Fixes cards in dark theme mode

src/scss/_dark.scss

@@ -7,6 +7,8 @@
   }
 
   .card,
+  .card-footer,
+  .card-stacked::after,
   .footer:not(.footer-transparent),
   .modal-content,
   .modal-header,
@@ -20,6 +22,16 @@
     border-color: transparent;
   }
 
+  .card-tabs .nav-tabs .nav-link {
+    background-color: $dark-mode-darken;
+    color: inherit;
+  }
+
+  .card-tabs .nav-tabs .nav-link.active {
+    background-color: $dark;
+    color: inherit;
+  }
+
   .btn-white,
   .form-file-button {
     //@include button-variant($dark-mode-lighten, $border-color, $dark-mode-text, rgba($dark, 0), $border-color, $dark-mode-text);