/* Footer Component */
.footer {
  background-color: var(--bg-dark);
  color: var(--text-inverse);
  padding-top: var(--spacing-5xl);
  padding-bottom: var(--spacing-xl);
  margin-top: var(--spacing-5xl);
}

.footer__container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
  .footer__container {
    padding: 0 var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .footer__container {
    padding: 0 var(--spacing-xl);
  }
}

/* Footer Content */
.footer__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-4xl);
}

@media (min-width: 640px) {
  .footer__content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .footer__content {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer__content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* Footer Brand */
.footer__brand {
  grid-column: 1 / -1;
}

@media (min-width: 1024px) {
  .footer__brand {
    grid-column: 1 / 2;
  }
}

.footer__logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-inverse);
  text-decoration: none;
  margin-bottom: var(--spacing-md);
  transition: color var(--transition-fast);
}

.footer__logo:hover {
  color: var(--color-accent);
}

.footer__logo-icon {
  width: 32px;
  height: 32px;
  margin-right: var(--spacing-sm);
  fill: currentColor;
}

.footer__description {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-300);
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
}

/* Social Links */
.footer__social {
  display: flex;
  gap: var(--spacing-md);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--color-gray-700);
  border-radius: var(--border-radius-lg);
  color: var(--text-inverse);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
}

.footer__social-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Footer Sections */
.footer__section {
  /* Grid placement handled by parent */
}

.footer__section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-inverse);
  margin-bottom: var(--spacing-lg);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__nav-link {
  color: var(--color-gray-300);
  text-decoration: none;
  font-size: var(--font-size-base);
  transition: color var(--transition-fast);
  padding: var(--spacing-xs) 0;
}

.footer__nav-link:hover,
.footer__nav-link:focus {
  color: var(--color-accent);
}

/* Contact Info */
.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-300);
}

.footer__contact-icon {
  width: 20px;
  height: 20px;
  fill: var(--color-secondary);
  margin-top: 2px;
  flex-shrink: 0;
}

.footer__contact-text {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

.footer__contact-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__contact-link:hover {
  color: var(--color-accent);
}

/* Newsletter */
.footer__newsletter {
  margin-top: var(--spacing-lg);
}

.footer__newsletter-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-inverse);
  margin-bottom: var(--spacing-sm);
}

.footer__newsletter-form {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.footer__newsletter-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-gray-700);
  border: 1px solid var(--color-gray-600);
  border-radius: var(--border-radius-lg);
  color: var(--text-inverse);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
}

.footer__newsletter-input::placeholder {
  color: var(--color-gray-400);
}

.footer__newsletter-input:focus {
  outline: none;
  border-color: var(--color-secondary);
}

.footer__newsletter-button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-secondary);
  border: none;
  border-radius: var(--border-radius-lg);
  color: var(--text-inverse);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  white-space: nowrap;
}

.footer__newsletter-button:hover {
  background-color: var(--color-secondary-dark);
}

.footer__newsletter-text {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  line-height: var(--line-height-normal);
}

/* Footer Bottom */
.footer__bottom {
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--color-gray-700);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.footer__legal {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

@media (min-width: 768px) {
  .footer__legal {
    justify-content: flex-end;
  }
}

.footer__legal-link {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Back to Top Button */
.footer__back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background-color: var(--color-secondary);
  border: none;
  border-radius: 50%;
  color: var(--text-inverse);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: var(--z-index-fixed);
  box-shadow: var(--shadow-lg);
}

.footer__back-to-top--visible {
  opacity: 1;
  visibility: visible;
}

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

.footer__back-to-top-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Mobile Responsive */
@media (max-width: 639px) {
  .footer__newsletter-form {
    flex-direction: column;
  }

  .footer__newsletter-button {
    align-self: flex-start;
  }

  .footer__legal {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* Accessibility */
.footer__nav-link:focus,
.footer__social-link:focus,
.footer__contact-link:focus,
.footer__newsletter-input:focus,
.footer__newsletter-button:focus,
.footer__back-to-top:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .footer {
    background: white;
    color: black;
    box-shadow: none;
  }

  .footer__social,
  .footer__newsletter,
  .footer__back-to-top {
    display: none;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .footer__social-link:hover,
  .footer__back-to-top:hover {
    transform: none;
  }

  .footer__back-to-top {
    transition: opacity var(--transition-fast),
      visibility var(--transition-fast);
  }
}