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

html, body {
    width: 100%;
    height: 100%;
    background: #000;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

canvas {
    display: block;
    max-width: 100vw;
    max-height: 100vh;
    aspect-ratio: 7 / 9;
    background: #000;
}