.rbt-input は React Bootstrap Typeahead のクラスのため構造復帰する

src/client/styles/scss/_search.scss

@@ -102,15 +102,15 @@
 .search-top {
   margin-top: 10px;
   margin-bottom: 10px;
-}
 
-.rbt-input.form-control {
-  width: 200px;
-  transition: 0.3s ease-out;
+  .rbt-input.form-control {
+    width: 200px;
+    transition: 0.3s ease-out;
 
-  // focus
-  &.focus {
-    width: 300px;
+    // focus
+    &.focus {
+      width: 300px;
+    }
   }
 }