body {
    margin: 0;
    overflow: hidden;
    font-family: Arial, sans-serif;
    background: #000;
    color: #fff;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
}

.overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
}

.overlay h1 {
    font-size: 4rem;
    letter-spacing: 8px;
    text-shadow: 0 0 30px #00ffcc, 0 0 60px #00ffcc;
}

.overlay p {
    opacity: 0.7;
    margin-top: 10px;
}

.enter-btn {
    display: inline-block;
    margin-top: 30px;
    padding: 14px 40px;
    border-radius: 40px;
    border: 1px solid #00ffcc;
    color: #00ffcc;
    text-decoration: none;
    transition: 0.3s;
}

.enter-btn:hover {
    background: #00ffcc;
    color: #000;
}