.back {
  position: absolute;
  top: 50px;
  left: 16px;
  padding: 6px 12px;
  background: #121826;
  border: 1px solid #202a3b;
  border-radius: 6px;
  color: #e6eaf2;
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s, border-color 0.2s;
}

.back:hover {
  background: #1c2333;
  border-color: #4da6ff;
}