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1px 2px #0000000f, 0 4px 16px #0000000f;--radius:10px;--eval-dark:#403d39;--eval-light:#f0f0f0;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--accent:#e5694a;--bg:#171615;--surface:#252321;--surface-2:#2f2c29;--text:#efebe4;--muted:#a29b90;--border:#3a3633;--shadow:0 1px 2px #0006, 0 4px 16px #00000059;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;color:var(--text);-webkit-tap-highlight-color:transparent;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}button{font:inherit}#top{z-index:20;background:var(--surface);border-bottom:1px solid var(--border);height:56px;box-shadow:0 1px 0 var(--primary), var(--shadow);justify-content:space-between;align-items:center;margin-bottom:16px;padding:0 max(24px,50% - 620px);display:flex;position:sticky;top:0}#top h1{letter-spacing:-.01em;align-items:center;gap:8px;margin:0;font-size:22px;font-weight:600;display:flex}#top h1 b{color:var(--accent);font-weight:800}.logo{color:var(--primary);font-size:26px;line-height:1}#top .tools{align-items:center;gap:8px;display:flex}.icon-btn{border:1px solid var(--border);background:var(--surface);width:38px;height:38px;color:var(--text);cursor:pointer;border-radius:50%;place-items:center;text-decoration:none;display:grid}#top .icon-btn:hover{border-color:var(--primary);color:var(--accent)}#game{--size:clamp(520px, min(calc(100vh - 130px), calc(100vw - 28px - 340px - 32px - 48px)), 720px);grid-template-columns:28px var(--size) 340px;justify-content:center;align-items:start;gap:16px;padding:0 24px 32px;display:grid}#wrap{width:var(--size);height:var(--size);position:relative}#board{width:100%;height:100%;box-shadow:var(--shadow);border-radius:6px;overflow:hidden}#evalbar{width:28px;height:var(--size);background:var(--eval-dark);--eval:.5;border-radius:6px;position:relative;overflow:hidden}#evalfill{height:calc(var(--eval) * 100%);background:var(--eval-light);transition:height .4s;position:absolute;bottom:0;left:0;right:0}#evaltext{text-align:center;white-space:nowrap;font-size:10px;font-weight:700;position:absolute;left:0;right:0}#evaltext.white-lead{color:var(--eval-dark);bottom:6px}#evaltext.black-lead{color:var(--eval-light);top:6px}#evalbar.flip #evalfill{top:0;bottom:auto}#evalbar.flip #evaltext.white-lead{top:6px;bottom:auto}#evalbar.flip #evaltext.black-lead{top:auto;bottom:6px}#side{height:var(--size);flex-direction:column;gap:8px;min-height:0;display:flex}.player{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);align-items:center;gap:12px;padding:9px 12px;display:flex}.avatar{border-radius:8px;flex:none;place-items:center;width:44px;height:44px;font-size:13px;font-weight:700;display:grid}.av-you{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}.av-ai{background:var(--primary);color:var(--on-primary)}.info{min-width:0}.name{font-size:15px;font-weight:600}.captured{flex-wrap:wrap;align-items:center;min-height:22px;margin-top:2px;display:flex}.captured piece{background-size:cover;width:20px;height:20px;margin-right:1px;display:block;position:static}.captured piece:last-of-type{margin-right:8px}.points{color:var(--muted);margin-left:8px;font-size:12px;font-weight:700}#moves{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);min-height:0;box-shadow:var(--shadow);font-variant-numeric:tabular-nums;scrollbar-width:none;-ms-overflow-style:none;flex:1;grid-template-columns:40px 1fr 1fr;align-content:start;font-size:14px;display:grid;overflow-y:auto}#moves::-webkit-scrollbar{display:none}#moves>span{padding:7px 10px}#moves .num{color:var(--muted);background:var(--surface-2);text-align:right}#moves .mv{border-radius:4px;font-weight:600}#moves .mv[data-ply]{cursor:pointer}#moves .mv[data-ply]:hover{background:var(--surface-2)}#moves .mv.active{background:var(--primary);color:var(--on-primary)}#moves .empty{color:var(--muted);text-align:center;grid-column:1/-1;padding:20px;font-weight:400}#nav{grid-template-columns:repeat(5,1fr);gap:6px;display:grid}#nav .copy-icon{place-items:center;margin-left:4px;display:grid}#nav button{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:8px;padding:5px 0;font-size:18px;line-height:1}#nav button:hover:not(:disabled){border-color:var(--primary);color:var(--accent)}#nav button:disabled{opacity:.35;cursor:default}#nav button:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:1px}#controls{flex-direction:column;gap:8px;display:flex}#levels,#sides{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;display:grid}#levels button,#sides button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:7px;flex-direction:column;align-items:center;gap:1px;padding:7px 4px;transition:background .15s,color .15s;display:flex}#levels button b,#sides button b{font-size:13px}#levels button small{opacity:.8;font-size:10px}#levels button:hover,#sides button:hover{color:var(--text)}#levels button.active,#sides button.active{background:var(--primary);color:var(--on-primary)}#levels button.loading:before{content:"";border:2px solid;border-right-color:#0000;border-radius:50%;flex:none;width:12px;height:12px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}#levels button.loading:disabled{opacity:1}#reset:disabled{opacity:.55;cursor:not-allowed}#levels button:disabled{cursor:not-allowed}#levels button:disabled:not(.active){opacity:.45}#levels button:disabled:hover{color:var(--muted)}#levels button.active:disabled:hover{color:var(--on-primary)}#levels button:focus-visible,#sides button:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:1px}.elo{color:var(--muted);font-size:11px;font-weight:500;display:block}#status:empty{display:none}#status{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:10px 14px;font-size:14px;font-weight:600}#levels button,#sides button{flex-direction:row;justify-content:center;gap:6px;padding:7px 4px}#sides .glyph{font-size:15px;line-height:1}#controls .actions{flex-direction:column;gap:8px;display:flex}.secondary{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);cursor:pointer;padding:12px 16px;font-weight:600}.secondary:hover:not(:disabled){border-color:var(--primary);color:var(--accent)}.secondary:disabled{opacity:.4;cursor:default}.secondary:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px}#reset{border-radius:var(--radius);background:var(--primary);color:var(--on-primary);cursor:pointer;border:0;padding:12px 16px;font-weight:700;transition:background .15s,transform 50ms}#reset:hover{background:var(--primary-hover)}#reset:active{transform:translateY(1px)}#reset:focus-visible,.icon-btn:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 45%, transparent);outline-offset:2px}#thoughts{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);flex:none;padding:9px 12px}.t-head{justify-content:space-between;align-items:baseline;margin-bottom:6px;display:flex}.t-title{letter-spacing:.06em;text-transform:uppercase;color:var(--accent);font-size:12px;font-weight:700}.t-live{color:var(--muted);font-size:11px}.t-empty{color:var(--muted);margin:0;font-size:13px}.dots:after{content:"";text-align:left;width:1.2em;animation:1s steps(4,end) infinite dots;display:inline-block}@keyframes dots{0%{content:""}25%{content:"."}50%{content:".."}75%{content:"..."}}.t-wdl{background:var(--surface-2);border-radius:4px;height:16px;margin-bottom:6px;display:flex;overflow:hidden}.t-wdl i{flex:0;align-items:center;padding:0 6px;font-size:10px;font-style:normal;font-weight:700;transition:flex-grow .7s;display:flex;overflow:hidden}.t-wdl.show i{flex-grow:calc(var(--v) * 1000)}.t-wdl .w{color:#403d39;background:#f0f0f0}.t-wdl .d{background:#9a948b}.t-wdl .l{color:#f0f0f0;background:#403d39;justify-content:flex-end}.t-rows{flex-direction:column;gap:2px;display:flex}.cand{opacity:0;border-radius:6px;grid-template-columns:16px 54px 1fr 38px 28px;align-items:center;gap:8px;padding:2px 8px;font-size:13px;transition:opacity .25s,transform .25s,background .2s;display:grid;transform:translate(-8px)}.cand.show{opacity:1;transform:none}.cand.dim{opacity:.4}.cand.picked{opacity:1;background:color-mix(in srgb, var(--primary) 16%, transparent)}.cand .rank{color:var(--muted);font-size:11px}.cand .san{font-variant-numeric:tabular-nums;font-weight:700}.cand .bar{background:var(--surface-2);border-radius:4px;height:8px;overflow:hidden}.cand .bar i{background:#3b82f6;border-radius:4px;width:0;height:100%;transition:width .55s cubic-bezier(.2,.8,.2,1);display:block}.cand.show .bar i{width:calc(var(--p) * 100%)}.cand.picked .bar i{background:var(--primary)}.cand .pc{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums;font-size:12px}.cand .q{text-align:right;color:var(--muted);opacity:.75;font-variant-numeric:tabular-nums;font-size:11px}.cand.picked .pc{color:var(--accent);font-weight:700}.cand.scan{opacity:1;transform:none}.cand.scan .bar i{background:linear-gradient(90deg, transparent, var(--muted), transparent);width:40%;animation:1s ease-in-out infinite scan}@keyframes scan{0%{transform:translate(-100%)}to{transform:translate(250%)}}@media (prefers-reduced-motion:reduce){.cand,.cand .bar i,.t-wdl i{transition:none}.dots:after,.cand.scan .bar i{animation:none}}.cg-wrap cg-board square.last-move{background-color:#b02e0c52}.cg-wrap cg-board square.selected{background-color:#b02e0c80}#promo{z-index:10;background:#00000073;position:absolute;inset:0}#promo[hidden]{display:none}#promo .card{background:var(--surface);border-radius:4px;flex-direction:column;width:12.5%;display:flex;position:absolute;overflow:hidden;box-shadow:0 6px 24px #00000073}#promo .card.top{top:0}#promo .card.bottom{bottom:0}#promo .choice{aspect-ratio:1;cursor:pointer;transition:background .1s}#promo .choice:hover{background:color-mix(in srgb, var(--primary) 25%, var(--surface))}#promo .choice piece{pointer-events:none;background-size:cover;width:100%;height:100%;transition:transform .1s;display:block;position:static}#promo .choice:hover piece{transform:scale(1.08)}@media (width<=1000px){#top{height:52px;margin-bottom:0;padding:0 14px}#game{--size:min(100vw, 640px);grid-template-columns:1fr;align-items:stretch;gap:0;max-width:640px;margin:0 auto;padding:0 0 24px}#side{display:contents}#evalbar{border-radius:0;order:0;width:100%;height:16px}#evalfill{width:calc(var(--eval) * 100%);height:auto;transition:width .4s;top:0;right:auto}#evaltext{width:auto;font-size:10px;line-height:1;top:50%;left:auto;right:auto;transform:translateY(-50%)}#evaltext.white-lead{bottom:auto;left:8px}#evaltext.black-lead{top:50%;right:8px}#evalbar.flip #evalfill{left:auto;right:0}#evalbar.flip #evaltext.white-lead{inset:50% 8px auto auto}#evalbar.flip #evaltext.black-lead{inset:50% auto auto 8px}#moves{white-space:nowrap;box-shadow:none;border:0;border-bottom:1px solid var(--border);border-radius:0;flex:none;order:1;gap:2px;font-size:13px;display:flex;overflow:auto hidden}#moves>span{padding:8px 4px}#moves .num{text-align:left;background:0 0;padding-left:10px}#moves .mv{padding-right:6px}#moves .empty{text-align:left;padding:8px 14px}#moves .mv{padding-left:6px}#nav{display:none}#p-top{order:2}#thoughts{order:3}#wrap{width:var(--size);height:var(--size);order:4}#board{box-shadow:none;border-radius:0}#p-bottom{order:5}#controls{flex-flow:wrap;order:6;align-items:stretch;gap:10px;padding:12px}#levels,#sides{flex:1 0 100%}#controls .actions{flex-direction:row;flex:1 0 100%}#status{text-align:left;flex:1;align-items:center;display:flex}#reset{flex:1}.player{box-shadow:none;border:0;border-radius:0;gap:10px;padding:8px 12px}#p-top{border-bottom:1px solid var(--border)}#p-bottom{border-top:1px solid var(--border)}.avatar{width:38px;height:38px;font-size:11px}.name{font-size:14px}.captured{margin-top:0}#thoughts{box-shadow:none;border:0;border-bottom:1px solid var(--border);border-radius:0;align-items:center;gap:10px;min-height:40px;padding:6px 12px;display:flex;overflow-x:auto}.t-head{flex:none;margin:0}.t-live,.t-wdl,.t-empty{display:none}.t-rows{flex-direction:row;gap:6px}.cand{background:var(--surface-2);white-space:nowrap;border-radius:999px;flex:none;grid-template-columns:auto auto;gap:6px;padding:4px 10px;transform:none}.cand .rank,.cand .bar,.cand .q{display:none}.cand.picked{box-shadow:none;background:var(--primary);color:var(--on-primary)}.cand.picked .pc{color:var(--on-primary)}}.board-over{z-index:20;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0000008c;place-items:center;padding:12px;animation:.18s ease-out pop;display:grid;position:absolute;inset:0}.board-over .dlg{background:var(--surface);color:var(--text);border-radius:16px;width:min(340px,100%);box-shadow:0 24px 64px #00000080}@keyframes pop{0%{opacity:0;transform:translateY(8px)scale(.98)}}.dlg{text-align:center;flex-direction:column;align-items:stretch;gap:14px;padding:22px;display:flex}.dlg h2{letter-spacing:-.01em;margin:0;font-size:24px}.dlg .sub{color:var(--muted);margin:0;font-size:14px}.dlg button{font:inherit;cursor:pointer}.dlg .ghost{color:var(--muted);background:0 0;border:0;padding:8px;font-weight:600}.dlg .ghost:hover{color:var(--text)}.dlg .primary{border-radius:var(--radius);background:var(--primary);color:var(--on-primary);border:0;padding:13px 16px;font-weight:700}.dlg .primary:hover{background:var(--primary-hover)}.dlg .secondary{padding:12px 16px}.over .badge{background:var(--surface-2);border-radius:50%;place-items:center;width:72px;height:72px;margin:0 auto;font-size:40px;line-height:1;display:grid}.over.win .badge{background:var(--primary);color:var(--on-primary);box-shadow:0 0 0 8px color-mix(in srgb, var(--primary) 22%, transparent)}.over.loss .badge{color:#f4f1ec;background:#2b2926}.over .over-actions{flex-direction:column;gap:8px;margin-top:6px;display:flex}#toast{background:var(--text);color:var(--bg);opacity:0;pointer-events:none;z-index:100;border-radius:999px;padding:10px 16px;font-size:14px;font-weight:600;transition:opacity .2s,transform .2s;position:fixed;bottom:24px;left:50%;transform:translate(-50%,16px)}#toast.show{opacity:1;transform:translate(-50%)}@media (prefers-reduced-motion:reduce){.board-over{animation:none}#toast{transition:none}}html{scroll-behavior:smooth;scroll-padding-top:72px}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}#about{max-width:1240px;margin:0 auto;padding:24px}.about-inner{border-top:1px solid var(--border);max-width:860px;margin:0 auto;padding-top:40px;font-size:16px;line-height:1.65}.about-inner h2{letter-spacing:-.02em;margin:0 0 12px;font-size:28px}.about-inner h2+.lede,.about-inner .lede{color:var(--text);font-size:18px}.about-inner h3{color:var(--accent);margin:40px 0 12px;font-size:20px}.about-inner h4{margin:0 0 6px;font-size:15px}.about-inner p{margin:0 0 14px}.about-inner a{color:var(--accent);text-underline-offset:3px}.about-inner code{background:var(--surface-2);white-space:nowrap;border-radius:5px;padding:2px 6px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.9em}.about-inner em{font-style:normal;font-weight:600}.pipeline{counter-reset:step;gap:10px;margin:0;padding:0;list-style:none;display:grid}.pipeline li{counter-increment:step;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;gap:4px;padding:14px 16px 14px 56px;display:flex;position:relative}.pipeline li:before{content:counter(step);background:var(--primary);width:28px;height:28px;color:var(--on-primary);border-radius:50%;place-items:center;font-size:14px;font-weight:700;display:grid;position:absolute;top:14px;left:14px}.pipeline li:not(:last-child):after{content:"";background:var(--primary);opacity:.45;width:2px;height:11px;position:absolute;bottom:-11px;left:27px}.pipeline li span{color:var(--muted);font-size:15px;line-height:1.55}.pipeline li i{color:var(--text);font-style:normal;font-weight:700}.cards{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.card-a{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.card-a p{color:var(--muted);margin:0;font-size:15px;line-height:1.55}.card-a b{color:var(--text)}.steps{margin:0 0 14px;padding-left:22px}.steps li{margin-bottom:6px;padding-left:4px}.about-inner details{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);margin:16px 0}.about-inner summary{cursor:pointer;color:var(--accent);padding:12px 16px;font-weight:600}.about-inner details[open] summary{border-bottom:1px solid var(--border)}.math{padding:16px 16px 2px;font-size:15px}#credits{margin-top:56px;scroll-margin-top:72px}.credits{grid-template-columns:1fr 1fr;gap:28px;font-size:14.5px;line-height:1.55;display:grid}.credits ul{margin:0 0 16px;padding-left:18px}.credits li{margin-bottom:6px}.disclaimer{color:var(--muted);margin-top:24px;font-size:13.5px}#foot{text-align:center;max-width:860px;color:var(--muted);margin:0 auto;padding:8px 24px 40px;font-size:14px}#foot a{color:var(--muted);text-underline-offset:3px}#foot a:hover{color:var(--accent)}@media (width<=1000px){#about{padding:16px 16px 8px}.about-inner{padding-top:28px;font-size:15.5px}.about-inner h2{font-size:24px}.cards,.credits{grid-template-columns:1fr}}