:root{color-scheme:light;--night:#182a2b;--ink:#223638;--muted:#597174;--paper:#fff9df;--amber:#ffbd70;--mint:#d7ede6;--line:#b6c9c1;--error:#933520;font-family:Avenir,"Segoe UI",Arial,sans-serif;color:#f8f5df;background:var(--night);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:inherit;text-underline-offset:4px}button{min-height:44px;border:1px solid transparent;border-radius:7px;padding:10px 16px;transition:background .14s,transform .14s,box-shadow .14s}button:not(:disabled):active{transform:translateY(1px)}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #e79036;outline-offset:4px}[hidden]{display:none!important}.skip{position:fixed;z-index:9;left:16px;top:-80px;background:var(--paper);color:var(--ink);padding:12px}.skip:focus{top:12px}
.masthead,main,footer{width:min(1120px,calc(100% - 64px));margin-inline:auto}.masthead{display:flex;justify-content:space-between;align-items:center;min-height:92px;gap:20px}.masthead>a:last-child{font-size:15px;min-height:44px;display:inline-flex;align-items:center}.brand{display:flex;gap:12px;align-items:center;font-size:25px;font-weight:750;letter-spacing:-.7px;text-decoration:none}.brand svg{width:36px;height:36px;stroke:var(--amber);stroke-width:5;fill:none;stroke-linecap:round}.brand .weave{stroke:#e6f6e5;stroke-width:6}.heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:32px 0 34px}.heading h1{font-size:clamp(32px,4vw,49px);line-height:1.1;letter-spacing:-1.8px;font-weight:620;margin:0}.heading p{font-size:18px;line-height:1.5;max-width:270px;margin:0 0 5px;color:#c2d5cc}.game{border-top:1px solid #526966}.toolbar{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:20px 0}.mode{display:flex;gap:4px;border:1px solid #58706c;border-radius:9px;padding:3px}.mode button{background:transparent;color:inherit;min-width:94px}.mode button[aria-pressed=true]{background:var(--amber);color:var(--night);font-weight:650}.level-label{display:flex;align-items:center;gap:10px;font-size:14px;color:#d1dfd7}.level-label select{min-height:44px;max-width:100%;background:#243b3c;color:#fff5df;border:1px solid #58706c;border-radius:7px;padding:0 33px 0 11px}.outline{background:transparent;color:#fff5df;border-color:#58706c;margin-left:auto}.play-area{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:40px;align-items:start}.puzzle-paper{position:relative;background:var(--paper);color:var(--ink);padding:24px 34px 20px;box-shadow:0 14px 32px #0002;border-radius:3px 3px 36px 3px}.paper-caption{display:flex;justify-content:space-between;gap:12px;font-size:13px;font-weight:600;color:var(--muted);padding-bottom:24px}.board{display:grid;grid-template-columns:minmax(44px,1fr) 28px minmax(44px,1fr) 28px minmax(44px,1fr);grid-template-rows:auto 27px auto 27px auto;gap:7px;max-width:450px;margin:auto}.cell{position:relative;aspect-ratio:1;padding:0;min-width:0;min-height:44px;background:#f3e9c5;border:2px solid #d2caa8;box-shadow:inset 0 -3px 0 #ccbe902b;border-radius:8px;color:var(--ink);font-size:clamp(25px,3.3vw,43px);font-variant-numeric:tabular-nums;font-weight:650;line-height:1}.cell.given{background:#dce3d4;border-color:#c7d0bc;color:#445c53}.cell.related:not(.given){background:#fbebb9}.cell.selected{background:var(--mint)!important;border-color:#24594d;box-shadow:0 0 0 3px #24594d33}.cell.conflict{border-color:var(--error);color:var(--error)}.cell.hinted{animation:reveal .45s ease}.given-dot{display:none;position:absolute;top:9px;right:9px;width:5px;height:5px;background:currentColor;border-radius:50%;opacity:.6}.given .given-dot{display:block}.error-mark{display:none;position:absolute;top:4px;right:6px;font-size:14px;font-weight:800}.conflict .error-mark{display:block}.sign{display:grid;place-items:center;color:#7c806d;font-size:26px;line-height:1;user-select:none}.equation-count{margin:24px 0 0;font-size:14px;color:var(--muted)}.conflicts{color:var(--error);margin:12px 0 0;font-size:14px;line-height:1.5}.workbench{padding-top:4px;min-width:0}.tray-heading h2{font-size:20px;margin:0 0 7px;font-weight:620}.tray-heading p{font-size:14px;margin:0 0 22px;color:#c2d5cc}.tray{display:grid;grid-template-columns:repeat(4,minmax(44px,1fr));gap:10px}.tile{background:var(--amber);color:#34362d;font-size:29px;font-weight:650;min-height:68px;position:relative;padding:10px 8px;box-shadow:0 4px 0 #82512b}.tile:hover:not(:disabled){background:#ffce93}.tile:disabled{background:#37504e;color:#9aada6;box-shadow:none;opacity:1}.tile-count{display:block;font-size:12px;font-weight:600;margin-top:3px}.type-entry{margin-top:27px}.type-entry>label{display:block;font-size:13px;color:#c2d5cc;margin-bottom:8px}.type-row{display:flex;gap:8px}.type-row input{width:90px;min-width:0;min-height:44px;color:#fff5df;background:#243b3c;border:1px solid #678078;border-radius:6px;padding:8px 12px;font-size:20px}.type-row button{background:#d7ede6;color:var(--night)}.actions{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin-top:23px}.actions button{font-size:14px;padding:10px 5px;background:transparent;color:#f8f5df;border-color:#617670}.feedback{min-height:49px;font-size:14px;line-height:1.55;color:#d9e6dd;margin:19px 0 0}.finish{border-top:1px solid #698078;padding-top:18px;margin-top:8px}.finish h2{font-size:22px;margin:0 0 8px;color:var(--amber)}.finish p{font-size:14px;line-height:1.5}.finish button{background:var(--amber);color:var(--night)}.notice{padding:15px 18px;margin:0 0 20px;border:1px solid #809083;border-radius:7px;background:#233f3a;color:#f6f6df;line-height:1.5}.notice p{margin:0 0 12px}.notice button{background:#e5d4a8;color:var(--night)}.notice details{margin-top:12px;font-size:12px}.notice pre{white-space:pre-wrap;overflow-wrap:anywhere}.warning{border-color:#ffbd70}.short-guide{display:grid;grid-template-columns:1fr 1.3fr;column-gap:55px;margin:60px 0 30px;border-top:1px solid #526966;padding-top:25px}.short-guide h2{font-size:26px;line-height:1.2;font-weight:600;margin:0;max-width:240px}.short-guide p{color:#c2d5cc;line-height:1.6;font-size:15px;margin:0}.short-guide a{grid-column:2;margin-top:16px;color:var(--amber)}.library-note{font-size:12px;line-height:1.6;max-width:760px;color:#adccc0;margin:36px 0}footer{display:flex;justify-content:space-between;gap:25px;color:#adccc0;border-top:1px solid #526966;padding:25px 0 35px;font-size:13px}footer nav{display:flex;gap:24px}footer a{display:inline-flex;align-items:center;min-height:44px}footer>span{padding-top:15px}dialog{max-width:min(460px,calc(100% - 32px));padding:28px;background:var(--paper);color:var(--ink);border:0;border-radius:12px;box-shadow:0 18px 80px #0005}dialog::backdrop{background:#0b1c1cd9}dialog h2{font-size:24px;margin:0 0 14px}dialog p{line-height:1.6;font-size:15px}.dialog-actions{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap;margin-top:24px}.dialog-actions button:first-child{border-color:#8e9c87;background:transparent}.dialog-actions button:last-child{background:#28554e;color:#fff}
.rules{max-width:800px;margin:40px auto 70px}.rules h1{font-size:clamp(32px,5vw,48px);letter-spacing:-1.3px;line-height:1.1;font-weight:600;margin:0 0 24px}.rules h2{font-size:25px;font-weight:600;margin:40px 0 14px;color:var(--amber)}.rules p,.rules li{font-size:17px;line-height:1.7;color:#d2e0d6}.rules li+li{margin-top:10px}.rules ul,.rules ol{padding-left:24px}.example{background:var(--paper);color:var(--ink);padding:26px;border-radius:8px;max-width:420px;font-variant-numeric:tabular-nums}.example .math{font-size:29px;color:var(--ink);margin:0 0 10px;font-weight:600}.example .math:last-child{margin-bottom:0}.play-link{display:inline-flex;background:var(--amber);color:var(--night);padding:13px 20px;text-decoration:none;border-radius:7px;min-height:48px;font-weight:600}.key{display:inline-block;border:1px solid #688475;border-radius:3px;font-size:14px;padding:0 6px}.rules table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.6}.rules th,.rules td{text-align:left;padding:12px 10px;border-bottom:1px solid #526966}.rules th{color:var(--amber)}
@keyframes reveal{from{box-shadow:0 0 0 7px #edaf4270}to{box-shadow:0 0 0 0 #edaf4200}}
@media(max-width:760px){.masthead,main,footer{width:calc(100% - 36px)}.masthead{min-height:77px}.heading{display:block;margin:23px 0 26px}.heading h1{font-size:36px;letter-spacing:-1.3px}.heading h1 br{display:none}.heading p{max-width:none;font-size:16px;margin-top:16px}.play-area{grid-template-columns:1fr;gap:26px}.puzzle-paper{padding:20px 24px}.board{max-width:375px}.cell{font-size:34px}.toolbar{gap:12px}.level-label{margin-left:auto}.outline{margin-left:0}.workbench{max-width:480px;width:100%;margin:auto}.tray{grid-template-columns:repeat(4,minmax(44px,1fr))}.tile{min-height:63px}.tray-heading p{margin-bottom:15px}.short-guide{grid-template-columns:1fr;gap:16px;margin-top:42px}.short-guide h2{max-width:none}.short-guide a{grid-column:1;margin-top:0}.rules{margin-top:22px}.rules p,.rules li{font-size:16px}}
@media(max-width:400px){.masthead,main,footer{width:calc(100% - 28px)}.brand{font-size:23px;gap:8px}.brand svg{width:31px;height:31px}.masthead>a:last-child{font-size:14px}.heading h1{font-size:31px}.toolbar{align-items:stretch}.level-label{width:100%;justify-content:space-between;margin-left:0}.level-label select{flex:1;margin-left:12px}.puzzle-paper{padding:19px 14px 18px;border-bottom-right-radius:25px}.paper-caption{font-size:12px;gap:8px;padding-bottom:20px}.board{grid-template-columns:minmax(44px,1fr) 20px minmax(44px,1fr) 20px minmax(44px,1fr);grid-template-rows:auto 24px auto 24px auto;gap:4px}.cell{font-size:30px}.sign{font-size:22px}.actions{gap:6px}.actions button{font-size:13px;padding:10px 3px}.tray{gap:9px}.short-guide{margin-top:30px}footer{gap:14px}footer nav{gap:16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}