body {
    background: linear-gradient(45deg, #ff6347, #ff8c00, #ffd700, #32cd32);
    background-size: 400% 400%;
    animation: gradientAnimation 10s ease infinite;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    position: relative;
}

* {
    user-select: none;
}

@keyframes gradientAnimation {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.button {
    background-color: #ff6347;
    border: none;
    padding: 20px;
    border-radius: 10px;
    font-size: 2rem;
    color: white;
    cursor: pointer;
    position: absolute;
}

.score {
    position: absolute;
    top: 20px;
    font-size: 2rem;
    color: white;
}

.back-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s ease;
}

.back-btn:hover {
    background-color: rgba(0, 0, 0, 0.8);
}