footer {
  background: var(--bg-footer);
  color: var(--text-on-dark);
  padding-block: var(--space-16) var(--space-6);
}

.footer__container {
  display: grid;
  gap: var(--space-6);
}

/* ------------------ Licenses Section ------------------ */

.footer__licenses {
  display: grid;
  gap: var(--space-8);
}

.footer__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-on-dark);
  text-align: center;
  justify-self: center;
  display: inline-block;
  width: fit-content;
  position: relative;
}

.footer__title::after {
  content: '';
  position: absolute;
  bottom: calc(var(--space-2) * -1);
  right: 0;
  left: 0;
  height: 3px;
  background: var(--color-secondary);
  border-radius: var(--radius-full);
}

[data-theme="dark"] .footer__title::after {
  box-shadow: 0 0 10px var(--color-secondary-dark);
}

.footer__licenses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-6);
  justify-items: center;
}

.footer__license-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  text-align: center;
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-fast);
  width: 100%;
  max-width: 180px;
}

[data-theme="dark"] .footer__license-item {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.05);
}

.footer__license-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-secondary);
  transform: translateY(-4px);
}

[data-theme="dark"] .footer__license-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.footer__license-image {
  width: 80px;
  height: 80px;
  object-fit: contain;
  filter: brightness(0.9);
  transition: filter var(--transition-fast);
}

.footer__license-item:hover .footer__license-image {
  filter: brightness(1);
}

.footer__license-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-on-dark);
}

/* ------------------ Footer Bottom ------------------ */

.footer__bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: var(--space-4);
}

/* ------------------ Social Media ------------------ */

.footer__social {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__subtitle {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-on-dark);
}

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

.footer__social-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  color: var(--text-on-dark);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.footer__social-link:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary-light);
  color: var(--text-on-dark);
  transform: translateX(-4px);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
  color: var(--color-secondary);
  transition: transform var(--transition-fast);
}

.footer__social-link:hover svg {
  transform: scale(1.1);
}

/* ------------------ Contact Info ------------------ */

.footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

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

.footer__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  color: var(--text-on-dark);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.footer__contact-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary-light);
  color: var(--text-on-dark);
}

.footer__contact-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-secondary);
  flex-shrink: 0;
}

/* ------------------ Copyright ------------------ */

.footer__copyright {
  text-align: center;
}

.footer__copyright p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

/* ------------------ Back to Top Button ------------------ */

.footer__back-to-top {
  position: fixed;
  bottom: var(--space-6);
  inset-inline-end: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--text-on-primary);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: var(--z-fixed);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .footer__back-to-top {
  background: var(--color-primary);
}

.footer__back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.footer__back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .footer__back-to-top:hover {
  background: var(--color-primary-light);
}

.footer__back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ------------------ Responsive ------------------ */

@media (max-width: 768px) {
  footer {
    padding-top: var(--space-10);
  }

  .footer__licenses-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .footer__license-item {
    max-width: none;
  }

  .footer__bottom {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__social-links {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .footer__social-link {
    flex: 1;
    min-width: 120px;
    justify-content: center;
  }

  .footer__back-to-top {
    width: 40px;
    height: 40px;
    bottom: var(--space-4);
    left: var(--space-4);
  }
}

@media (max-width: 480px) {
  .footer__licenses-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .footer__license-image {
    width: 60px;
    height: 60px;
  }

  .footer__license-name {
    font-size: var(--font-size-xs);
  }

  .footer__social-links {
    flex-direction: column;
  }

  .footer__social-link {
    min-width: auto;
    justify-content: flex-start;
  }

  .footer__contact-info {
    gap: var(--space-2);
  }

  .footer__contact-item {
    padding: var(--space-2) var(--space-3);
  }
}