Fix layout pages with Tailwind CSS dark mode

web/themes/custom/opdavies/templates/block/block--layout-builder.html.twig

@@ -0,0 +1,39 @@
+{#
+/**
+ * @file
+ * Theme override to display a block.
+ *
+ * Available variables:
+ * - plugin_id: The ID of the block implementation.
+ * - label: The configured label of the block if visible.
+ * - configuration: A list of the block's configuration values.
+ *   - label: The configured label for the block.
+ *   - label_display: The display settings for the label.
+ *   - provider: The module or other provider that provided this block plugin.
+ *   - Block plugin specific settings will also be stored here.
+ * - in_preview: Whether the plugin is being rendered in preview mode.
+ * - content: The content of this block.
+ * - attributes: array of HTML attributes populated by modules, intended to
+ *   be added to the main container tag of this template.
+ *   - id: A valid HTML ID and guaranteed unique.
+ * - title_attributes: Same as attributes, except applied to the main title
+ *   tag that appears in the template.
+ * - title_prefix: Additional output populated by modules, intended to be
+ *   displayed in front of the main title tag that appears in the template.
+ * - title_suffix: Additional output populated by modules, intended to be
+ *   displayed after the main title tag that appears in the template.
+ *
+ * @see template_preprocess_block()
+ */
+#}
+<div{{ attributes.addClass('dark:bg-gray-900') }}>
+  {{ title_prefix }}
+  {% if label %}
+    <h2{{ title_attributes.addClass('mb-4 text-xl font-bold') }}>{{ label }}</h2>
+  {% endif %}
+  {{ title_suffix }}
+
+  {% block content %}
+    {{ content }}
+  {% endblock %}
+</div>

web/themes/custom/opdavies/templates/forms/container.html.twig

@@ -0,0 +1,29 @@
+{#
+/**
+ * @file
+ * Theme override of a container used to wrap child elements.
+ *
+ * Used for grouped form items. Can also be used as a theme wrapper for any
+ * renderable element, to surround it with a <div> and HTML attributes.
+ * See \Drupal\Core\Render\Element\RenderElement for more
+ * information on the #theme_wrappers render array property, and
+ * \Drupal\Core\Render\Element\container for usage of the container render
+ * element.
+ *
+ * Available variables:
+ * - attributes: HTML attributes for the containing element.
+ * - children: The rendered child elements of the container.
+ * - has_parent: A flag to indicate that the container has one or more parent
+     containers.
+ *
+ * @see template_preprocess_container()
+ */
+#}
+{%
+  set classes = [
+    'dark:bg-gray-900 [&>a]:text-white',
+    has_parent ? 'js-form-wrapper',
+    has_parent ? 'form-wrapper',
+  ]
+%}
+<div{{ attributes.addClass(classes) }}>{{ children }}</div>