:root{color-scheme:dark;--bg:#121a1b;--panel:#1c2728;--ink:#edf0e7;--muted:#92a3a0;--line:#344344;--accent:#b8d79d;--amber:#e1b979;font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);overscroll-behavior:none}button,input,select{font:inherit}button{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button:active{transform:translateY(1px)}a{color:inherit;text-decoration:none}[hidden]{display:none!important}#app{height:100vh;height:100svh;height:100dvh;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.screen{height:100%;width:100%}.quiet{border:1px solid var(--line);border-radius:7px;background:transparent;color:var(--ink);padding:10px 14px;min-height:40px}.quiet:hover{background:#263435}.primary{border:0;border-radius:8px;background:var(--accent);color:#16241a;padding:15px 20px;font-weight:700;min-height:48px}.danger{border:1px solid #825c54;border-radius:7px;background:#402a27;color:#f4c6b8;padding:12px 18px}.small,.eyebrow,.side-label{font-size:11px;letter-spacing:1.8px;font-weight:600}.hint{font-size:12px;line-height:1.6;color:var(--muted);margin:7px 0 15px}.home{display:flex;flex-direction:column;overflow:auto;padding:24px 5vw 16px}.home-header{display:flex;align-items:center;justify-content:space-between;gap:16px}.wordmark{font-size:25px;letter-spacing:1px;font-weight:800}.wordmark span{font-size:11px;color:var(--muted);letter-spacing:2px;font-weight:400}.header-actions{display:flex;align-items:center;gap:10px}.connection{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:7px}.connection:before{content:'';width:6px;height:6px;border-radius:50%;background:var(--amber)}.connection.online:before{background:var(--accent)}.home-content{display:grid;grid-template-columns:1fr minmax(380px,470px);gap:6vw;align-items:center;flex:1;padding:30px 0}.intro{max-width:510px}.eyebrow{font-size:10px;color:var(--accent);letter-spacing:2px;margin-bottom:28px}.intro h1{font-size:clamp(36px,4.2vw,62px);line-height:1.2;letter-spacing:-2px;font-weight:500;margin:0 0 22px}.lead{color:var(--muted);font-size:15px;line-height:1.8}.intro-rule{width:50px;height:2px;background:var(--accent);margin:40px 0 24px}.setup-note{font-size:12px;letter-spacing:1px}.model-note{color:var(--muted);font-size:12px;line-height:1.7;max-width:410px;margin-top:20px}.setup-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px 28px;box-shadow:0 16px 60px #0002}.card-title{display:flex;align-items:center;justify-content:space-between;padding-bottom:22px;font-size:17px}.card-title .small{color:var(--muted);font-size:9px}.field{display:flex;flex-direction:column;gap:9px;margin-bottom:14px;font-size:13px}.field input:not([type=range]),.field select{border:1px solid #4a5b59;border-radius:7px;background:#162122;color:var(--ink);width:100%;padding:12px;min-height:44px}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}.rating-field{position:relative;margin-top:19px}.rating-field output{position:absolute;right:0;top:-2px;font-size:21px;color:var(--accent);font-variant-numeric:tabular-nums}.rating-field input{margin-top:5px;width:100%;accent-color:var(--accent)}fieldset{border:0;padding:0;margin:17px 0}legend{font-size:13px;margin-bottom:9px}.segments{display:flex;gap:5px;padding:4px;background:#121c1d;border-radius:9px}.segments button{flex:1;border:0;background:none;color:var(--muted);border-radius:6px;min-height:40px}.segments button.selected{background:#384b40;color:var(--accent)}.details{font-size:12px;color:var(--muted);margin:19px 0}.details summary{cursor:pointer}.detail-options{display:grid;gap:12px;padding:16px 0 0}.detail-options input[type=checkbox]{accent-color:var(--accent)}.detail-options .field{margin-top:7px}.start{width:100%;display:flex;justify-content:space-between;align-items:center}.start span{font-size:24px;font-weight:400}.restore{margin-top:10px;width:100%}.home-footer{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;letter-spacing:1px;gap:12px;padding-top:12px}
.game{display:grid;grid-template-rows:minmax(0,65fr) minmax(0,35fr);overflow:hidden}.clocks{display:grid;grid-template-columns:1fr 1fr;position:relative;min-height:0}.clock-panel{border:0;background:#192426;color:var(--ink);text-align:left;padding:clamp(20px,3vw,48px);display:flex;flex-direction:column;justify-content:center;overflow:hidden;user-select:none;-webkit-user-select:none;transition:background .15s,box-shadow .15s}.clock-panel.bot{background:#172021}.clock-panel.active.player{background:#c4d7b5;color:#1a2b22}.clock-panel.active.bot{background:#ddc098;color:#392e1d}.clock-panel.pressed{box-shadow:inset 0 8px 16px #0003;transform:translateY(2px)}.clock-heading,.clock-foot{display:flex;justify-content:space-between;align-items:center;gap:12px}.clock-heading{font-size:17px}.side-label{opacity:.65}.clock-digits{width:100%;padding:4px 0;display:flex;align-items:center;justify-content:center}.digits{width:100%;max-height:37vh;overflow:visible}.segment{fill:currentColor;opacity:.055}.segment.on{opacity:1}.clock-foot{font-size:13px;opacity:.72}.clock-state{padding:6px 12px;border:1px solid currentColor;border-radius:20px;opacity:.9}.clock-divider{position:absolute;width:1px;height:82%;top:9%;left:50%;background:currentColor;opacity:.12;pointer-events:none}.game.right .bot{order:0}.game.right .player{order:1}.controls{padding:12px 20px 8px;background:#101819;display:grid;grid-template-columns:minmax(0,3fr) minmax(0,1.05fr);grid-template-rows:minmax(0,1fr) auto;gap:8px 24px;min-height:0;overflow:hidden}.input-panel{min-height:0;display:flex;flex-direction:column;gap:7px}.entry-line{display:flex;align-items:center;gap:16px;min-height:34px}.entry-line .small{color:var(--muted)}.entry-line output{font-size:25px;font-weight:500;letter-spacing:3px;flex:1}.entry-line button{font-size:22px;padding:1px 18px;min-height:32px}.key-row{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;flex:1;min-height:0;max-height:64px}.key-row button,.promotion button{border:1px solid #415353;border-radius:7px;background:#233334;color:var(--ink);font-size:22px;font-weight:500;min-height:36px}.key-row button:active,.promotion button:active{background:#435747}.key-row button.unavailable{opacity:.35}.promotion{display:flex;align-items:center;gap:10px;font-size:12px;max-height:40px}.promotion button{padding:4px 15px;font-size:18px;min-height:30px}.move-panel{border:1px solid #3d4c48;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-width:0;user-select:none}.move-panel .small{color:var(--muted);font-size:10px}.move-panel output{font-size:clamp(36px,4.6vw,68px);font-weight:500;color:var(--amber);line-height:1.1;max-width:100%;overflow:hidden;text-overflow:ellipsis}.move-hint{font-size:10px;color:var(--muted);text-align:center;padding:0 8px}.move-panel.flashing{animation:move-alert 1.05s ease-in-out infinite}.move-panel.concealed output,.move-panel.concealed .move-hint{visibility:hidden}.control-bar{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:7px;border-top:1px solid #293838;min-height:44px}.control-bar>span{font-size:12px;color:var(--muted);max-width:45%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bar-buttons{display:flex;gap:7px}.bar-buttons .quiet{font-size:12px;min-height:34px;padding:7px 12px}.game.right .controls{grid-template-columns:minmax(0,1.05fr) minmax(0,3fr)}.game.right .move-panel{grid-column:1;grid-row:1}.game.right .input-panel{grid-column:2;grid-row:1}.clock-panel:disabled{opacity:1;cursor:default}
dialog{color:var(--ink);background:#1b2728;border:1px solid #526460;border-radius:14px;padding:24px;width:min(480px,92vw);max-height:90dvh;overflow:auto;box-shadow:0 24px 120px #0008}dialog::backdrop{background:#081111b8;backdrop-filter:blur(6px)}dialog h2{font-size:18px;font-weight:500;margin:0}.dialog-top{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:20px}.dialog-top .quiet{font-size:12px}.menu-options{display:grid;gap:10px}.board-dialog{width:min(760px,92vw)}.board-dialog .dialog-top{flex-wrap:wrap}.board-dialog .dialog-top span{font-size:13px;font-variant-numeric:tabular-nums}.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;width:min(100%,58dvh);margin:auto;border:6px solid #304441;border-radius:4px;overflow:hidden}.square{position:relative;display:grid;place-items:center;background:#e2ddc7;aspect-ratio:1;color:#182421;font-family:'Arial Unicode MS','Apple Symbols','Segoe UI Symbol',serif;font-size:clamp(23px,4.2dvh,44px);line-height:1}.square.dark{background:#739282}.square .piece.white-piece{color:#fff8e8;text-shadow:0 1px 1px #122b27,1px 0 1px #122b27,-1px 0 1px #122b27}.square .coordinate{position:absolute;left:3px;bottom:2px;font-family:Arial,sans-serif;font-size:9px;opacity:.75}.confirm-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.toast{position:fixed;bottom:calc(16px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);background:#d9e5cf;color:#183025;border-radius:8px;padding:13px 20px;z-index:100;max-width:90vw;font-size:13px;box-shadow:0 6px 35px #0004}
@keyframes move-alert{0%,100%{box-shadow:inset 0 0 0 1px transparent;border-color:#3d4c48}50%{box-shadow:inset 0 0 0 2px var(--amber);border-color:var(--amber)}}
.pgn-text{width:100%;height:40dvh;resize:vertical;border:1px solid var(--line);border-radius:7px;background:#101819;color:var(--ink);padding:14px;font-family:Consolas,monospace;font-size:13px;line-height:1.7}
@media(max-width:850px){.home{padding:20px}.home-content{grid-template-columns:1fr;gap:25px;padding-top:30px}.intro h1{font-size:35px;letter-spacing:-1px}.intro-rule,.setup-note,.eyebrow{display:none}.lead{margin-bottom:0}.intro .model-note{margin-top:10px}.setup-card{max-width:600px;width:100%;justify-self:center}.header-actions .connection{display:none}.home-footer span:last-child{display:none}.clock-panel{padding:22px 16px}.clock-heading{font-size:14px}.controls{gap:8px 12px;padding:10px 12px 6px;grid-template-columns:3fr 1.1fr}.game.right .controls{grid-template-columns:1.1fr 3fr}.key-row{gap:4px}.key-row button{font-size:20px}.entry-line{gap:8px}.entry-line .small{font-size:9px;letter-spacing:1px}.move-panel .small{font-size:8px;letter-spacing:1px}.move-hint{font-size:9px}.control-bar>span{max-width:30%}.bar-buttons .quiet{padding:7px 8px;font-size:11px}}
@media(max-height:720px){.home-content{align-items:start}.intro{padding-top:60px}.home{padding-top:16px}.controls{padding-top:7px}.input-panel{gap:4px}.entry-line output{font-size:21px}.key-row{max-height:48px}.move-panel{gap:8px}.clock-panel{padding:20px}.clock-digits .digits{max-height:30vh}.promotion{position:absolute;bottom:70px;left:28%;background:#172323;padding:7px 12px;border:1px solid var(--line);border-radius:8px;z-index:3;max-height:none}}
@media(prefers-reduced-motion:reduce){.move-panel.flashing{animation:none;border-color:var(--amber);box-shadow:inset 0 0 0 2px var(--amber)}}
.review{display:grid;place-items:center;overflow:auto;padding:30px 24px}.review-card{width:min(780px,100%);padding:34px 40px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.review-card h1{font-size:32px;font-weight:500;margin:0 0 12px}.review-card .eyebrow{margin:0 0 18px}.review-details{display:grid;grid-template-columns:140px minmax(0,1fr);gap:18px 28px;margin:30px 0}.review-details dt{color:var(--muted);font-size:13px}.review-details dd{margin:0;font-size:15px;line-height:1.6}.review-actions{display:flex;justify-content:space-between;gap:16px;margin-top:28px}@media(max-width:600px){.review-card{padding:24px}.review-details{grid-template-columns:1fr;gap:7px}.review-details dd{margin-bottom:12px}.review-actions{flex-direction:column-reverse}}