body {
    margin: 0;
    padding: 0;
    background-color: #000;
    overflow: hidden;
    display: flex;
    justify-content: center;
    font-family: Arial, sans-serif;
    user-select: none;
    -webkit-user-select: none;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
}

#roll-btn {
    position: absolute;
    bottom: 50px;
    padding: 15px 40px;
    background: linear-gradient(45deg, #ff0055, #8800ff);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(255, 0, 85, 0.4);
    z-index: 100;
    transition: all 0.2s ease;
}

#roll-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(255, 0, 85, 0.7);
}

#roll-btn:active {
    transform: scale(0.95);
}

#roll-btn:disabled {
    opacity: 0.5;
    filter: grayscale(1);
    cursor: not-allowed;
}