:root {
  color-scheme: dark;
  --bg: #0b0e1f;
  --card: #151932;
  --card2: #1e2446;
  --text: #f7f8ff;
  --muted: #a8b0d6;
  --line: rgba(255,255,255,.13);
  --p1: #7c5cff;
  --p2: #20d6ff;
  --ok: #35d399;
  --bad: #fb7185;
  --gold: #fbbf24;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 0 0, rgba(124,92,255,.36), transparent 26rem), radial-gradient(circle at 100% 0, rgba(32,214,255,.22), transparent 24rem), var(--bg);
}
button, input { font: inherit; }
.app-shell { width: min(1040px, 100%); margin: 0 auto; padding: 18px; }
.card { background: linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.03)), var(--card); border: 1px solid var(--line); border-radius: 28px; padding: 22px; box-shadow: 0 24px 80px rgba(0,0,0,.35); }
.topbar { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:18px; flex-wrap:wrap; }
.nav { display:flex; gap:8px; flex-wrap:wrap; }
.eyebrow { color: var(--p2); font-weight: 900; letter-spacing:.08em; text-transform:uppercase; font-size:12px; margin:0 0 8px; }
h1,h2,h3,p { margin-top:0; }
h1 { font-size: clamp(34px, 8vw, 70px); line-height:.95; margin-bottom:12px; }
h2 { font-size: clamp(26px, 6vw, 44px); margin-bottom:10px; }
.muted { color: var(--muted); }
.grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); gap:12px; }
.topic,.answer,.mini { width:100%; border:1px solid var(--line); border-radius:20px; background:rgba(255,255,255,.055); color:var(--text); padding:16px; text-align:left; cursor:pointer; }
.topic:hover,.answer:hover,.mini:hover { border-color: rgba(124,92,255,.85); transform: translateY(-1px); }
.topic strong { display:block; margin-bottom:6px; }
.pill { display:inline-flex; gap:6px; align-items:center; border:1px solid var(--line); border-radius:999px; padding:7px 11px; color:var(--muted); font-size:13px; }
.btn { border:0; border-radius:999px; color:white; background:linear-gradient(135deg,var(--p1),var(--p2)); padding:12px 17px; font-weight:900; cursor:pointer; }
.btn.secondary { background:rgba(255,255,255,.08); border:1px solid var(--line); }
.btn.gold { background:linear-gradient(135deg,#f59e0b,#f97316); }
.btn-row { display:flex; flex-wrap:wrap; gap:10px; margin-top:16px; }
.answers { display:grid; gap:10px; margin-top:18px; }
.answer.correct { border-color:var(--ok); background:rgba(53,211,153,.16); }
.answer.wrong { border-color:var(--bad); background:rgba(251,113,133,.16); }
.progress { height:10px; border-radius:999px; background:rgba(255,255,255,.09); overflow:hidden; margin:14px 0; }
.progress div { height:100%; background:linear-gradient(90deg,var(--p1),var(--p2)); transition:width .2s; }
.center { text-align:center; }
.score { font-size: clamp(58px, 18vw, 118px); line-height:1; font-weight:1000; margin:8px 0; }
.leader { display:grid; gap:9px; margin-top:16px; }
.leader-row { display:grid; grid-template-columns: 40px 1fr auto; gap:10px; align-items:center; border:1px solid var(--line); background:rgba(255,255,255,.05); border-radius:16px; padding:12px; }
.paywall { border-color:rgba(251,191,36,.55); background:linear-gradient(145deg, rgba(251,191,36,.15), rgba(124,92,255,.12)), var(--card); }
.debug { margin-top:14px; color:var(--muted); font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:12px; word-break:break-all; }
.input { width:100%; border:1px solid var(--line); border-radius:16px; padding:12px 14px; background:rgba(255,255,255,.07); color:var(--text); }
@media (max-width:560px) { .card { border-radius:22px; padding:18px; } .leader-row { grid-template-columns:32px 1fr auto; } }