fixed nav tabs border inside card header

build/scss/_cards.scss

@@ -506,9 +506,10 @@ html.maximized-card {
     }
     &.card-outline-tabs .card-header a:hover {
       border-color: $gray-600;
+      border-bottom-color: transparent;
     }
     &:not(.card-outline) > .card-header a.active {
-      color: $dark;
+      color: $white;
     }
   }
 

build/scss/_navs.scss

@@ -98,7 +98,7 @@
   @include navbar-variant($color, $value);
 }
 
-.dark-mode:not([class*="sidebar-light-"]) {
+.dark-mode *:not([class*="sidebar-light-"]) {
   &.nav-pills .nav-link {
     color: $gray-400;
   }