.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-blue);
    color: var(--neutral-white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow);
}

.back-to-top:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
}

.back-to-top.visible {
    opacity: 1;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 15px;
        right: 15px;
    }
}