/******** Bootstrap Collapse Styles *********/

.collapse {

display: none;
visibility: hidden;
&.in {
    display: block;
    visibility: visible;
}

} .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;

}