/* Loop tilings. By Luke Steuber. */
:root{color-scheme:light;--bg:#f6f5f1;--paper:#fffefa;--ink:#222b2c;--muted:#586667;--line:#ced4d1;--accent:#775518;--ground:#fffefa;--play:#141a1b;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#14191a;--paper:#1c2324;--ink:#edf0e9;--muted:#a5b3b1;--line:#3b4948;--accent:#eed296;--ground:#090c0d;--play:#f3f5f0}}
:root[data-theme=dark]{color-scheme:dark;--bg:#14191a;--paper:#1c2324;--ink:#edf0e9;--muted:#a5b3b1;--line:#3b4948;--accent:#eed296;--ground:#090c0d;--play:#f3f5f0}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.55;-webkit-text-size-adjust:100%}
button,select{font:inherit;color:inherit}
button{cursor:pointer;min-height:44px;border:1px solid var(--line);border-radius:9px;padding:8px 14px;background:transparent}
button:hover{border-color:var(--muted)}
select{min-height:44px;padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3,p{margin:0}
.top,main,footer{width:min(1320px,calc(100% - 48px));margin:auto}
.top{display:flex;justify-content:space-between;align-items:end;gap:24px;padding:28px 0 20px;border-bottom:1px solid var(--line)}
h1{font-size:24px;font-weight:650;letter-spacing:-.4px}
.lede{color:var(--muted);margin-top:8px;max-width:68ch}
.tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--muted)}
.tools label{display:flex;gap:8px;align-items:center}
.tools .check{min-height:44px}.tools input[type=checkbox]{width:20px;height:20px;accent-color:var(--accent);margin:0}
.tools select,.tools button{color:var(--ink)}
.ranking{padding:24px 0 8px}
.ranking h2,.tiling h2{font-size:20px;font-weight:600;letter-spacing:-.3px}
table{width:100%;border-collapse:collapse;font-size:14px;margin-top:12px}
th{text-align:left;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:650;padding:0 12px 6px 0;border-bottom:1px solid var(--ink)}
td{padding:8px 12px 8px 0;border-bottom:1px solid var(--line);vertical-align:baseline}
th.num,td.num{text-align:right}td.num{white-space:nowrap}
td.num:first-child{color:var(--accent);font-weight:650;width:2em}
td a{color:inherit;text-decoration-color:var(--line);text-underline-offset:3px}
tr.reference td{color:var(--muted)}
td .sym{color:var(--muted);font-size:13px;margin-left:6px}
.note{color:var(--muted);font-size:14px;margin-top:12px;max-width:90ch}
.tiling{padding:28px 0;border-top:1px solid var(--line);margin-top:20px}
.tiling h2 .rank{color:var(--accent);margin-right:10px;font-variant-numeric:tabular-nums}
.tiling h2 .sym{color:var(--muted);font-weight:400;font-size:15px;margin-left:8px}
.verdict{margin-top:6px;max-width:90ch}
.facts{display:flex;flex-wrap:wrap;gap:6px 24px;margin:12px 0 0;font-size:14px}
.facts div{display:flex;gap:8px}
.facts dt{color:var(--muted)}
.facts dd{margin:0;font-variant-numeric:tabular-nums}
.panels{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:18px}
figure{margin:0;min-width:0}
.frame{position:relative;aspect-ratio:1/1;background:var(--ground);border:1px solid var(--line);overflow:hidden}
.frame canvas,.frame svg{position:absolute;inset:0;width:100%;height:100%;display:block}
.frame canvas{pointer-events:none}
.frame .glow{opacity:.9;filter:blur(var(--glow,3px))}
.frame[data-night=false] .glow{opacity:.18;filter:brightness(0) blur(var(--shadow,1px));transform:translateY(var(--drop,.5px))}
figcaption{display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:44px;font-size:13px;color:var(--muted)}
figcaption b{font-weight:600;color:var(--ink)}
figcaption button{font-size:13px;padding:4px 10px;min-height:36px}
figcaption .full{color:var(--ink);text-underline-offset:3px;min-height:44px;display:inline-flex;align-items:center;padding:0 4px}
figcaption .readout{font-variant-numeric:tabular-nums;margin-left:auto}
.ib{width:44px;min-width:44px;padding:0;display:inline-grid;place-items:center;border-color:transparent}
.ib svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.board{touch-action:manipulation;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;outline:none;cursor:pointer}
.board[data-locked=true]{cursor:default}
.board .hit{fill:transparent;stroke:none}
.board .outlines polygon{fill:none;stroke:var(--line);stroke-width:1;vector-effect:non-scaling-stroke;pointer-events:none}
.board .ink path{fill:none;stroke:var(--play);stroke-width:var(--lw);stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.board .ends circle{fill:var(--play);pointer-events:none}
.board .ring{fill:none;stroke:var(--play);stroke-width:1;vector-effect:non-scaling-stroke;pointer-events:none}
.board .ring.focus{stroke-width:2}
.board .sheen path{fill:none;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.board .sheen .core{stroke:var(--ground);opacity:.92}
.board .sheen .halo{stroke:var(--play);opacity:.5}
.contrast{display:grid;place-items:center}
.contrast svg{position:absolute;inset:0}
.contrast .shape{fill:none;stroke:var(--play);stroke-width:1.5;vector-effect:non-scaling-stroke}
.contrast .turned{fill:none;stroke:var(--play);stroke-width:1;stroke-dasharray:5 5;vector-effect:non-scaling-stroke}
.contrast .pivot{fill:var(--play)}
footer{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);margin-top:24px;padding:20px 0 32px;color:var(--muted);font-size:13px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
@media(max-width:860px){.panels{grid-template-columns:minmax(0,1fr)}.top{flex-direction:column;align-items:start}}
@media(max-width:720px){.top,main,footer{width:calc(100% - 32px)}h1{font-size:21px}.lede{font-size:15px}.tiling{padding:22px 0}table{font-size:13px}td .sym{display:block;margin:0}th,td{padding-right:8px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
@media(forced-colors:active){:root{--ground:Canvas;--play:CanvasText;--line:GrayText}}