body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
#play-btn {
    background: linear-gradient(90deg, #ffb347 0%, #ff9447 100%);
    color: #fff;
    border: none;
    border-radius: 16px;
    padding: 32px 80px;
    font-size: 2.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.12s, box-shadow 0.12s, background 0.18s;
    box-shadow: 0 2px 12px rgba(0,0,0,0.10);
    outline: none;
}
#play-btn:active {
    transform: scale(0.96) rotate(-3deg);
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
    background: linear-gradient(90deg, #ff9447 0%, #ffb347 100%);
}