*{box-sizing:border-box}:root{color-scheme:dark;--bg: #080808;--panel: #151515;--panel-soft: #1f1f1f;--gold: #d6b24a;--gold-2: #f3d878;--text: #f8f4e8;--muted: #b8b2a3;--danger: #ff5f5f;--green: #4bd083;--blue: #5fa8ff;--line: rgba(214, 178, 74, .35)}html,body,#root{width:100%;min-height:100%;margin:0;background:radial-gradient(circle at center,#181818 0%,var(--bg) 55%);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;overflow:hidden}button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}.screen{min-height:100svh;width:100vw;padding:max(18px,env(safe-area-inset-top)) clamp(14px,3vw,42px) max(18px,env(safe-area-inset-bottom))}.start-screen,.result-screen{display:grid;place-items:center}.hero-card,.result-card{width:min(980px,96vw);padding:clamp(24px,5vw,64px);border:1px solid var(--line);border-radius:34px;background:linear-gradient(145deg,#ffffff0f,#ffffff03),#121212eb;box-shadow:0 28px 80px #00000073;text-align:center}.hero-logo{width:clamp(54px,9vw,92px);height:clamp(54px,9vw,92px);object-fit:contain;margin-bottom:clamp(14px,2vw,22px)}.eyebrow{margin:0 0 10px;color:var(--gold-2);letter-spacing:.18em;text-transform:uppercase;font-size:clamp(.72rem,1.3vw,.95rem)}h1{margin:0;font-size:clamp(2.6rem,8vw,6.6rem);line-height:.94;color:var(--gold);letter-spacing:-.07em}.hero-text{width:min(720px,100%);margin:clamp(18px,3vw,32px) auto;color:var(--muted);font-size:clamp(1rem,2.1vw,1.35rem);line-height:1.45}.input-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;width:min(860px,100%);margin:0 auto}input{width:100%;padding:18px 20px;border-radius:20px;border:1px solid var(--line);background:#0f0f0f;color:var(--text);outline:none;min-width:0}input:focus{border-color:var(--gold);box-shadow:0 0 0 4px #d6b24a1f}button,.primary-wide,.ghost-button{border:0;border-radius:18px;padding:16px 22px;color:#111;background:linear-gradient(180deg,var(--gold-2),var(--gold));font-weight:800;cursor:pointer;transition:transform .15s ease,opacity .15s ease,filter .15s ease}button:hover,.primary-wide:hover{transform:translateY(-1px);filter:brightness(1.04)}button:disabled{opacity:.45;cursor:not-allowed;transform:none}.ghost-button{background:#ffffff0f;color:var(--text);border:1px solid var(--line);text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.primary-wide{width:100%;margin-top:20px}.error-box{margin:16px auto 0;width:min(760px,100%);padding:14px 16px;color:#ffecec;background:#ff5f5f1f;border:1px solid rgba(255,95,95,.35);border-radius:16px}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:28px auto 0;width:min(760px,100%)}.feature-grid span{padding:12px 10px;border:1px solid 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var(--line);border-radius:30px;background:#141414f0;padding:clamp(20px,3vw,30px);display:flex;flex-direction:column;justify-content:center}.quiz-status-card img{width:64px;height:64px;object-fit:contain;margin-bottom:20px}.quiz-status-card h2{margin:0 0 12px;color:var(--gold);font-size:clamp(1.5rem,3vw,2.3rem)}.quiz-status-card p{color:var(--muted);line-height:1.45}.status-pill-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.pill{padding:9px 12px;border-radius:999px;border:1px solid var(--line);color:var(--muted);background:#ffffff0a;font-weight:800}.pill.active{color:#111;background:var(--gold)}.small-note{font-size:.88rem}.duel-screen{height:100svh;width:100vw;display:grid;grid-template-rows:1fr clamp(54px,9vh,82px) 1fr;background:radial-gradient(circle at center,rgba(214,178,74,.08),transparent 30%),#080808;overflow:hidden}.player-panel{min-height:0;padding:clamp(8px,1.6vw,22px)}.player-panel.flipped{transform:rotate(180deg)}.panel-inner{height:100%;border:1px solid var(--line);border-radius:clamp(18px,3vw,32px);background:#121212f5;padding:clamp(12px,2vw,24px);display:grid;grid-template-rows:auto auto 1fr auto auto;gap:clamp(8px,1.4vh,16px);overflow:hidden}.question-header,.player-footer{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-weight:800;font-size:clamp(.75rem,1.6vw,1rem)}.question-text{color:var(--text);font-size:clamp(1.1rem,3.2vw,2.3rem);line-height:1.06;letter-spacing:-.04em;margin:0}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(8px,1.4vw,14px);min-height:0}.answer-button{min-height:0;display:flex;align-items:center;gap:clamp(8px,1.5vw,14px);justify-content:flex-start;text-align:left;padding:clamp(10px,2vw,18px);border-radius:clamp(14px,2.5vw,22px);border:1px solid rgba(255,255,255,.08);background:linear-gradient(145deg,#232323,#151515);color:var(--text);font-weight:850;font-size:clamp(.9rem,2.2vw,1.35rem);line-height:1.08}.answer-button.chosen{border-color:var(--blue);background:#5fa8ff33}.answer-button.correct{color:#04130a;background:var(--green)}.answer-button.wrong{color:#210000;background:var(--danger)}.answer-letter{display:inline-grid;place-items:center;flex:0 0 auto;width:clamp(26px,4vw,40px);height:clamp(26px,4vw,40px);border-radius:50%;background:#ffffff21;color:var(--gold-2)}.center-band{display:grid;grid-template-columns:1fr auto auto auto 1fr;align-items:center;justify-items:center;gap:clamp(10px,2vw,20px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#050505d1;position:relative}.timer-track{position:absolute;bottom:0;left:0;width:100%;height:6px;background:#ffffff0d;overflow:hidden}.timer-bar{height:100%;width:100%;transform-origin:left}.center-band img{width:clamp(36px,7vh,58px);height:clamp(36px,7vh,58px);object-fit:contain}.score-pill,.timer-or-state{min-width:clamp(58px,11vw,110px);padding:10px 14px;text-align:center;border:1px solid var(--line);border-radius:999px;color:var(--gold-2);font-weight:950;font-size:clamp(1rem,3vw,1.6rem);background:#ffffff0a}.explanation{margin:0;color:var(--muted);font-size:clamp(.72rem,1.4vw,.95rem);line-height:1.25}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:34px auto;width:min(560px,100%)}.result-grid div{border:1px solid var(--line);border-radius:24px;padding:22px;background:#ffffff0a}.result-grid span{color:var(--muted);display:block;margin-bottom:8px;font-weight:800}.result-grid strong{color:var(--gold);font-size:clamp(2rem,7vw,4rem)}@media(max-width:840px){.input-row,.video-layout,.top-bar{grid-template-columns:1fr}.brand-mini{order:-1}.player-frame{min-height:48svh}.feature-grid{grid-template-columns:1fr 1fr}.duel-screen{grid-template-rows:1fr 58px 1fr}}@media(max-width:520px){.screen{padding-inline:10px}.hero-card,.result-card{border-radius:24px;padding:20px}.answer-grid{grid-template-columns:1fr}.panel-inner{gap:6px}.question-header,.player-footer{font-size:.68rem}.question-text{font-size:1rem}.answer-button{font-size:.82rem;padding:8px}.explanation{display:none}}