/* ============================================================
   POSIM Academic Project Page — Stylesheet
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Core palette (Modern Academic & Trust) */
  --primary: #0ea5e9;
  --primary-light: #e0f2fe;
  --primary-dark: #0369a1;
  --accent: #f97316;
  --accent-light: #ffedd5;
  --text: #0c4a6e;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --bg: #ffffff;
  --bg-alt: #f0f9ff;
  --bg-section: #f8fafc;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Crimson Pro', 'Georgia', serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-w: 1200px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

/* ---------- Utility ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.navbar-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.1rem; color: var(--text);
}
.navbar-brand img {
  height: 36px;
  width: auto;
  border-radius: 6px;
  background: #fff;
  padding: 2px 4px;
}
.navbar-links {
  display: flex; align-items: center; gap: 6px; list-style: none;
}
.navbar-links a {
  padding: 6px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: all var(--transition);
}
.navbar-links a:hover, .navbar-links a.active {
  color: var(--primary);
  background: var(--primary-light);
}
.lang-switch {
  display: inline-flex; align-items: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-left: 8px;
  font-size: 0.8rem;
}
.lang-switch button {
  border: none; background: transparent;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}
.lang-switch button.active {
  background: var(--primary);
  color: #fff;
}
.mobile-menu-btn {
  display: none;
  background: none; border: none;
  cursor: pointer; padding: 6px;
  color: var(--text);
}
.mobile-menu-btn svg { width: 24px; height: 24px; }

/* ---------- Hero ---------- */
.hero {
  padding: 140px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(26,86,219,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-logo-wrap {
  display: inline-block;
  background: rgba(255,255,255,0.85);
  border-radius: 20px;
  padding: 16px 28px;
  margin-bottom: 28px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeInUp 0.8s ease-out;
}
.hero-logo {
  width: 380px;
  display: block;
}
.hero-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.3;
  max-width: 900px;
  margin: 0 auto 16px;
  letter-spacing: -0.02em;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 12px;
  line-height: 1.65;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}
.hero-quote {
  font-style: italic;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease-out 0.25s both;
}
.hero-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
  text-decoration: none;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-outline {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Badges row */
.hero-badges {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 8px;
  animation: fadeInUp 0.8s ease-out 0.35s both;
}
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
}
.badge-dot.green { background: #22c55e; }
.badge-dot.blue { background: #3b82f6; }
.badge-dot.purple { background: #8b5cf6; }
.badge-dot.orange { background: #f59e0b; }

/* ---------- Sections ---------- */
section {
  padding: 72px 0;
}
section:nth-child(even) {
  background: var(--bg-alt);
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ---------- Comparison Table ---------- */
.comparison-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -24px;
  padding: 0 24px;
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.comparison-table thead {
  background: var(--bg-section);
}
.comparison-table th, .comparison-table td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.comparison-table th {
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.comparison-table th:first-child,
.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
}
.comparison-table tr.highlight-row {
  background: var(--accent-light);
  font-weight: 600;
}
.comparison-table tr.highlight-row td {
  color: var(--accent);
}
.comparison-table tr.highlight-row td:first-child {
  color: var(--text);
}
.check { color: var(--accent); font-weight: 700; }
.cross { color: #94a3b8; }

/* ---------- Contributions / Feature Cards ---------- */
.contributions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.contrib-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.contrib-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.contrib-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--primary);
  opacity: 0;
  transition: opacity var(--transition);
}
.contrib-card:hover::before { opacity: 1; }
.contrib-icon {
  width: 44px; height: 44px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}
.contrib-icon svg { width: 22px; height: 22px; }
.contrib-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.contrib-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Framework Image ---------- */
.framework-img-wrap {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  cursor: pointer;
  transition: all var(--transition);
}
.framework-img-wrap:hover {
  box-shadow: var(--shadow-lg);
}
.framework-img-wrap img {
  width: 100%;
  border-radius: var(--radius);
}
.fig-caption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.5;
}
.fig-caption strong {
  color: var(--text-secondary);
}

/* ---------- EBDI Pipeline ---------- */
.pipeline-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin: 32px 0 40px;
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 12px 16px;
  transition: all var(--transition);
  cursor: default;
}
.pipeline-step:hover {
  transform: translateY(-3px);
}
.pipeline-step-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 8px;
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.pipeline-step-icon.perception { background: #6366f1; }
.pipeline-step-icon.belief { background: #3b82f6; }
.pipeline-step-icon.desire { background: #8b5cf6; }
.pipeline-step-icon.intention { background: #ec4899; }
.pipeline-step-icon.action { background: #f59e0b; }
.pipeline-step span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.pipeline-arrow {
  font-size: 1.3rem;
  color: var(--text-muted);
  padding: 0 4px;
  flex-shrink: 0;
}

/* Belief layers */
.belief-layers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 24px 0;
}
.belief-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
}
.belief-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.belief-card .emoji {
  font-size: 1.6rem;
  margin-bottom: 10px;
  display: block;
}
.belief-card h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.belief-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.belief-card .stability-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 8px;
}
.stability-tag.fixed { background: #dbeafe; color: #1e40af; }
.stability-tag.stable { background: #e0e7ff; color: #4338ca; }
.stability-tag.dynamic { background: #fef3c7; color: #92400e; }
.stability-tag.volatile { background: #fce7f3; color: #9d174d; }

/* ---------- Agent Types ---------- */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.agent-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}
.agent-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--primary);
}
.agent-avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.agent-card h4 { font-size: 0.92rem; font-weight: 700; margin-bottom: 6px; }
.agent-card .role { font-size: 0.8rem; color: var(--primary); font-weight: 600; margin-bottom: 8px; }
.agent-card p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }
.citizen-bg { background: #dbeafe; }
.kol-bg { background: #fce7f3; }
.media-bg { background: #d1fae5; }
.gov-bg { background: #fef3c7; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-section);
  padding: 4px;
  border-radius: var(--radius);
  width: fit-content;
  margin: 0 auto 28px;
}
.tab-btn {
  padding: 8px 20px;
  border: none;
  background: transparent;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}
.tab-btn.active {
  background: var(--bg);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.tab-btn:hover:not(.active) {
  color: var(--text);
}
/* Result section titles (replacing tabs) */
.result-section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  padding-bottom: 12px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.result-section-title::before {
  content: '';
  width: 4px;
  height: 22px;
  background: var(--primary);
  border-radius: 2px;
  flex-shrink: 0;
}

/* ---------- Results Tables ---------- */
.result-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background: var(--bg);
}
.result-table thead { background: var(--bg-section); }
.result-table th {
  padding: 12px 14px;
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-align: center;
  border-bottom: 2px solid var(--border);
}
.result-table th:first-child { text-align: left; }
.result-table td {
  padding: 10px 14px;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}
.result-table td:first-child {
  text-align: left;
  font-weight: 600;
}
.result-table tr.ours-row {
  background: #f0fdf4;
}
.result-table tr.ours-row td {
  font-weight: 700;
  color: var(--accent);
}
.result-table tr.ours-row td:first-child { color: var(--text); }
.result-table .best { font-weight: 700; color: var(--accent); }
.result-table .gain {
  font-size: 0.72rem;
  color: var(--accent);
  margin-left: 2px;
}
.metric-arrow-up::after { content: ' ↑'; font-size: 0.7rem; }
.metric-arrow-down::after { content: ' ↓'; font-size: 0.7rem; }

/* ---------- Figure Gallery ---------- */
.figure-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.figure-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
}
.figure-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.figure-card img {
  width: 100%;
  display: block;
  padding: 16px;
}
.figure-card figcaption {
  padding: 0 16px 16px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.55;
}
.figure-card figcaption strong {
  color: var(--text);
  display: block;
  margin-bottom: 4px;
  font-size: 0.86rem;
}
.figure-card.full-width {
  grid-column: 1 / -1;
}

/* ---------- Highlight Boxes ---------- */
.highlight-box {
  background: linear-gradient(135deg, var(--primary-light), #ede9fe);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 32px 0;
  border-left: 4px solid var(--primary);
}
.highlight-box h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.highlight-box p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.metric-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}
.metric-highlight-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.metric-highlight-card .value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}
.metric-highlight-card .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ---------- Dataset section ---------- */
.dataset-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.dataset-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}
.dataset-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.dataset-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 12px;
}
.tag-controversy { background: #fee2e2; color: #991b1b; }
.tag-campus { background: #dbeafe; color: #1e40af; }
.tag-food { background: #fef3c7; color: #92400e; }
.dataset-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.dataset-card p { font-size: 0.83rem; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.55; }
.dataset-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.dataset-stat {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.dataset-stat strong {
  display: block;
  font-size: 1rem;
  color: var(--text);
  font-weight: 700;
}

/* ---------- Validation Framework ---------- */
.validation-tiers {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
}
.tier-card {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 24px 28px;
  position: relative;
  transition: all var(--transition);
}
.tier-card:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.tier-card:last-child { border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.tier-card:not(:last-child) { border-bottom: none; }
.tier-card:hover { background: var(--primary-light); }
.tier-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 700;
  margin-right: 12px;
}
.tier-card h4 { display: inline; font-size: 0.95rem; font-weight: 700; }
.tier-card p { font-size: 0.85rem; color: var(--text-secondary); margin-top: 6px; margin-left: 40px; }
.tier-arrow {
  text-align: center;
  font-size: 1.2rem;
  color: var(--primary);
  padding: 4px 0;
}

/* ---------- Case Study ---------- */
.case-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.case-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.case-card-inner {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 0;
  align-items: center;
}
.case-card-inner > img {
  width: 100%;
  height: 100%;
  max-height: 480px;
  object-fit: contain;
  object-position: center;
  padding: 32px;
  background: #fafafa;
}
.case-card-inner > .case-card-visual {
  width: 100%;
  height: 100%;
  padding: 32px;
}
.case-card-body {
  padding: 32px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.case-card-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.strategy-bar {
  display: grid;
  grid-template-columns: 1fr 2.5fr 0.8fr;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
}
.strategy-name {
  font-size: 0.75rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.bar-track {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s ease-out;
}
.bar-value {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: right;
}
.case-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.finding-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 10px;
  background: #fef3c7;
  color: #92400e;
  margin-top: 10px;
}

/* ---------- Code / BibTeX ---------- */
.bibtex-wrap {
  background: #1e293b;
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  max-width: 700px;
  margin: 24px auto 0;
}
.bibtex-wrap pre {
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}
.copy-btn {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #e2e8f0;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}
.copy-btn:hover { background: rgba(255,255,255,0.2); }

/* ---------- Project Structure ---------- */
.structure-tree {
  background: #1e293b;
  border-radius: var(--radius-lg);
  padding: 24px;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  overflow-x: auto;
  max-width: 700px;
  margin: 0 auto;
}
.structure-tree .folder { color: #93c5fd; }
.structure-tree .file { color: #a5b4fc; }
.structure-tree .comment { color: #64748b; }

/* ---------- Footer ---------- */
.footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}
.footer p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer a { color: var(--primary); }

/* ---------- Lightbox ---------- */
.lightbox {
  display: none;
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  padding: 40px;
  backdrop-filter: blur(4px);
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 95%;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 0 40px rgba(0,0,0,0.4);
}
.lightbox-close {
  position: absolute;
  top: 20px; right: 24px;
  background: none; border: none;
  color: #fff; font-size: 2rem;
  cursor: pointer;
  line-height: 1;
}

/* ---------- Scroll animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 42px; height: 42px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(12px);
  transition: all var(--transition);
  z-index: 100;
}
.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}
.back-to-top svg { width: 20px; height: 20px; }

/* ---------- Coming Soon Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.modal-box {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  text-align: center;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
}
.modal-overlay.open .modal-box {
  transform: scale(1) translateY(0);
}
.modal-box .modal-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}
.modal-box h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.modal-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.6;
}
.modal-box .btn {
  min-width: 120px;
}

/* ---------- Particle canvas ---------- */
#particleCanvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}
.hero { position: relative; }
.hero .container { position: relative; z-index: 1; }

/* ---------- Floating progress indicator ---------- */
.reading-progress {
  position: fixed;
  top: 60px; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #8b5cf6);
  z-index: 999;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* ---------- Tilt cards ---------- */
.contrib-card {
  transform-style: preserve-3d;
  perspective: 800px;
}

/* ---------- Tooltip ---------- */
[data-tooltip] {
  position: relative;
  cursor: help;
}
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: #1e293b;
  color: #fff;
  font-size: 0.75rem;
  padding: 5px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}
[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-8px);
}

/* ---------- Number count-up glow ---------- */
.metric-highlight-card .value.counting {
  text-shadow: 0 0 20px rgba(26,86,219,0.3);
}

/* ---------- Figure card zoom icon ---------- */
.figure-card {
  position: relative;
}
.figure-card::after {
  content: '\1F50D';
  position: absolute;
  top: 12px; right: 12px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity var(--transition);
  box-shadow: var(--shadow-sm);
}
.figure-card:hover::after {
  opacity: 1;
}

/* ---------- Keyframes ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .contributions-grid { grid-template-columns: repeat(2, 1fr); }
  .belief-layers { grid-template-columns: repeat(2, 1fr); }
  .agent-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero { padding: 120px 0 60px; }
  .hero-title { font-size: 1.6rem; }
  .hero-logo { width: 280px; }
  .section-title { font-size: 1.4rem; }
  section { padding: 48px 0; }
  .contributions-grid { grid-template-columns: 1fr; }
  .belief-layers { grid-template-columns: 1fr; }
  .agent-grid { grid-template-columns: repeat(2, 1fr); }
  .figure-gallery { grid-template-columns: 1fr; }
  .dataset-cards { grid-template-columns: 1fr; }
  .metric-highlights { grid-template-columns: 1fr; }
  .case-card-inner { grid-template-columns: 1fr; }
  .pipeline-flow { gap: 0; }
  .navbar-links { display: none; }
  .navbar-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    box-shadow: var(--shadow-lg);
  }
  .mobile-menu-btn { display: block; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.35rem; }
  .agent-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; align-items: center; }
}