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#07090f;--bg-elev: #121624;--line: rgba(255, 176, 96, .16);--text: #fff4ea;--muted: #b5a394;--accent: #ff9a4a;--accent-2: #ffc46b;--danger: #ff6b85;--board-light: #f0d9b5;--board-dark: #f0d9b5;--shadow: 0 24px 60px rgba(0, 0, 0, .35);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;min-height:100%;background:radial-gradient(1200px 500px at 10% -10%,rgba(255,154,74,.16),transparent 50%),radial-gradient(900px 500px at 100% 0%,rgba(255,196,107,.12),transparent 45%),var(--bg);color:var(--text)}body{display:flex;justify-content:center;padding:24px 16px 48px}#app{width:min(920px,100%)}#screen-loading,#screen-setup{width:min(560px,100%);margin:0 auto}.masthead{text-align:center;margin-bottom:28px}.brand{display:flex;align-items:center;justify-content:center;gap:12px;width:fit-content;margin-inline:auto;text-decoration:none;color:inherit}.brand:hover .wordmark,.brand:focus-visible .wordmark{color:var(--accent-2)}.brand:focus-visible{outline:2px solid var(--accent);outline-offset:6px;border-radius:8px}.brand-logo{width:2.6rem;height:2.6rem;flex-shrink:0;object-fit:contain}.wordmark{font-size:2.4rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}.tagline{margin:8px 0 0;color:var(--muted);letter-spacing:.04em}.panel,.play-layout,dialog{background:#121624eb;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.panel{padding:28px 24px}.panel h1{margin:0 0 20px;font-size:1.35rem}fieldset{border:1px solid var(--line);border-radius:14px;margin:0 0 16px;padding:12px 14px 16px}legend{padding:0 6px;color:var(--muted);font-size:.85rem}.choices{display:flex;flex-wrap:wrap;gap:8px}.choice{display:flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;cursor:pointer;-webkit-user-select:none;user-select:none}.choice:has(input:checked){border-color:var(--accent);color:var(--accent);background:#ff9a4a14}.choice input{accent-color:var(--accent)}.custom-time{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.custom-time label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:.85rem}input[type=number]{background:#0c101c;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:8px 10px;font:inherit}button{font:inherit;border:1px solid var(--line);background:#0c101c;color:var(--text);border-radius:12px;padding:12px 16px;cursor:pointer}button.primary{width:100%;border-color:transparent;background:linear-gradient(120deg,#ff8a3d,#ffc46b);color:#1a1008;font-weight:700}button.danger{width:100%;border-color:#ff6b8566;color:var(--danger)}button.link{background:none;border:none;color:var(--muted)}.play-layout{padding:16px;display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,260px);gap:16px;align-items:stretch}.board-column{display:grid;gap:12px;min-width:0}.side-panel{display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;gap:10px;min-height:0}.move-list-wrap{display:flex;flex-direction:column;min-height:120px;border:1px solid var(--line);border-radius:12px;background:#0c101c;overflow:hidden}.move-list-wrap h2{margin:0;padding:10px 12px 8px;font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.move-list{margin:0;padding:6px 0 10px;list-style:none;overflow-y:auto;flex:1;min-height:0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92rem}.move-list li{display:grid;grid-template-columns:2.4em 1fr 1fr;gap:4px;padding:3px 12px}.move-num{color:var(--muted)}.san.current{color:var(--accent);font-weight:700}.pgn-view{margin:14px 0 0;padding:12px;max-height:240px;overflow:auto;background:#0c101c;border:1px solid var(--line);border-radius:12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.82rem;white-space:pre-wrap;word-break:break-word;color:var(--text)}.clock{display:flex;justify-content:space-between;align-items:baseline;padding:10px 14px;border-radius:12px;background:#0c101c;border:1px solid var(--line);font-variant-numeric:tabular-nums}.clock.active{border-color:var(--accent);box-shadow:inset 0 0 0 1px #ff9a4a40}.clock.low .clock-time{color:var(--danger)}.clock-label{color:var(--muted);font-size:.9rem}.clock-time{font-size:1.45rem;font-weight:650;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.engine-status{text-align:center;color:var(--muted);min-height:1.4em;font-size:.95rem}.board-wrap{position:relative;width:100%;aspect-ratio:1;border-radius:10px}.board-wrap.result-win{box-shadow:0 0 0 3px #3ecf8e}.board-wrap.result-loss{box-shadow:0 0 0 3px #ff6b85}.board-wrap.result-draw{box-shadow:0 0 0 3px #8b95a8}.move-list-header{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-right:8px;border-bottom:1px solid var(--line)}.move-list-header h2{border-bottom:none;padding-right:0}.move-list-header .link{padding:8px 10px;font-size:.8rem}#board,.cg-wrap{width:100%;height:100%}cg-board{background-color:var(--board-dark)}.promo-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:#07090f8c;z-index:5}.promo-choices{display:grid;grid-template-columns:repeat(4,64px);gap:8px}.promo-choices button{width:64px;height:64px;padding:0;background-color:var(--board-light);position:relative}.promo-choices piece{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.spinner{width:36px;height:36px;margin:8px auto 16px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}#screen-loading{text-align:center;color:var(--muted)}#screen-loading.error{color:var(--danger)}dialog{border:1px solid var(--line);color:var(--text);padding:24px;width:min(520px,calc(100% - 32px))}dialog::backdrop{background:#04060cb8}dialog h2{margin:0 0 8px}.dialog-actions{display:grid;gap:8px;margin-top:18px}.cg-wrap coords{font-family:inherit;color:#ffffffb8}@media(max-width:760px){.play-layout{grid-template-columns:1fr}.side-panel{min-height:280px}.move-list-wrap{max-height:220px}}@media(max-width:520px){.wordmark{font-size:1.8rem;letter-spacing:.12em}.brand-logo{width:2rem;height:2rem}.promo-choices{grid-template-columns:repeat(4,52px)}.promo-choices button{width:52px;height:52px}}