/* ============================================================
   GBTI Design System v2 — SBTI-inspired premium light theme
   ============================================================ */
:root {
  --bg: #f4f1eb;
  --bg-card: #ffffff;
  --bg-alt: #eae7e0;
  --text: #1a1a2e;
  --text-secondary: #6b6b7b;
  --accent: #2d6a4f;
  --accent-light: #40916c;
  --accent-bg: #d8f3dc;
  --border: #dddad3;
  --shadow: 0 2px 12px rgba(0,0,0,0.05);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --max-w: 1080px;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: #fdfcfb; color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
body::before {
  content: ""; position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(45, 106, 79, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(230, 180, 34, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(64, 145, 108, 0.07) 0%, transparent 60%),
    radial-gradient(circle at 10% 80%, rgba(52, 152, 219, 0.04) 0%, transparent 50%);
  z-index: -2; animation: bgPulse 25s ease-in-out infinite alternate; pointer-events: none;
}
body::after {
  content: ""; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
  background-image: url('data:image/svg+xml,%3Csvg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noiseFilter"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.65" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noiseFilter)"/%3E%3C/svg%3E');
  opacity: 0.04; z-index: -1; pointer-events: none;
}
@keyframes bgPulse {
  0% { transform: scale(1) rotate(0deg); }
  100% { transform: scale(1.1) rotate(5deg); }
}
a { color: var(--accent); text-decoration: none; }

/* ===== Nav ===== */
#navbar { position: sticky; top: 0; z-index: 100; background: rgba(244,241,235,.88); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: var(--max-w); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 56px; }
.logo { font-weight: 900; font-size: 1.1rem; color: var(--text); display: flex; align-items: center; gap: 6px; }
.logo small { font-weight: 500; font-size: .75rem; color: var(--text-secondary); }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: .85rem; }
.nav-links a { color: var(--text-secondary); transition: color var(--transition); }
.nav-links a:hover { color: var(--accent); }
.btn-nav { background: var(--accent); color: #fff !important; padding: 7px 18px; border-radius: 99px; font-weight: 700; transition: all var(--transition); }
.btn-nav:hover { background: var(--accent-light); transform: translateY(-1px); }

/* ===== Buttons ===== */
.btn-primary { display: inline-flex; align-items: center; gap: 6px; padding: 12px 28px; background: var(--accent); color: #fff; border: none; border-radius: 99px; font-size: .9rem; font-weight: 700; cursor: pointer; transition: all var(--transition); font-family: var(--font); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-primary:disabled { opacity: .5; cursor: default; transform: none; }
.btn-ghost { display: inline-flex; align-items: center; gap: 6px; padding: 12px 28px; background: transparent; color: var(--accent); border: 2px solid var(--accent); border-radius: 99px; font-size: .9rem; font-weight: 700; cursor: pointer; transition: all var(--transition); font-family: var(--font); }
.btn-ghost:hover { background: var(--accent-bg); }

/* ===== Views ===== */
.view { display: none; }
.view.active { display: block; animation: fadeIn .35s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ===== Hero ===== */
.hero { position: relative; z-index: 1; max-width: var(--max-w); margin: 0 auto; padding: 80px 24px 72px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.hero-label { font-size: .7rem; letter-spacing: 3px; color: var(--text-secondary); text-transform: uppercase; margin-bottom: 12px; font-weight: 500; }
.hero h1 { font-size: 2.2rem; font-weight: 900; line-height: 1.35; margin-bottom: 14px; }
.hero-desc { color: var(--text-secondary); margin-bottom: 28px; font-size: .9rem; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-stats { display: flex; gap: 36px; }
.stat strong { display: block; font-size: 1.4rem; font-weight: 900; }
.stat span { font-size: .75rem; color: var(--text-secondary); }
.hero-cards { display: flex; flex-direction: column; gap: 14px; }
.hero-card { background: var(--bg-card); border-radius: var(--radius); padding: 16px 20px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px; transition: all var(--transition); border: 1px solid var(--border); cursor: default; }
.hero-card:hover { transform: translateY(-4px) scale(1.02); box-shadow: var(--shadow-hover); }
.hero-card:nth-child(2) { margin-left: 36px; }
.hero-card:nth-child(3) { margin-left: 18px; }
.hero-card-avatar { width: 56px; height: 56px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 900; font-size: .75rem; color: #fff; flex-shrink: 0; letter-spacing: .5px; }
.hero-card-info h4 { font-size: .9rem; font-weight: 700; }
.hero-card-info p { font-size: .75rem; color: var(--text-secondary); margin-top: 1px; }
.hero-card-info .type-card-code { font-size: .65rem; }

/* ===== Sections ===== */
.section { max-width: var(--max-w); margin: 0 auto; padding: 72px 24px; }
.section h2 { font-size: 1.6rem; font-weight: 900; margin-bottom: 6px; line-height: 1.4; }
.section-sub { color: var(--text-secondary); margin-bottom: 36px; font-size: .9rem; }
.section-alt { background: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); max-width: 100%; padding: 72px 24px; }
.section-alt h2, .section-alt .section-sub { max-width: var(--max-w); margin-left: auto; margin-right: auto; }

/* Model Grid */
.model-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.model-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; transition: all var(--transition); }
.model-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.model-tag { display: inline-block; font-size: .65rem; color: var(--accent); background: var(--accent-bg); padding: 3px 9px; border-radius: 99px; margin-bottom: 10px; font-weight: 700; }
.model-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 3px; }
.model-card p { font-size: .8rem; color: var(--text-secondary); }

/* Leaderboard Preview */
.leaderboard-preview { max-width: var(--max-w); margin: 0 auto; display: grid; grid-template-columns: 280px 1fr; gap: 36px; align-items: start; }
.lb-total { text-align: left; }
.lb-label { font-size: .8rem; color: var(--text-secondary); margin-bottom: 2px; }
.lb-number { font-size: 3rem; font-weight: 900; margin-bottom: 18px; }
.lb-top3 { display: flex; flex-direction: column; gap: 10px; }
.lb-top-item { display: flex; align-items: center; gap: 14px; background: var(--bg); border-radius: var(--radius-sm); padding: 12px 18px; border: 1px solid var(--border); }
.lb-rank { font-size: .7rem; font-weight: 700; color: var(--accent); background: var(--accent-bg); padding: 3px 9px; border-radius: 99px; }
.lb-top-name { font-weight: 700; flex: 1; font-size: .9rem; }
.lb-top-count { color: var(--text-secondary); font-size: .8rem; }

/* ===== Quiz ===== */
.quiz-header { max-width: var(--max-w); margin: 0 auto; padding: 56px 24px 0; }
.quiz-header h1 { font-size: 2rem; font-weight: 900; line-height: 1.35; margin-bottom: 8px; }
.quiz-header-sub { color: var(--text-secondary); font-size: .85rem; margin-bottom: 0; }
.quiz-container { max-width: 720px; margin: 0 auto; padding: 32px 24px 80px; }
.quiz-meta { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.quiz-counter { font-size: .8rem; color: var(--accent); font-weight: 700; white-space: nowrap; }
.quiz-progress { flex: 1; height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; position: relative; }
.quiz-progress-bar { height: 100%; background: var(--accent); border-radius: 99px; transition: width .45s ease; width: 0%; position: relative; }
.quiz-progress-bar::after { content: ''; position: absolute; right: 0; top: 50%; transform: translateY(-50%); width: 14px; height: 14px; border-radius: 50%; background: var(--accent); border: 3px solid var(--bg); }
.quiz-pct { font-size: .8rem; color: var(--text-secondary); font-weight: 700; white-space: nowrap; }
.quiz-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.quiz-tags { margin-bottom: 8px; }
.quiz-tags span { display: inline-block; font-size: .65rem; padding: 3px 10px; border-radius: 99px; font-weight: 700; margin-right: 6px; }
.quiz-tags .tag-section { background: var(--accent); color: #fff; }
.quiz-tags .tag-dim { background: var(--accent-bg); color: var(--accent); }
.quiz-question { font-size: 1.25rem; font-weight: 700; margin-bottom: 28px; line-height: 1.5; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-option { display: flex; align-items: flex-start; gap: 14px; background: var(--bg); border: 2px solid transparent; border-radius: var(--radius-sm); padding: 16px 20px; font-size: .9rem; cursor: pointer; text-align: left; transition: all var(--transition); font-family: var(--font); line-height: 1.5; color: var(--text); }
.quiz-option:hover { border-color: var(--accent); background: var(--accent-bg); }
.quiz-option .opt-label { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; background: var(--border); font-size: .75rem; font-weight: 900; flex-shrink: 0; color: var(--text-secondary); transition: all var(--transition); }
.quiz-option:hover .opt-label { background: var(--accent); color: #fff; }
.quiz-option .opt-text { flex: 1; padding-top: 3px; }
.quiz-option.selected { border-color: var(--accent); background: var(--accent); color: #fff; }
.quiz-option.selected .opt-label { background: rgba(255,255,255,.25); color: #fff; }

/* ===== Result ===== */
.result-breadcrumbs { max-width: var(--max-w); margin: 0 auto; padding: 32px 24px 0; font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.result-breadcrumbs a { color: var(--text-secondary); text-decoration: none; transition: color var(--transition); }
.result-breadcrumbs a:hover { color: var(--accent); }
.result-hero { max-width: var(--max-w); margin: 0 auto; padding: 56px 24px 32px; display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; align-items: start; }
.result-hero-label { font-size: .85rem; color: var(--text-secondary); margin-bottom: 4px; }
.result-hero-name { font-size: 2.4rem; font-weight: 900; margin-bottom: 4px; }
.result-hero-code { font-size: .75rem; letter-spacing: 2px; color: var(--accent); font-weight: 700; margin-bottom: 16px; }
.result-avatar { width: 160px; height: 160px; border-radius: 20px; overflow: hidden; }
.result-avatar svg { width: 100%; height: 100%; }
.result-hero-right { padding-top: 12px; }
.result-hero-right h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.result-tagline { color: var(--text-secondary); font-style: italic; font-size: .95rem; margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.result-sketch { color: var(--text-secondary); font-size: .9rem; line-height: 1.9; }

.result-body { max-width: var(--max-w); margin: 0 auto; padding: 0 24px 80px; }
.result-section { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; margin-bottom: 20px; }
.result-section h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.result-chart-wrap { max-width: 360px; margin: 0 auto; }
.result-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin: 28px 0 10px; }
.result-submit-msg { text-align: center; font-size: .85rem; color: var(--accent); min-height: 20px; }

/* Share Card */
.result-share-section { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
.result-share-card { background: linear-gradient(135deg, var(--accent) 0%, #1b4332 100%); border-radius: var(--radius); padding: 28px; color: #fff; }
.share-card-inner { display: flex; align-items: center; gap: 18px; margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,.15); }
.share-card-avatar { width: 72px; height: 72px; border-radius: 14px; overflow: hidden; flex-shrink: 0; background: rgba(255,255,255,.15); display: flex; align-items: center; justify-content: center; font-weight: 900; font-size: .9rem; }
.share-card-label { font-size: .65rem; letter-spacing: 2px; opacity: .6; text-transform: uppercase; }
.share-card-info h3 { font-size: 1.2rem; font-weight: 900; margin: 2px 0; }
.share-card-code { font-size: .7rem; letter-spacing: 1px; opacity: .7; }
.share-card-tagline { font-size: .75rem; opacity: .8; margin-top: 4px; font-style: italic; }
.share-card-bottom { display: flex; align-items: center; gap: 14px; }
.share-card-qr { width: 80px; height: 80px; background: #fff; border-radius: 8px; padding: 6px; flex-shrink: 0; }
.share-card-qr canvas, .share-card-qr img { width: 100% !important; height: 100% !important; display: block; }
.share-card-hint { font-size: .75rem; opacity: .7; line-height: 1.5; }
.share-actions { text-align: center; }
.share-actions .btn-primary { margin-bottom: 12px; }
.share-tip { font-size: .8rem; color: var(--text-secondary); }

/* ===== Types Gallery ===== */
.types-container { max-width: var(--max-w); margin: 0 auto; padding: 56px 24px 80px; text-align: center; }
.types-container h1 { font-size: 1.8rem; font-weight: 900; margin-bottom: 4px; }
.types-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; margin-top: 24px; text-align: left; }
.type-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1); cursor: pointer; display: flex; flex-direction: column; justify-content: space-between; height: 100%; box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
.type-card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.08); border-color: rgba(0,0,0,0.08); }
.type-card-header { display: flex; align-items: center; gap: 16px; margin-bottom: 12px; }
.type-card-avatar { width: 64px; height: 64px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-weight: 900; font-size: .8rem; color: #fff; flex-shrink: 0; letter-spacing: .5px; }
.type-card-code { font-size: .75rem; color: var(--accent); font-weight: 900; letter-spacing: .5px; }
.type-card-name { font-size: 1.15rem; font-weight: 900; margin-top: 2px; }
.type-card-tagline { font-size: .85rem; color: var(--text-secondary); line-height: 1.6; padding-bottom: 4px;}
.type-card-special { display: inline-block; font-size: .6rem; background: #fff3cd; color: #856404; padding: 2px 7px; border-radius: 99px; margin-left: 6px; font-weight: 700; vertical-align: middle; }
.type-card-action { margin-top: auto; font-size: .85rem; font-weight: 700; color: var(--accent); padding-top: 16px; border-top: 1px solid var(--bg-alt); display: flex; justify-content: flex-end; align-items: center; transition: opacity .2s; opacity: 0.6; }
.type-card:hover .type-card-action { opacity: 1; }

/* ===== Leaderboard Full ===== */
.lb-page-container { max-width: var(--max-w); margin: 0 auto; padding: 56px 24px 80px; }
.lb-page-container h1 { font-size: 1.8rem; font-weight: 900; margin-bottom: 4px; }
.lb-stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 28px 0; }
.lb-stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; }
.lb-stat-label { font-size: .75rem; color: var(--text-secondary); margin-bottom: 4px; }
.lb-stat-value { font-size: 1.8rem; font-weight: 900; }
.lb-stat-time { font-size: 1rem; }
.lb-top3-full { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 40px; }
.lb-top3-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; }
.lb-top3-card .lb-rank { margin-bottom: 8px; display: inline-block; }
.lb-top3-card h3 { font-size: 1.15rem; font-weight: 900; margin-bottom: 2px; }
.lb-top3-card .lb-top3-code { font-size: .7rem; color: var(--accent); font-weight: 700; letter-spacing: 1px; }
.lb-top3-card .lb-top3-stat { font-size: .8rem; color: var(--text-secondary); margin-top: 8px; }
.lb-full-table { margin-top: 16px; }
.lb-table-header { margin-bottom: 20px; }
.lb-table-header h2 { font-size: 1.3rem; font-weight: 900; }
.lb-table { width: 100%; border-collapse: collapse; }
.lb-table th { font-size: .7rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-secondary); padding: 10px 16px; border-bottom: 2px solid var(--border); text-align: left; }
.lb-table td { padding: 14px 16px; border-bottom: 1px solid var(--border); font-size: .9rem; }
.lb-table tr:hover td { background: rgba(45,106,79,.04); }
.lb-table .lb-cell-name { font-weight: 700; }
.lb-table .lb-cell-code { font-size: .7rem; color: var(--accent); font-weight: 700; display: block; margin-top: 1px; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 48px 24px 32px; background: var(--bg-card); }
.footer-inner { max-width: var(--max-w); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-bottom: 28px; }
.footer-col p { font-size: .8rem; color: var(--text-secondary); margin-bottom: 6px; line-height: 1.7; }
.footer-col strong { color: var(--text); font-size: .9rem; }
.footer-bottom { max-width: var(--max-w); margin: 0 auto; padding-top: 16px; border-top: 1px solid var(--border); font-size: .8rem; color: var(--text-secondary); }
.footer-bottom a { color: var(--text-secondary); margin: 0 4px; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero { grid-template-columns: 1fr; padding-top: 40px; gap: 32px; }
  .hero h1 { font-size: 1.8rem; }
  .hero-cards { order: -1; }
  .hero-card:nth-child(2), .hero-card:nth-child(3) { margin-left: 0; }
  .leaderboard-preview { grid-template-columns: 1fr; gap: 24px; }
  .nav-inner { padding: 0 16px; }
  .nav-links { gap: 12px; font-size: .75rem; }
  .section, .section-alt { padding: 48px 16px; }
  .quiz-header { padding: 32px 16px 0; }
  .quiz-header h1 { font-size: 1.5rem; }
  .quiz-container { padding: 24px 16px 56px; }
  .quiz-card { padding: 24px 16px; }
  .quiz-question { font-size: 1.1rem; margin-bottom: 20px; }
  .quiz-option { padding: 12px 14px; font-size: .85rem; }
  .result-hero { grid-template-columns: 1fr; padding-top: 32px; gap: 24px; }
  .result-hero-name { font-size: 2rem; }
  .result-avatar { width: 120px; height: 120px; margin: 0 auto; }
  .result-hero-left { text-align: center; }
  .result-body { padding: 0 16px 56px; }
  .result-share-section { grid-template-columns: 1fr; gap: 24px; }
  .result-share-card { padding: 20px; }
  .share-card-inner { flex-direction: column; text-align: center; gap: 12px; padding-bottom: 16px; margin-bottom: 16px; }
  .share-card-bottom { flex-direction: column; text-align: center; }
  .types-grid { grid-template-columns: 1fr; }
  .lb-page-container { padding: 32px 16px 56px; }
  .lb-stats-grid, .lb-top3-full { grid-template-columns: 1fr; gap: 12px; }
  .lb-top3-card { padding: 16px; }
  .lb-table th, .lb-table td { padding: 10px; font-size: .8rem; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  footer { padding: 32px 16px 24px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .hero-stats { gap: 16px; justify-content: space-between; }
  .stat strong { font-size: 1.2rem; }
  .nav-links span { display: none; } /* Hide text if needed, maybe just hide types or limit links */
  .nav-links a[data-view="types"], .nav-links a[data-view="leaderboard"] { display: none; } /* Simplify nav on very small screens */
  .btn-nav { padding: 5px 12px; font-size: .8rem; }
  .logo { font-size: 1rem; }
  .model-grid { grid-template-columns: 1fr; }
  .lb-number { font-size: 2.2rem; }
  .quiz-progress-bar::after { width: 10px; height: 10px; }
  .result-sketch { font-size: .85rem; }
}

/* ===== Animations ===== */
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
.quiz-option { animation: slideUp .25s ease both; }
.quiz-option:nth-child(1) { animation-delay: .04s; }
.quiz-option:nth-child(2) { animation-delay: .08s; }
.quiz-option:nth-child(3) { animation-delay: .12s; }
.quiz-option:nth-child(4) { animation-delay: .16s; }