:root{
  --indigo:#1b1f3b; --indigo-2:#2a2f57; --indigo-soft:#3a4066;
  --amber:#f5b301; --amber-2:#ffcb3d; --amber-ink:#5a4200;
  --cream:#fbf7ee; --card:#ffffff; --line:#ece6d8;
  --ink:#1b1f3b; --muted:#71768d; --muted-2:#9a9fb2;
  --good:#1f9d6b; --good-bg:#e7f6ef; --bad:#e0563f; --bad-bg:#fdece8;
  --shadow:0 10px 30px rgba(27,31,59,.10); --shadow-sm:0 4px 14px rgba(27,31,59,.08);
  --r:18px; --r-sm:12px;
  font-family:"Manrope",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--cream);color:var(--ink);-webkit-font-smoothing:antialiased}
body{line-height:1.5}
button{font-family:inherit;cursor:pointer;border:none;background:none}
img{max-width:100%;display:block}

#app{max-width:540px;margin:0 auto;min-height:100vh;background:var(--cream);
  display:flex;flex-direction:column;position:relative;overflow:hidden}
@media(min-width:560px){#app{box-shadow:var(--shadow);min-height:100vh}}

/* ---------- header ---------- */
.hd{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;
  position:sticky;top:0;z-index:20;background:rgba(251,247,238,.86);backdrop-filter:blur(10px)}
.hd .brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:-.02em}
.hd .brand img{width:30px;height:30px;border-radius:8px}
.hd .brand b{color:var(--indigo)}
.hd .brand i{font-style:normal;color:var(--amber);}
.lang{display:flex;background:#efe9db;border-radius:999px;padding:3px}
.lang button{padding:6px 12px;border-radius:999px;font-weight:700;font-size:13px;color:var(--muted)}
.lang button.on{background:var(--indigo);color:#fff}

main{flex:1;padding:0 18px 40px}

/* ---------- home ---------- */
.hero{margin:4px -18px 0;position:relative}
.hero img{width:100%;aspect-ratio:16/9;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,transparent 55%,var(--cream))}
.h-wrap{margin-top:-40px;position:relative;z-index:2;text-align:center;padding:0 6px}
.badge{display:inline-block;background:var(--amber);color:var(--amber-ink);font-weight:800;
  font-size:12px;letter-spacing:.02em;padding:6px 12px;border-radius:999px;margin-bottom:12px}
h1{font-size:30px;line-height:1.12;letter-spacing:-.03em;font-weight:800;margin-bottom:10px}
h1 .hl{color:var(--amber);}
.lede{color:var(--muted);font-size:15.5px;max-width:400px;margin:0 auto 20px}
.cta{display:block;width:100%;background:var(--indigo);color:#fff;font-weight:800;font-size:17px;
  padding:16px;border-radius:var(--r);box-shadow:var(--shadow-sm);transition:transform .12s}
.cta:active{transform:scale(.98)}
.cta.amber{background:var(--amber);color:var(--indigo)}
.cta .sub{display:block;font-weight:600;font-size:12.5px;opacity:.75;margin-top:2px}
.cta-row{display:flex;flex-direction:column;gap:11px;margin-top:6px}

.stats{display:flex;gap:10px;margin:22px 0 6px}
.stat{flex:1;background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px;text-align:center}
.stat b{display:block;font-size:22px;color:var(--indigo);letter-spacing:-.02em}
.stat span{font-size:11.5px;color:var(--muted);line-height:1.25;display:block;margin-top:2px}

.sec-title{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;
  color:var(--muted-2);margin:26px 2px 12px}
.why{display:flex;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:15px;margin-bottom:11px}
.why .ic{width:40px;height:40px;flex:none;border-radius:11px;background:#fff5da;color:var(--amber-ink);
  display:grid;place-items:center;font-size:20px}
.why h3{font-size:15.5px;margin-bottom:2px}
.why p{font-size:13.5px;color:var(--muted)}

.foot{text-align:center;color:var(--muted-2);font-size:12px;margin-top:26px;line-height:1.6}
.foot a{color:var(--muted)}

/* ---------- section picker ---------- */
.pick{display:grid;gap:11px;margin-top:8px}
.pick button{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);padding:16px;text-align:left;transition:transform .1s,border-color .1s}
.pick button:active{transform:scale(.99)}
.pick .em{width:44px;height:44px;flex:none;border-radius:12px;background:var(--indigo);color:var(--amber-2);
  display:grid;place-items:center;font-size:22px;font-weight:700}
.pick .tx{flex:1}
.pick .tx b{font-size:16px;display:block}
.pick .tx span{font-size:12.5px;color:var(--muted)}
.pick .ar{color:var(--muted-2);font-size:20px}

/* ---------- quiz ---------- */
.qbar{display:flex;align-items:center;gap:12px;padding:12px 0 6px;position:sticky;top:58px;
  background:var(--cream);z-index:10}
.back{font-size:22px;color:var(--muted);line-height:1;padding:4px}
.prog{flex:1;height:8px;background:#eae4d5;border-radius:99px;overflow:hidden}
.prog i{display:block;height:100%;background:var(--amber);border-radius:99px;transition:width .3s}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:15px;color:var(--indigo);
  background:#efe9db;padding:5px 10px;border-radius:99px;min-width:62px;text-align:center}
.timer.warn{background:var(--bad-bg);color:var(--bad)}

.qmeta{display:flex;justify-content:space-between;align-items:center;margin:16px 0 8px}
.qmeta .tag{font-size:11.5px;font-weight:800;letter-spacing:.03em;text-transform:uppercase;
  color:var(--amber-ink);background:#fff5da;padding:5px 10px;border-radius:99px}
.qmeta .n{font-size:13px;color:var(--muted-2);font-weight:700}

.passage{background:#f4efe3;border-left:4px solid var(--amber);border-radius:10px;
  padding:13px 15px;font-size:14.5px;color:#43485f;margin-bottom:14px;line-height:1.55}
.qtext{font-size:19px;font-weight:700;line-height:1.35;letter-spacing:-.01em;margin-bottom:18px}

.opts{display:grid;gap:10px}
.opt{display:flex;align-items:center;gap:13px;background:var(--card);border:1.5px solid var(--line);
  border-radius:14px;padding:14px 15px;text-align:left;font-size:15.5px;transition:all .12s}
.opt:active{transform:scale(.99)}
.opt .k{width:28px;height:28px;flex:none;border-radius:8px;background:#efe9db;color:var(--muted);
  font-weight:800;display:grid;place-items:center;font-size:14px}
.opt .lbl{flex:1}
.opt.sel{border-color:var(--indigo)}
.opt.correct{border-color:var(--good);background:var(--good-bg)}
.opt.correct .k{background:var(--good);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.opt.wrong .k{background:var(--bad);color:#fff}
.opt.dim{opacity:.55}
.opt[disabled]{cursor:default}

.explain{margin-top:14px;background:#f0f3ff;border:1px solid #dfe4fb;border-radius:14px;padding:14px;
  font-size:14px;line-height:1.55;color:#3a4066;animation:pop .2s}
.explain b{color:var(--indigo)}
@keyframes pop{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.qfoot{margin-top:18px}
.next{display:block;width:100%;background:var(--indigo);color:#fff;font-weight:800;font-size:16px;
  padding:15px;border-radius:14px}
.next.ghost{background:#efe9db;color:var(--indigo)}
.next:disabled{opacity:.4}

/* ---------- results ---------- */
.res-hero{background:var(--indigo);color:#fff;border-radius:22px;padding:24px 20px;text-align:center;
  margin-top:14px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.res-hero::before{content:"";position:absolute;top:-60px;right:-40px;width:180px;height:180px;
  background:radial-gradient(circle,rgba(245,179,1,.35),transparent 70%)}
.res-hero .cap{font-size:13px;font-weight:700;opacity:.75;letter-spacing:.02em;position:relative}
.score{font-size:66px;font-weight:800;letter-spacing:-.04em;line-height:1;margin:6px 0 2px;position:relative}
.score .mx{font-size:22px;opacity:.55;font-weight:700}
.score.pass{color:var(--amber-2)}
.range{font-size:13px;opacity:.7;position:relative}
.verdict{display:inline-block;margin-top:14px;padding:8px 16px;border-radius:99px;font-weight:800;
  font-size:14px;position:relative}
.verdict.pass{background:var(--amber);color:var(--indigo)}
.verdict.fail{background:rgba(255,255,255,.15);color:#fff}

.gauge{position:relative;height:12px;background:rgba(255,255,255,.18);border-radius:99px;margin:18px 4px 6px}
.gauge i{position:absolute;top:0;left:0;height:100%;background:var(--amber);border-radius:99px}
.gauge .thr{position:absolute;top:-5px;bottom:-5px;width:2px;background:#fff;opacity:.9}
.gauge .thr span{position:absolute;top:-19px;left:50%;transform:translateX(-50%);font-size:10px;white-space:nowrap;opacity:.85}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-top:14px}
.card h3{font-size:15px;margin-bottom:12px}
.bars{display:grid;gap:11px}
.bar-row{display:grid;grid-template-columns:1fr auto;gap:4px 10px;align-items:center}
.bar-row .nm{font-size:13.5px;font-weight:600}
.bar-row .pc{font-size:13px;font-weight:800;color:var(--indigo)}
.bar-track{grid-column:1/-1;height:9px;background:#eee7d8;border-radius:99px;overflow:hidden}
.bar-track i{display:block;height:100%;border-radius:99px;background:var(--amber)}
.bar-track i.lo{background:var(--bad)}
.bar-track i.hi{background:var(--good)}

.note{font-size:12px;color:var(--muted);line-height:1.5;margin-top:12px;
  background:#f4efe3;border-radius:12px;padding:12px}
.note b{color:var(--indigo)}

.share{display:flex;gap:10px;margin-top:14px}
.share button{flex:1;padding:14px;border-radius:14px;font-weight:800;font-size:15px}
.share .primary{background:var(--amber);color:var(--indigo)}
.share .sec{background:#efe9db;color:var(--indigo)}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:var(--indigo);color:#fff;
  padding:11px 18px;border-radius:99px;font-size:13.5px;font-weight:700;z-index:50;opacity:0;
  transition:opacity .2s,transform .2s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-4px)}

.review-item{border-top:1px solid var(--line);padding:14px 0}
.review-item:first-child{border-top:none}
.review-q{font-size:14px;font-weight:700;margin-bottom:6px}
.review-a{font-size:13px;margin:2px 0}
.review-a .mk{font-weight:800}
.review-a.ok{color:var(--good)} .review-a.no{color:var(--bad)}