:root{
  --bg:#08111f;--bg2:#121d34;--ink:#f5efe1;--muted:#a7b1c5;--card:#111b2ddd;--card2:#17223add;
  --line:rgba(229,191,119,.18);--gold:#e5bf77;--gold2:#f2d9aa;--teal:#5bd6ca;--green:#37d399;--red:#f87171;--violet:#9d8cff;
  --shadow:0 24px 70px rgba(0,0,0,.34);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;min-height:100vh;color:var(--ink);background:
radial-gradient(circle at 14% 0%,rgba(91,214,202,.16),transparent 26%),radial-gradient(circle at 90% 10%,rgba(229,191,119,.16),transparent 24%),radial-gradient(circle at 45% 100%,rgba(157,140,255,.12),transparent 28%),linear-gradient(135deg,var(--bg),var(--bg2) 58%,#25172f);overflow-x:hidden}button,input,select{font:inherit}.hidden{display:none!important}a{color:inherit;text-decoration:none}.shell{width:min(1180px,calc(100% - 28px));margin:0 auto}.top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;flex-wrap:wrap}.back{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:rgba(255,255,255,.06);border-radius:999px;padding:11px 14px;font-weight:950;color:#f5dcae;box-shadow:0 12px 32px rgba(0,0,0,.18)}.back:hover{border-color:rgba(229,191,119,.42);color:#fff}.brand{display:flex;align-items:center;gap:14px}.crest{width:58px;height:58px;border-radius:20px;display:grid;place-items:center;font-size:30px;background:linear-gradient(135deg,#f6d28f,#cc824a);color:#28180b;box-shadow:0 16px 40px rgba(229,191,119,.25)}h1{margin:0;font-size:clamp(30px,5vw,54px);line-height:.92;letter-spacing:-.045em;background:linear-gradient(135deg,#fff7e8,#e5bf77,#8ff0e6);-webkit-background-clip:text;background-clip:text;color:transparent}.subtitle{margin:6px 0 0;color:var(--muted);line-height:1.55}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-bottom:18px}.card{position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.09);background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035));backdrop-filter:blur(14px);border-radius:30px;box-shadow:var(--shadow)}.intro{padding:28px}.intro:after,.statbox:after,.question-card:after{content:"";position:absolute;right:-36px;bottom:-36px;width:180px;height:180px;border-radius:50%;background:rgba(229,191,119,.08)}.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border:1px solid rgba(229,191,119,.28);border-radius:999px;background:rgba(229,191,119,.08);color:var(--gold2);font-size:12px;font-weight:1000;letter-spacing:.12em;text-transform:uppercase}.intro h2{font-size:clamp(34px,5vw,62px);line-height:.95;letter-spacing:-.055em;margin:16px 0 12px}.intro p{color:var(--muted);line-height:1.65;margin:0;max-width:760px}.mode-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.mode-btn{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.06);color:#dce7f6;border-radius:999px;padding:10px 13px;font-weight:900;font-size:13px;cursor:pointer}.mode-btn.active{background:linear-gradient(135deg,#e5bf77,#58d5ca);color:#1a160f;border-color:transparent}.controls{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:16px}.start{border:0;border-radius:20px;padding:15px 20px;font-weight:1000;cursor:pointer;background:linear-gradient(135deg,#f6d28f,#58d5ca);color:#181203;box-shadow:0 18px 38px rgba(91,214,202,.16)}.ghost{border:1px solid rgba(255,255,255,.11);border-radius:20px;padding:15px 17px;font-weight:950;cursor:pointer;background:rgba(255,255,255,.055);color:#dbe6f5}.ghost:hover{border-color:rgba(229,191,119,.32);color:#fff}.statbox{padding:22px;display:flex;flex-direction:column;gap:14px}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat{border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:14px;background:rgba(6,11,22,.22)}.stat b{display:block;font-size:28px;color:#fff3d2}.stat span{color:var(--muted);font-size:11px;font-weight:1000;text-transform:uppercase;letter-spacing:.09em}.bar{height:8px;background:rgba(255,255,255,.08);border-radius:999px;overflow:hidden}.bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--red),var(--gold),var(--green));transition:.3s}.weak-list{display:grid;gap:8px;max-height:220px;overflow:auto}.weak{display:flex;gap:10px;align-items:center;border:1px solid rgba(255,255,255,.08);border-radius:16px;background:rgba(255,255,255,.04);padding:10px;color:#dce6f6}.weak .mark{width:32px;height:32px;border-radius:12px;display:grid;place-items:center;background:rgba(229,191,119,.12);color:var(--gold2);font-weight:1000}.weak small{color:var(--muted);display:block;margin-top:2px}.question-wrap{display:grid;grid-template-columns:1fr;gap:18px;margin-bottom:18px}.question-card{padding:26px;min-height:520px}.qtop{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}.qkind{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(91,214,202,.25);background:rgba(91,214,202,.08);color:#bff5ee;border-radius:999px;padding:8px 12px;font-size:12px;font-weight:1000;letter-spacing:.1em;text-transform:uppercase}.counter{color:var(--muted);font-weight:900}.prompt{margin:26px 0 8px;text-align:center}.prompt-label{color:var(--muted);font-size:12px;font-weight:1000;letter-spacing:.15em;text-transform:uppercase}.prompt-main{font-size:clamp(30px,6vw,58px);line-height:.96;font-weight:1000;letter-spacing:-.045em;color:#fff7e7;margin-top:8px}.prompt-sub{margin:12px auto 0;max-width:820px;color:#b8c4d8;line-height:1.55}.options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:26px}.option{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.06);color:#f3f7ff;border-radius:20px;padding:16px;text-align:left;cursor:pointer;min-height:74px;font-weight:900;line-height:1.35;transition:.15s transform,.15s border-color,.15s background}.option:hover:not(:disabled){transform:translateY(-2px);border-color:rgba(229,191,119,.35);background:rgba(229,191,119,.08)}.option.correct{background:rgba(55,211,153,.14);border-color:rgba(55,211,153,.65);color:#d8fff0}.option.wrong{background:rgba(248,113,113,.14);border-color:rgba(248,113,113,.72);color:#ffe1e1}.option.dim{opacity:.55}.feedback{margin-top:18px;border:1px solid rgba(255,255,255,.09);background:rgba(7,11,22,.38);border-radius:22px;padding:16px;line-height:1.55;color:#dce7f6}.feedback h3{margin:0 0 8px;font-size:22px}.feedback.good h3{color:#8ff0cc}.feedback.bad h3{color:#ffb4b4}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.next{border:0;border-radius:17px;padding:13px 18px;font-weight:1000;cursor:pointer;background:linear-gradient(135deg,#e5bf77,#58d5ca);color:#151105}.reference{padding:22px;margin-bottom:26px}.reference h2{margin:0 0 8px;font-size:28px}.search{width:100%;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.06);color:#fff;border-radius:18px;padding:14px;margin:12px 0 14px;outline:none}.search:focus{border-color:rgba(91,214,202,.55);box-shadow:0 0 0 4px rgba(91,214,202,.10)}.front-list{display:grid;gap:10px;max-height:520px;overflow:auto}.front-row{border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.04);border-radius:18px;padding:14px}.front-row b{color:#fff3d2}.front-row p{margin:6px 0 0;color:#aebbd1;line-height:1.45;font-size:13px}.toggle{display:flex;align-items:center;gap:10px;margin-top:12px;color:#dbe6f4;font-weight:900}.toggle input{width:18px;height:18px;accent-color:#e5bf77}.shake{animation:shake .35s linear}@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}55%{transform:translateX(8px)}80%{transform:translateX(-4px)}}@media(max-width:960px){.hero{grid-template-columns:1fr}.options{grid-template-columns:1fr}.controls{grid-template-columns:1fr}.question-card{min-height:auto}.stats{grid-template-columns:repeat(4,1fr)}}@media(max-width:640px){.shell{width:min(100% - 20px,1180px)}.top{align-items:flex-start}.brand{align-items:flex-start}.crest{width:50px;height:50px}.intro,.statbox,.question-card,.reference{padding:20px;border-radius:24px}.stats{grid-template-columns:repeat(2,1fr)}.prompt-main{font-size:34px}.option{min-height:unset}.mode-btn{width:100%;text-align:center}.actions .ghost,.actions .next{width:100%}}

/* v5.2: decorative circles must not block buttons or search */
.intro:after,.statbox:after,.question-card:after{pointer-events:none!important;z-index:0!important}
.intro > *, .statbox > *, .question-card > *{position:relative;z-index:1}
.front-row.empty{border-style:dashed;color:#d6e1f3}
.actions button{position:relative;z-index:5}