:root{
--bg:#f7f7fb;--card:#fff;--text:#171321;--muted:#6f6a78;--primary:#7c3aed;--primary2:#ec4899;
--border:#e9e5ef;--shadow:0 18px 50px rgba(38,20,70,.10);--success:#16a34a;--danger:#dc2626;
font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 0%,#f0e8ff,transparent 32%),var(--bg);color:var(--text);min-height:100vh}
body.dark{--bg:#11101a;--card:#1b1925;--text:#f7f4fb;--muted:#aaa4b4;--border:#302b3c;--shadow:0 18px 50px rgba(0,0,0,.3)}
button,input,select{font:inherit}button{cursor:pointer;border:0}.topbar{height:76px;display:flex;justify-content:space-between;align-items:center;padding:0 clamp(18px,5vw,70px);position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.brand{background:none;color:var(--text);display:flex;gap:10px;text-align:left;align-items:center}.brand b{display:block;letter-spacing:.08em;font-size:14px}.brand small{display:block;color:var(--muted);font-size:10px;margin-top:2px}.logo{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:900}
.top-actions{display:flex;gap:8px}.icon-btn,.secondary{background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:13px;padding:10px 14px;box-shadow:0 5px 15px rgba(0,0,0,.04)}
.icon-btn{width:42px;height:42px;padding:0}.screen{display:none;max-width:1120px;margin:auto;padding:52px 22px 80px;min-height:calc(100vh - 130px)}.screen.active{display:block}
.hero{text-align:center;padding:65px 10px 45px}.badge,.eyebrow{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--primary)}.badge{display:inline-block;padding:8px 12px;background:#ede9fe;border-radius:999px}.hero h1{font-size:clamp(44px,7vw,82px);line-height:.98;margin:20px 0 18px;letter-spacing:-.055em}.hero h1 span{background:linear-gradient(90deg,var(--primary),var(--primary2));-webkit-background-clip:text;color:transparent}.hero p{max-width:620px;margin:auto;color:var(--muted);font-size:18px;line-height:1.6}.hero-actions{display:flex;justify-content:center;gap:12px;margin:28px 0 42px;flex-wrap:wrap}.primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;padding:13px 20px;border-radius:13px;font-weight:800;box-shadow:0 12px 25px rgba(124,58,237,.22)}.xl{padding:17px 27px;font-size:16px}.full{width:100%}.feature-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.feature-row div{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:14px 20px;min-width:120px}.feature-row b,.feature-row small{display:block}.feature-row b{font-size:18px}.feature-row small{color:var(--muted);margin-top:2px}.home-card,.setup-card,.game-card,.achievement-box,.settings-list{background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:24px;padding:26px}.home-card{display:flex;justify-content:space-between;align-items:center;gap:20px}.home-card h3{margin:7px 0}.home-card p{color:var(--muted);margin:0}.section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.section-head h2{font-size:38px;margin:5px 0;letter-spacing:-.04em}.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.mode-card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:22px;text-align:left;min-height:175px;transition:.2s}.mode-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.mode-icon{font-size:30px}.mode-card h3{margin:15px 0 7px}.mode-card p{color:var(--muted);font-size:14px;line-height:1.5}.setup-card{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:25px}.player-setup label,.game-options label{font-weight:800;font-size:11px;letter-spacing:.08em}.player-setup input,.game-options select{display:block;width:100%;margin-top:9px;padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--bg);color:var(--text);outline:none}.player-setup input:focus{border-color:var(--primary)}.avatar-picker{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.avatar{width:40px;height:40px;border-radius:12px;background:var(--bg);border:2px solid transparent;font-size:20px}.avatar.selected{border-color:var(--primary);background:#ede9fe}.vs{font-weight:900;color:var(--primary);font-size:20px}.game-options{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:18px 0}.game-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.progress{height:6px;background:var(--border);border-radius:99px;width:260px;margin-top:8px;overflow:hidden}.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:.4s}.scoreboard{font-weight:900;font-size:25px;display:flex;gap:9px}.scoreboard small{color:var(--muted)}.game-card{text-align:center;max-width:850px;margin:auto}.game-card h2{font-size:clamp(25px,4vw,42px);letter-spacing:-.03em;margin:12px auto 25px;max-width:720px}.question-tag{display:inline-block;background:#f3e8ff;color:var(--primary);padding:7px 10px;border-radius:999px;font-size:10px;font-weight:900;letter-spacing:.1em}.answer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:650px;margin:auto}.answer{padding:16px;border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:14px;font-weight:700;transition:.15s}.answer:hover{border-color:var(--primary);transform:translateY(-2px)}.answer.correct{background:#dcfce7;border-color:#86efac}.answer.wrong{background:#fee2e2;border-color:#fca5a5}.private-note{color:var(--muted);font-size:13px;margin:0 auto 18px}.timer{font-size:14px;font-weight:900;color:var(--primary);margin:12px}.reveal{font-size:48px;margin:10px}.result-actions{display:flex;justify-content:center;gap:10px;margin:25px 0;flex-wrap:wrap}.results-hero{text-align:center}.trophy{font-size:72px}.results-hero h2{font-size:48px;margin:8px}.results-hero p{color:var(--muted)}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:28px 0}.stat{background:var(--card);border:1px solid var(--border);padding:20px;border-radius:18px;text-align:center}.stat b{display:block;font-size:25px}.stat small{color:var(--muted)}.achievement-box{max-width:800px;margin:30px auto}.achievements{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px}.achievement{padding:12px;border-radius:12px;background:var(--bg);display:flex;gap:10px;align-items:center}.achievement.locked{opacity:.4}.settings-list{display:grid;gap:15px;max-width:650px}.settings-list label{display:flex;justify-content:space-between;align-items:center;padding:14px;border-bottom:1px solid var(--border)}.danger{background:#fee2e2;color:var(--danger);padding:13px;border-radius:12px;font-weight:800}.toast{position:fixed;left:50%;bottom:25px;transform:translateX(-50%);background:#171321;color:white;padding:12px 18px;border-radius:999px;z-index:20;box-shadow:var(--shadow)}footer{padding:20px 22px;display:flex;justify-content:space-between;color:var(--muted);font-size:11px;border-top:1px solid var(--border);max-width:1120px;margin:auto}
@media(max-width:760px){.mode-grid{grid-template-columns:1fr 1fr}.setup-card{grid-template-columns:1fr}.vs{text-align:center}.game-options{grid-template-columns:1fr}.answer-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.home-card{flex-direction:column;align-items:flex-start}.hero{padding-top:35px}.progress{width:180px}footer{flex-direction:column;gap:8px}.achievements{grid-template-columns:1fr}}
@media(max-width:470px){.mode-grid{grid-template-columns:1fr}.hero h1{font-size:45px}.screen{padding-left:14px;padding-right:14px}.setup-card,.game-card{padding:18px}}