.fade
{
    -webkit-transition: opacity .15s linear;
            transition: opacity .15s linear;

    opacity: 0;
}

.fade.in
{
    opacity: 1;
}

.collapse
{
    display: none;
}

.collapse.in
{
    display: block;
}

tr.collapse.in
{
    display: table-row;
}

tbody.collapse.in
{
    display: table-row-group;
}

.collapsing
{
    position: relative;

    overflow: hidden;

    height: 0;

    -webkit-transition-timing-function: ease;
            transition-timing-function: ease;
    -webkit-transition-duration: .35s;
            transition-duration: .35s;
    -webkit-transition-property: height;
            transition-property: height;
}