULE 01: OVERVIEW METRICS & TIMELINE
   ========================================================================== */

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.2rem;
  margin-bottom: 1.8rem;
}

.stat-gauge {
  padding: 1.4rem 1.3rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-gauge::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-cyan));
  box-shadow: 0 0 10px var(--accent);
}

.stat-gauge:hover {
  transform: translateY(-3px);
  border-color: var(--line-accent);
  box-shadow: var(--shadow-glow);
}

.stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
  letter-spacing: -0.04em;
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}

.stat-unit {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
}

.stat-label {
  margin-top: 0.45rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* Constellation Roadmap Timeline */
.timeline-track {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1.8rem 0;
  position: relative;
}

.timeline-card {
  display: flex;
  flex-direction: column;
  padding: 1.35rem 1.1rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
  text-decoration: none;
  position: relative;
  transition: var(--transition);
}

.timeline-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: var(--surface-hover);
  box-shadow: 0 12px 30px -8px var(--accent-glow);
}

.timeline-step {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-xs);
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 0.8rem;
}

.timeline-card h4 {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0.2rem 0 0.5rem;
  color: var(--text);
  line-height: 1.3;
}

.timeline-card p {
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Individual Month Indicators */
.timeline-card[data-month="10"] .timeline-step { background: rgba(56, 189, 248, 0.15); color: var(--accent); }
.timeline-card[data-month="11"] .timeline-step { background: rgba(16, 185, 129, 0.15); color: var(--dept-bio-light); }
.timeline-card[data-month="12"] .timeline-step { background: rgba(244, 114, 182, 0.15); color: var(--dept-eti-light); }
.timeline-card[data-month="01"] .timeline-step { background: rgba(248, 113, 113, 0.15); color: var(--dept-tac-light); }
.timeline-card[data-month="02"] .timeline-step { background: rgba(167, 139, 250, 0.15); color: var(--dept-art-light); }
.timeline-card[data-month="03"] .timeline-step { background: rgba(251, 191, 36, 0.15); color: var(--dept-eng-light); }

/* Emotional Ladder */
.ladder-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ladder-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  font-size: 0.92rem;
}

.ladder-month {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}

.ladder-text strong {
  color: var(--text);
  margin-right: 0.4rem;
}

/* ==========================================================================
   MODULE 02: IDENTITY & DEPARTMENT SIGILS
   ========================================================================== */

.dept-sigil-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.dept-card {
  padding: 1.6rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.dept-card::before {
  content: attr(data-code);
  position: absolute;
  right: 0.8rem;
  top: 0.4rem;
  font-family: 'Syne', sans-serif;
  font-size: 4rem;
  font-weight: 900;
  color: var(--dept-color, var(--accent));
  opacity: 0.08;
  pointer-events: none;
  line-height: 1;
}

.dept-card:hover {
  transform: translateY(-4px);
  border-color: var(--dept-color, var(--accent));
  box-shadow: 0 12px 35px -8px var(--dept-glow, var(--accent-glow));
}

.dept-icon-box {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--dept-glow, var(--accent-glow));
  color: var(--dept-color, var(--accent));
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 1.1rem;
}

.dept-card h3 {
  color: var(--text);
  margin-bottom: 0.35rem;
}

.dept-method-pill {
  display: inline-block;
  align-self: flex-start;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--dept-glow, var(--accent-glow));
  color: var(--dept-color, var(--accent));
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.dept-desc {
  font-size: 0.92rem;
  color: var(--text-soft);
  line-height: 1.6;
}

/* Five Department Coloring Variables */
.dept-card[data-dept="BIO"] { --dept-color: var(--dept-bio-light); --dept-glow: var(--dept-bio-glow); }
.dept-card[data-dept="ETI"] { --dept-color: var(--dept-eti-light); --dept-glow: var(--dept-eti-glow); }
.dept-card[data-dept="TAC"] { --dept-color: var(--dept-tac-light); --dept-glow: var(--dept-tac-glow); }
.dept-card[data-dept="ART"] { --dept-color: var(--dept-art-light); --dept-glow: var(--dept-art-glow); }
.dept-card[data-dept="ENG"] { --dept-color: var(--dept-eng-light); --dept-glow: var(--dept-eng-glow); }

/* Student Slots */
.student-dossier-box {
  margin-top: 1.8rem;
  padding: 1.6rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
}

.student-slots {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.2rem;
}

.student-slot {
  padding: 1.1rem;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface-glass);
  text-align: center;
  transition: var(--transition);
}

.student-slot:hover {
  border-color: var(--accent);
  background: var(--surface-soft);
}

.student-avatar-ph {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  margin: 0 auto 0.75rem;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--text-dim);
  font-size: 1.4rem;
}

.student-name-ph {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text);
}

.student-tag-ph {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ==========================================================================
   MODULE 03: INTERACTIVE DIGITAL STUDENT ID CARD (核心亮點)
   ========================================================================== */

.student-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0 2.5rem;
}

.flow-step-node {
  padding: 1rem 0.8rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.flow-step-node:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.flow-step-node strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  color: var(--accent);
  display: block;
}

.flow-step-node span {
  font-size: 0.84rem;
  color: var(--text-soft);
  font-weight: 500;
}

/* Interactive Card Customizer Panel */
.card-studio-wrap {
  display: grid;
  grid-template-columns: minmax(320px, 1.1fr) minmax(300px, 0.9fr);
  gap: 2.2rem;
  align-items: center;
  padding: 2.2rem;
  background: linear-gradient(145deg, rgba(16, 22, 48, 0.85), rgba(9, 12, 28, 0.95));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 50px -15px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

:root[data-theme="light"] .card-studio-wrap {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(238, 243, 253, 0.92));
}

/* The Holographic Digital ID Card */
.id-card-preview-area {
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.id-card {
  width: 100%;
  max-width: 440px;
  min-height: 260px;
  border-radius: 20px;
  padding: 1.7rem;
  position: relative;
  background: linear-gradient(135deg, #131a38 0%, #0c1024 100%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px -5px var(--card-glow, var(--accent-glow));
  overflow: hidden;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Holographic Rainbow Foil Sheen */
.id-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    transparent 0%,
    rgba(255, 255, 255, 0.08) 30%,
    rgba(244, 114, 182, 0.14) 45%,
    rgba(56, 189, 248, 0.18) 55%,
    rgba(251, 191, 36, 0.14) 70%,
    transparent 100%
  );
  pointer-events: none;
  opacity: 0.85;
  mix-blend-mode: color-dodge;
  transition: opacity 0.3s ease;
}

.id-card:hover {
  transform: translateY(-6px) rotateX(4deg) rotateY(-4deg);
}

.id-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
  z-index: 2;
}

.id-academy-name {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #ffffff;
}

.id-academy-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--card-color, var(--accent));
  font-weight: 600;
}

.id-chip {
  width: 38px;
  height: 28px;
  border-radius: 6px;
  background: linear-gradient(135deg, #fcd34d, #b45309);
  border: 1px solid rgba(255, 255, 255, 0.4);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.4);
}

.id-chip::before {
  content: "";
  position: absolute;
  inset: 5px 0;
  border-top: 1px solid rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(0, 0, 0, 0.4);
}

.id-card-body {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin: 1.2rem 0;
  position: relative;
  z-index: 2;
}

.id-avatar-slot {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 2px solid var(--card-color, var(--accent));
  box-shadow: 0 0 16px var(--card-glow, var(--accent-glow));
  display: grid;
  place-items: center;
  font-size: 2rem;
  flex-shrink: 0;
}

.id-info-stack {
  display: flex;
  flex-direction: column;
}

.id-student-name {
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
}

.id-dept-name {
  font-size: 0.88rem;
  color: var(--card-color, var(--accent));
  font-weight: 700;
  margin-top: 0.2rem;
}

.id-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  position: relative;
  z-index: 2;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  padding-top: 0.8rem;
}

.id-student-no {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.06em;
}

.id-term {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.id-barcode {
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 2px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.4);
}

/* Card Department Dynamic State */
.id-card[data-dept="BIO"] { --card-color: var(--dept-bio-light); --card-glow: var(--dept-bio-glow); }
.id-card[data-dept="ETI"] { --card-color: var(--dept-eti-light); --card-glow: var(--dept-eti-glow); }
.id-card[data-dept="TAC"] { --card-color: var(--dept-tac-light); --card-glow: var(--dept-tac-glow); }
.id-card[data-dept="ART"] { --card-color: var(--dept-art-light); --card-glow: var(--dept-art-glow); }
.id-card[data-dept="ENG"] { --card-color: var(--dept-eng-light); --card-glow: var(--dept-eng-glow); }

/* Card Studio Controls */
.card-studio-controls {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.control-group label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}

.custom-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}

.custom-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

.dept-selector-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.dept-btn {
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.dept-btn:hover {
  border-color: var(--btn-color, var(--accent));
  color: var(--text);
}

.dept-btn.active {
  background: var(--btn-glow, var(--accent-glow));
  border-color: var(--btn-color, var(--accent));
  color: #ffffff;
  box-shadow: 0 0 14px var(--btn-glow, var(--accent-glow));
}

.dept-btn[data-dept="BIO"] { --btn-color: var(--dept-bio-light); --btn-glow: var(--dept-bio-glow); }
.dept-btn[data-dept="ETI"] { --btn-color: var(--dept-eti-light); --btn-glow: var(--dept-eti-glow); }
.dept-btn[data-dept="TAC"] { --btn-color: var(--dept-tac-light); --btn-glow: var(--dept-tac-glow); }
.dept-btn[data-dept="ART"] { --btn-color: var(--dept-art-light); --btn-glow: var(--dept-art-glow); }
.dept-btn[data-dept="ENG"] { --btn-color: var(--dept-eng-light); --btn-glow: var(--dept-eng-glow); }

/* ==========================================================================
   MODULE 04: SIX MISSIONS ACCORDION & GLITCH
   ========================================================================== */

.mission-list {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

details.mission-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  backdrop-filter: var(--blur-glass);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

details.mission-card[open] {
  border-color: var(--line-accent);
  box-shadow: var(--shadow-md), 0 0 30px -10px var(--accent-glow);
}

summary.mission-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.6rem;
  cursor: pointer;
  list-style: none;
  font-family: 'Syne', 'Noto Sans TC', sans-serif;
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--text);
  gap: 1rem;
  transition: background 0.2s ease;
}

summary.mission-summary::-webkit-details-marker {
  display: none;
}

summary.mission-summary:hover {
  background: var(--surface-hover);
}

.summary-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.summary-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-xs);
  background: var(--surface-soft);
  color: var(--accent);
  font-weight: 700;
}

.summary-chevron {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 0.85rem;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  flex-shrink: 0;
}

details[open] .summary-chevron {
  transform: rotate(180deg);
  background: var(--accent);
  color: #04050c;
}

.details-body {
  padding: 0.5rem 1.6rem 1.8rem;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
  line-height: 1.7;
}

.mission-key-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  padding: 1rem;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin: 1rem 0 1.2rem;
}

.key-meta-item strong {
  display: block;
  font-size: 0.76rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 0.2rem;
}

.key-meta-item span {
  font-weight: 600;
  color: var(--text);
  font-size: 0.92rem;
}

.details-body h4 {
  margin-top: 1.2rem;
  color: var(--accent);
  font-size: 0.96rem;
}

.details-body ul {
  padding-left: 1.3rem;
  color: var(--text-soft);
}

.details-body li {
  margin: 0.4rem 0;
}

/* Mission 01 Glitch / Recovered Stamp Styling */
.glitch-stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.85rem;
  border: 2px solid var(--glitch);
  border-radius: var(--radius-xs);
  color: var(--glitch);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  transform: rotate(-2deg);
  background: rgba(244, 63, 94, 0.1);
  box-shadow: 0 0 14px rgba(244, 63, 94, 0.25);
}

/* ==========================================================================
   MODULE 05 & 06: OPERATIONS, CHECKLIST & CODE TEMPLATES
   ========================================================================== */

/* Stream Timeline Grid */
.stream-run-timeline {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.8rem;
}

.stream-phase-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.stream-phase-row:hover {
  border-color: var(--line-accent);
  background: var(--surface-soft);
}

.stream-time-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
}

.stream-task-desc {
  font-size: 0.9rem;
  color: var(--text-soft);
}

.stream-task-desc strong {
  color: var(--text);
  margin-right: 0.35rem;
}

/* Interactive Checklist */
.checklist-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.checklist-counter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
}

.btn-secondary {
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-xs);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.78rem;
  transition: var(--transition);
}

.btn-secondary:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.interactive-checklist {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: var(--transition);
}

.check-item:hover {
  border-color: var(--accent);
  background: var(--surface-soft);
}

.check-box-indicator {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1.5px solid var(--text-dim);
  display: grid;
  place-items: center;
  color: #ffffff;
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.check-item.checked {
  border-color: var(--success);
  background: rgba(52, 211, 153, 0.08);
}

.check-item.checked .check-box-indicator {
  background: var(--success);
  border-color: var(--success);
}

.check-label {
  font-size: 0.92rem;
  color: var(--text-soft);
  transition: var(--transition);
}

.check-item.checked .check-label {
  color: var(--text-dim);
  text-decoration: line-through;
}

/* Code Snippet Box with Copy Button */
.code-template-card {
  position: relative;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--bg-deep);
  overflow: hidden;
  margin-top: 1rem;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 1rem;
  background: var(--surface-glass);
  border-bottom: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.copy-snippet-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-xs);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 0.76rem;
  font-weight: 600;
  transition: var(--transition);
}

.copy-snippet-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.copy-snippet-btn.copied {
  background: var(--success);
  color: #04050c;
  border-color: var(--success);
}

pre.code-block {
  margin: 0;
  padding: 1.1rem 1.2rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--accent-light);
  background: transparent;
}

/* ==========================================================================
   FOOTER & NOTIFICATIONS
   ========================================================================== */

.footer {
  margin-top: 6rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 0.86rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand-sig {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  color: var(--text-soft);
}

/* Toast Notification */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 0.85rem 1.4rem;
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--line-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), 0 0 25px var(--accent-glow);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 100;
  opacity: 0;
  transform: translateY(15px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-msg.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET & MOBILE OPTIMIZATIONS)
   ========================================================================== */

@media (max-width: 1080px) {
  .site-shell {
    grid-template-columns: 250px minmax(0, 1fr);
  }
  .dept-sigil-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .card-studio-wrap {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .site-shell {
    display: block;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 99;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    z-index: 98;
    display: none;
  }

  .sidebar-backdrop.show {
    display: block;
  }

  .mobile-menu-btn {
    display: grid;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .stat-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .student-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .student-slots {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .content {
    width: calc(100% - 1.8rem);
    padding: 1.5rem 0 4rem;
  }

  .section {
    padding: 3.2rem 0 1.5rem;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .grid-2, .grid-3, .dept-sigil-grid {
    grid-template-columns: 1fr;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  .timeline-track {
    grid-template-columns: 1fr;
  }

  .student-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .student-slots {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stream-phase-row {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

  .mission-key-meta {
    grid-template-columns: 1fr;
  }
}