body {
    margin: 0;
    background: linear-gradient(135deg, #0c1445, #1a237e, #0c1445);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    font-family: 'Segoe UI', Arial, sans-serif;
}
canvas {
    border: 3px solid rgba(56, 189, 248, 0.25);
    border-radius: 16px;
    box-shadow: 0 0 60px rgba(56, 189, 248, 0.2);
}