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

body {
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Courier New', monospace;
}

.game-container {
    border: 4px solid #33ff33;
    box-shadow: 0 0 20px #33ff33;
}

canvas {
    display: block;
    background-color: #000;
}