/* back-to-top.css – styles for the Back to Top button */
#backToTop {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 3rem;
    height: 3rem;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    display: none;
    /* shown via JS when scrolling */
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: background 0.3s, transform 0.3s;
}

#backToTop:hover {
    background: #e05555;
    transform: translateY(-2px);
}