.scroll-up-button {
    position: fixed;
    bottom: 2rem;
    right: 1rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--bg-lime);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(1rem);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 1000;
    color: #fff;
 

}

.scroll-up-button.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-up-button:hover {
    transform: translateY(-0.2rem);
    background: var(--paper);
    color: var(--bg-lime);
}

@media (max-width: 768px) {
    .scroll-up-button {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 2.5rem;
        height: 2.5rem;
        opacity: 0.7;
    }
    .scroll-up-button.visible {
        opacity: 0.7;
    }
}