.fade.in {
  opacity: 1;
}
.collapse {
  display: none;
}
.collapse.in {
  display: block;
}

.collapsing {
  position: relative;
  height: 0;
  overflow: hidden;
  -webkit-transition-timing-function: ease;
       -o-transition-timing-function: ease;
          transition-timing-function: ease;
  -webkit-transition-duration: .35s;
       -o-transition-duration: .35s;
          transition-duration: .35s;
  -webkit-transition-property: height, visibility;
       -o-transition-property: height, visibility;
          transition-property: height, visibility;
}

.navbar-default .navbar-toggle {
    border-color: #ddd;
}

.navbar-toggle {
    background-color: transparent;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
    float: right;
    margin-bottom: 8px;
    margin-right: 15px;
    margin-top: 8px;
    padding: 9px 10px;
    position: relative;
}

.navbar-default .navbar-toggle .icon-bar {
    background-color: #888;
}
.navbar-toggle .icon-bar {
    border-radius: 1px;
    display: block;
    height: 2px;
    width: 22px;
}
.navbar-toggle .icon-bar + .icon-bar {
    margin-top: 4px;
}