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

body {
    margin: 0;
    overflow: hidden;
    background-color: #000;
    font-family: 'Courier New', monospace;
    cursor: none;
}

#gameCanvas {
    display: block;
    background: radial-gradient(ellipse at center, #0a0e27 0%, #000000 100%);
}