/* Back to Top Floating Button */

.back-to-top {
    position: fixed;
    bottom: 5rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    z-index: 900;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.back-to-top:active {
    transform: translateY(-2px);
}

/* Dark mode */
[data-theme="dark"] .back-to-top {
    background: linear-gradient(135deg, #5dade2, #3b7ec4);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .back-to-top {
        width: 50px;
        height: 50px;
        bottom: 4rem;
        right: 1.5rem;
        font-size: 1.25rem;
    }
}