Cleaned up dark mode styles inc. setting browser color scheme

Forces browser colorscheme based on BookStack color scheme, via
'color-scheme' css property.
Sets proper dark mode colors for some previously missed areas like
templates and attachment control buttons.
Also fixed search bar icon position for some search inputs.

Author: ssddanbrown

resources/sass/_blocks.scss

@@ -109,7 +109,8 @@
 }
 
 .card.border-card {
-  border: 1px solid #DDD;
+  border: 1px solid;
+  @include lightDark(border-color, #ddd, #000);
 }
 
 .card.drag-card {
@@ -133,7 +134,7 @@
     flex-grow: 0;
     padding: 0 $-xs;
     &:hover {
-      background-color: #EEE;
+      @include lightDark(background-color, #eee, #2d2d2d);
     }
     .svg-icon {
       margin-inline-end: 0px;

resources/sass/_components.scss

@@ -812,14 +812,16 @@ body.flexbox-support #entity-selector-wrap .popup-body .form-group {
     height: 100%;
     display: flex;
     flex-direction: column;
-    border-inline-start: 1px solid #DDD;
+    border-inline-start: 1px solid;
+    @include lightDark(border-color, #ddd, #000);
   }
   .template-item-actions button {
     cursor: pointer;
     flex: 1;
-    background: #FFF;
+    @include lightDark(background-color, #FFF, #222);
     border: 0;
-    border-top: 1px solid #DDD;
+    border-top: 1px solid;
+    @include lightDark(border-color, #DDD, #000);
   }
   .template-item-actions button svg {
     margin: 0;

resources/sass/_lists.scss

@@ -284,7 +284,8 @@
     padding-inline-start: $-m;
   }
   li {
-    border: 1px solid #DDD;
+    border: 1px solid;
+    @include lightDark(border-color, #DDD, #666);
     margin-top: -1px;
     min-height: 38px;
   }

resources/sass/_variables.scss

@@ -51,6 +51,10 @@ $fs-s: 12px;
 
 :root.dark-mode {
   --bg-disabled: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='100%25' width='100%25'%3E%3Cdefs%3E%3Cpattern id='doodad' width='19' height='19' viewBox='0 0 40 40' patternUnits='userSpaceOnUse' patternTransform='rotate(143)'%3E%3Crect width='100%25' height='100%25' fill='rgba(42, 67, 101,0)'/%3E%3Cpath d='M-10 30h60v20h-60zM-10-10h60v20h-60' fill='rgba(26, 32, 44,0)'/%3E%3Cpath d='M-10 10h60v20h-60zM-10-30h60v20h-60z' fill='rgba(255, 255, 255,0.05)'/%3E%3C/pattern%3E%3C/defs%3E%3Crect fill='url(%23doodad)' height='200%25' width='200%25'/%3E%3C/svg%3E");
+  color-scheme: only dark;
+}
+:root:not(.dark-mode) {
+  color-scheme: only light;
 }
 
 $positive: #0f7d15;

resources/views/entities/search-form.blade.php

@@ -5,6 +5,6 @@
     <form refs="entity-search@searchForm" class="search-box flexible" role="search">
         <input refs="entity-search@searchInput" type="text"
                aria-label="{{ $label }}" name="term" placeholder="{{ $label }}">
-        <button type="submit" aria-label="{{ trans('common.search') }}">@icon('search')</button>
+        <button tabindex="-1" type="submit" aria-label="{{ trans('common.search') }}">@icon('search')</button>
     </form>
 </div>

resources/views/pages/parts/template-manager.blade.php

@@ -13,7 +13,7 @@
 
     <div class="search-box flexible mb-m" style="display: {{ count($templates) > 0 ? 'block' : 'none' }}">
         <input refs="template-manager@searchInput" type="text" name="template-search" placeholder="{{ trans('common.search') }}">
-        <button refs="template-manager@searchButton" type="button">@icon('search')</button>
+        <button refs="template-manager@searchButton" tabindex="-1" type="button">@icon('search')</button>
         <button refs="template-manager@searchCancel" class="search-box-cancel text-neg" type="button" style="display: none">@icon('close')</button>
     </div>