.upper-bar-icon {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  padding: 2px;
  cursor: pointer;
  color: $tone-1-color;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
  border: none;
  background-color: transparent;
  margin: 0 4px;

  &:hover {
    background-color: $tone-4-color;
    opacity: 1;
  }

  &:active {
    background-color: $tone-6-color;
    opacity: 1;
  }

  &:disabled {
    opacity: 0.4;
  }
}