/* ===========================
   Footer Styles
   =========================== */

.footer {
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  padding: var(--spacing-xxl) 0 var(--spacing-md);
  margin-top: var(--spacing-xxxl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  color: white;
}

.footer-section p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
}

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

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-base);
}

.footer-section ul li a:hover {
  color: white;
  padding-left: 5px;
}

/* Social Links */
.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.social-links a:hover {
  background: var(--primary-color);
  transform: translateY(-3px);
}

.social-links img {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
}

/* QR Code Container */
.qrcode-container {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

.qrcode-item {
  text-align: center;
}

.qrcode-image {
  width: 120px;
  height: 120px;
  padding: 8px;
  background: white;
  border-radius: var(--radius-medium);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all var(--transition-base);
}

.qrcode-image:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.qrcode-label {
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-weight-medium);
}

/* Footer Bottom */
.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-base);
}

.footer-bottom a:hover {
  color: white;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-medium);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

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

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-heavy);
}

/* Responsive */
@media (max-width: 992px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .qrcode-container {
    flex-direction: column;
    align-items: center;
  }

  .qrcode-image {
    width: 100px;
    height: 100px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}