/* ═══════════════════ TransBiolab Design System ═══════════════════ */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-glass: rgba(255, 255, 255, 0.08);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-sam3: #a78bfa;
  --accent-sam3-dim: rgba(167, 139, 250, 0.15);
  --accent-fp: #38bdf8;
  --accent-fp-dim: rgba(56, 189, 248, 0.15);
  --accent-green: #34d399;
  --accent-yellow: #fbbf24;
  --accent-orange: #fb923c;
  --accent-red: #f87171;
  --grad-hero: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  --grad-sam3: linear-gradient(135deg, #7c3aed, #a78bfa);
  --grad-fp: linear-gradient(135deg, #0284c7, #38bdf8);
  --grad-accent: linear-gradient(135deg, #6366f1 0%, #a78bfa 50%, #38bdf8 100%);
  --section-pad: 90px;
  --container-w: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

/* ═══════════════════ Nav ═══════════════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: all 0.3s var(--ease);
}
.nav.scrolled { background: rgba(10, 14, 26, 0.96); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
.nav-inner {
  max-width: var(--container-w); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 60px;
}
.nav-logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text-primary); font-weight: 700; font-size: 17px; }
.logo-icon { font-size: 22px; }
.nav-links { display: flex; gap: 6px; }
.nav-link {
  text-decoration: none; color: var(--text-secondary); font-size: 13px; font-weight: 500;
  padding: 5px 12px; border-radius: var(--radius-sm); transition: all 0.2s var(--ease);
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-glass); }
.nav-link.active { color: var(--text-primary); background: rgba(99,102,241,0.15); }

/* ═══════════════════ Hero ═══════════════════ */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--grad-hero); overflow: hidden; padding: 100px 24px 60px;
}
.hero::before {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(99,102,241,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(56,189,248,0.06) 0%, transparent 60%);
  animation: heroGlow 15s ease-in-out infinite alternate;
}
@keyframes heroGlow { 0% { transform: translate(0,0); } 100% { transform: translate(-3%,2%); } }
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 960px; }
.hero-badge {
  display: inline-block; padding: 5px 16px; background: var(--grad-accent);
  border-radius: 100px; font-size: 11px; font-weight: 600; letter-spacing: 1.5px;
  text-transform: uppercase; margin-bottom: 20px; color: white;
}
.hero-title {
  font-size: clamp(52px, 9vw, 88px); font-weight: 900; line-height: 1;
  letter-spacing: -3px; margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 50%, #7dd3fc 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-paper-title {
  font-size: clamp(16px, 2.5vw, 22px); font-weight: 400; color: var(--text-secondary);
  margin-bottom: 20px; line-height: 1.4;
}

/* Authors */
.hero-authors { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 8px; }
.author { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.author sup { color: var(--accent-sam3); font-size: 10px; }
.hero-affiliations {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
  margin-bottom: 24px; font-size: 12px; color: var(--text-muted);
}
.hero-affiliations sup { color: var(--accent-sam3); }
.corresponding { color: var(--accent-yellow); }

.hero-desc {
  font-size: 15px; color: var(--text-secondary); max-width: 700px;
  margin: 0 auto 32px; line-height: 1.7;
}
.hero-desc strong { color: var(--text-primary); }

/* Dashboard stats */
.hero-stats {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px;
}
.stat-card {
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-md); padding: 12px 16px; text-align: center;
  backdrop-filter: blur(10px); transition: transform 0.3s var(--ease);
  min-width: 0; flex: 1;
}
.stat-card:hover { transform: translateY(-3px); }
.stat-value { font-size: 28px; font-weight: 800; letter-spacing: -1px; }
.stat-unit { font-size: 18px; font-weight: 500; opacity: 0.7; }
.stat-label { font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.8px; margin-top: 2px; }

/* Action buttons */
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-primary, .btn-secondary {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
  border-radius: 100px; font-weight: 600; font-size: 14px; text-decoration: none;
  transition: all 0.3s var(--ease);
}
.btn-primary {
  background: var(--grad-accent); color: white;
  box-shadow: 0 4px 20px rgba(99,102,241,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.5); }
.btn-secondary {
  background: var(--bg-glass); color: var(--text-primary);
  border: 1px solid var(--border-glass);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); }
.btn-icon { font-size: 16px; }

/* ═══════════════════ Sections ═══════════════════ */
.section { position: relative; z-index: 1; padding: var(--section-pad) 0; }
.section-dark { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 12px;
  font-weight: 600; color: var(--accent-sam3); letter-spacing: 2px; margin-bottom: 10px;
}
.section-title { font-size: clamp(28px, 4.5vw, 42px); font-weight: 800; letter-spacing: -1px; margin-bottom: 14px; }
.section-desc { font-size: 16px; color: var(--text-secondary); max-width: 620px; margin: 0 auto; line-height: 1.7; }
.subsection-title { font-size: 22px; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.subsection-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 28px; max-width: 700px; }

/* ═══════════════════ Glass Cards ═══════════════════ */
.glass-card {
  background: var(--bg-card); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); backdrop-filter: blur(20px); overflow: hidden;
}
.card-title { font-size: 18px; font-weight: 700; padding: 22px 26px 0; }

/* ═══════════════════ Content with Figure ═══════════════════ */
.content-with-figure {
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
  align-items: center; margin-bottom: 48px;
}
.content-with-figure.reverse { direction: rtl; }
.content-with-figure.reverse > * { direction: ltr; }
.content-text h3 { font-size: 20px; font-weight: 700; margin-bottom: 14px; }
.content-text p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.7; }
.content-text p strong { color: var(--text-primary); }
.content-figure { padding: 0; }
.content-figure img { width: 100%; height: auto; display: block; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.content-figure figcaption {
  padding: 10px 16px; font-size: 12px; color: var(--text-muted); font-style: italic;
}

/* Figure gallery (2-col) */
.fig-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 40px; }
.fig-item img { width: 100%; height: auto; display: block; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.fig-item figcaption { padding: 10px 16px; font-size: 12px; color: var(--text-muted); font-style: italic; }
.fig-full { margin-bottom: 40px; padding: 20px; }
.fig-full img { border-radius: var(--radius-md); }

/* ═══════════════════ Object Catalog ═══════════════════ */
.obj-catalog { display: flex; flex-direction: column; gap: 16px; margin-top: 40px; }
.obj-group { background: var(--bg-glass); border: 1px solid var(--border-glass); border-radius: var(--radius-lg); padding: 16px 20px; }
.group-label { font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 10px; }
.obj-row { display: flex; flex-wrap: wrap; gap: 8px; }
.obj-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 14px; border-radius: 100px; font-size: 13px; font-weight: 500;
  border: 1px solid; transition: transform 0.2s var(--ease);
}
.obj-chip:hover { transform: scale(1.05); }
.obj-chip.plate { background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.3); color: #a5b4fc; }
.obj-chip.dish { background: rgba(52,211,153,0.1); border-color: rgba(52,211,153,0.3); color: var(--accent-green); }
.obj-chip.tube { background: rgba(251,191,36,0.1); border-color: rgba(251,191,36,0.3); color: var(--accent-yellow); }
.obj-chip.bottle { background: rgba(248,113,113,0.1); border-color: rgba(248,113,113,0.3); color: var(--accent-red); }
.obj-id {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 6px;
  background: rgba(255,255,255,0.1); font-family: 'JetBrains Mono', monospace;
  font-size: 10px; font-weight: 700;
}

/* ═══════════════════ Data Format Card ═══════════════════ */
.data-format-card { padding: 24px; margin-bottom: 40px; }
.dir-tree { margin-top: 12px; }
.tree-code { font-family: 'JetBrains Mono', monospace; font-size: 12.5px; line-height: 1.6; color: var(--text-secondary); overflow-x: auto; white-space: pre; }
.tree-scene { color: #f1f5f9; font-weight: 700; }
.tree-dir { color: #a78bfa; font-weight: 600; }
.tree-file { color: #38bdf8; }
.tree-json { color: #34d399; font-weight: 500; }
.tree-comment { color: var(--text-muted); font-style: italic; }

/* ═══════════════════ Method Cards ═══════════════════ */
.method-compare { display: flex; gap: 20px; margin-bottom: 32px; }
.method-card { flex: 1; padding: 28px; }
.method-header { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.method-badge { padding: 4px 14px; border-radius: 100px; font-size: 12px; font-weight: 700; color: white; }
.method-badge.sam3 { background: var(--grad-sam3); }
.method-badge.fp { background: var(--grad-fp); }
.method-type { font-size: 12px; color: var(--text-muted); }
.method-metric-big { display: flex; align-items: baseline; gap: 10px; margin-bottom: 20px; }
.metric-val { font-size: 42px; font-weight: 800; letter-spacing: -2px; }
.sam3-card .metric-val { color: var(--accent-sam3); }
.fp-card .metric-val { color: var(--accent-fp); }
.metric-name { font-size: 14px; color: var(--text-muted); font-weight: 500; }
.method-details { display: flex; flex-direction: column; gap: 6px; }
.md-row { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-secondary); padding: 5px 0; border-top: 1px solid var(--border-glass); }
.md-row span:last-child { font-weight: 600; color: var(--text-primary); }

/* ═══════════════════ Tables ═══════════════════ */
.table-card { margin-bottom: 24px; }
.table-scroll { overflow-x: auto; padding: 16px 26px 26px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left; padding: 10px 12px; font-weight: 600; color: var(--text-muted);
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border-glass); white-space: nowrap;
}
.data-table td { padding: 8px 12px; border-bottom: 1px solid rgba(255,255,255,0.03); white-space: nowrap; }
.data-table tbody tr { transition: background 0.15s; }
.data-table tbody tr:hover { background: rgba(255,255,255,0.03); }
.data-table .row-warn { background: rgba(248,113,113,0.04); }
.data-table .total-row td { border-top: 2px solid var(--border-glass); border-bottom: none; }
.val-excellent { color: var(--accent-green); font-weight: 700; }
.val-good { color: #6ee7b7; font-weight: 600; }
.val-medium { color: var(--accent-yellow); font-weight: 600; }
.val-poor { color: var(--accent-red); font-weight: 700; }

/* Insight Box */
.insight-box { display: flex; gap: 14px; padding: 16px 26px 24px; align-items: flex-start; }
.insight-icon { font-size: 22px; flex-shrink: 0; }
.insight-text { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.insight-text strong { color: var(--text-primary); }

/* ═══════════════════ Rebuttal Updates ═══════════════════ */
.section-rebuttal {
  background:
    linear-gradient(180deg, rgba(17,24,39,0.95), rgba(10,14,26,1)),
    var(--bg-primary);
}
.rebuttal-intro-card {
  padding: 0 0 22px;
  margin-bottom: 24px;
}
.rebuttal-intro-card p,
.rebuttal-summary-card p,
.table-note {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.7;
}
.rebuttal-intro-card p {
  padding: 10px 26px 0;
}
.table-note {
  padding: 8px 26px 0;
}
.rebuttal-table-card .data-table th,
.rebuttal-table-card .data-table td {
  padding: 9px 11px;
}
.rebuttal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 28px;
}
.rebuttal-summary-card {
  padding: 0 0 24px;
}
.rebuttal-summary-card p {
  padding: 10px 26px 0;
}
.mini-table {
  width: calc(100% - 52px);
  margin: 14px 26px 4px;
  border-collapse: collapse;
  font-size: 12.5px;
}
.mini-table td {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  vertical-align: top;
}
.mini-table td:first-child {
  color: var(--text-muted);
  padding-right: 18px;
  width: 42%;
}
.mini-table td:last-child {
  color: var(--text-primary);
}

/* ═══════════════════ Visualization Viewer ═══════════════════ */
.view-controls { display: flex; justify-content: flex-end; margin-bottom: 16px; }
.scene-filter {
  display: flex; gap: 4px; background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm); padding: 4px;
}
.scene-btn {
  padding: 6px 14px; border: none; background: transparent; color: var(--text-secondary);
  font-size: 12px; font-weight: 500; border-radius: 6px; cursor: pointer;
  transition: all 0.2s var(--ease); font-family: inherit;
}
.scene-btn:hover { color: var(--text-primary); }
.scene-btn.active { background: rgba(99,102,241,0.2); color: var(--text-primary); }

.vis-comparison { background: var(--bg-card); border: 1px solid var(--border-glass); border-radius: var(--radius-lg); overflow: hidden; }
.comparison-nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border-glass); }
.comp-nav-btn {
  width: 36px; height: 36px; border: 1px solid var(--border-glass); background: var(--bg-glass);
  color: var(--text-primary); font-size: 22px; border-radius: var(--radius-sm); cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all 0.2s var(--ease);
}
.comp-nav-btn:hover { background: rgba(99,102,241,0.15); }
.comp-info { text-align: center; }
.comp-counter { display: block; font-size: 13px; font-weight: 700; }
.comp-scene { font-size: 11px; color: var(--text-muted); }
.img-tab-group { display: flex; padding: 10px 20px; gap: 4px; border-bottom: 1px solid var(--border-glass); overflow-x: auto; }
.img-tab {
  padding: 6px 14px; border: none; background: transparent; color: var(--text-secondary);
  font-size: 12px; font-weight: 500; border-radius: 6px; cursor: pointer;
  transition: all 0.2s var(--ease); font-family: inherit; white-space: nowrap;
}
.img-tab:hover { color: var(--text-primary); }
.img-tab.active { background: rgba(99,102,241,0.15); color: var(--text-primary); }
.comp-viewport { padding: 16px; background: #000; }
.comp-img { width: 100%; height: auto; border-radius: var(--radius-md); display: block; }
.comp-side-by-side { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.side-panel { position: relative; }
.side-label { position: absolute; top: 8px; left: 8px; padding: 3px 10px; background: rgba(0,0,0,0.7); backdrop-filter: blur(10px); border-radius: 6px; font-size: 11px; font-weight: 600; color: white; z-index: 2; }
.side-img { width: 100%; height: auto; border-radius: var(--radius-md); display: block; }
.thumb-strip { display: flex; gap: 5px; padding: 12px 20px; overflow-x: auto; border-top: 1px solid var(--border-glass); }
.thumb-strip::-webkit-scrollbar { height: 4px; }
.thumb-strip::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }
.thumb-item { flex-shrink: 0; width: 72px; height: 45px; border-radius: 5px; overflow: hidden; cursor: pointer; border: 2px solid transparent; transition: all 0.2s var(--ease); opacity: 0.5; }
.thumb-item:hover { opacity: 0.8; }
.thumb-item.active { border-color: var(--accent-sam3); opacity: 1; }
.thumb-item img { width: 100%; height: 100%; object-fit: cover; }

/* ═══════════════════ Robot Section ═══════════════════ */
.robot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 36px; }
.robot-stat-card { padding: 28px; text-align: center; }
.robot-effector { font-size: 15px; font-weight: 600; color: var(--text-secondary); margin-bottom: 12px; }
.robot-rate { font-size: 48px; font-weight: 800; background: var(--grad-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.robot-detail { display: block; font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* Video player */
.video-card { margin-top: 36px; }
.video-container { padding: 20px; }
.video-container video {
  width: 100%; border-radius: var(--radius-md); background: #000;
  max-height: 600px; object-fit: contain;
}

/* ═══════════════════ Findings ═══════════════════ */
.findings-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.finding-card { padding: 28px; transition: transform 0.3s var(--ease), border-color 0.3s var(--ease); }
.finding-card:hover { transform: translateY(-3px); border-color: rgba(99,102,241,0.3); }
.finding-num { font-family: 'JetBrains Mono', monospace; font-size: 28px; font-weight: 800; background: var(--grad-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 12px; }
.finding-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.finding-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.finding-card p strong { color: var(--text-primary); }

/* ═══════════════════ Footer ═══════════════════ */
.footer { position: relative; z-index: 1; padding: 36px 0; border-top: 1px solid var(--border-glass); }
.footer-content { display: flex; justify-content: space-between; align-items: center; }
.footer-title { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.footer-sub { font-size: 12px; color: var(--text-muted); }
.footer-meta { text-align: right; font-size: 12px; color: var(--text-muted); }

/* ═══════════════════ Responsive ═══════════════════ */
@media (max-width: 1024px) {
  .content-with-figure { grid-template-columns: 1fr; }
  .content-with-figure.reverse { direction: ltr; }
  .fig-gallery { grid-template-columns: 1fr; }
  .method-compare { flex-direction: column; }
  .findings-grid { grid-template-columns: repeat(2, 1fr); }
  .robot-grid { grid-template-columns: 1fr; }
  .rebuttal-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  :root { --section-pad: 50px; }
  .nav-links { display: none; }
  .hero-stats { gap: 6px; }
  .stat-card { padding: 10px 14px; min-width: 80px; }
  .stat-value { font-size: 22px; }
  .findings-grid { grid-template-columns: 1fr; }
  .comp-side-by-side { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; text-align: center; gap: 12px; }
  .footer-meta { text-align: center; }
  .hero-authors { gap: 10px; }
}