:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#183e32;background:#f6f4ec;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;font-weight:650;min-height:44px;border:1px solid #cbd5c8;border-radius:12px;background:#fffef8;color:#214d3d;padding:10px 14px;cursor:pointer;touch-action:manipulation}button:hover{background:#eaf0e5}button:focus-visible,a:focus-visible{outline:3px solid #b77a25;outline-offset:3px}button:disabled{opacity:.45;cursor:default}[hidden]{display:none!important}.shell{max-width:620px;margin:auto;padding:20px 16px 32px}header{display:flex;justify-content:space-between;align-items:center;gap:10px}.brand{color:#183e32;font-size:24px;font-weight:800;text-decoration:none}.tag,.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:750;color:#66765e}.intro{text-align:center;padding:30px 0 20px}.intro h1{font-family:Georgia,serif;font-size:42px;font-weight:500;margin:8px 0}.intro p{margin:0;color:#68705f}.panel{background:#fffef8;border:1px solid #dce1d3;border-radius:22px;padding:24px;margin:12px 0;text-align:center;box-shadow:0 8px 30px #183e3206}.panel h2{font-family:Georgia,serif;font-size:25px;font-weight:500}.panel p{line-height:1.6}.panel button{margin:4px}.hero{font-family:monospace;white-space:pre;line-height:1;font-size:45px;letter-spacing:4px;color:#56836b;background:#edf2e6;width:180px;padding:20px 0;border-radius:24px;margin:auto}.primary{background:#244f3e;color:white;border-color:#244f3e}.primary:hover{background:#173e2e}.muted{font-size:12px;color:#68725f;line-height:1.5}.play-top,.stats,.toolbar,.pager,.section-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.play-top{font-size:13px}.play-top button{padding:9px 11px}.stats{font-size:12px;color:#66765e;margin:18px 3px 10px}.board{display:grid;gap:3px;border:6px solid #dce5d7;border-radius:16px;padding:4px;background:#dce5d7;max-width:540px;margin:auto;aspect-ratio:1}.tile{position:relative;aspect-ratio:1;padding:0;min-height:0;min-width:0;border:0;border-radius:6px;background:#fffef8;overflow:hidden}.tile svg{display:block;width:100%;height:100%;stroke:#a1ada0;fill:#a1ada0;stroke-width:9;stroke-linecap:round}.tile.live svg{stroke:#38735b;fill:#38735b}.tile.source svg circle{fill:#c68a39;stroke:#fff3cb;stroke-width:3}.tile.locked{box-shadow:inset 0 0 0 2px #aa7a30}.tile .lock-mark{position:absolute;right:3px;bottom:1px;font-size:10px;color:#805915;font-weight:bold}.hint{text-align:center;font-size:13px;min-height:20px;color:#5b6b59}.toolbar button{flex:1;padding:10px 6px;font-size:13px}.toolbar [aria-pressed=true],.sizes [aria-pressed=true]{background:#e5ecd9;border-color:#71936a}.success{background:#edf3e4}.levels{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:16px 0}.levels button{margin:0;font-size:13px;padding:9px 4px}.levels .done{background:#e4eedc}.pager{font-size:12px}.pager button{font-size:12px}.section-head h2{margin:0}ol{text-align:left;padding-left:22px;line-height:1.7}li{margin:10px 0}footer{text-align:center;color:#7b8171;font-size:11px;line-height:1.6;margin-top:28px}footer a{color:inherit}.error{padding:20px;text-align:center;background:#fff0de;border-radius:15px}@media(max-width:360px){.shell{padding:14px 10px}.tag{font-size:8px;letter-spacing:.8px}.intro{padding:22px 0 15px}.intro h1{font-size:36px}.panel{padding:18px}.board{gap:2px;border-width:4px;padding:2px}.play-top{font-size:12px}}@media(prefers-reduced-motion:no-preference){button{transition:background .15s}}

.tile:disabled{opacity:1;cursor:default}

/* Scale navigation stays touchable on narrow screens. */
.pager{flex-wrap:wrap;justify-content:center}.pager button{min-width:54px;min-height:44px}.pager #page-number{min-width:48px;text-align:center}