*{box-sizing:border-box;margin:0;padding:0}body{margin:0;overflow:hidden}.app{background:#e8e4e0;flex-direction:column;justify-content:center;align-items:center;gap:16px;min-height:100svh;display:flex}canvas{cursor:crosshair;touch-action:none;border:1px solid #999;max-width:100%;height:auto;box-shadow:0 2px 12px #00000026}.toolbar{align-items:center;gap:12px;display:flex}.toolbar button{cursor:pointer;background:#fff;border:1px solid #999;border-radius:4px;padding:6px 16px;font-family:system-ui,sans-serif;font-size:14px}.toolbar button:hover{background:#f0f0f0}.toolbar label{color:#333;align-items:center;gap:6px;font-family:system-ui,sans-serif;font-size:14px;display:flex}.toolbar input[type=range]{width:100px}