.back-btn {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  color: #333;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: background 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  color: #333;
}

.back-btn .back-arrow {
  font-size: 16px;
}

[data-theme="dark"] .back-btn {
  background: rgba(50, 50, 50, 0.75);
  color: #ccc;
}

[data-theme="dark"] .back-btn:hover {
  background: rgba(50, 50, 50, 0.95);
  color: #eee;
}