/* ─────────────────────────────────────────────────
   RCC·AI — Premium Dark Theme Stylesheet
   ───────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* CRITICAL UTILITY */
.hidden { display: none !important; }

:root {
  --bg:          #090b10;
  --bg2:         #0d1117;
  --bg3:         #141820;
  --bg4:         #1a1f2e;
  --nav-bg:      rgba(9,11,16,0.85);
  --hero-grad:   linear-gradient(180deg, #0a0d15 0%, #090b10 100%);
  --border:      rgba(255,255,255,0.07);
  --border2:     rgba(255,255,255,0.12);
  --accent:      #6366f1;        /* indigo */
  --accent2:     #8b5cf6;        /* purple */
  --gold:        #f59e0b;
  --gold2:       #fbbf24;
  --green:       #10b981;
  --yellow:      #f59e0b;
  --red:         #ef4444;
  --text:        #e2e8f0;
  --text2:       #94a3b8;
  --text3:       #64748b;
  --radius:      14px;
  --radius-sm:   8px;
  --shadow:      0 4px 24px rgba(0,0,0,0.5);
  --glow-accent: 0 0 40px rgba(99,102,241,0.15);
}

[data-theme="light"] {
  --bg:          #f8fafc;
  --bg2:         #f1f5f9;
  --bg3:         #ffffff;
  --bg4:         #f8fafc;
  --nav-bg:      rgba(255,255,255,0.92);
  --hero-grad:   linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
  --border:      rgba(0,0,0,0.1);
  --border2:     rgba(0,0,0,0.2);
  --accent:      #4f46e5;
  --accent2:     #7c3aed;
  --gold:        #d97706;
  --gold2:       #b45309;
  --green:       #059669;
  --text:        #0f172a;
  --text2:       #334155;
  --text3:       #64748b;
  --shadow:      0 4px 24px rgba(0,0,0,0.08);
}

/* Light mode specific overrides */
[data-theme="light"] body { color: #0f172a; }
[data-theme="light"] .nav-logo { color: #4f46e5; filter: drop-shadow(0 0 8px rgba(79,70,229,0.4)); }
[data-theme="light"] .hero-glow { background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, transparent 70%); }
[data-theme="light"] .hero-badge { background: rgba(79,70,229,0.08); color: #4f46e5; border-color: rgba(79,70,229,0.3); }
[data-theme="light"] .hero-stats { background: #ffffff; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
[data-theme="light"] .stat-val { color: #4f46e5; }
[data-theme="light"] .panel-icon { filter: drop-shadow(0 0 4px rgba(0,0,0,0.15)); }
[data-theme="light"] .card { background: #ffffff; box-shadow: 0 1px 6px rgba(0,0,0,0.06); }
[data-theme="light"] .upload-card { background: #ffffff; box-shadow: 0 1px 6px rgba(0,0,0,0.06); }
[data-theme="light"] .upload-zone { background: #f8fafc; border-color: rgba(0,0,0,0.15); }
[data-theme="light"] .upload-zone:hover { background: rgba(79,70,229,0.05); border-color: #4f46e5; }
[data-theme="light"] .result-panel { background: #ffffff; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
[data-theme="light"] .prob-bar-bg { background: #e2e8f0; }
[data-theme="light"] .site-card { background: #f1f5f9; }
[data-theme="light"] .fusion-card { background: #f1f5f9; }
[data-theme="light"] .premium-fusion-card { background: linear-gradient(145deg, rgba(217,119,6,0.06) 0%, rgba(217,119,6,0.14) 100%); }
[data-theme="light"] .premium-details { background: #f1f5f9; }
[data-theme="light"] .mode-btn { background: #f1f5f9; color: #334155; }
[data-theme="light"] .mode-btn.active { background: rgba(79,70,229,0.08); color: #0f172a; }
[data-theme="light"] .pill { color: #334155; background: #f1f5f9; }
[data-theme="light"] .pill:hover, [data-theme="light"] .pill.active { color: #0f172a; background: #e2e8f0; }
[data-theme="light"] .pill-gold { color: #d97706; border-color: rgba(217,119,6,0.4); background: transparent; }
[data-theme="light"] .pill-gold:hover, [data-theme="light"] .pill-gold.active { background: rgba(217,119,6,0.08); }
[data-theme="light"] .btn-demo, [data-theme="light"] .btn-clear { background: #f1f5f9; color: #334155; }
[data-theme="light"] .spinner { border-color: rgba(0,0,0,0.12); border-top-color: #4f46e5; }
[data-theme="light"] .gene-input { background: #f1f5f9; color: #0f172a; }
[data-theme="light"] .gene-label { color: #4f46e5; }
[data-theme="light"] .ftab { background: #f1f5f9; color: #334155; }
[data-theme="light"] .ftab.active { background: rgba(79,70,229,0.08); color: #0f172a; }
[data-theme="light"] .wf-text { color: #334155; }
[data-theme="light"] .instruction-box { background: rgba(79,70,229,0.05); border-color: rgba(79,70,229,0.2); }
[data-theme="light"] .format-info-item { background: #f1f5f9; color: #334155; }
[data-theme="light"] .footer { background: #f1f5f9; }
[data-theme="light"] .footer-table td { color: #334155; }
[data-theme="light"] .footer-list li { color: #334155; }

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── HERO ─── */
.hero {
  position: relative;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99,102,241,0.18) 0%, transparent 70%),
              var(--hero-grad);
  padding: 0 0 60px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(99,102,241,0.12) 0%, transparent 70%);
  pointer-events: none;
}

/* ─── NAV ─── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  position: sticky; top: 0;
  z-index: 100;
  background: var(--nav-bg);
}

.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-logo { font-size: 28px; color: var(--accent); filter: drop-shadow(0 0 10px var(--accent)); }
.nav-title { font-size: 20px; font-weight: 800; letter-spacing: -0.5px; }
.nav-title .accent { color: var(--accent); }

.nav-pills { display: flex; gap: 8px; }
.pill {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px; font-weight: 500;
  text-decoration: none;
  color: var(--text2);
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.pill:hover, .pill.active {
  color: var(--text);
  background: var(--bg4);
  border-color: var(--border2);
}
.pill-gold { border-color: rgba(245,158,11,0.4); color: var(--gold); }
.pill-gold:hover, .pill-gold.active {
  background: rgba(245,158,11,0.1);
  border-color: var(--gold);
  color: var(--gold2);
}

/* ─── HERO CONTENT ─── */
.hero-content {
  max-width: 900px;
  margin: 70px auto 0;
  text-align: center;
  padding: 0 24px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(99,102,241,0.4);
  background: rgba(99,102,241,0.1);
  border-radius: 100px;
  font-size: 12px; font-weight: 600;
  color: #a5b4fc;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(36px, 5vw, 62px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 50%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text2);
  line-height: 1.7;
  max-width: 680px;
  margin: 0 auto 40px;
}
.hero-subtitle strong { color: var(--text); }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 0;
  max-width: 600px;
  margin: 0 auto;
}
.stat { flex: 1; text-align: center; }
.stat-val { display: block; font-size: 28px; font-weight: 800; color: var(--accent); letter-spacing: -0.5px; }
.stat-lbl { display: block; font-size: 12px; color: var(--text3); margin-top: 4px; font-weight: 500; }
.stat-div { width: 1px; height: 40px; background: var(--border); }

/* ─── MAIN ─── */
.main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 32px 80px;
}

/* ─── TAB PANELS ─── */
.tab-panel { animation: fadeUp 0.3s ease; }
.tab-panel.hidden { display: none !important; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── PANEL HEADER ─── */
.panel-header {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 36px;
}
.panel-icon { font-size: 42px; line-height: 1; }
.panel-title { font-size: 26px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 6px; }
.panel-desc { color: var(--text2); font-size: 15px; line-height: 1.6; }
.panel-desc strong { color: var(--text); }

/* ─── CARDS ─── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--border2); }
.card.full-card { grid-column: 1 / -1; }

.card-title { font-size: 15px; font-weight: 600; color: var(--text2); margin-bottom: 18px; letter-spacing: 0.3px; text-transform: uppercase; font-size: 12px; }

/* ─── FORM ─── */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  margin-bottom: 6px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

/* ─── GENE GRID ─── */
.gene-instructions { margin-bottom: 24px; }
.instruction-box {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: rgba(99,102,241,0.06);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.inst-icon { font-size: 24px; }
.instruction-box strong { color: var(--text); display: block; margin-bottom: 4px; }
.instruction-box p { color: var(--text2); font-size: 13px; line-height: 1.6; }

.gene-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  max-height: 480px;
  overflow-y: auto;
  padding-right: 8px;
}
.gene-grid::-webkit-scrollbar { width: 6px; }
.gene-grid::-webkit-scrollbar-track { background: var(--bg); }
.gene-grid::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }

.gene-item { display: flex; flex-direction: column; gap: 4px; }
.gene-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.gene-input {
  width: 100%;
  padding: 8px 10px;
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
  transition: border-color 0.2s;
}
.gene-input:focus { border-color: var(--accent); }

/* ─── PREDICT BAR ─── */
.predict-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 28px 0 24px;
  flex-wrap: wrap;
}

.btn-predict {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}
.btn-predict:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(99,102,241,0.5); }
.btn-predict:active { transform: translateY(0); }

.btn-predict.btn-gold {
  background: linear-gradient(135deg, var(--gold) 0%, #d97706 100%);
  box-shadow: 0 4px 20px rgba(245,158,11,0.4);
}
.btn-predict.btn-gold:hover { box-shadow: 0 6px 28px rgba(245,158,11,0.5); }

.btn-demo, .btn-clear {
  padding: 12px 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-demo:hover, .btn-clear:hover {
  border-color: var(--border2);
  color: var(--text);
}

.btn-icon { font-size: 16px; }

/* ─── RESULT PANEL ─── */
.result-panel {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  animation: fadeUp 0.3s ease;
}
.result-panel.hidden { display: none; }

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.result-title { font-size: 18px; font-weight: 700; }

.risk-badge {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.risk-badge.high    { background: rgba(239,68,68,0.15);  color: #f87171; border: 1px solid rgba(239,68,68,0.3); }
.risk-badge.moderate{ background: rgba(245,158,11,0.15); color: #fbbf24; border: 1px solid rgba(245,158,11,0.3); }
.risk-badge.low     { background: rgba(16,185,129,0.15); color: #34d399; border: 1px solid rgba(16,185,129,0.3); }

/* ─── PROBABILITY BARS ─── */
.prob-grid { display: grid; gap: 16px; }

.prob-item { }
.prob-header { display: flex; justify-content: space-between; margin-bottom: 8px; }
.prob-label { font-size: 13px; font-weight: 500; color: var(--text2); }
.prob-value { font-size: 14px; font-weight: 700; font-family: 'JetBrains Mono', monospace; }
.prob-value.high     { color: #f87171; }
.prob-value.moderate { color: #fbbf24; }
.prob-value.low      { color: #34d399; }

.prob-bar-bg {
  height: 8px;
  background: var(--bg4);
  border-radius: 4px;
  overflow: hidden;
}
.prob-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.prob-bar-fill.high     { background: linear-gradient(90deg, #ef4444, #f87171); }
.prob-bar-fill.moderate { background: linear-gradient(90deg, #d97706, #fbbf24); }
.prob-bar-fill.low      { background: linear-gradient(90deg, #059669, #34d399); }

/* ─── SITE SPECIFIC GRID ─── */
.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.site-card {
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.site-icon { font-size: 24px; margin-bottom: 8px; }
.site-name { font-size: 12px; color: var(--text3); margin-bottom: 8px; font-weight: 500; }
.site-prob { font-size: 22px; font-weight: 800; font-family: 'JetBrains Mono', monospace; }

/* ─── FUSION RESULT GRID ─── */
.fusion-result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.fusion-card {
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: border-color 0.2s;
}
.fusion-card.winner { border-color: rgba(245,158,11,0.5); box-shadow: 0 0 20px rgba(245,158,11,0.08); }
.fusion-card-label { font-size: 11px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.fusion-card-name  { font-size: 13px; font-weight: 600; color: var(--text2); margin-bottom: 12px; }
.fusion-card-prob  { font-size: 36px; font-weight: 800; font-family: 'JetBrains Mono', monospace; }
.fusion-winner-tag { display: inline-block; margin-top: 8px; padding: 2px 10px; background: rgba(245,158,11,0.2); color: var(--gold); border-radius: 100px; font-size: 11px; font-weight: 700; }

/* ─── FUSION TABS ─── */
.fusion-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.ftab {
  padding: 10px 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.ftab.active, .ftab:hover { border-color: var(--accent); color: var(--text); background: rgba(99,102,241,0.1); }
.f-panel { margin-bottom: 20px; }
.f-panel.hidden { display: none; }

/* ─── FOOTER ─── */
.footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 48px 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
}
.footer-block h4 { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }

.footer-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.footer-table th { color: var(--text3); font-weight: 600; padding: 6px 10px; text-align: left; border-bottom: 1px solid var(--border); }
.footer-table td { padding: 8px 10px; color: var(--text2); border-bottom: 1px solid var(--border); }
.footer-table .highlight-row td { color: var(--gold); }

.footer-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-list li { font-size: 14px; color: var(--text2); }
.footer-list li strong { color: var(--text); }

.footer-note { font-size: 13px; color: var(--text3); line-height: 1.7; }
.footer-note strong { color: var(--text2); }
.footer-note em { color: #f87171; font-style: normal; }

/* ─── LOADING ─── */
.loading-overlay {
  position: fixed; inset: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 9999;
}
.loading-overlay p { color: var(--text2); font-size: 16px; }
.spinner {
  width: 48px; height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-box {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: var(--radius-sm);
  padding: 16px;
  color: #f87171;
  font-size: 14px;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .nav { padding: 16px 20px; flex-direction: column; gap: 12px; }
  .nav-pills { flex-wrap: wrap; justify-content: center; }
  .main { padding: 32px 20px; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .stat-div { display: none; }
}

/* ─── MODE SWITCHER ─── */
.mode-switcher {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.mode-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'Inter', sans-serif;
}
.mode-btn:hover { border-color: var(--accent); color: var(--text); }
.mode-btn.active {
  border-color: var(--accent);
  background: rgba(99,102,241,0.1);
  color: var(--text);
}
.mode-badge {
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  background: rgba(16,185,129,0.15);
  color: #34d399;
  border: 1px solid rgba(16,185,129,0.3);
}

/* ─── UPLOAD CARD ─── */
.upload-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 0;
}

/* ─── DRAG & DROP ZONE ─── */
.upload-zone {
  border: 2px dashed var(--border2);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg4);
  margin-bottom: 16px;
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.06);
}
.upload-icon { font-size: 40px; margin-bottom: 12px; }
.upload-title { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.upload-sub { font-size: 13px; color: var(--text3); }

/* ─── UPLOAD PAIR (CT + Mask) ─── */
.upload-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.upload-half {}
@media (max-width: 640px) { .upload-pair { grid-template-columns: 1fr; } }

/* ─── FILE NAME DISPLAY ─── */
.file-name-display {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  color: #34d399;
  font-family: 'JetBrains Mono', monospace;
  margin-top: 8px;
}

/* ─── FORMAT CHIPS ─── */
.upload-formats { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.format-chip {
  padding: 4px 12px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: #a5b4fc;
}

/* ─── FORMAT INFO ─── */
.upload-formats-info { display: flex; flex-direction: column; gap: 12px; margin: 16px 0; }
.format-info-item {
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-size: 13px;
  color: var(--text2);
  line-height: 1.6;
}
.format-info-item strong { color: var(--text); display: block; margin-bottom: 4px; }
.format-info-item code {
  display: inline-block;
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--gold);
  margin: 4px 0;
}

/* ─── WORKFLOW STEPS ─── */
.workflow-steps {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--bg4);
  border-radius: var(--radius-sm);
}
.wf-step {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 120px;
}
.wf-num {
  width: 28px; height: 28px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800;
  flex-shrink: 0;
}
.wf-text { font-size: 12px; color: var(--text2); line-height: 1.4; }
.wf-text strong { color: var(--text); }
.wf-arrow { color: var(--text3); font-size: 18px; flex-shrink: 0; }

/* ─── UPLOAD NOTE ─── */
.upload-note {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(245,158,11,0.07);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text2);
}
.upload-note strong { color: var(--gold); }

/* ─── DOWNLOAD BUTTON ─── */
.upload-actions { margin-top: 16px; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-download:hover { border-color: var(--accent); color: var(--text); }

/* ─── PREMIUM FUSION UI ─── */
.premium-fusion-card {
  background: linear-gradient(145deg, rgba(245,158,11,0.05) 0%, rgba(245,158,11,0.15) 100%);
  border: 1px solid rgba(245,158,11,0.4);
  box-shadow: 0 0 30px rgba(245,158,11,0.15), inset 0 0 20px rgba(245,158,11,0.05);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  animation: pulseGlow 3s infinite alternate;
}
@keyframes pulseGlow {
  0% { box-shadow: 0 0 30px rgba(245,158,11,0.15); }
  100% { box-shadow: 0 0 45px rgba(245,158,11,0.25); }
}
.premium-fusion-card::before {
  content: '';
  position: absolute; top: 0; left: -100%; width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
  animation: shimmer 4s infinite linear;
}
@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 200%; }
}
.premium-details {
  margin-top: 24px;
  cursor: pointer;
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  transition: all 0.3s ease;
}
.premium-details:hover {
  border-color: var(--border2);
  background: rgba(255,255,255,0.03);
}
.premium-details summary {
  font-weight: 600;
  font-size: 14px;
  color: var(--text2);
  outline: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.premium-details summary:hover { color: var(--text); }

/* ─── MODEL INFO CHIPS ─── */
.model-info-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 20px;
}
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  background: rgba(99,102,241,0.10);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.2px;
  white-space: nowrap;
}

/* ─── SITE SECTION HEADER ─── */
.site-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 24px 0 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.disclaimer-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text3);
  font-size: 12px;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.2s;
}
.disclaimer-toggle:hover {
  border-color: #f59e0b;
  color: #f59e0b;
}

/* ─── DISCLAIMER BOX ─── */
.site-disclaimer {
  margin-bottom: 16px;
}
.site-disclaimer.hidden {
  display: none;
}
.disclaimer-box {
  background: rgba(245,158,11,0.06);
  border: 1px solid rgba(245,158,11,0.30);
  border-left: 3px solid #f59e0b;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--text2);
}
.disclaimer-box strong {
  display: block;
  margin-bottom: 6px;
  color: #f59e0b;
  font-size: 13px;
}
.disclaimer-box p {
  margin: 0;
}

/* Fusion Split Layout */
.fusion-split-layout {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 20px;
  align-items: start;
}

@media (max-width: 900px) {
  .fusion-split-layout {
    grid-template-columns: 1fr;
  }
}

.fusion-sidebar {
  position: sticky;
  top: 20px;
}

.fusion-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Niivue 3D Viewer Layout */
.imaging-split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: stretch;
}

@media (max-width: 900px) {
  .imaging-split-layout {
    grid-template-columns: 1fr;
  }
}

.niivue-container {
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--accent);
  min-height: 300px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.2);
}

.niivue-container canvas {
  width: 100% !important;
  height: 100% !important;
  outline: none;
}