*{margin:0;padding:0;box-sizing:border-box}body{background:#111;color:#eee;font-family:system-ui,-apple-system,sans-serif;display:flex;flex-direction:column;align-items:center;height:100vh;overflow:hidden;-webkit-user-select:none;user-select:none}#toolbar{display:flex;align-items:center;gap:16px;padding:10px 16px;background:#1a1a2e;width:100%;flex-shrink:0}#particle-buttons{display:flex;gap:6px;flex-wrap:wrap}#particle-buttons button{display:flex;align-items:center;gap:6px;padding:6px 12px;border:2px solid transparent;border-radius:6px;background:#2a2a3e;color:#ddd;font-size:13px;cursor:pointer;transition:border-color .15s,background .15s}#particle-buttons button:hover{background:#3a3a4e}#particle-buttons button.active{border-color:#fff;background:#3a3a5e}.color-swatch{width:14px;height:14px;border-radius:3px;flex-shrink:0}#controls{display:flex;align-items:center;gap:12px;margin-left:auto;font-size:13px}#controls label{display:flex;align-items:center;gap:6px}#brush-size{width:80px;accent-color:#6a6aff}#share-btn,#clear-btn{padding:6px 14px;border:1px solid #555;border-radius:6px;background:#2a2a3e;color:#ddd;font-size:13px;cursor:pointer}#share-btn:hover{background:#2a3a4e;border-color:#5a8}#clear-btn:hover{background:#4a2a2e;border-color:#a55}#game-canvas{flex:1;max-width:100%;object-fit:contain;cursor:crosshair;image-rendering:pixelated}#fps-counter,#cell-info{position:fixed;right:10px;font-size:12px;font-family:monospace;color:#888;pointer-events:none}#fps-counter{top:50px}#cell-info{top:66px}