body {
    margin: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.87);
    background-color: #000000;
}

#app {
    position: fixed;
    inset: 0;
    width: 100%;
    /*height: 100vh;*/
    height: 100dvh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#app canvas {
    display: block;
    outline: none;
    border: none;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    touch-action: none;
    image-rendering: auto;           /* smooth text/graphics */
    /* If you want pixel-art look, replace with: image-rendering: pixelated; */
    max-width: 100%;
    max-height: 100%;
}