body {
    margin: 0;
}

#game {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at 20% 15%, #263748, #0d141f 60%);
    padding: 8px;
    box-sizing: border-box;
}

#canvas {
    border: 3px solid rgba(255, 255, 255, 0.35);
    border-radius: 12px;
    background: #16202c;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.45);
}