:root{color-scheme:dark;--bg:#111b25;--surface:#1a2733;--wall:#34485c;--line:#2b3947;--text:#edf0e9;--muted:#95a4b2;--accent:#a9cfcc;--accent-rgb:169,207,204;--box:#a9cfcc;font-family:Inter,"SF Pro Display",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:16px}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button{border:0;background:none}button:disabled{opacity:.3;cursor:default}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:hover:not(:disabled){color:var(--accent)}[hidden]{display:none!important}.app{min-height:100svh;display:flex;flex-direction:column;max-width:1600px;margin:0 auto;padding:0 54px}.topbar{height:84px;display:flex;align-items:center;justify-content:space-between;position:relative;border-bottom:1px solid var(--line)}.wordmark{display:flex;gap:13px;align-items:center;text-decoration:none;color:var(--text);font-size:17px;font-weight:600;letter-spacing:.08em}.game-tabs{position:absolute;left:50%;transform:translateX(-50%);display:flex;gap:7px;background:#0d161f;padding:5px;border-radius:13px}.game-tab{display:flex;gap:10px;align-items:center;padding:12px 18px;color:var(--muted);font-size:15px;border-radius:9px;transition:background .22s,color .22s}.game-tab.active{background:#263641;color:var(--accent);box-shadow:0 2px 4px #0002}.tab-symbol{font-size:22px;line-height:20px;width:20px}.icon-button{border:1px solid #405060;width:34px;height:34px;border-radius:50%;font-size:18px;color:var(--muted)}main{flex:1;display:flex;align-items:stretch;justify-content:center;padding:20px 0 6px;min-height:0}.play-surface{width:min(100%,530px);display:flex;flex-direction:column;min-height:0}.level-heading{display:flex;align-items:center;justify-content:space-between;padding:0 14px}.overline{font-size:12px;letter-spacing:.15em;color:var(--accent);font-weight:500}.level-heading h1{font-size:24px;letter-spacing:.04em;font-weight:500;margin:10px 0 0}.moves{display:flex;align-items:baseline;gap:7px;color:var(--muted);font-size:12px}.moves>span:first-child{font:28px ui-monospace,SFMono-Regular,monospace;color:#c5d0d8;min-width:35px;text-align:right}.board-wrap{position:relative;width:100%;display:flex;align-items:center;justify-content:center;flex:1;min-height:150px}canvas{display:block;max-width:100%;touch-action:none;outline:none;border-radius:10px}canvas:focus-visible{outline:1px solid #a9cfcc44;outline-offset:3px}#goal-count{margin-left:auto;font-family:ui-monospace,monospace;font-size:12px;color:var(--accent);white-space:nowrap}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:4px;margin-top:12px;padding:0 10px}.tool-button{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:7px;color:#b2bdc6;font-size:14px;transition:background .15s}.tool-button:hover{background:#ffffff05}.tool-glyph{font-size:22px;line-height:20px}.slow-button[aria-pressed=true]{color:var(--accent);background:#ffffff08}.footer{min-height:64px;display:flex;justify-content:center;align-items:center;border-top:1px solid var(--line);gap:36px;color:var(--muted);font-size:12px}.level-selector{display:flex;align-items:center;gap:12px}.levels{display:flex;gap:8px}.level-dot{width:30px;height:30px;border-radius:7px;border:1px solid transparent;color:#90a1af;font:12px ui-monospace,monospace;position:relative;transition:all .2s}.level-dot.current{border-color:var(--accent);color:var(--accent);background:rgba(var(--accent-rgb),.06)}.level-dot.solved:after{content:"";position:absolute;bottom:2px;left:13px;width:3px;height:3px;border-radius:50%;background:var(--accent)}.arrow-button{font-size:23px;padding:2px 5px}.sound-button{display:flex;align-items:center;color:var(--muted);font-size:12px}.sound-button>span:first-child{font-size:22px}.sound-button[aria-pressed=true]{color:var(--accent)}.win-banner{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:12px;align-items:center;white-space:nowrap;border:1px solid rgba(var(--accent-rgb),.4);background:#182731f5;box-shadow:0 10px 35px #0004;border-radius:12px;padding:12px 14px;font-size:14px;animation:arrive .3s ease-out}.win-check{color:var(--accent);font-size:18px}.win-banner button{background:var(--accent);color:#142429;padding:9px 12px;border-radius:7px;font-size:13px;margin-left:10px}.win-banner button:hover{color:#142429!important;filter:brightness(1.06)}.touch-controls{display:none;text-align:center;gap:4px;margin-bottom:18px}.touch-controls button{width:44px;height:40px;background:#1c2a36;border:1px solid #354552;border-radius:8px;font-size:20px;margin:3px}.touch-controls button:active{background:#334958}.touch-controls>div{display:flex;justify-content:center;gap:5px}dialog{padding:34px;border:1px solid #3b4d5b;border-radius:18px;background:#182631;color:var(--text);width:min(calc(100vw - 32px),470px);box-shadow:0 20px 100px #0006}dialog::backdrop{background:#080f17b8;backdrop-filter:blur(7px)}.dialog-close{position:absolute;right:20px;top:20px;border:none;font-size:25px}dialog h2{font-size:27px;font-weight:500;margin:16px 0 24px}dialog p{font-size:15px;line-height:1.9;color:#b8c4ce}dialog strong{font-weight:500;color:var(--text)}.legend{display:flex;gap:25px;border-top:1px solid var(--line);padding-top:24px;margin:25px 0 30px;font-size:13px;color:var(--muted)}.legend>span{display:flex;align-items:center;gap:8px}.legend i{display:inline-block;width:17px;height:17px;border-radius:4px;background:var(--accent)}.legend .legend-player{background:#edf0e9}.legend .legend-goal{background:none;border:2px solid var(--accent);border-radius:4px}.primary-button{width:100%;display:flex;justify-content:space-between;background:var(--accent);color:#182631;padding:14px 18px;border-radius:8px;font-size:14px}.primary-button:hover{color:#182631!important;filter:brightness(1.07)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes arrive{from{opacity:0;translate:0 6px}to{opacity:1;translate:0 0}}@media(min-height:880px) and (min-width:800px){main{padding-top:34px;padding-bottom:16px}}@media(max-width:900px){.app{padding:0 28px}.game-tab{padding:12px 15px}.footer{gap:10px;height:auto}.levels{flex-wrap:wrap;justify-content:center}.wordmark{font-size:15px}.game-tabs{gap:0}}@media(max-width:650px){.app{padding:0 18px}.topbar{height:134px;align-items:flex-start;padding-top:20px}.wordmark{margin-top:3px}.wordmark svg{width:22px;height:22px}.game-tabs{top:71px;width:100%;justify-content:center;padding:3px}.game-tab{flex:1;justify-content:center;padding:10px 12px;font-size:14px}.tab-symbol{font-size:20px}.help-button{height:30px;width:30px;font-size:16px}main{padding-top:26px}.level-heading h1{font-size:22px}.overline{font-size:11px}.board-wrap{min-height:140px}.toolbar{margin-top:10px;gap:2px}.tool-button{padding:8px 9px}.footer{height:72px;gap:5px}.level-selector{gap:4px}.level-dot{width:27px;height:29px}.levels{gap:4px;flex-wrap:wrap;justify-content:center}.levels.many{gap:3px}.levels.many .level-dot{width:23px;height:26px;font-size:11px}.sound-button{font-size:16px}.win-banner{gap:6px;padding:8px 10px;font-size:12px;bottom:9px}.win-banner button{margin-left:3px;font-size:12px;padding:8px}.touch-controls{display:block}.moves>span:first-child{font-size:25px}dialog{padding:28px}.legend{gap:20px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}