/* ══════════════════════════════════════════════
   Footer
   ══════════════════════════════════════════════ */

.footer {
    background: var(--footer-bg);
    border-top: 1px solid var(--glass-border);
    padding: 64px 0 24px;
    /* Footer always dark — override text colors for light theme */
    --text-heading: #ffffff;
    --text-muted: #aaa;
    --text: #ccc;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 20px;
}

.footer-col p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-col ul a:hover {
    color: var(--primary);
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-social a:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(0, 180, 216, 0.1);
}

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Scroll to Top ── */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 900;
    box-shadow: 0 4px 16px rgba(0, 180, 216, 0.3);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}