/* back.css */
.back-arrow {
  position: fixed;
  top: 20px;
  left: 20px;
  color: #fff;
  text-decoration: none;
  font-size: 1.8rem;
  font-weight: bold;
  transition: color 0.3s ease;
  z-index: 1000;
}
.back-arrow:hover {
  color: #2196f3;
}