/* Back to Top Button */
.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.back-to-top.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.back-to-top.hide {
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
}

.back-to-top:focus {
    outline: 3px solid rgba(37, 99, 235, 0.3);
}