: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}.chess-intro{display:grid;align-items:end;margin-bottom:clamp(.8rem,1.6vw,1.35rem);grid-template-columns:minmax(13rem,.72fr) minmax(18rem,1fr);gap:clamp(1rem,3vw,3rem)}.chess-intro-labels{display:flex;margin-bottom:.4rem;align-items:center;flex-wrap:wrap;gap:.45rem .75rem}.chess-kicker,.chess-phase,.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-kicker{margin:0;color:var(--accent)}.chess-intro h1{margin:0;font-size:clamp(2.3rem,4.4vw,3.35rem);font-weight:650;letter-spacing:-.065em;line-height:.9}.chess-intro-description{max-width:42rem;margin:0;color:var(--text-muted);font-size:.9rem;line-height:1.5}.chess-phase{padding:.35rem .55rem;border:1px solid rgba(87,230,230,.28);border-radius:99px;color:var(--accent);white-space:nowrap}.chess-gate{display:grid;min-height:27rem;padding:clamp(2rem,6vw,5rem);justify-items:center;align-content:center;border:1px solid var(--border);border-radius:14px;background:radial-gradient(circle at 50% 15%,rgba(87,230,230,.11),transparent 38%),#111820cc;text-align:center}.chess-gate h2,.chess-gate p{width:100%}.chess-gate h2{margin:.8rem 0 .55rem;font-size:clamp(1.7rem,4vw,2.5rem)}.chess-gate p{max-width:37rem;margin:0;color:var(--text-muted)}.chess-gate-code{color:var(--accent)}.chess-start-gate 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var(--acid);outline-offset:3px}.chess-start-option:disabled{opacity:.48;cursor:not-allowed}.chess-quota{margin:.7rem 0 0;color:var(--text-muted);font:.66rem/1.45 var(--font-mono);letter-spacing:.035em}.chess-start-choices.is-compact{margin-top:0}.chess-start-choices.is-compact .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);overflow:hidden;border:1px solid rgba(238,243,247,.16);border-radius:11px;background:#455765;transition:opacity .2s}.chess-board-frame.is-saving{cursor:wait}.chess-saving-chip{position:absolute;right:.7rem;bottom:.7rem;z-index:10;padding:.45rem .65rem;border:1px solid rgba(87,230,230,.35);border-radius:99px;background:#080b10e0;color:var(--accent);font-family:var(--font-mono);font-size:.65rem;letter-spacing:.07em;pointer-events:none}.chess-board-actions,.chess-dialog-actions{display:flex;flex-wrap:wrap;gap:.7rem}.chess-board-actions{align-items:center;justify-content:flex-end;flex-wrap:nowrap;flex:0 0 auto;gap:0;border-left:1px solid rgba(255,255,255,.1)}.chess-toolbar-quota{display:flex;min-height:3.25rem;padding:0 .85rem;align-items:center;border-right:1px solid rgba(255,255,255,.1);color:var(--accent);font:.62rem/1.35 var(--font-mono);letter-spacing:.025em;white-space:nowrap}.chess-board-actions .chess-button{min-height:3.25rem;padding:.65rem .85rem;border-width:0 0 0 1px;border-color:#ffffff1a;border-radius:0;background:#070c115c;font:600 .62rem/1 var(--font-mono);letter-spacing:.035em;text-transform:uppercase;white-space:nowrap}.chess-board-actions .chess-button:first-of-type{border-left:0}.chess-board-actions .chess-button:hover:not(:disabled){border-color:#ffffff1a;background:#57e6e61c;color:var(--accent);transform:none}.chess-board-actions .chess-button:focus-visible{outline-offset:-3px}.chess-button{min-height:2.65rem;padding:.65rem 1rem;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font:600 .85rem var(--font-sans);cursor:pointer;transition:border-color .2s,background .2s,transform .2s}.chess-button:hover:not(:disabled){border-color:var(--accent);background:#57e6e614;transform:translateY(-1px)}.chess-button:focus-visible,.chess-promotion-options button:focus-visible,.chess-error button:focus-visible{outline:2px solid var(--acid);outline-offset:3px}.chess-button:disabled{opacity:.5;cursor:not-allowed}.chess-button-primary{border-color:var(--accent);background:var(--accent);color:var(--bg)}.chess-button-primary:hover:not(:disabled){background:var(--acid);border-color:var(--acid)}.chess-button-danger{border-color:#f871718c;color:#fecaca}.chess-history{display:grid;max-height:min(31rem,calc(100dvh - 12rem));overflow:hidden;border:1px solid var(--border);border-radius:12px;background:#111820d1;grid-template-rows:auto minmax(10rem,1fr) auto}.chess-history header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.1rem;border-bottom:1px solid 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 rgba(254,202,202,.45);border-radius:5px;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase}.chess-storage-warning{bottom:5.5rem;border-color:#ff9f788c;background:#2a1a11f5;color:#ffd1bd}.chess-dialog-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:120;display:grid;padding:1rem;place-items:center;background:#04070ac7;-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px)}.chess-dialog{width:min(100%,29rem);padding:1.5rem;border:1px solid var(--border);border-radius:12px;background:var(--surface-raised);box-shadow:0 2rem 6rem #0000008c}.chess-new-game-dialog{width:min(100%,36rem)}.chess-stockfish-dialog{width:min(100%,47rem);max-height:min(90dvh,52rem);overflow-y:auto}.chess-new-game-dialog .chess-dialog-actions{margin-top:1.2rem}.chess-dialog-code{color:var(--accent)}.chess-dialog h2{margin:.35rem 0 .65rem;font-size:1.75rem}.chess-dialog p{margin:0 0 1.35rem;color:var(--text-muted)}.chess-dialog-actions{justify-content:flex-end}.chess-setup-group{min-width:0;margin:0 0 1.25rem;padding:0;border:0}.chess-setup-group legend{margin-bottom:.65rem;color:var(--text-muted);font:.68rem/1.3 var(--font-mono);letter-spacing:.09em;text-transform:uppercase}.chess-setup-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem}.chess-difficulty-options{grid-template-columns:repeat(4,minmax(0,1fr))}.chess-setup-options label{position:relative;display:grid;min-height:4.65rem;padding:.8rem;align-content:center;border:1px solid var(--border);border-radius:9px;background:var(--surface);cursor:pointer;transition:border-color .2s,background .2s,box-shadow .2s}.chess-setup-options label:hover,.chess-setup-options label.is-selected{border-color:var(--accent);background:#57e6e617}.chess-setup-options label.is-selected{box-shadow:inset 0 0 0 1px #57e6e640}.chess-setup-options input{position:absolute;width:1px;height:1px;opacity:0}.chess-setup-options label:has(input:focus-visible){outline:2px solid var(--acid);outline-offset:3px}.chess-setup-options strong{font-size:.82rem}.chess-setup-options small{margin-top:.25rem;color:var(--text-muted);font:.62rem/1.4 var(--font-mono)}.chess-engine-notice{display:grid;gap:.28rem;padding:.75rem 1rem;border-top:1px solid var(--border);color:var(--text-muted);font:.62rem/1.4 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;grid-template-columns:1fr;gap:.55rem}.chess-intro h1{font-size:clamp(2.25rem,10vw,2.85rem)}.chess-board-meta,.chess-board-actions,.chess-board-actions .chess-button{width:100%}.chess-gate{min-height:24rem;padding:1.5rem}.chess-start-choices.is-compact .chess-opponent-options,.chess-setup-options,.chess-difficulty-options{grid-template-columns:1fr}.chess-stockfish-dialog{padding:1.1rem}}@media (prefers-reduced-motion: reduce){.chess-gate-orbit{animation:none}.chess-button,.chess-board-frame{transition:none}}