Nest .is--visible declarations

Author: mmistakes

_sass/basically-basic/_sidebar.scss

@@ -82,16 +82,16 @@
       transform: none;
       box-shadow: 0 1em 5em 0 rgba(0, 0, 0, 0.125);
     }
+
+    &.is--animatable > .inner {
+      transition: all 330ms ease-out;
+    }
   }
 
   &.is--animatable > .inner {
     transition: all 130ms ease-in;
   }
 
-  &.is--visible.is--animatable > .inner {
-    transition: all 330ms ease-out;
-  }
-
   > .inner {
     position: relative;
     width: 100%;