// set
.fade {
  opacity: 0;
  -webkit-transition: opacity 0.15s linear;
  -o-transition: opacity 0.15s linear;
  transition: opacity 0.15s linear;
}
.fade.in {
  opacity: 1;
}
.collapse {
  display: none;
}
.collapse.in {
  display: block;
  height: auto;
}
tr.collapse.in {
  display: table-row;
}
tbody.collapse.in {
  display: table-row-group;
}
.collapsing {
  position: relative;
  height: 0;
  overflow: hidden;
  -webkit-transition-property: height, visibility;
  -o-transition-property: height, visibility;
     transition-property: height, visibility;
  -webkit-transition-duration: 0.35s;
  -o-transition-duration: 0.35s;
     transition-duration: 0.35s;
  -webkit-transition-timing-function: ease;
  -o-transition-timing-function: ease;
     transition-timing-function: ease;
}