html,
body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: #2b1b52;
    color: white;
    font-family: 'Arial', sans-serif;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    cursor: crosshair;
    touch-action: none;
}