:root{--bg: #080b10;--surface: #111820;--surface-raised: #17212b;--border: #2a3444;--text: #eef3f7;--text-muted: #8793a3;--accent: #57e6e6;--accent-dim: #38bfc5;--acid: #c7ff5e;--warm: #ff9f78;--danger: #f87171;--font-sans: "Manrope", system-ui, sans-serif;--font-mono: "DM Mono", monospace}*,*:before,*:after{box-sizing:border-box}.chess-main{width:min(100%,84rem);max-width:60rem;padding-top:clamp(.75rem,1.5vw,1.35rem)}.chess-shell{min-height:38rem;padding:clamp(1rem,2.5vw,1.5rem);background:linear-gradient(145deg,rgba(255,159,120,.04),transparent 22%),linear-gradient(155deg,#121820fa,#080c11f5)}.chess-intro{display:flex;margin-bottom:.75rem;align-items:end;justify-content:space-between;gap:1rem}.chess-intro>div{flex:1;min-width:0}.chess-gate-code,.chess-dialog-code,.chess-history header span,.chess-version{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.13em;text-transform:uppercase}.chess-intro 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.chess-opponent-options{grid-template-columns:repeat(2,minmax(0,1fr))}.chess-gate-orbit{width:3.8rem;aspect-ratio:1;border:2px dashed var(--accent);border-radius:50%;box-shadow:inset 0 0 0 .75rem #57e6e614;animation:chess-orbit 2.4s linear infinite}@keyframes chess-orbit{to{transform:rotate(360deg)}}.chess-workspace{display:grid;align-items:start;grid-template-columns:minmax(20rem,1fr) minmax(15rem,21rem);column-gap:clamp(1.25rem,3vw,2.5rem);row-gap:.6rem}.chess-board-column{min-width:0}.chess-board-toolbar{display:grid;width:100%;min-height:3.25rem;grid-template-columns:minmax(0,1fr) auto;align-items:stretch;grid-column:1 / -1;gap:0;overflow:hidden;border:1px solid rgba(255,255,255,.12);border-radius:.42rem;background:linear-gradient(90deg,rgba(87,230,230,.045),transparent 48%),#05090db8;box-shadow:inset 0 0 0 1px #0000004d}.chess-board-meta{display:flex;min-width:0;min-height:3.25rem;padding:.6rem .85rem;align-items:center;gap:.65rem;box-shadow:inset 2px 0 0 var(--accent)}.chess-board-meta strong{flex:0 0 auto;font:600 .84rem/1.2 var(--font-sans);white-space:nowrap}.chess-board-meta small{min-width:0;overflow:hidden;color:var(--text-muted);font-size:.7rem;text-overflow:ellipsis;white-space:nowrap}.chess-turn-dot{width:.62rem;flex:0 0 auto;aspect-ratio:1;border:2px solid var(--text);border-radius:50%}.chess-turn-dot-black{border-color:#7d8d99;background:#10161d}.chess-turn-dot-white{background:var(--text)}.chess-version{margin-left:auto;flex:0 0 auto;color:var(--text-muted);white-space:nowrap}.chess-board-frame{position:relative;width:min(100%,35.5rem);padding:clamp(.55rem,1.3vw,.8rem);overflow:hidden;border:1px solid rgba(87,230,230,.24);border-radius:11px;background:#1c2a2e;box-shadow:inset 0 1px #c1dddb2b,0 .75rem 1.5rem #0000003d;transition:opacity .2s}.chess-board-plot{display:grid;width:100%;grid-template-columns:.85rem minmax(0,1fr);grid-template-rows:minmax(0,1fr) .8rem;grid-template-areas:"ranks board" ". 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var(--border)}.chess-history header span{color:var(--text-muted)}.chess-history h2{margin:0;font-size:.95rem}.chess-move-list{margin:0;padding:.75rem 1.25rem 1.25rem;overflow:auto;list-style:none;counter-reset:none}.chess-history-record{display:grid;min-height:0;overflow:hidden;grid-template-rows:auto minmax(0,1fr)}.chess-history-players{display:grid;padding:.55rem 1.25rem 0;grid-template-columns:2.8rem 1fr 1fr;column-gap:.6rem;color:var(--text-muted);font:.62rem var(--font-mono);letter-spacing:.08em;text-transform:uppercase}.chess-history-players span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chess-move-list li{display:grid;min-height:2.45rem;align-items:center;grid-template-columns:2.8rem 1fr 1fr;border-bottom:1px solid rgba(42,52,68,.58);column-gap:.6rem}.chess-move-list li>span{color:var(--text-muted);font:.75rem var(--font-mono)}.chess-move-list strong{overflow:hidden;font:500 .9rem var(--font-mono);text-overflow:ellipsis;white-space:nowrap}.chess-history-empty{display:grid;padding:2rem 1.25rem;place-items:center;align-content:center;color:var(--text-muted);text-align:center}.chess-history-empty span{color:#57e6e633;font:4rem/1 var(--font-mono)}.chess-history-empty p{max-width:15rem}.chess-public-panel{min-height:20rem}.chess-public-copy{display:grid;padding:clamp(1.25rem,3vw,2rem);align-content:center;gap:1rem}.chess-public-copy p{margin:0;color:var(--text-muted)}.chess-public-copy .chess-public-unavailable{padding:.75rem;border-left:2px solid var(--warm);background:#ff9f7814;color:#ffc0a7;font-family:var(--font-mono);font-size:.68rem}.chess-inline-action{padding:0;border:0;background:transparent;color:var(--accent);font:inherit;text-decoration:underline;text-underline-offset:.18em;cursor:pointer}.chess-inline-action:focus-visible{outline:2px solid var(--acid);outline-offset:3px}.chess-error{position:fixed;right:1rem;bottom:1rem;z-index:100;display:flex;width:min(calc(100% - 2rem),32rem);align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 1rem;border:1px solid rgba(248,113,113,.55);border-radius:9px;background:#281014f5;color:#fecaca;box-shadow:0 1rem 3rem #0006}.chess-error button{border:0;background:transparent;color:inherit;font-size:1.5rem;cursor:pointer}.chess-error-actions{display:flex;align-items:center;gap:.5rem}.chess-error .chess-error-retry{padding:.35rem .55rem;border:1px solid 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var(--font-mono);letter-spacing:.03em}.chess-dialog>.chess-engine-notice{margin:.25rem 0 1.2rem;padding:0;border-top:0}.chess-engine-notice strong{color:var(--text);font-weight:700}.chess-engine-notice-links{display:flex;flex-wrap:wrap;gap:.3rem .65rem}.chess-engine-notice a{color:var(--accent);text-decoration:underline;text-underline-offset:.2em}.chess-engine-notice a:hover{color:var(--acid)}.chess-engine-notice a:focus-visible{outline:2px solid var(--acid);outline-offset:3px}.chess-promotion-options{display:grid;margin:1.25rem 0;grid-template-columns:repeat(4,1fr);gap:.55rem}.chess-promotion-options button{display:grid;min-width:0;padding:.65rem .25rem;place-items:center;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer}.chess-promotion-options button:hover{border-color:var(--accent)}.chess-promotion-options button span{font-size:2.5rem;line-height:1}.chess-promotion-black button span{color:#99a7b1}.chess-promotion-options small{margin-top:.35rem;color:var(--text-muted)}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:880px){.chess-workspace{grid-template-columns:1fr}.chess-board-frame{margin-inline:auto}.chess-history{max-height:19rem}}@media(max-width:760px){.chess-board-toolbar{grid-template-columns:1fr}.chess-board-actions{display:grid;grid-template-columns:repeat(auto-fit,minmax(6.5rem,1fr));border-top:1px solid rgba(255,255,255,.1);border-left:0}.chess-toolbar-quota{min-height:2.4rem;grid-column:1 / -1;justify-content:flex-end;border-right:0;border-bottom:1px solid rgba(255,255,255,.1)}.chess-difficulty-options{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:620px){.chess-main{padding-inline:.75rem}.chess-intro{align-items:start;flex-direction:column}.chess-shell{padding:1rem .75rem}.chess-board-frame{padding:.38rem}.chess-board-plot{grid-template-columns:.7rem 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