feat(docs): dark theme background

packages/docs/src/app/components/anchors/_anchors-theme.scss

@@ -1,10 +1,16 @@
 @mixin mc-anchors-theme($theme) {
     $foreground: map-get($theme, foreground);
+    $background: map-get($theme, background);
+    $background-color: mc-color($background, background);
     $text: mc-color($foreground, text);
     $primary: map_get($theme, primary);
     $primary_500: mc-color($primary, 500);
     $shadow: mc-color($foreground, less-contrast-text);
 
+    .anchors-menu {
+        background-color: $background-color;
+    }
+
     .anchors-menu__list-element {
         color: $text;
 

packages/docs/src/styles/_common.scss

@@ -28,7 +28,7 @@ html {
 
 body {
     display: flex;
-    height: 100vh;
+    min-height: 100vh;
     font-family: map-get(map-get($fonts, 'base'), font-family);
     margin: 0; // 1
 }