:root {
  --bg: #0f0f0f; --surface: #1a1a1a; --surface2: #242424; --border: #2e2e2e;
  --accent: #25D366; --accent2: #128C7E; --red: #e31b23; --gold: #FFD700;
  --text: #f0f0f0; --text2: #999; --text3: #666;
  --radius: 14px; --font: 'Inter', sans-serif; --font-h: 'Outfit', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; }
.topbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(15,15,15,0.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.topbar-inner { max-width: 960px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; height: 60px; gap: 24px; }
.topbar-brand { font-family: var(--font-h); font-size: 1.15rem; font-weight: 800; color: var(--accent); white-space: nowrap; }
.topbar-brand span { color: var(--text); font-weight: 700; }
.topbar-tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; }
.topbar-tabs::-webkit-scrollbar { display: none; }
.tab-btn { background: none; border: none; color: var(--text2); font-family: var(--font); font-size: 0.82rem; font-weight: 500; padding: 8px 14px; border-radius: 8px; cursor: pointer; white-space: nowrap; transition: 0.2s; }
.tab-btn:hover { color: var(--text); background: var(--surface); }
.tab-btn.active { color: var(--accent); background: rgba(37,211,102,0.1); }
.main { max-width: 960px; margin: 0 auto; padding: 80px 20px 60px; }
.section { display: none; animation: fadeIn 0.3s ease; }
.section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.section-title { font-family: var(--font-h); font-size: 1.6rem; font-weight: 800; margin-bottom: 8px; }
.section-desc { color: var(--text2); font-size: 0.92rem; margin-bottom: 28px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; }
.card-header { padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; gap: 12px; }
.card-header:hover { background: var(--surface2); }
.card-label { display: flex; align-items: center; gap: 10px; }
.card-emoji { font-size: 1.3rem; }
.card-title { font-weight: 600; font-size: 0.95rem; }
.card-tag { font-size: 0.7rem; font-weight: 600; padding: 3px 8px; border-radius: 6px; text-transform: uppercase; letter-spacing: 0.3px; }
.tag-green { background: rgba(37,211,102,0.15); color: var(--accent); }
.tag-red { background: rgba(227,27,35,0.15); color: var(--red); }
.tag-gold { background: rgba(255,215,0,0.15); color: var(--gold); }
.tag-blue { background: rgba(59,130,246,0.15); color: #60a5fa; }
.card-chevron { color: var(--text3); transition: transform 0.25s ease; font-size: 0.9rem; }
.card.open .card-chevron { transform: rotate(180deg); }
.card-body { display: none; padding: 0 20px 16px; }
.card.open .card-body { display: block; }
.msg-block { background: var(--surface2); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 12px; position: relative; white-space: pre-wrap; font-size: 0.88rem; line-height: 1.65; color: var(--text); }
.msg-block .msg-note { display: block; color: var(--text3); font-size: 0.78rem; font-style: italic; margin-bottom: 8px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.copy-btn { position: absolute; top: 10px; right: 10px; background: var(--accent); color: #fff; border: none; padding: 6px 12px; border-radius: 8px; font-size: 0.75rem; font-weight: 600; cursor: pointer; font-family: var(--font); transition: 0.2s; display: flex; align-items: center; gap: 4px; }
.copy-btn:hover { background: var(--accent2); transform: scale(1.05); }
.copy-btn.copied { background: #333; }
.tip-box { background: rgba(37,211,102,0.08); border: 1px solid rgba(37,211,102,0.2); border-radius: 10px; padding: 14px 16px; margin-bottom: 16px; font-size: 0.85rem; color: var(--accent); }
.warn-box { background: rgba(227,27,35,0.08); border: 1px solid rgba(227,27,35,0.2); border-radius: 10px; padding: 14px 16px; margin-bottom: 16px; font-size: 0.85rem; color: var(--red); }
.obj-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin-bottom: 12px; }
.obj-table th { text-align: left; padding: 10px 12px; background: var(--surface2); color: var(--text2); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
.obj-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.obj-table td:first-child { color: var(--red); font-weight: 600; white-space: nowrap; width: 180px; }
.rules-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.rule-card { background: var(--surface2); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.rule-card .rule-num { font-family: var(--font-h); font-size: 1.3rem; font-weight: 800; color: var(--accent); margin-bottom: 4px; }
.rule-card .rule-text { font-size: 0.85rem; color: var(--text2); }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(80px); background: var(--accent); color: #fff; padding: 12px 24px; border-radius: 50px; font-size: 0.88rem; font-weight: 600; z-index: 999; transition: transform 0.3s ease; pointer-events: none; }
.toast.show { transform: translateX(-50%) translateY(0); }
@media(max-width:640px) {
  .topbar-inner { gap: 12px; }
  .topbar-brand { font-size: 1rem; }
  .tab-btn { font-size: 0.75rem; padding: 6px 10px; }
  .section-title { font-size: 1.3rem; }
  .obj-table td:first-child { width: auto; }
  .rules-grid { grid-template-columns: 1fr; }
}