#cart_button {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#cart_button.cart-hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

#cart_button.cart-visible {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}