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+//

+// Component animations

+// --------------------------------------------------

+

+// Heads up!

+//

+// We don't use the `.opacity()` mixin here since it causes a bug with text

+// fields in IE7-8. Source: https://github.com/twbs/bootstrap/pull/3552.

+

+.fade {

+  opacity: 0;

+  .transition(opacity .15s linear);

+  &.in {

+    opacity: 1;

+  }

+}

+

+.collapse {

+  display: none;

+

+  &.in      { display: block; }

+  tr&.in    { display: table-row; }

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

+}

+

+.collapsing {

+  position: relative;

+  height: 0;

+  overflow: hidden;

+  .transition-property(~"height, visibility");

+  .transition-duration(.35s);

+  .transition-timing-function(ease);

+}