#backBtn {
  background-color: #f0f0f0;
  color: #333;
  border: 1px solid #ccc;
  padding: 6px 12px;
  font-size: 14px;
  border-radius: 3px;
  cursor: pointer;
  transition: background-color 0.3s, box-shadow 0.3s;
}

#backBtn:hover {
  background-color: #e0e0e0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

#backBtn:active {
  transform: translateY(1px);
}

#backBtn:focus {
  outline: 2px solid #99c2ff;
  outline-offset: 2px;
}