body {
    margin: 0;
    overflow: hidden;
    background-color: #000;
}

#scene-container {
    position: absolute;
    width: 100%;
    height: 100%;
}

#enter-btn {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px 30px;
    font-size: 18px;
    color: white;
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid white;
    border-radius: 5px;
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s ease;
}

#enter-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}