* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background: #0a0a0a;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    font-family: 'Courier New', monospace;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

canvas { display: block; touch-action: none; }