/* css/footer.css */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  margin-top: auto;
  padding-top: 4rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
}

.company-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 1.2rem 0;
}

.company-details p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.footer-title {
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--brand-primary);
  transform: translateX(3px);
}

.back-to-top-btn {
  margin-top: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.back-to-top-btn:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  background: var(--bg-primary);
  padding: 1.25rem 0;
}

.footer-bottom-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}