.hidden {
  display: none;
}

button:focus {
  outline:0;
}

/** toggle ***************************************/
.toggle:hover {
  cursor: pointer;
}

.toggle.closed {
  background: url(../images/folder_closed.png) no-repeat;
}

.toggle.opened {
  background: url(../images/folder_opened.png) no-repeat;
}

button.toggle {
  width: 48px;
  height: 22px;
  text-indent: -100000em;
  border: none;
}

/** toggle ***************************************/
.toggle-green:hover {
  cursor: pointer;
}

.toggle-green.closed {
  background: url(../images/folder_closed.png) no-repeat;
}

.toggle-green.opened {
  background: url(../images/folder_opened.png) no-repeat;
}

button.toggle-green {
  width: 48px;
  height: 22px;
  text-indent: -100000em;
  border: none;
}