// // Collapse // ————————————————–
.collapse {
display: none; &.in { display: block; }
}
.collapsing {
position: relative; height: 0; overflow: hidden; transition-property: height, visibility; transition-duration: .35s; transition-timing-function: ease;
}
.collapse-open {
margin-top: building-units(-4); margin-left: building-units(1); display: block; opacity: 0; @include transition(opacity $transition-time-out $transition-function); &.collapsed { opacity: 1; }
}