html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    /* Dark background matching Material 3 dark theme surface color */
    background-color: #1C1B1F;
}

/* Canvas fills entire viewport */
canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}