:root{--bg:#0f1419;--bg-2:#161c24;--card:#1c242e;--card-2:#242e3a;--border:#2b3542;--text:#e7ecf2;--muted:#93a1b3;--accent:#f2b544;--accent-2:#d99a1f;--you:#66d19e;--history:#5fb4ff;--stockfish:#f2b544;--random:#c28bff;--steer:#4fd1c5;--danger:#ff6b6b;--sq-last:#f2b54473;--sq-selected:#5fb4ff8c;--sq-target:#00000059;--sq-capture:#d64534bf;--radius:10px}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--text);margin:0;font:15px/1.5 system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif}a{color:var(--history)}h1,h2{line-height:1.15}.shell{display:flex;flex-direction:column;min-height:100vh}.topbar{display:flex;border-bottom:1px solid var(--border);background:var(--bg-2);flex-wrap:wrap;align-items:baseline;gap:16px;padding:14px 24px}.brand{text-decoration:none;display:inline-flex;align-items:baseline;gap:6px;font-size:20px;font-weight:800}.brand-you{color:var(--text)}.brand-v{color:var(--accent);font-style:italic}.brand-chess{color:var(--muted);font-weight:500}.topbar-tagline{color:var(--muted);font-size:13px}.content{flex:1;width:min(1200px,100% - 32px);margin:0 auto;padding:24px 0 48px}.muted{color:var(--muted)}.small{font-size:13px}.error{color:var(--danger)}.link{text-decoration:none;display:inline-flex;align-items: center;gap:4px}.hero{max-width:720px;margin:8vh auto 0}.hero h1{margin:0 0 16px;font-size:clamp(34px,6vw,58px)}.hero h1 em{color:var(--accent)}.lede{color:var(--muted);font-size:17px}.username-form{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 12px}.how{list-style:none;display:grid;gap:10px;margin:28px 0 0;padding:0}.how li{display:flex;color:var(--muted);align-items: center;gap:12px}.input{background:var(--card);color:var(--text);border:1px solid var(--border);font:inherit;border-radius:8px;min-width:0;padding:10px 12px}.input:focus{outline:2px solid var(--history);outline-offset:1px}.input-lg{flex:1;min-width:240px;padding:14px 16px;font-size:18px}select.input{appearance:auto}.btn{display:inline-flex;background:var(--card-2);color:var(--text);border:1px solid var(--border);font:inherit;cursor:pointer;text-decoration:none;border-radius:8px;align-items: center;gap:8px;padding:9px 14px;font-weight:600}.btn:hover:not(:disabled){border-color:var(--muted)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#1a1200;border-color:var(--accent-2)}.btn-primary:hover:not(:disabled){background:#ffc35a}.btn-lg{padding:13px 20px;font-size:17px}.btn-ghost{background:0 0}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.card-title{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:10px;font-size:12px}.warn{display:flex;border-color:var(--accent-2);align-items: flex-start;gap:12px;margin:16px 0}.warn svg{color:var(--accent);flex:none;margin-top:2px}.badge{display:inline-flex;letter-spacing:.02em;white-space:nowrap;border:1px solid #0000;border-radius:999px;align-items: center;gap:6px;padding:3px 10px 3px 8px;font-size:12px;font-weight:700}.badge-lg{padding:6px 14px 6px 10px;font-size:14px}.badge-you{color:var(--you);background:#66d19e1f;border-color:#66d19e59}.badge-history{color:var(--history);background:#5fb4ff1f;border-color:#5fb4ff66}.badge-stockfish{color:var(--stockfish);background:#f2b5441f;border-color:#f2b54466}.badge-steer{color:var(--steer);background:#4fd1c51f;border-color:#4fd1c566}.badge-random{color:var(--random);background:#c28bff1f;border-color:#c28bff66}.provenance{display:flex;flex-direction:column;align-items: flex-start;gap:6px}.provenance-sub{color:var(--muted);font-size:13px}.player-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items: flex-end;gap:16px;margin-bottom:16px}.player-head h1{margin:0}.ratings,.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1px solid var(--border);background:var(--card-2);color:var(--text);font:inherit;cursor:pointer;border-radius:999px;padding:4px 12px;font-size:13px}.chip-on{border-color:var(--history);background:#5fb4ff26}.chip-static{cursor:default}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin:16px 0}.stat dt{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-size:12px}.stat dd{margin:4px 0;font-size:28px;font-weight:800}.stat dd.small{font-size:15px;font-weight:600}.stat dd.chips{font-size:13px;font-weight:500}.stat small{color:var(--muted);display:block}.stat .btn{margin-top:8px}.newgame{display:grid;gap:14px;margin-top:8px}.newgame h2{margin:0 0 4px}.field{display:grid;gap:6px}.field label{color:var(--muted);font-size:13px;font-weight:600}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.sessions{list-style:none;display:grid;gap:6px;margin:0;padding:0}.session-row{display:grid;grid-template-columns:110px 70px 1fr auto auto;background:var(--card-2);border-radius:8px;align-items: center;gap:10px;padding:6px 8px;font-size:14px}.session-row 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svg{color:var(--history)}.import-done{border-color:#66d19e80}.import-failed{border-color:var(--danger)}.progress{background:var(--card-2);overflow:hidden;border-radius:999px;height:8px}.progress-fill{background:var(--history);height:100%;transition:width .3s}.stats-inline{display:flex;flex-wrap:wrap;gap:20px;margin:0}.stats-inline dt{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-size:11px}.stats-inline dd{margin:0;font-weight:700}.error-list{color:var(--muted);overflow:auto;max-height:160px;font-size:12px}.game{display:grid;grid-template-columns:minmax(300px,640px)minmax(300px,420px);justify-content:center;align-items: start;gap:24px}.board-column{display:grid;gap:10px}.board-wrap{position:relative}.replay{display:flex;flex-wrap:wrap;align-items: center;gap:6px}.replay-label{margin-left:6px;font-size:14px}.btn-icon{padding:7px 9px}.panel{display:grid;gap:12px}.vs{display:flex;flex-wrap:wrap;align-items: center;gap:10px}.status{display:flex;align-items: 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var(--border);margin-top:12px;padding-top:12px}.controls{display:flex;flex-wrap:wrap;gap:8px}.promo{position:absolute;display:flex;z-index:5;background:#0a0e14c7;border-radius:6px;justify-content:center;align-items: center;gap:10px;inset:0}.promo button.piece{background:var(--card);border:1px solid var(--border);color:var(--text);cursor:pointer;border-radius:10px;width:72px;height:72px;font-size:40px}.promo button.piece:hover{border-color:var(--accent)}@media (max-width:900px){.game,.field-row{grid-template-columns:1fr}.content{width:min(1200px,100% - 24px)}}