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

body {
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

#gameCanvas {
    display: block;
    max-width: 100vw;
    max-height: 100vh;
    image-rendering: auto;
}