body {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    text-align: center;
    margin: 0;
    padding: 16px;
}

canvas {
    border: 2px solid black;
    cursor: crosshair;
    max-width: 100%;
    height: auto;
    touch-action: none;
}

input[type="range"] {
    vertical-align: middle;
}