--- /dev/null
+// stylelint-disable selector-no-qualifying-type
+
+.fade {
+ @include transition($transition-fade);
+
+ &:not(.show) {
+ opacity: 0;
+ }
+}
+
+.collapse {
+ &:not(.show) {
+ display: none;
+ }
+}
+
+.collapsing {
+ position: relative;
+ height: 0;
+ overflow: hidden;
+ @include transition($transition-collapse);
+}