:root{color-scheme:dark;--bg: #080808;--surface: #111;--raised: #1b1b1b;--text: #eee;--muted: #999;--line: #303030;--accent: #fff;--on-accent: #080808;--light-square: #c7c7c7;--dark-square: #686868;--animation: .12s}:root[data-theme=light]{color-scheme:light;--bg: #f5f5f5;--surface: #fff;--raised: #eee;--text: #111;--muted: #606060;--line: #d2d2d2;--accent: #111;--on-accent: #fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select,textarea{font:inherit}button,a,label.file-button{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button,input,select,textarea,.file-button{border:1px solid var(--line);border-radius:8px;background:var(--raised);color:var(--text);padding:.65rem .85rem;min-height:42px}button:hover:not(:disabled){border-color:var(--muted);background:var(--line)}button.primary{background:var(--accent);color:var(--on-accent);font-weight:650;border-color:var(--accent)}button.primary:hover{opacity:.85;background:var(--accent)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}a{color:var(--text)}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip-path:inset(50%)}.skip{position:fixed;z-index:100;top:-100px;left:1rem;background:var(--surface);padding:1rem}.skip:focus{top:0}header,main,footer{max-width:1240px;margin:auto;padding:0 1.5rem}header{display:flex;justify-content:space-between;align-items:center;min-height:86px;border-bottom:1px solid var(--line);gap:1rem}.brand{font:2rem Georgia,serif;text-decoration:none;letter-spacing:-.08em}.brand span{font:11px monospace;letter-spacing:0;margin-left:.3rem;color:var(--muted)}nav{display:flex;gap:.3rem;flex-wrap:wrap}nav button{background:transparent;border-color:transparent;color:var(--muted)}nav button.active{color:var(--text);background:var(--raised)}.page-heading{display:flex;align-items:end;justify-content:space-between;gap:2rem;padding:3rem 0 2rem}.page-heading h1{font:clamp(2.4rem,5vw,4.2rem)/1.05 Georgia,serif;letter-spacing:-.055em;margin:0}.eyebrow{font:10px/1.5 monospace;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);margin:0 0 .65rem}h2{font-size:1.35rem;letter-spacing:-.025em;margin:.2rem 0 1rem}h3{font-size:.85rem;margin:0 0 .7rem}p{color:var(--muted)}#connection-status{font:12px monospace;max-width:300px;text-align:right}.workspace{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);gap:2rem;align-items:start}.board-column{min-width:0;position:sticky;top:1rem}.board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));aspect-ratio:1;width:100%;overflow:hidden;border-radius:7px;box-shadow:0 12px 50px #0003;touch-action:none;user-select:none}.square{position:relative;aspect-ratio:1;min-height:0;width:100%;border:0;border-radius:0;padding:0;background:var(--light-square);display:grid;place-items:center;color:#111;isolation:isolate}.square.dark{background:var(--dark-square);color:#eee}.square:hover:not(:disabled){background:var(--light-square);border:0}.square.dark:hover:not(:disabled){background:var(--dark-square)}.square:focus-visible{z-index:2;outline:3px solid #111;outline-offset:-4px}.square img{width:86%;height:86%;object-fit:contain;pointer-events:none;z-index:1;filter:drop-shadow(0 2px 1px #0003);animation:piece-appear var(--animation) ease}.square img[hidden]{display:none}.square.selected{box-shadow:inset 0 0 0 5px #fff}.square.last:before{content:"";position:absolute;inset:0;background:#fff3;pointer-events:none}.square.legal:after{content:"";position:absolute;width:22%;height:22%;border-radius:50%;background:#1119;z-index:2;pointer-events:none}.square.legal:has(img:not([hidden])):after{width:90%;height:90%;border:4px solid #1119;background:transparent}.square.check{box-shadow:inset 0 0 0 5px #111;background:repeating-linear-gradient(45deg,#aaa 0 5px,#ddd 5px 10px)}.coordinate{position:absolute;left:4px;bottom:2px;font:10px monospace;opacity:.65;z-index:2;pointer-events:none}.no-coordinates .coordinate{display:none}.blind img{visibility:hidden}.board.outline img{filter:contrast(1.6) drop-shadow(0 1px 0 #fff)}.player-bar{display:flex;align-items:center;gap:.8rem;padding:.8rem .1rem;min-height:55px;font-size:.85rem}.clock{margin-left:auto;font:1.5rem monospace;padding:.3rem .7rem;border:1px solid var(--line);border-radius:6px;min-width:100px;text-align:right;background:var(--surface);font-variant-numeric:tabular-nums}.clock.running{background:var(--accent);color:var(--on-accent)}.captures{font-size:.8rem;color:var(--muted);letter-spacing:.1em}.board-tools,.button-row{display:flex;gap:.45rem;flex-wrap:wrap}.board-tools{margin-top:.75rem}.board-tools button{flex:1;font-size:.75rem;padding:.5rem;white-space:nowrap}.game-message{padding:.8rem 0;margin:0;font-size:.85rem;min-height:3rem}.game-panel{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:1.3rem;min-width:0}.game-panel section+section{margin-top:1.25rem;padding-top:1.25rem;border-top:1px solid var(--line)}label{display:grid;gap:.35rem;color:var(--muted);font-size:.75rem;margin-bottom:.8rem}input,select,textarea{width:100%;min-width:0}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.7rem}.full{width:100%}.position-status p{font-size:.8rem;margin:0}.position-status h2{margin-bottom:.2rem}.move-history{list-style:none;padding:0;margin:0;max-height:220px;overflow:auto;font:13px monospace;counter-reset:moves}.move-history li{display:grid;grid-template-columns:30px 1fr 1fr;gap:.35rem;align-items:center;border-bottom:1px solid var(--line);padding:.2rem 0}.move-history li:before{counter-increment:moves;content:counter(moves) ".";color:var(--muted)}.move-history button{border:0;min-height:30px;background:transparent;text-align:left;padding:.25rem}.game-actions{margin-top:1rem}.game-actions button{font-size:.72rem;flex:1}details{margin-top:1.2rem;border-top:1px solid var(--line);padding-top:1rem}summary{cursor:pointer;font-size:.85rem}.analysis-tools{padding-top:1rem}.analysis-tools p{font-size:.8rem;overflow-wrap:anywhere}.analysis-tools textarea{font:11px/1.6 monospace}.analysis-tools .button-row{margin-bottom:.8rem}.analysis-tools .button-row button{font-size:.72rem}canvas{display:block;width:100%;height:170px}#analysis-review{max-height:180px;overflow:auto;font-size:.78rem;white-space:pre-wrap;margin:.5rem 0}#lobby ul{list-style:none;padding:0;font-size:.85rem}#lobby input{font:11px monospace}.training-active{margin:1.5rem 0;padding:1.5rem;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.training-active p{max-width:75ch}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin:1rem 0}.section-heading h2{margin:0;font-size:1.8rem}.section-heading label{min-width:200px}.training-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.training-card{display:flex;flex-direction:column;align-items:start;border:1px solid var(--line);border-radius:12px;padding:1.4rem;background:var(--surface)}.training-card h3{font-size:1.1rem;letter-spacing:-.02em;margin:.25rem 0 .7rem}.training-card p{font-size:.85rem;margin-top:0;flex:1}.training-card select{margin-bottom:.75rem}.training-card button{margin-top:.5rem}.training-card .badge{font:10px monospace;border:1px solid var(--line);border-radius:4px;padding:.2rem .4rem;color:var(--muted)}.stats-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:.7rem}.stat{padding:1.3rem;border:1px solid var(--line);border-radius:10px;background:var(--surface)}.stat strong{display:block;font:2rem monospace}.stat span{font-size:.75rem;color:var(--muted)}#game-records,#training-records{margin:1rem 0 2rem}.record-row{display:flex;justify-content:space-between;gap:1rem;padding:.7rem;border-bottom:1px solid var(--line);font-size:.8rem;align-items:center}.record-row button{font-size:.75rem}footer{margin-top:4rem;padding-top:1.5rem;padding-bottom:2rem;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:1rem;font-size:.7rem;color:var(--muted)}footer a{color:var(--muted)}dialog{width:min(620px,calc(100% - 1.5rem));max-height:90dvh;overflow:auto;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--text);padding:1.5rem}dialog::backdrop{background:#000b;backdrop-filter:blur(5px)}dialog h2{margin-top:0}.toggle-list{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin:1rem 0}.toggle-list label{display:flex;align-items:center;margin:0}.toggle-list input{width:18px;min-height:18px;accent-color:var(--text)}.small-board{max-width:400px;margin:1rem auto}.small-board .square{font-size:1rem}#promotion-options button img{width:50px;height:50px}.file-button{display:inline-flex;align-items:center;position:relative;cursor:pointer;margin:0}.file-button input{position:absolute;inset:0;opacity:0;cursor:pointer}#toast{position:fixed;bottom:1rem;left:50%;transform:translate(-50%,2rem);padding:.7rem 1rem;background:var(--raised);border:1px solid var(--line);border-radius:9px;z-index:100;max-width:90%;opacity:0;pointer-events:none;transition:.15s}#toast.visible{opacity:1;transform:translate(-50%)}@keyframes piece-appear{0%{opacity:.5;transform:scale(.92)}to{opacity:1;transform:scale(1)}}@media(max-width:950px){.workspace{grid-template-columns:minmax(0,1.3fr) minmax(270px,1fr);gap:1rem}.game-panel{padding:1rem}.training-grid{grid-template-columns:repeat(2,1fr)}header,main,footer{padding-left:1rem;padding-right:1rem}}@media(max-width:700px){header{min-height:74px;align-items:center}.brand{font-size:1.6rem}nav{gap:0}nav button{font-size:.7rem;padding:.5rem;min-height:40px}.workspace{grid-template-columns:1fr}.board-column{position:static}.page-heading{padding:2rem 0 1rem;display:block}.page-heading p#connection-status{text-align:left;max-width:none}.game-panel{margin-top:.5rem}.training-grid{grid-template-columns:1fr}.section-heading{display:block}.section-heading label{margin-top:1rem}.stats-summary{grid-template-columns:repeat(2,1fr)}.clock{font-size:1.15rem;min-width:82px}.coordinate{font-size:8px}.board-tools{gap:.3rem}.board-tools button{font-size:.65rem;min-height:44px}.record-row{flex-wrap:wrap}.square img{width:90%;height:90%}footer{flex-direction:column}.player-bar{padding:.5rem 0}.toggle-list{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}html.reduce-motion *,html.reduce-motion *:after,html.reduce-motion *:before{animation:none!important;transition:none!important}.coordinate{top:3px;bottom:auto}.coordinate.file-coordinate{inset:auto 4px 2px auto}