body {
    margin: 0;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    font-family: 'Segoe UI', Arial, sans-serif;
}
canvas {
    border: 3px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    box-shadow: 0 0 60px rgba(99,102,241,0.3), 0 0 120px rgba(99,102,241,0.1);
}