1 files changed, 15 insertions, 8 deletions
diff --git a/lib/patterns.less b/lib/patterns.less
index 01b32cd90..1b4c5a941 100644
--- a/lib/patterns.less
+++ b/lib/patterns.less
@@ -631,14 +631,6 @@ input[type=submit].btn {
 }
 
 
-
-
-
-
-
-
-
-
 // PATTERN ANIMATIONS
 // ------------------
 
@@ -650,6 +642,21 @@ input[type=submit].btn {
   }
 }
 
+.collapse {
+  position:relative;
+  overflow:hidden;
+  &.height {
+    .transition(height .35s ease);
+    height: 0;
+    &.in { height: auto; }
+  }
+  &.width {
+    .transition(width .35s ease);
+    width: 0;
+    &.in { width: auto; }
+  }
+}
+
 
 // LABELS
 // ------