/* ============================================================
   SmartOBJX Footer
   Dark footer with 4-column layout + bottom bar.
   ============================================================ */

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding-top: var(--space-16);
}

/* ---- Footer Grid ---- */
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-8);
}

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

.footer-brand .nav-brand,
.footer-brand .nav-logo {
  color: var(--color-footer-text);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-footer-muted);
  line-height: 1.5;
}

/* ---- Link Columns ---- */
.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-footer-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-footer-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.footer-links a:hover {
  color: var(--color-footer-text);
  text-decoration: none;
}

.footer-links a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---- Social Icons ---- */
.social-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-footer-muted);
  transition:
    color var(--duration-fast) var(--ease-default),
    background-color var(--duration-fast) var(--ease-default);
}

.social-link:hover {
  color: var(--color-footer-text);
  background-color: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.social-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.social-link svg {
  width: 20px;
  height: 20px;
}

/* ---- Bottom Bar ---- */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding: var(--space-6) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--text-xs);
  color: var(--color-footer-muted);
}

.footer-legal {
  display: flex;
  gap: var(--space-4);
}

.footer-legal a {
  color: var(--color-footer-muted);
  text-decoration: none;
}

.footer-legal a:hover {
  color: var(--color-footer-text);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}