:root{--bg-0: #1b1d21;--bg-1: #232529;--bg-2: #2b2e33;--bg-3: #34383e;--border: #3d4148;--text: #d8dade;--text-dim: #8b8f97;--accent: #4f9dff;--accent-dim: #2b5e9e;--danger: #e5534b;font-size:13px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg-0);color:var(--text);user-select:none;-webkit-user-select:none}button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}input,select{font:inherit;color:var(--text);background:var(--bg-2);border:1px solid var(--border);border-radius:3px;padding:2px 6px}input[type=checkbox],input[type=radio]{accent-color:var(--accent)}input[type=range]{accent-color:var(--accent);padding:0;background:none;border:none}input[type=color]{padding:0;width:28px;height:20px}input[type=number]{width:60px}.app{height:100%;display:flex;flex-direction:column}.menubar{display:flex;align-items:center;gap:2px;padding:0 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10px;font-size:15px;color:var(--text-dim)}.tab-new:hover{color:var(--text)}.viewport{flex:1;position:relative;overflow:hidden;background:var(--bg-0);min-height:0;outline:none}.canvas-frame{position:absolute}.checker{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(45deg,#333 25%,transparent 25%,transparent 75%,#333 75%),linear-gradient(45deg,#333 25%,transparent 25%,transparent 75%,#333 75%);background-color:#444;background-size:16px 16px;background-position:0 0,8px 8px}.pix{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;image-rendering:pixelated}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.empty-hint{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--text-dim)}.dock{width:300px;flex:none;background:var(--bg-1);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.panel{border-bottom:1px solid 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