/* ========================================
   Footer Styles
   ======================================== */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 80px 0 32px;
  color: var(--text);
  position: relative;
}

/* Newsletter Section */
.footer-newsletter {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px;
  margin-bottom: 80px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.newsletter-content h3 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}

.newsletter-content p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.6;
}

.newsletter-input-group {
  display: flex;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  align-items: center;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.newsletter-input-group svg {
  margin-left: 12px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.newsletter-input-group input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  outline: none;
  padding: 8px;
}

.newsletter-input-group input::placeholder {
  color: var(--text-secondary);
}

/* Footer Content */
.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 64px;
  width: 100%;
  min-width: 0;
}

.footer-col-brand {
  max-width: 350px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text);
}

.footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  font-size: 18px;
}

.footer-col p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
  font-size: 15px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-col h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 14px;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  font-size: 15px;
  display: inline-block;
}

.footer-col a:hover {
  color: var(--text);
  transform: translateX(4px);
}

/* Footer Bottom */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom-left {
  flex: 1;
  min-width: 0;
}

.footer-links {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-links .separator {
  color: var(--border);
}

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

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

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 90;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Footer Responsive */
@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .footer-newsletter {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .site-footer {
    padding: 60px 0 24px;
  }

  .footer-newsletter {
    padding: 32px 20px;
    margin-bottom: 48px;
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .newsletter-content {
    text-align: center;
  }

  .newsletter-content h3 {
    font-size: clamp(20px, 4vw, 24px);
    margin-bottom: 12px;
  }

  .newsletter-content p {
    font-size: clamp(13px, 2vw, 14px);
    margin-bottom: 0;
  }

  .newsletter-input-group {
    flex-direction: column;
    gap: 12px;
    padding: 12px;
  }

  .newsletter-input-group svg {
    margin-left: 0;
    width: 20px;
    height: 20px;
  }

  .newsletter-input-group input {
    flex: 1;
    width: 100%;
    font-size: 14px;
    padding: 12px;
  }

  .newsletter-input-group .btn {
    width: 100%;
    padding: 12px 20px;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }

  .footer-col-brand {
    grid-column: 1 / -1;
  }

  .footer-col:last-child {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .footer-newsletter {
    padding: 24px 16px;
  }

  .newsletter-content h3 {
    font-size: 20px;
  }

  .newsletter-input-group {
    flex-direction: column;
    padding: 12px;
  }

  .newsletter-input-group input {
    min-width: 100%;
    width: 100%;
  }

  .newsletter-input-group .btn {
    width: 100%;
  }

  .footer-content {
    gap: 32px 16px;
  }
}