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

body {
    background: #0a0a1a;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

#gameCanvas {
    background: #111;
    display: block;
    border: 2px solid #444;
    box-shadow: 0 0 30px #0ff4, 0 0 60px #0ff1;
    max-width: 100vw;
    max-height: 100vh;
    object-fit: contain;
}