:root{
  --ink:#172033;--muted:rgba(23,32,51,.68);--soft:#f5f7ff;--white:#fff;--purple:#6d4cff;--pink:#ec4899;--blue:#2563eb;--teal:#10b7b0;--orange:#f97316;--green:#10b981;--red:#ef4444;--border:rgba(23,32,51,.12);--shadow:0 18px 50px rgba(23,32,51,.12);--radius:28px;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;background:radial-gradient(circle at 12% 8%,rgba(236,72,153,.20),transparent 28%),radial-gradient(circle at 88% 12%,rgba(109,76,255,.24),transparent 30%),linear-gradient(135deg,#fff7fb,#eef7ff);color:var(--ink)}
button,select,textarea{font:inherit}
button{cursor:pointer}
.quest-app{width:min(1180px,100%);margin:0 auto;padding:18px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:16px}
.brand{display:inline-flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink)!important;background:rgba(255,255,255,.82);border:1px solid var(--border);border-radius:20px;padding:10px 12px;box-shadow:0 10px 28px rgba(23,32,51,.08)}
.brand-mark{width:44px;height:44px;border-radius:16px;background:linear-gradient(135deg,var(--pink),var(--purple));color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:950;letter-spacing:-.05em}
.brand strong,.brand small{display:block}.brand small{color:var(--muted);font-weight:750}.top-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.ghost-btn{border:1px solid var(--border);background:rgba(255,255,255,.9);color:var(--ink);font-weight:900;border-radius:16px;min-height:44px;padding:10px 14px;box-shadow:0 8px 22px rgba(23,32,51,.06)}
.ghost-btn.wide{width:100%;margin-top:10px}.start-btn,.next-btn{border:0;background:linear-gradient(135deg,var(--pink),var(--purple));color:#fff;font-weight:950;border-radius:18px;min-height:54px;padding:14px 18px;box-shadow:0 14px 32px rgba(109,76,255,.28)}
.setup-card{display:grid;grid-template-columns:1fr 420px;gap:22px;align-items:stretch;background:rgba(255,255,255,.88);border:1px solid var(--border);border-radius:34px;padding:22px;box-shadow:var(--shadow)}
.setup-copy{border-radius:28px;padding:clamp(28px,5vw,58px);background:radial-gradient(circle at 10% 15%,rgba(236,72,153,.22),transparent 34%),radial-gradient(circle at 85% 80%,rgba(37,99,235,.17),transparent 30%),linear-gradient(135deg,#fff,#f5f1ff)}
.eyebrow{display:inline-flex;min-height:34px;align-items:center;padding:7px 13px;border-radius:999px;background:#fff;color:var(--purple);font-weight:950;font-size:.92rem;box-shadow:0 8px 22px rgba(23,32,51,.08);margin:0 0 16px}.setup-copy h1{font-size:clamp(2.3rem,6vw,5rem);line-height:.95;letter-spacing:-.065em;margin:0}.setup-copy p:not(.eyebrow){font-size:clamp(1.05rem,2vw,1.25rem);line-height:1.55;color:var(--muted);max-width:720px}
.controls-panel{display:grid;gap:14px;background:#fff;border:1px solid var(--border);border-radius:28px;padding:20px}label{display:grid;gap:7px;font-weight:900;color:rgba(23,32,51,.82)}select,textarea{width:100%;border:1px solid var(--border);border-radius:16px;background:#f8f9ff;color:var(--ink);padding:12px 13px;font-weight:800}textarea{resize:vertical;min-height:120px;font-weight:650;line-height:1.4}.control-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.check-row{display:flex;align-items:center;gap:10px;background:#f8f9ff;border:1px solid var(--border);border-radius:16px;padding:12px}.check-row input{width:20px;height:20px}.custom-box{border:1px solid var(--border);border-radius:18px;padding:12px;background:#fbfcff}.custom-box summary{font-weight:950;cursor:pointer}.custom-box p{margin:10px 0 6px;color:var(--muted)}pre{white-space:pre-wrap;background:#172033;color:#fff;border-radius:14px;padding:10px;overflow:auto;font-size:.82rem}
[hidden]{display:none!important}.game-screen{display:grid;gap:16px}.hud{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.hud-item{background:rgba(255,255,255,.92);border:1px solid var(--border);border-radius:20px;padding:14px;text-align:center;box-shadow:0 10px 26px rgba(23,32,51,.07)}.hud-item span{display:block;color:var(--muted);font-weight:850;font-size:.82rem}.hud-item strong{display:block;font-size:clamp(1.5rem,4vw,2.2rem);letter-spacing:-.04em}
.quest-meter{position:relative;height:34px;border-radius:999px;background:#fff;border:1px solid var(--border);overflow:hidden;box-shadow:0 10px 26px rgba(23,32,51,.07)}.meter-fill{height:100%;width:0;background:linear-gradient(90deg,var(--pink),var(--purple),var(--blue));transition:width .35s ease}.quest-meter span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-weight:950;color:#172033;text-shadow:0 1px 0 rgba(255,255,255,.65)}
.question-card{background:#fff;border:1px solid var(--border);border-radius:32px;padding:clamp(22px,4vw,46px);box-shadow:var(--shadow)}.subject-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.subject-tag,.difficulty-tag{display:inline-flex;min-height:32px;align-items:center;border-radius:999px;padding:6px 10px;font-weight:950}.subject-tag{background:rgba(236,72,153,.12);color:#a3155f}.difficulty-tag{background:rgba(109,76,255,.12);color:#5435d1}.question-card h2{margin:0;font-size:clamp(2rem,5vw,4.2rem);line-height:1;letter-spacing:-.055em}.hint-text{margin:18px 0 0;color:var(--muted);font-size:1.05rem;font-weight:780}
.answers-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.answer-btn{border:1px solid var(--border);background:#fff;color:var(--ink);border-radius:24px;padding:22px;min-height:98px;font-weight:950;font-size:clamp(1.25rem,3vw,2rem);box-shadow:0 12px 30px rgba(23,32,51,.08);transition:transform .16s ease, box-shadow .16s ease, background .16s ease}.answer-btn:hover,.answer-btn:focus{transform:translateY(-2px);box-shadow:0 18px 44px rgba(23,32,51,.13);outline:3px solid rgba(109,76,255,.18)}.answer-btn.correct{background:rgba(16,185,129,.16);border-color:rgba(16,185,129,.55)}.answer-btn.wrong{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.45)}.answer-btn:disabled{cursor:default}.feedback-row{display:flex;justify-content:space-between;align-items:center;gap:14px;background:rgba(255,255,255,.88);border:1px solid var(--border);border-radius:22px;padding:14px 16px;box-shadow:0 10px 26px rgba(23,32,51,.07)}.feedback-row p{margin:0;font-weight:900;color:var(--muted)}
.end-screen{min-height:70vh;display:grid;place-items:center}.end-card{width:min(760px,100%);background:#fff;border:1px solid var(--border);border-radius:34px;padding:clamp(24px,5vw,52px);box-shadow:var(--shadow);text-align:center}.end-card h2{font-size:clamp(2.2rem,6vw,4.8rem);letter-spacing:-.06em;line-height:.95;margin:0 0 12px}.end-card p{color:var(--muted);font-size:1.1rem}.results-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}.results-grid div{background:#f8f9ff;border:1px solid var(--border);border-radius:20px;padding:14px}.results-grid span{display:block;color:var(--muted);font-weight:850}.results-grid strong{display:block;font-size:2rem;letter-spacing:-.04em}.end-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.display-clean .topbar{display:none}.display-clean .quest-app{padding-top:10px}
@media(max-width:920px){.setup-card{grid-template-columns:1fr}.hud{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.quest-app{padding:10px}.topbar{display:grid}.top-actions{justify-content:stretch}.ghost-btn,.start-btn{width:100%}.control-grid,.answers-grid,.results-grid{grid-template-columns:1fr}.setup-card{border-radius:24px;padding:12px}.setup-copy,.controls-panel,.question-card{border-radius:22px}.answer-btn{min-height:78px}.feedback-row{display:grid}}