adjust focus color

src/client/styles/scss/theme/_apply-colors-dark.scss

@@ -19,6 +19,9 @@ input.form-control,
 textarea.form-control {
   color: lighten($color-global, 30%);
   background-color: darken($bgcolor-global, 5%);
+  &:focus {
+    background-color: $bgcolor-global;
+  }
   // FIXME: accent color
   // border: 1px solid darken($border, 30%);
 }

src/client/styles/scss/theme/default.scss

@@ -95,10 +95,6 @@ html[dark] {
   $color-link-nabvar: $color-global;
   $color-inline-code: #c7254e;
 
-  // Input colors
-  $input-color: $color-global;
-  $input-bg: $bgcolor-global;
-
   // List Group colors
   $color-list: $color-global;
   $bgcolor-list: $bgcolor-global;