/* ============================================================
   AS Apps Developer Portal — Footer
   ============================================================
   Multi-column footer with social placeholders.
   Responsive collapse on mobile.
   ============================================================ */

.footer {
  position: relative;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  overflow: hidden;
}

/* ── Decorative gradient line at top ── */
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-border);
  opacity: 0.5;
}

/* ── Main Footer Content ── */
.footer__main {
  padding: var(--space-16) 0 var(--space-10);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-10);
}

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 640px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ── Brand Column ── */
.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__brand-description {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  max-width: 320px;
}

/* ── Social Links ── */
.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    transform var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-primary-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  transform: translateY(-2px);
}

.footer__social-link svg {
  width: 16px;
  height: 16px;
}

/* ── Link Columns ── */
.footer__column {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__column-title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__link:hover {
  color: var(--color-primary-light);
}

/* ── Footer Bottom ── */
.footer__bottom {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
}

.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

.footer__legal-link {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.footer__legal-link:hover {
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
}