:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--paper:#f5f5ef;--paper-2:#eaeae0;--paper-3:#dfe0d3;--felt:#1e4a33;--felt-deep:#163a28;--felt-line:#2c5f43;--ink:#14211a;--ink-2:#3a4740;--muted:#66706a;--green:#2b6b45;--green-ink:#f5f5ef;--wood:#d18b47;--wood-light:#ffce9e;--ivory:#f3efe4;--ivory-muted:#b9c7bc;--err:#a8321f;--err-soft:#f4dcd6;--line:#d3d6ca;--line-strong:#b5b9ab;--font-head:"Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;--font-body:"Source Serif 4", "Iowan Old Style", Georgia, "Times New Roman", serif;--font-mono:"JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--container:1200px;--gutter:clamp(1rem, 4vw, 2.5rem);--rail:15rem}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--paper:#171c19;--paper-2:#1f2521;--paper-3:#2a312c;--felt:#16382a;--felt-deep:#102a1f;--felt-line:#234a37;--ink:#eaeadf;--ink-2:#c3c8bd;--muted:#8d968f;--green:#7fc79a;--green-ink:#10241a;--err:#ff9a86;--err-soft:#3d201a;--line:#2f3731;--line-strong:#46504a}}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{font-family:var(--font-body);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;font-variant-numeric:oldstyle-nums;margin:0;font-size:1.0625rem;line-height:1.65}h1,h2,h3{font-family:var(--font-head);letter-spacing:-.02em;text-wrap:balance;font-variant-numeric:lining-nums;margin:0;font-weight:700;line-height:1.05}h2{font-size:clamp(1.9rem,1.3rem + 2vw,2.75rem)}h3{letter-spacing:-.01em;font-size:1.25rem;font-weight:600}p{margin:0}a{color:var(--green);text-underline-offset:.15em;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}code,pre,kbd{font-family:var(--font-mono);font-variant-numeric:lining-nums;font-size:.86em}:not(pre)>code{background:var(--paper-2);color:var(--ink);border-radius:4px;padding:.08em .35em}abbr[title]{cursor:help;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}:focus-visible{outline:2px solid var(--green);outline-offset:2px}.container{width:min(100% - 2 * var(--gutter), var(--container));margin-inline:auto}.skip-link{background:var(--felt);color:var(--ivory);z-index:100;border-radius:6px;padding:.5rem .9rem;position:absolute;top:-4rem;left:1rem}.skip-link:focus{top:1rem}chess-board{vertical-align:middle}.btn{border:1.5px solid var(--green);background:var(--green);color:var(--green-ink);font-family:var(--font-head);cursor:pointer;border-radius:6px;align-items:center;gap:.5rem;padding:.7rem 1.2rem;font-size:1rem;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.btn:hover{filter:brightness(1.08)}.btn-ghost{color:var(--green);background:0 0}.btn-ghost:hover{background:var(--paper-2);filter:none}.btn-sm{padding:.35rem .7rem;font-size:.85rem}.icon-btn{border:1.5px solid var(--felt-line);block-size:2.4rem;inline-size:2.4rem;color:var(--ivory);cursor:pointer;background:0 0;border-radius:6px;place-items:center;font-size:.9rem;display:inline-grid}.icon-btn:hover{background:var(--felt-line)}.icon-btn-primary{background:var(--wood);border-color:var(--wood);color:#2b1a08}.icon-btn-primary:hover{background:var(--wood-light);border-color:var(--wood-light)}.codeblock-wrap{position:relative}.codeblock{background:var(--paper-2);color:var(--ink);white-space:pre;tab-size:2;border-radius:6px;margin:0;padding:.9rem 1.1rem;font-size:.875rem;line-height:1.55;overflow-x:auto}.codeblock code{font-size:inherit}.codeblock-inline{padding-right:5rem}.tok-muted{color:var(--muted)}.tok-kw,.tok-tag,.tok-sel{color:var(--green);font-weight:600}.tok-str,.tok-num{color:var(--ink-2)}.copy-btn{border:1px solid var(--line-strong);background:var(--paper);color:var(--ink-2);font-family:var(--font-head);cursor:pointer;border-radius:4px;padding:.3rem .6rem;font-size:.8rem;font-weight:600;position:absolute;top:.5rem;right:.5rem}.copy-btn:hover{border-color:var(--green);color:var(--green)}.copy-btn.is-copied{border-color:var(--green);background:var(--green);color:var(--green-ink)}.topbar{z-index:50;background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:1rem;min-height:3.5rem;display:flex}.brand{color:var(--ink);font-family:var(--font-head);letter-spacing:-.01em;align-items:center;gap:.55rem;font-size:1.05rem;font-weight:700;text-decoration:none;display:inline-flex}.brand-mark{font-size:1.4rem;line-height:1}.brand-version{color:var(--muted);font-variant-numeric:lining-nums;font-size:.85rem;font-weight:500}.brand-version:empty{display:none}.topnav{font-family:var(--font-head);scrollbar-width:none;gap:clamp(.8rem,2vw,1.6rem);font-size:.95rem;font-weight:500;display:flex;overflow-x:auto}.topnav::-webkit-scrollbar{display:none}.topnav a{color:var(--ink-2);white-space:nowrap;text-decoration:none}.topnav a:hover{color:var(--green);text-decoration:underline}.hero{color:var(--ivory);background-color:var(--felt);background-image:repeating-conic-gradient(#ffffff09 0 25%, transparent 0 50%);background-size:96px 96px}.hero-inner{grid-template-columns:minmax(0,1fr) minmax(0,27rem);align-items:center;gap:clamp(2rem,6vw,5rem);padding-block:clamp(3rem,7vw,5.5rem);display:grid}.hero-copy{max-width:32rem}.display{letter-spacing:-.035em;color:var(--ivory);margin:0 0 1.25rem;font-size:clamp(2.6rem,1.2rem + 6vw,5.25rem);font-weight:800;font-stretch:90%;line-height:.95}.hero .lede{color:var(--ivory);text-wrap:pretty;max-width:30rem;font-size:clamp(1.1rem,1rem + .5vw,1.3rem);line-height:1.5}.hero .lede abbr{-webkit-text-decoration-color:var(--ivory-muted);text-decoration-color:var(--ivory-muted)}.install-row{max-width:24rem;margin-top:1.75rem;position:relative}.hero .codeblock{background:var(--felt-deep);color:var(--ivory)}.hero .tok-muted{color:var(--ivory-muted)}.hero .copy-btn{border-color:var(--felt-line);color:var(--ivory-muted);background:0 0}.hero .copy-btn:hover{color:var(--ivory);border-color:var(--ivory-muted)}.hero .copy-btn.is-copied{background:var(--wood);border-color:var(--wood);color:#2b1a08}.cta-row{flex-wrap:wrap;gap:.75rem;margin-top:1rem;display:flex}.hero .btn-primary{background:var(--ivory);border-color:var(--ivory);color:var(--felt-deep)}.hero .btn-ghost{border-color:var(--ivory-muted);color:var(--ivory)}.hero .btn-ghost:hover{background:var(--felt-line)}.facts{color:var(--ivory-muted);gap:.35rem;margin:2rem 0 0;padding:0;font-size:.98rem;list-style:none;display:grid}.facts strong{color:var(--ivory);font-weight:600}.hero-figure{min-width:0;margin:0}.board-lg{font-size:clamp(26px,5vw,42px)}.hero .board-well{background:0 0;place-items:center;padding:0;display:grid}.hero chess-board{box-shadow:0 30px 40px -24px #000000b3}.game-meta{flex-direction:column;margin-top:1.25rem;display:flex}.game-title{font-family:var(--font-head);letter-spacing:-.01em;font-size:1.3rem;font-weight:700}.game-sub{color:var(--ivory-muted);font-size:.95rem}.game-controls{align-items:center;gap:.4rem;margin-top:.85rem;display:flex}.game-status{color:var(--ivory-muted);white-space:nowrap;font-variant-numeric:lining-nums;margin-left:auto;font-size:.95rem}.movelist{background:var(--felt-deep);font-variant-numeric:lining-nums;border-radius:6px;flex-wrap:wrap;gap:.1rem .15rem;max-height:6.6rem;margin:.85rem 0 0;padding:.6rem .75rem;font-size:.98rem;line-height:1.5;list-style:none;display:flex;overflow-y:auto}.movelist li{white-space:nowrap;align-items:baseline;display:inline-flex}.movelist .move-no{color:var(--ivory-muted);padding:.05rem .1rem .05rem .45rem;font-weight:600}.movelist li:first-child .move-no{padding-left:.1rem}.movelist .move{appearance:none;font:inherit;color:var(--ivory);cursor:pointer;background:0 0;border:0;border-radius:4px;padding:.05rem .35rem}.movelist .move:hover{background:var(--felt-line)}.movelist .move.is-current{background:var(--wood);color:#2b1a08;font-weight:600}.game-note{color:var(--ivory-muted);margin-top:.75rem;font-size:.9rem}.game-note code{background:var(--felt-deep);color:var(--ivory)}.section{grid-template-columns:var(--rail) minmax(0, 1fr);gap:clamp(1.5rem,4vw,4rem);padding-block:clamp(3rem,7vw,5.5rem);scroll-margin-top:3.5rem;display:grid}.section+.section{border-top:1px solid var(--line)}.section-head{align-self:start;position:sticky;top:5rem}.section-lede{color:var(--ink-2);text-wrap:pretty;margin-top:.75rem;font-size:1rem;line-height:1.55}.section-body{grid-template-columns:minmax(0,1fr);align-content:start;gap:1.5rem;display:grid}.board-well{background:var(--paper-2);border-radius:6px;place-items:center;padding:clamp(1rem,3vw,2rem);display:grid}.board-well-flex{min-height:320px}.section chess-board{box-shadow:0 16px 24px -16px #14211a73}.callout{border-left:3px solid var(--wood);color:var(--ink-2);padding:.25rem 0 .25rem 1.1rem;font-size:1rem}.steps{counter-reset:step;gap:1.75rem;margin:0;padding:0;list-style:none;display:grid}.step{counter-increment:step;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);align-items:center;gap:1.5rem;display:grid}.step-text{padding-left:2.4rem;position:relative}.step-text:before{content:counter(step) ".";font-family:var(--font-head);color:var(--green);font-variant-numeric:lining-nums;font-size:1.5rem;font-weight:700;line-height:1;position:absolute;top:-.05em;left:0}.step-text p{color:var(--ink-2);margin-top:.3rem;font-size:.98rem;line-height:1.5}.playground{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);align-items:start;gap:1.5rem;display:grid}.playground-stage{grid-template-columns:minmax(0,1fr);gap:1rem;display:grid}.board-pg{font-size:40px}.playground-controls{gap:1.25rem;margin:0;display:grid}.control-group{border:0;border-top:1px solid var(--line);gap:.7rem;margin:0;padding:.9rem 0 0;display:grid}.control-group legend{float:left;width:100%;font-family:var(--font-head);margin-bottom:.9rem;padding:0;font-size:1.1rem;font-weight:600}.toggle{cursor:pointer;grid-template-columns:auto 1fr;align-items:center;gap:.8rem;display:grid}.toggle input{opacity:0;width:1px;height:1px;position:absolute}.toggle-track{background:var(--line-strong);border-radius:999px;width:2.5rem;height:1.45rem;transition:background .15s;position:relative}.toggle-track:after{content:"";background:var(--paper);border-radius:50%;width:calc(1.45rem - 6px);height:calc(1.45rem - 6px);transition:transform .15s;position:absolute;top:3px;left:3px}.toggle input:checked+.toggle-track{background:var(--green)}.toggle input:checked+.toggle-track:after{transform:translate(1.05rem)}.toggle input:focus-visible+.toggle-track{outline:2px solid var(--green);outline-offset:2px}.toggle-text{line-height:1.3;display:grid}.toggle-text code{justify-self:start}.toggle-text small{color:var(--muted);font-size:.85rem}.chips{flex-wrap:wrap;gap:.4rem;display:flex}.chip{border:1px solid var(--line-strong);color:var(--ink-2);font-family:var(--font-head);cursor:pointer;background:0 0;border-radius:999px;padding:.3rem .7rem;font-size:.88rem;font-weight:500}.chip:hover{border-color:var(--green);color:var(--green)}.chip[aria-pressed=true]{background:var(--green);border-color:var(--green);color:var(--green-ink)}.field{gap:.35rem;display:grid}.field-label{font-family:var(--font-head);color:var(--ink-2);justify-content:space-between;font-size:.9rem;font-weight:600;display:flex}.field-label output{color:var(--muted);font-variant-numeric:lining-nums;font-weight:500}.field textarea{font-family:var(--font-mono);border:1px solid var(--line-strong);background:var(--paper);color:var(--ink);resize:vertical;border-radius:6px;min-height:3.6rem;padding:.6rem .75rem;font-size:.85rem;line-height:1.5}.field textarea[aria-invalid=true]{border-color:var(--err)}.field-error{color:var(--err);background:var(--err-soft);border-radius:4px;padding:.4rem .6rem;font-size:.9rem}.field-hint{color:var(--muted);font-size:.9rem;line-height:1.5}.field-range input[type=range]{width:100%;accent-color:var(--green)}.api-demo{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:start;gap:1.5rem;display:grid}.api-stage{grid-template-columns:minmax(0,1fr);gap:1rem;display:grid;position:sticky;top:4.5rem}.board-api{font-size:clamp(26px,4.5vw,38px)}.console{background:var(--paper-2);border-radius:6px;overflow:hidden}.console-head{border-bottom:1px solid var(--line);font-family:var(--font-head);color:var(--ink-2);justify-content:space-between;align-items:center;padding:.4rem .5rem .4rem .9rem;font-size:.9rem;font-weight:600;display:flex}.console-log{min-height:7rem;max-height:14rem;font-family:var(--font-mono);align-content:start;gap:.2rem;margin:0;padding:.6rem .9rem;font-size:.8rem;line-height:1.6;list-style:none;display:grid;overflow-y:auto}.console-log:empty:before{content:"Nothing yet. Press a call on the right to run it here.";color:var(--muted);font-family:var(--font-body);font-size:.95rem}.console-log li{grid-template-columns:auto 1fr;gap:.6rem;display:grid}.console-log .log-prompt{color:var(--muted);-webkit-user-select:none;user-select:none}.console-log .log-code{color:var(--ink)}.console-log .log-result{color:var(--green)}.console-log .log-error{color:var(--err)}.console-log .log-result:before,.console-log .log-error:before{content:"→ ";color:var(--muted)}.api-calls{gap:0;display:grid}.api-group-title{margin:1.25rem 0 .4rem;font-size:1rem;font-weight:600}.api-group-title:first-child{margin-top:0}.api-call{text-align:left;border:0;border-top:1px solid var(--line);color:var(--ink);font:inherit;cursor:pointer;background:0 0;gap:.1rem;padding:.6rem .75rem .6rem 1.75rem;display:grid;position:relative}.api-call:last-child{border-bottom:1px solid var(--line)}.api-call:has(+.api-group-title){border-bottom:1px solid var(--line)}.api-call:before{content:"▶";color:var(--green);font-size:.65rem;position:absolute;top:.85rem;left:.4rem}.api-call:hover{background:var(--paper-2)}.api-call code{color:var(--ink);background:0 0;padding:0;font-size:.86rem;font-weight:600}.api-call span{color:var(--muted);font-size:.9rem;line-height:1.4}.api-call.is-flash{background:var(--paper-3)}.api-call.is-flash-error{background:var(--err-soft)}.reference{grid-template-columns:repeat(auto-fit,minmax(18rem,1fr));gap:1.5rem;margin-top:1rem;display:grid}.ref-table{border-collapse:collapse;width:100%;font-size:.95rem}.ref-table caption{text-align:left;font-family:var(--font-head);padding:0 0 .5rem;font-size:1.1rem;font-weight:600}.ref-table th,.ref-table td{text-align:left;border-top:1px solid var(--line);vertical-align:top;padding:.55rem .6rem .55rem 0;line-height:1.45}.ref-table thead th{font-family:var(--font-head);color:var(--ink-2);font-size:.9rem;font-weight:600}.ref-table tbody tr:last-child td{border-bottom:1px solid var(--line)}.ref-table td:first-child{white-space:nowrap}.sizing-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);align-items:start;gap:2rem;display:grid}.sizing-prose{grid-template-columns:minmax(0,1fr);gap:1rem;display:grid}.board-inline{font-size:14px}.section .board-inline{box-shadow:0 1px 2px #14211a59}.sizing-row{background:var(--paper-2);border-radius:6px;flex-wrap:wrap;justify-content:space-around;align-items:flex-end;gap:1.5rem;padding:clamp(1rem,3vw,2rem);display:flex}.size-sample{justify-items:center;gap:.6rem;margin:0;display:grid}.size-sample figcaption{color:var(--muted);font-size:.9rem}.footer{background:var(--felt);color:var(--ivory-muted);padding-block:2rem 2.5rem;font-size:.95rem}.footer a{color:var(--ivory)}.footer strong{color:var(--ivory);font-weight:600}.footer-inner{flex-wrap:wrap;justify-content:space-between;gap:1rem;display:flex}.footer .brand-mark{color:var(--ivory);margin-right:.3rem;font-size:1.1rem}.footer-links{gap:1.2rem;display:flex}@media (width<=1000px){.section{grid-template-columns:minmax(0,1fr);gap:1.5rem}.section-head{position:static}}@media (width<=860px){.hero-inner{grid-template-columns:minmax(0,1fr)}.hero-figure{max-width:27rem}.playground,.api-demo,.sizing-grid{grid-template-columns:minmax(0,1fr)}.api-stage{position:static}.step{grid-template-columns:minmax(0,1fr);gap:.75rem}}@media (width<=560px){.topnav{display:none}.board-well{padding:.75rem}.board-api{font-size:clamp(22px,8.5vw,38px)}.board-pg{font-size:min(40px,9vw)!important}}