.floating-back-btn {
  position: fixed;
  top: 60px;
  left: 0;
  width: var(--sidebar-w, 80px);
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: white;
  font-size: 13px;
  cursor: pointer;
  z-index: 1001;
  transition: all 0.3s ease;
  border-radius: 8px;
}

.floating-back-btn:hover {
  background-color: rgba(255,255,255,0.15);
}

.floating-back-btn.hidden {
  display: none;
}