/* ============================================
   BACK TO TOP BUTTON — Purple Accent
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    background: var(--accent-purple);
    color: white;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 20px var(--accent-purple-glow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 99;
    font-size: 1rem;
}

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

.back-to-top:hover {
    background: var(--accent-purple-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--accent-purple-glow);
}

.back-to-top:focus-visible {
    outline: 2px solid var(--accent-purple-light);
    outline-offset: 2px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 576px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }
}