feat: Bootstrap 5 block renderer, widget cards, and sidebar post layout (v1.1.0)

Add BlockRenderer class injecting Bootstrap classes into 8 core block types
(table, button, buttons, image, search, quote, pullquote, list) via per-block
render_block filters using WP_HTML_Tag_Processor.

Add WidgetRenderer class wrapping sidebar widgets in Bootstrap card components
with h4 heading hierarchy via dynamic_sidebar_params and widget_block_content
filters.

Add widget SCSS stylesheet for list styling, search input-group, tag cloud
pills, and card-flush list positioning.

Add single-sidebar.html.twig as the default post template with two-column
Bootstrap layout (col-lg-8 content, col-lg-4 sidebar). Full-width available
via template selection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,31 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.1.0] - 2026-02-28
+
+### Added
+
+- **Block Renderer** (`inc/Block/BlockRenderer.php`): New class that injects Bootstrap 5 classes into WordPress core block HTML output on the frontend via per-block `render_block_{$name}` filters. Handles 8 block types:
+  - `core/table` — `.table` on `<table>`, `.table-striped` when stripes style is active
+  - `core/button` — `.btn` + `.btn-{variant}` or `.btn-outline-{variant}` mapped from WP preset color slugs
+  - `core/buttons` — `.d-flex .flex-wrap .gap-2` on button group wrapper
+  - `core/image` — `.img-fluid` on `<img>` for responsive images
+  - `core/search` — `.input-group` on inner wrapper, `.form-control` on input, `.btn .btn-primary` on button
+  - `core/quote` — `.blockquote` on `<blockquote>`, `.blockquote-footer` on `<cite>`
+  - `core/pullquote` — Same blockquote treatment inside `<figure>`
+  - `core/list` — `.list-group` + `.list-group-item` when `is-style-list-group` block style is selected
+- **Widget Renderer** (`inc/Block/WidgetRenderer.php`): New class that transforms sidebar widgets into Bootstrap 5 card components via `dynamic_sidebar_params` and `widget_block_content` filters. Wraps each widget in a `.card > .card-body` structure with `.card-title` headings. Downgrades block widget `<h2>` headings to `<h4>` for proper sidebar visual hierarchy.
+- **Widget SCSS** (`src/scss/_widgets.scss`): New stylesheet for sidebar widget Bootstrap styling — list-group-style list items with border separators, flush-to-card-edge list positioning, Bootstrap form-control styling for select dropdowns, search form input-group layout, tag cloud with pill badges, and secondary-color post dates.
+- **List Group block style**: New "List Group" style registered for `core/list` blocks — applies Bootstrap `.list-group` and `.list-group-item` classes when selected in the editor.
+- **Single post sidebar template** (`views/pages/single-sidebar.html.twig`): New two-column layout for blog posts with `col-lg-8` content area and `col-lg-4` sidebar. Includes all single post features (meta, thumbnail, tags, post navigation, comments, more posts). "More posts" section uses `row-cols-md-2` to fit the narrower column.
+- **Extensibility**: `wp_bootstrap_block_renderer_blocks` filter allows child themes to add/remove block handler mappings.
+
+### Changed
+
+- **Post template default** (`inc/Template/TemplateController.php`): Blog posts now render with the sidebar layout by default (`single-sidebar.html.twig`). Posts assigned the "Full Width" template use `single.html.twig` instead. Template selection uses `get_page_template_slug()` with a `match` expression.
+- **Sidebar data for posts** (`inc/Template/ContextBuilder.php`): Posts always receive sidebar data (recent posts, tags, widgets) regardless of template selection, ensuring the sidebar partial always has data available.
+- **Widget SCSS import** (`src/scss/style.scss`): Added `_widgets` partial import between Bootstrap Icons and custom styles.
+
 ## [1.0.12] - 2026-02-28
 
 ### Fixed

CLAUDE.md

@@ -34,7 +34,7 @@ This project is proudly **"vibe-coded"** using Claude.AI - the entire codebase w
 
 **Note for AI Assistants:** Clean this section after the specific features are done or new releases are made. Effective changes are tracked in `CHANGELOG.md`. Do not add completed versions here - document them in the Session History section at the end of this file.
 
-Current version is **v1.0.11**. See `PLAN.md` for details.
+Current version is **v1.1.0**. See `PLAN.md` for details.
 
 ## Technical Stack
 
@@ -234,6 +234,60 @@ Build steps (in order):
 
 ## Session History
 
+### Session 19 — v1.1.0 Block Renderer, Widget Renderer & Sidebar Post Layout (2026-02-28)
+
+**Completed:** Bootstrap 5 class injection for core blocks, sidebar widget card wrappers, widget SCSS styling, and sidebar-default post template.
+
+**What was built:**
+
+- **BlockRenderer** (`inc/Block/BlockRenderer.php`): Per-block `render_block_{$name}` filters inject Bootstrap classes into 8 core block types using `WP_HTML_Tag_Processor`. Supports button color mapping (WP preset slugs → Bootstrap btn-{variant}), striped tables, responsive images, input-group search forms, blockquote styling, and list-group block style. Extensible via `wp_bootstrap_block_renderer_blocks` filter.
+- **WidgetRenderer** (`inc/Block/WidgetRenderer.php`): `dynamic_sidebar_params` filter wraps sidebar widgets in Bootstrap `.card > .card-body` structure. `widget_block_content` filter downgrades block widget `<h2 class="wp-block-heading">` to `<h4>` via preg_replace. Widget ID and type-specific classes extracted from the already-processed `before_widget` string.
+- **Widget SCSS** (`src/scss/_widgets.scss`): Comprehensive widget styling — list items with border separators, flush-to-card-edge positioning (negating card-body padding), form-control selects, input-group search forms, pill-badge tag cloud, and secondary-color post dates. Handles both legacy and block widget nesting (`.wp-block-group > ul`).
+- **List Group block style** (`functions.php`): `register_block_style('core/list', ...)` for the `is-style-list-group` style option in the editor.
+- **Single post sidebar template** (`views/pages/single-sidebar.html.twig`): Two-column Bootstrap layout (8/4 split) with all single post features. "More posts" section uses `row-cols-md-2` for the narrower column.
+- **Post template selection** (`inc/Template/TemplateController.php`): Posts default to sidebar layout; `page-full-width` template slug maps to full-width.
+- **Sidebar data always loaded for posts** (`inc/Template/ContextBuilder.php`): `getSidebarData()` called unconditionally for `is_singular('post')`.
+
+**Architecture decisions:**
+
+- **Per-block filters over generic `render_block`**: `render_block_{$blockName}` only fires for the targeted block type, avoiding callback overhead on every block render. More maintainable — each handler is scoped to one block type.
+- **`WP_HTML_Tag_Processor` over regex**: WordPress 6.7+ class provides safe, forward-only HTML manipulation. `add_class()` is idempotent (no duplicate classes). Handles malformed HTML gracefully.
+- **Card-body with card-title, not card-header**: WordPress omits `before_title`/`after_title` entirely when a widget has no title. Using `card-header` for the title would leave an empty `<div class="card-header"></div>` for titleless widgets — broken HTML. Card-body with card-title inside works correctly in both cases.
+- **`dynamic_sidebar_params` + regex extraction**: WordPress runs `sprintf` on `before_widget` BEFORE the `dynamic_sidebar_params` filter fires, so placeholder strings (`%1$s`, `%2$s`) are already replaced. Widget ID comes from `$params[0]['widget_id']`, type classes extracted via regex from the processed HTML.
+- **Sidebar default for posts**: Blog posts are content-centric and benefit from sidebar context (recent posts, search, tags). Full-width is opt-in via "Full Width" template assignment.
+
+**Key findings:**
+
+- `WP_Block $instance` type hint is too strict for manual `apply_filters()` calls — WordPress passes `null` when filters are invoked outside the block rendering pipeline. Use `?WP_Block $instance = null`.
+- Block widgets nest content inside `.wp-block-group` wrappers. CSS selectors like `.card-body > ul` won't match — need `.card-body > .wp-block-group > ul` for flush list positioning.
+- `widget_block_content` filter (WordPress 5.8+) fires for block-based widgets only, allowing inner HTML modification without affecting legacy widgets.
+- WordPress search block uses `.wp-block-search__inside-wrapper` as the input+button container — adding `.input-group` to this element creates a proper Bootstrap input-group.
+- `@extend .btn; @extend .btn-primary` in SCSS works for search submit buttons because Bootstrap is imported before the widgets partial in the SCSS cascade.
+
+**Files created:**
+
+- `inc/Block/BlockRenderer.php` — 8 block handlers
+- `inc/Block/WidgetRenderer.php` — card wrapper + heading downgrade
+- `src/scss/_widgets.scss` — widget Bootstrap styling
+- `views/pages/single-sidebar.html.twig` — two-column post template
+
+**Files modified:**
+
+- `functions.php` — init hooks for both renderers, list-group block style
+- `src/scss/style.scss` — widgets import
+- `inc/Template/TemplateController.php` — post template selection logic
+- `inc/Template/ContextBuilder.php` — always load sidebar for posts
+- `style.css` — version bump to 1.1.0
+- `CHANGELOG.md`, `README.md`, `CLAUDE.md` — documentation
+
+### Session 18 — v1.0.12 Admin Bar Offcanvas Fix (2026-02-28)
+
+**Completed:** Scoped admin bar offcanvas padding to mobile viewports only.
+
+**What was fixed:**
+
+- `functions.php`: Added `@media (max-width: 991.98px)` wrapper to the admin bar offcanvas padding CSS so the extra padding does not appear on desktop where the offcanvas renders inline as a regular navbar.
+
 ### Session 17 — v1.0.11 Offcanvas Navigation & User Context (2026-02-28)
 
 **Completed:** Switched mobile navigation from Bootstrap collapse to offcanvas, added logged-in user context to the header, and fixed admin bar overlap.

README.md

@@ -10,8 +10,10 @@ A modern WordPress Block Theme built from scratch with Bootstrap 5. Features res
 - **Style Variations** -- 15 color schemes (7 light, 7 dark, plus default) with live Design Editor customization
 - **Block Patterns** -- 41 patterns across 11 categories (hero, features, CTA, testimonials, pricing, contact, text, layout, components, navigation, pages)
 - **Bootstrap Icons** -- 2,000+ icons available via CSS classes (`bi bi-*`)
-- **Block Styles** -- 17 custom styles mapping Bootstrap components to WordPress blocks
-- **Custom Templates** -- Landing (no header/footer), full-width, hero, sidebar page templates
+- **Block Renderer** -- Automatic Bootstrap 5 class injection on 8 core block types (table, button, image, search, quote, pullquote, list) via `render_block` filters
+- **Widget Renderer** -- Sidebar widgets wrapped in Bootstrap cards with proper heading hierarchy
+- **Block Styles** -- 18 custom styles mapping Bootstrap components to WordPress blocks (including List Group)
+- **Custom Templates** -- Landing (no header/footer), full-width, hero, sidebar page templates; blog posts default to sidebar layout
 - **Header/Footer Variations** -- Default, centered, transparent headers; default, minimal, multi-column footers
 - **Navigation Styles** -- Dark navbar, offcanvas mobile navigation
 - **Widget Area** -- Sidebar widget area manageable via WordPress admin, with built-in fallback
@@ -98,6 +100,8 @@ WordPress style variation colors are bridged to Bootstrap CSS custom properties
 | `TemplateController` | Hooks `template_redirect`, resolves and renders Twig templates |
 | `ContextBuilder` | Gathers WordPress data (posts, menus, pagination, comments, sidebar) |
 | `NavWalker` | Converts flat menu items to nested tree for Bootstrap dropdowns |
+| `BlockRenderer` | Injects Bootstrap 5 classes into core block HTML via `render_block` filters |
+| `WidgetRenderer` | Wraps sidebar widgets in Bootstrap card components |
 
 ### Navigation Menus
 
@@ -110,7 +114,15 @@ If no menu is assigned, the primary location falls back to listing published pag
 
 ### Widget Areas
 
-The theme registers a **Sidebar** widget area. When widgets are assigned via **Appearance > Widgets**, they replace the default sidebar content. When no widgets are assigned, the sidebar displays recent posts, a search form, and a tag cloud.
+The theme registers a **Sidebar** widget area. When widgets are assigned via **Appearance > Widgets**, they replace the default sidebar content. When no widgets are assigned, the sidebar displays recent posts, a search form, and a tag cloud. All sidebar widgets are automatically wrapped in Bootstrap card components with consistent heading styles.
+
+### Block Renderer
+
+The `BlockRenderer` class hooks per-block `render_block_{$name}` filters (more performant than a single `render_block` filter) and uses WordPress's `WP_HTML_Tag_Processor` for safe, idempotent class injection. Only active on the frontend — admin, REST API, and AJAX requests are skipped. Child themes can modify the block-to-handler map via the `wp_bootstrap_block_renderer_blocks` filter.
+
+### Widget Renderer
+
+The `WidgetRenderer` class transforms sidebar widget output into Bootstrap card components. It hooks `dynamic_sidebar_params` for wrapper HTML and `widget_block_content` for inner content adjustments (heading level downgrade from `<h2>` to `<h4>`). The card structure uses `card-body` with `card-title` inside, ensuring valid HTML whether or not a widget outputs a title.
 
 ### Project Structure
 
@@ -118,6 +130,7 @@ The theme registers a **Sidebar** widget area. When widgets are assigned via **A
 wp-bootstrap/
 +-- assets/           Compiled CSS, JS, fonts
 +-- inc/
+|   +-- Block/        BlockRenderer, WidgetRenderer
 |   +-- Template/     TemplateController, ContextBuilder, NavWalker
 |   +-- Twig/         TwigService singleton
 +-- languages/        Translation files (.pot, .po)

assets/css/style.css

@@ -2443,7 +2443,7 @@ textarea.form-control-lg {
   clip: rect(0, 0, 0, 0);
   pointer-events: none;
 }
-.btn-check[disabled] + .btn, .btn-check:disabled + .btn {
+.btn-check[disabled] + .btn, .widget .search-form .btn-check[disabled] + .search-submit, .btn-check:disabled + .btn, .widget .search-form .btn-check:disabled + .search-submit {
   pointer-events: none;
   filter: none;
   opacity: 0.65;
@@ -2642,11 +2642,11 @@ textarea.form-control-lg {
 .input-group > .form-floating:focus-within {
   z-index: 5;
 }
-.input-group .btn {
+.input-group .btn, .input-group .widget .search-form .search-submit, .widget .search-form .input-group .search-submit {
   position: relative;
   z-index: 2;
 }
-.input-group .btn:focus {
+.input-group .btn:focus, .input-group .widget .search-form .search-submit:focus, .widget .search-form .input-group .search-submit:focus {
   z-index: 5;
 }
 
@@ -2668,7 +2668,8 @@ textarea.form-control-lg {
 .input-group-lg > .form-control,
 .input-group-lg > .form-select,
 .input-group-lg > .input-group-text,
-.input-group-lg > .btn {
+.input-group-lg > .btn,
+.widget .search-form .input-group-lg > .search-submit {
   padding: 0.5rem 1rem;
   font-size: 1.25rem;
   border-radius: var(--bs-border-radius-lg);
@@ -2677,7 +2678,8 @@ textarea.form-control-lg {
 .input-group-sm > .form-control,
 .input-group-sm > .form-select,
 .input-group-sm > .input-group-text,
-.input-group-sm > .btn {
+.input-group-sm > .btn,
+.widget .search-form .input-group-sm > .search-submit {
   padding: 0.25rem 0.5rem;
   font-size: 0.875rem;
   border-radius: var(--bs-border-radius-sm);
@@ -2893,7 +2895,7 @@ textarea.form-control-lg {
   z-index: 4;
 }
 
-.btn {
+.btn, .widget .search-form .search-submit {
   --bs-btn-padding-x: 0.75rem;
   --bs-btn-padding-y: 0.375rem;
   --bs-btn-font-family: ;
@@ -2927,44 +2929,44 @@ textarea.form-control-lg {
   transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
 }
 @media (prefers-reduced-motion: reduce) {
-  .btn {
+  .btn, .widget .search-form .search-submit {
     transition: none;
   }
 }
-.btn:hover {
+.btn:hover, .widget .search-form .search-submit:hover {
   color: var(--bs-btn-hover-color);
   background-color: var(--bs-btn-hover-bg);
   border-color: var(--bs-btn-hover-border-color);
 }
-.btn-check + .btn:hover {
+.btn-check + .btn:hover, .widget .search-form .btn-check + .search-submit:hover {
   color: var(--bs-btn-color);
   background-color: var(--bs-btn-bg);
   border-color: var(--bs-btn-border-color);
 }
-.btn:focus-visible {
+.btn:focus-visible, .widget .search-form .search-submit:focus-visible {
   color: var(--bs-btn-hover-color);
   background-color: var(--bs-btn-hover-bg);
   border-color: var(--bs-btn-hover-border-color);
   outline: 0;
   box-shadow: var(--bs-btn-focus-box-shadow);
 }
-.btn-check:focus-visible + .btn {
+.btn-check:focus-visible + .btn, .widget .search-form .btn-check:focus-visible + .search-submit {
   border-color: var(--bs-btn-hover-border-color);
   outline: 0;
   box-shadow: var(--bs-btn-focus-box-shadow);
 }
-.btn-check:checked + .btn, :not(.btn-check) + .btn:active, .btn:first-child:active, .btn.active, .btn.show {
+.btn-check:checked + .btn, .widget .search-form .btn-check:checked + .search-submit, :not(.btn-check) + .btn:active, .widget .search-form :not(.btn-check) + .search-submit:active, .btn:first-child:active, .widget .search-form .search-submit:first-child:active, .btn.active, .widget .search-form .active.search-submit, .btn.show, .widget .search-form .show.search-submit {
   color: var(--bs-btn-active-color);
   background-color: var(--bs-btn-active-bg);
   border-color: var(--bs-btn-active-border-color);
 }
-.btn-check:checked + .btn:focus-visible, :not(.btn-check) + .btn:active:focus-visible, .btn:first-child:active:focus-visible, .btn.active:focus-visible, .btn.show:focus-visible {
+.btn-check:checked + .btn:focus-visible, .widget .search-form .btn-check:checked + .search-submit:focus-visible, :not(.btn-check) + .btn:active:focus-visible, .widget .search-form :not(.btn-check) + .search-submit:active:focus-visible, .btn:first-child:active:focus-visible, .widget .search-form .search-submit:first-child:active:focus-visible, .btn.active:focus-visible, .widget .search-form .active.search-submit:focus-visible, .btn.show:focus-visible, .widget .search-form .show.search-submit:focus-visible {
   box-shadow: var(--bs-btn-focus-box-shadow);
 }
-.btn-check:checked:focus-visible + .btn {
+.btn-check:checked:focus-visible + .btn, .widget .search-form .btn-check:checked:focus-visible + .search-submit {
   box-shadow: var(--bs-btn-focus-box-shadow);
 }
-.btn:disabled, .btn.disabled, fieldset:disabled .btn {
+.btn:disabled, .widget .search-form .search-submit:disabled, .btn.disabled, .widget .search-form .disabled.search-submit, fieldset:disabled .btn, fieldset:disabled .widget .search-form .search-submit, .widget .search-form fieldset:disabled .search-submit {
   color: var(--bs-btn-disabled-color);
   pointer-events: none;
   background-color: var(--bs-btn-disabled-bg);
@@ -2972,7 +2974,7 @@ textarea.form-control-lg {
   opacity: var(--bs-btn-disabled-opacity);
 }
 
-.btn-primary {
+.btn-primary, .widget .search-form .search-submit {
   --bs-btn-color: #FFFFFF;
   --bs-btn-bg: #0d6efd;
   --bs-btn-border-color: #0d6efd;
@@ -3266,14 +3268,14 @@ textarea.form-control-lg {
   color: var(--bs-btn-hover-color);
 }
 
-.btn-lg, .btn-group-lg > .btn {
+.btn-lg, .btn-group-lg > .btn, .widget .search-form .btn-group-lg > .search-submit {
   --bs-btn-padding-y: 0.5rem;
   --bs-btn-padding-x: 1rem;
   --bs-btn-font-size: 1.25rem;
   --bs-btn-border-radius: var(--bs-border-radius-lg);
 }
 
-.btn-sm, .btn-group-sm > .btn {
+.btn-sm, .btn-group-sm > .btn, .widget .search-form .btn-group-sm > .search-submit {
   --bs-btn-padding-y: 0.25rem;
   --bs-btn-padding-x: 0.5rem;
   --bs-btn-font-size: 0.875rem;
@@ -3640,23 +3642,35 @@ textarea.form-control-lg {
   display: inline-flex;
   vertical-align: middle;
 }
-.btn-group > .btn,
-.btn-group-vertical > .btn {
+.btn-group > .btn, .widget .search-form .btn-group > .search-submit,
+.btn-group-vertical > .btn,
+.widget .search-form .btn-group-vertical > .search-submit {
   position: relative;
   flex: 1 1 auto;
 }
-.btn-group > .btn-check:checked + .btn,
+.btn-group > .btn-check:checked + .btn, .widget .search-form .btn-group > .btn-check:checked + .search-submit,
 .btn-group > .btn-check:focus + .btn,
+.widget .search-form .btn-group > .btn-check:focus + .search-submit,
 .btn-group > .btn:hover,
+.widget .search-form .btn-group > .search-submit:hover,
 .btn-group > .btn:focus,
+.widget .search-form .btn-group > .search-submit:focus,
 .btn-group > .btn:active,
+.widget .search-form .btn-group > .search-submit:active,
 .btn-group > .btn.active,
+.widget .search-form .btn-group > .active.search-submit,
 .btn-group-vertical > .btn-check:checked + .btn,
+.widget .search-form .btn-group-vertical > .btn-check:checked + .search-submit,
 .btn-group-vertical > .btn-check:focus + .btn,
+.widget .search-form .btn-group-vertical > .btn-check:focus + .search-submit,
 .btn-group-vertical > .btn:hover,
+.widget .search-form .btn-group-vertical > .search-submit:hover,
 .btn-group-vertical > .btn:focus,
+.widget .search-form .btn-group-vertical > .search-submit:focus,
 .btn-group-vertical > .btn:active,
-.btn-group-vertical > .btn.active {
+.widget .search-form .btn-group-vertical > .search-submit:active,
+.btn-group-vertical > .btn.active,
+.widget .search-form .btn-group-vertical > .active.search-submit {
   z-index: 1;
 }
 
@@ -3672,19 +3686,23 @@ textarea.form-control-lg {
 .btn-group {
   border-radius: var(--bs-border-radius);
 }
-.btn-group > :not(.btn-check:first-child) + .btn,
+.btn-group > :not(.btn-check:first-child) + .btn, .widget .search-form .btn-group > :not(.btn-check:first-child) + .search-submit,
 .btn-group > .btn-group:not(:first-child) {
   margin-left: calc(-1 * var(--bs-border-width));
 }
-.btn-group > .btn:not(:last-child):not(.dropdown-toggle),
+.btn-group > .btn:not(:last-child):not(.dropdown-toggle), .widget .search-form .btn-group > .search-submit:not(:last-child):not(.dropdown-toggle),
 .btn-group > .btn.dropdown-toggle-split:first-child,
-.btn-group > .btn-group:not(:last-child) > .btn {
+.widget .search-form .btn-group > .dropdown-toggle-split.search-submit:first-child,
+.btn-group > .btn-group:not(:last-child) > .btn,
+.widget .search-form .btn-group > .btn-group:not(:last-child) > .search-submit {
   border-top-right-radius: 0;
   border-bottom-right-radius: 0;
 }
-.btn-group > .btn:nth-child(n+3),
+.btn-group > .btn:nth-child(n+3), .widget .search-form .btn-group > .search-submit:nth-child(n+3),
 .btn-group > :not(.btn-check) + .btn,
-.btn-group > .btn-group:not(:first-child) > .btn {
+.widget .search-form .btn-group > :not(.btn-check) + .search-submit,
+.btn-group > .btn-group:not(:first-child) > .btn,
+.widget .search-form .btn-group > .btn-group:not(:first-child) > .search-submit {
   border-top-left-radius: 0;
   border-bottom-left-radius: 0;
 }
@@ -3700,12 +3718,12 @@ textarea.form-control-lg {
   margin-right: 0;
 }
 
-.btn-sm + .dropdown-toggle-split, .btn-group-sm > .btn + .dropdown-toggle-split {
+.btn-sm + .dropdown-toggle-split, .btn-group-sm > .btn + .dropdown-toggle-split, .widget .search-form .btn-group-sm > .search-submit + .dropdown-toggle-split {
   padding-right: 0.375rem;
   padding-left: 0.375rem;
 }
 
-.btn-lg + .dropdown-toggle-split, .btn-group-lg > .btn + .dropdown-toggle-split {
+.btn-lg + .dropdown-toggle-split, .btn-group-lg > .btn + .dropdown-toggle-split, .widget .search-form .btn-group-lg > .search-submit + .dropdown-toggle-split {
   padding-right: 0.75rem;
   padding-left: 0.75rem;
 }
@@ -3715,22 +3733,25 @@ textarea.form-control-lg {
   align-items: flex-start;
   justify-content: center;
 }
-.btn-group-vertical > .btn,
+.btn-group-vertical > .btn, .widget .search-form .btn-group-vertical > .search-submit,
 .btn-group-vertical > .btn-group {
   width: 100%;
 }
-.btn-group-vertical > .btn:not(:first-child),
+.btn-group-vertical > .btn:not(:first-child), .widget .search-form .btn-group-vertical > .search-submit:not(:first-child),
 .btn-group-vertical > .btn-group:not(:first-child) {
   margin-top: calc(-1 * var(--bs-border-width));
 }
-.btn-group-vertical > .btn:not(:last-child):not(.dropdown-toggle),
-.btn-group-vertical > .btn-group:not(:last-child) > .btn {
+.btn-group-vertical > .btn:not(:last-child):not(.dropdown-toggle), .widget .search-form .btn-group-vertical > .search-submit:not(:last-child):not(.dropdown-toggle),
+.btn-group-vertical > .btn-group:not(:last-child) > .btn,
+.widget .search-form .btn-group-vertical > .btn-group:not(:last-child) > .search-submit {
   border-bottom-right-radius: 0;
   border-bottom-left-radius: 0;
 }
-.btn-group-vertical > .btn:nth-child(n+3),
+.btn-group-vertical > .btn:nth-child(n+3), .widget .search-form .btn-group-vertical > .search-submit:nth-child(n+3),
 .btn-group-vertical > :not(.btn-check) + .btn,
-.btn-group-vertical > .btn-group:not(:first-child) > .btn {
+.widget .search-form .btn-group-vertical > :not(.btn-check) + .search-submit,
+.btn-group-vertical > .btn-group:not(:first-child) > .btn,
+.widget .search-form .btn-group-vertical > .btn-group:not(:first-child) > .search-submit {
   border-top-left-radius: 0;
   border-top-right-radius: 0;
 }
@@ -4769,7 +4790,7 @@ textarea.form-control-lg {
   display: none;
 }
 
-.btn .badge {
+.btn .badge, .widget .search-form .search-submit .badge {
   position: relative;
   top: -1px;
 }
@@ -6718,7 +6739,7 @@ textarea.form-control-lg {
   background-color: currentcolor;
   opacity: 0.5;
 }
-.placeholder.btn::before {
+.placeholder.btn::before, .widget .search-form .placeholder.search-submit::before {
   display: inline-block;
   content: "";
 }
@@ -20227,6 +20248,127 @@ h1, .h1, h2, .h2, h3, .h3, h4, .h4, h5, .h5, h6, .h6, blockquote, caption, figca
   content: "爛";
 }
 
+.widget .card-title,
+.widget .wp-block-heading {
+  margin-bottom: 0.75rem;
+}
+
+.widget ul,
+.widget ol {
+  list-style: none;
+  padding-left: 0;
+  margin-bottom: 0;
+}
+.widget ul li,
+.widget ol li {
+  padding: 0.5rem 1rem;
+  border-bottom: var(--bs-border-width) solid var(--bs-border-color);
+}
+.widget ul li:last-child,
+.widget ol li:last-child {
+  border-bottom: 0;
+}
+.widget ul li a,
+.widget ol li a {
+  text-decoration: none;
+}
+.widget ul li a:hover,
+.widget ol li a:hover {
+  text-decoration: underline;
+}
+
+.widget .card-body > ul,
+.widget .card-body > ol,
+.widget .card-body > nav > ul,
+.widget .card-body > .wp-block-group > ul,
+.widget .card-body > .wp-block-group > ol {
+  margin: 0 calc(-1 * var(--bs-card-spacer-x)) calc(-1 * var(--bs-card-spacer-y));
+}
+.widget .card-body > ul li:first-child,
+.widget .card-body > ol li:first-child,
+.widget .card-body > nav > ul li:first-child,
+.widget .card-body > .wp-block-group > ul li:first-child,
+.widget .card-body > .wp-block-group > ol li:first-child {
+  border-top: var(--bs-border-width) solid var(--bs-border-color);
+}
+
+.widget select {
+  display: block;
+  width: 100%;
+  padding: 0.375rem 0.75rem;
+  font-size: 1rem;
+  line-height: 1.5;
+  color: var(--bs-body-color);
+  background-color: var(--bs-body-bg);
+  border: var(--bs-border-width) solid var(--bs-border-color);
+  border-radius: var(--bs-border-radius);
+  appearance: auto;
+  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
+}
+.widget select:focus {
+  border-color: rgb(134, 182.5, 254);
+  outline: 0;
+  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
+}
+
+.widget .search-form {
+  display: flex;
+  gap: 0.5rem;
+}
+.widget .search-form .search-field {
+  flex: 1;
+  display: block;
+  width: 100%;
+  padding: 0.375rem 0.75rem;
+  font-size: 1rem;
+  line-height: 1.5;
+  color: var(--bs-body-color);
+  background-color: var(--bs-body-bg);
+  border: var(--bs-border-width) solid var(--bs-border-color);
+  border-radius: var(--bs-border-radius);
+}
+.widget .search-form .search-field:focus {
+  border-color: rgb(134, 182.5, 254);
+  outline: 0;
+  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
+}
+.widget .wp-block-search .wp-block-search__label {
+  display: none;
+}
+
+.widget .tagcloud {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.375rem;
+}
+.widget .tagcloud a {
+  display: inline-block;
+  padding: 0.25rem 0.5rem;
+  font-size: 0.875rem !important;
+  line-height: 1.5;
+  color: var(--bs-body-color);
+  background-color: var(--bs-tertiary-bg);
+  border: var(--bs-border-width) solid var(--bs-border-color);
+  border-radius: var(--bs-border-radius-pill);
+  text-decoration: none;
+  transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
+}
+.widget .tagcloud a:hover {
+  background-color: var(--bs-primary);
+  border-color: var(--bs-primary);
+  color: #fff;
+}
+
+.widget .post-date {
+  display: block;
+  font-size: 0.875em;
+  color: var(--bs-secondary-color);
+}
+
+.widget .recentcomments {
+  font-size: 0.875rem;
+}
+
 .wp-bootstrap-dark-mode-toggle {
   display: inline-flex;
   align-items: center;

functions.php

@@ -757,6 +757,12 @@ if ( ! function_exists( 'wp_bootstrap_block_styles' ) ) :
             'inline_style' => '
                 .is-style-separator-wide { max-width: none; }',
         ) );
+
+        // core/list - List Group (Bootstrap).
+        register_block_style( 'core/list', array(
+            'name'  => 'list-group',
+            'label' => __( 'List Group', 'wp-bootstrap' ),
+        ) );
     }
 endif;
 add_action( 'init', 'wp_bootstrap_block_styles' );
@@ -790,6 +796,40 @@ if ( ! function_exists( 'wp_bootstrap_init_templates' ) ) :
 endif;
 add_action( 'after_setup_theme', 'wp_bootstrap_init_templates' );
 
+/**
+ * Initialize block renderer for Bootstrap 5 class injection.
+ *
+ * Hooks per-block render_block filters to inject Bootstrap classes
+ * (e.g. .table, .btn, .img-fluid) into core block HTML on the frontend.
+ *
+ * @since 1.1.0
+ */
+if ( ! function_exists( 'wp_bootstrap_init_block_renderer' ) ) :
+    function wp_bootstrap_init_block_renderer() {
+        if ( class_exists( '\\WPBootstrap\\Block\\BlockRenderer' ) ) {
+            new \WPBootstrap\Block\BlockRenderer();
+        }
+    }
+endif;
+add_action( 'after_setup_theme', 'wp_bootstrap_init_block_renderer' );
+
+/**
+ * Initialize widget renderer for Bootstrap 5 card wrappers.
+ *
+ * Hooks dynamic_sidebar_params to wrap sidebar widgets in Bootstrap
+ * card components with proper heading structure.
+ *
+ * @since 1.1.0
+ */
+if ( ! function_exists( 'wp_bootstrap_init_widget_renderer' ) ) :
+    function wp_bootstrap_init_widget_renderer() {
+        if ( class_exists( '\\WPBootstrap\\Block\\WidgetRenderer' ) ) {
+            new \WPBootstrap\Block\WidgetRenderer();
+        }
+    }
+endif;
+add_action( 'after_setup_theme', 'wp_bootstrap_init_widget_renderer' );
+
 /**
  * Customize comment form fields with Bootstrap classes.
  *

inc/Block/BlockRenderer.php

@@ -0,0 +1,303 @@
+<?php
+/**
+ * Block Renderer.
+ *
+ * Injects Bootstrap 5 classes into WordPress core block HTML output
+ * on the frontend. Uses WP_HTML_Tag_Processor for safe HTML manipulation.
+ *
+ * @package WPBootstrap\Block
+ * @since   1.1.0
+ */
+
+namespace WPBootstrap\Block;
+
+use WP_HTML_Tag_Processor;
+use WP_Block;
+
+class BlockRenderer
+{
+    /**
+     * Map of WordPress preset color slugs to Bootstrap button variants.
+     */
+    private const COLOR_VARIANTS = [
+        'primary'   => 'primary',
+        'secondary' => 'secondary',
+        'success'   => 'success',
+        'danger'    => 'danger',
+        'warning'   => 'warning',
+        'info'      => 'info',
+        'light'     => 'light',
+        'dark'      => 'dark',
+    ];
+
+    /**
+     * Register render_block filters for each supported block type.
+     */
+    public function __construct()
+    {
+        if ( is_admin() || wp_doing_ajax() ) {
+            return;
+        }
+
+        if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
+            return;
+        }
+
+        $blocks = $this->getBlockHandlers();
+
+        /**
+         * Filters the map of block names to handler method names.
+         *
+         * Child themes can remove blocks or add new ones.
+         *
+         * @since 1.1.0
+         *
+         * @param array $blocks Map of 'core/block-name' => 'methodName'.
+         */
+        $blocks = apply_filters( 'wp_bootstrap_block_renderer_blocks', $blocks );
+
+        foreach ( $blocks as $blockName => $method ) {
+            if ( method_exists( $this, $method ) ) {
+                add_filter( "render_block_{$blockName}", [ $this, $method ], 10, 3 );
+            }
+        }
+    }
+
+    /**
+     * Get the default map of block names to handler methods.
+     *
+     * @return array<string, string>
+     */
+    private function getBlockHandlers(): array
+    {
+        return [
+            'core/table'     => 'renderTable',
+            'core/button'    => 'renderButton',
+            'core/buttons'   => 'renderButtons',
+            'core/image'     => 'renderImage',
+            'core/search'    => 'renderSearch',
+            'core/quote'     => 'renderQuote',
+            'core/pullquote' => 'renderPullquote',
+            'core/list'      => 'renderList',
+        ];
+    }
+
+    /**
+     * Add Bootstrap table classes.
+     *
+     * Injects .table on <table>; adds .table-striped when WP stripes style is active.
+     */
+    public function renderTable( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        if ( ! $processor->next_tag( 'table' ) ) {
+            return $content;
+        }
+
+        $processor->add_class( 'table' );
+
+        $className = $block['attrs']['className'] ?? '';
+        if ( str_contains( $className, 'is-style-stripes' ) ) {
+            $processor->add_class( 'table-striped' );
+        }
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add Bootstrap button classes.
+     *
+     * Injects .btn + color variant on .wp-block-button__link.
+     * Maps WP preset color slugs to Bootstrap btn-{variant} / btn-outline-{variant}.
+     */
+    public function renderButton( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        if ( ! $processor->next_tag( [ 'class_name' => 'wp-block-button__link' ] ) ) {
+            return $content;
+        }
+
+        $processor->add_class( 'btn' );
+
+        $attrs = $block['attrs'] ?? [];
+
+        // Gradient buttons: just .btn, inline style handles the color.
+        if ( ! empty( $attrs['gradient'] ) ) {
+            return $processor->get_updated_html();
+        }
+
+        $className = $attrs['className'] ?? '';
+        $isOutline = str_contains( $className, 'is-style-outline' );
+
+        if ( $isOutline ) {
+            $colorSlug = $attrs['textColor'] ?? 'primary';
+            $variant   = self::COLOR_VARIANTS[ $colorSlug ] ?? 'primary';
+            $processor->add_class( 'btn-outline-' . $variant );
+        } else {
+            $colorSlug = $attrs['backgroundColor'] ?? 'primary';
+            $variant   = self::COLOR_VARIANTS[ $colorSlug ] ?? 'primary';
+            $processor->add_class( 'btn-' . $variant );
+        }
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add Bootstrap flex utilities to button group wrapper.
+     */
+    public function renderButtons( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        if ( ! $processor->next_tag( [ 'class_name' => 'wp-block-buttons' ] ) ) {
+            return $content;
+        }
+
+        $processor->add_class( 'd-flex' );
+        $processor->add_class( 'flex-wrap' );
+        $processor->add_class( 'gap-2' );
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add .img-fluid to block images.
+     */
+    public function renderImage( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        if ( ! $processor->next_tag( 'img' ) ) {
+            return $content;
+        }
+
+        $processor->add_class( 'img-fluid' );
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add Bootstrap form-control and button classes to search block.
+     */
+    public function renderSearch( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        // Add .input-group to the inner wrapper for seamless input + button.
+        if ( $processor->next_tag( [ 'class_name' => 'wp-block-search__inside-wrapper' ] ) ) {
+            $processor->add_class( 'input-group' );
+        }
+
+        if ( $processor->next_tag( [ 'class_name' => 'wp-block-search__input' ] ) ) {
+            $processor->add_class( 'form-control' );
+        }
+
+        if ( $processor->next_tag( [ 'class_name' => 'wp-block-search__button' ] ) ) {
+            $processor->add_class( 'btn' );
+            $processor->add_class( 'btn-primary' );
+        }
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add Bootstrap blockquote classes to quote block.
+     */
+    public function renderQuote( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        if ( ! $processor->next_tag( 'blockquote' ) ) {
+            return $content;
+        }
+
+        $processor->add_class( 'blockquote' );
+
+        if ( $processor->next_tag( 'cite' ) ) {
+            $processor->add_class( 'blockquote-footer' );
+        }
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add Bootstrap blockquote classes to pullquote block.
+     */
+    public function renderPullquote( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        if ( ! $processor->next_tag( 'blockquote' ) ) {
+            return $content;
+        }
+
+        $processor->add_class( 'blockquote' );
+
+        if ( $processor->next_tag( 'cite' ) ) {
+            $processor->add_class( 'blockquote-footer' );
+        }
+
+        return $processor->get_updated_html();
+    }
+
+    /**
+     * Add Bootstrap list-group classes when list-group style is selected.
+     *
+     * Only modifies lists with the is-style-list-group block style.
+     */
+    public function renderList( string $content, array $block, ?WP_Block $instance = null ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        $className = $block['attrs']['className'] ?? '';
+
+        if ( ! str_contains( $className, 'is-style-list-group' ) ) {
+            return $content;
+        }
+
+        $processor = new WP_HTML_Tag_Processor( $content );
+
+        $listTag = ! empty( $block['attrs']['ordered'] ) ? 'ol' : 'ul';
+        if ( $processor->next_tag( $listTag ) ) {
+            $processor->add_class( 'list-group' );
+        }
+
+        while ( $processor->next_tag( 'li' ) ) {
+            $processor->add_class( 'list-group-item' );
+        }
+
+        return $processor->get_updated_html();
+    }
+}

inc/Block/WidgetRenderer.php

@@ -0,0 +1,115 @@
+<?php
+/**
+ * Widget Renderer.
+ *
+ * Transforms sidebar widget wrappers into Bootstrap 5 card components
+ * and adjusts block widget content (headings, lists) for Bootstrap styling.
+ *
+ * Card structure:
+ *   With title:    card → card-body → h4.card-title → content
+ *   Without title: card → card-body → content
+ *
+ * The title is placed inside card-body as a card-title. This avoids
+ * broken HTML when widgets omit the title (WordPress skips before_title
+ * and after_title entirely when there is no title to output).
+ *
+ * @package WPBootstrap\Block
+ * @since   1.1.0
+ */
+
+namespace WPBootstrap\Block;
+
+use WP_HTML_Tag_Processor;
+
+class WidgetRenderer
+{
+    /**
+     * Register filters for widget output transformation.
+     */
+    public function __construct()
+    {
+        if ( is_admin() || wp_doing_ajax() ) {
+            return;
+        }
+
+        if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
+            return;
+        }
+
+        add_filter( 'dynamic_sidebar_params', [ $this, 'wrapWidgetInCard' ] );
+        add_filter( 'widget_block_content', [ $this, 'processBlockWidgetContent' ], 10, 3 );
+    }
+
+    /**
+     * Restructure widget wrapper as a Bootstrap card.
+     *
+     * Uses card-body for all content with card-title for the heading.
+     * This structure works correctly whether or not the widget outputs a title.
+     *
+     * Note: WordPress runs sprintf on before_widget BEFORE this filter,
+     * so %1$s/%2$s are already replaced. We must use the processed values.
+     *
+     * @param array $params Sidebar parameters.
+     * @return array Modified parameters.
+     */
+    public function wrapWidgetInCard( array $params ): array
+    {
+        $widgetId     = $params[0]['widget_id'] ?? '';
+        $beforeWidget = $params[0]['before_widget'] ?? '';
+
+        // Extract widget-type classes (e.g. widget_block, widget_search)
+        // from the already-processed before_widget, skipping generic
+        // wrapper classes that we're replacing.
+        $widgetClasses = '';
+        if ( preg_match( '/class="([^"]*)"/', $beforeWidget, $matches ) ) {
+            $original = array_filter( explode( ' ', $matches[1] ) );
+            $skip     = [ 'widget', 'mb-4' ];
+            $kept     = array_diff( $original, $skip );
+            $widgetClasses = implode( ' ', $kept );
+        }
+
+        $params[0]['before_widget'] = sprintf(
+            '<div id="%s" class="card mb-3 widget %s"><div class="card-body">',
+            esc_attr( $widgetId ),
+            esc_attr( $widgetClasses )
+        );
+        $params[0]['after_widget']  = '</div></div>';
+        $params[0]['before_title']  = '<h4 class="card-title h6 text-uppercase fw-semibold">';
+        $params[0]['after_title']   = '</h4>';
+
+        return $params;
+    }
+
+    /**
+     * Process block widget content to downgrade h2 headings to h4.
+     *
+     * Block widgets render their headings as <h2 class="wp-block-heading">.
+     * Inside a sidebar card, h2 is too large — replace with h4 for proper
+     * visual hierarchy.
+     *
+     * @param string     $content  Widget block content.
+     * @param array      $instance Widget instance data.
+     * @param \WP_Widget $widget   Widget object.
+     * @return string Modified content.
+     */
+    public function processBlockWidgetContent( string $content, array $instance, \WP_Widget $widget ): string
+    {
+        if ( empty( $content ) ) {
+            return $content;
+        }
+
+        // Replace <h2 with <h4 and </h2> with </h4> for widget headings.
+        $content = preg_replace(
+            '/<h2(\s+class="[^"]*wp-block-heading[^"]*")/',
+            '<h4$1',
+            $content
+        );
+        $content = preg_replace(
+            '/<\/h2>/',
+            '</h4>',
+            $content
+        );
+
+        return $content;
+    }
+}

inc/Template/ContextBuilder.php

@@ -70,14 +70,19 @@ class ContextBuilder
             $context['sidebar'] = $this->getSidebarData();
         }
 
-        // Sidebar data for pages/posts using the "Page with Sidebar" template.
-        if (is_page() || is_singular('post')) {
+        // Sidebar data for pages using the "Page with Sidebar" template.
+        if (is_page()) {
             $slug = get_page_template_slug();
             if ($slug === 'page-sidebar') {
                 $context['sidebar'] = $this->getSidebarData();
             }
         }
 
+        // Posts always get sidebar data (sidebar is the default layout).
+        if (is_singular('post')) {
+            $context['sidebar'] = $this->getSidebarData();
+        }
+
         return $context;
     }
 

inc/Template/TemplateController.php

@@ -83,7 +83,11 @@ class TemplateController
         }
 
         if (is_singular('post')) {
-            return 'pages/single.html.twig';
+            $slug = get_page_template_slug();
+            return match ($slug) {
+                'page-full-width' => 'pages/single.html.twig',
+                default           => 'pages/single-sidebar.html.twig',
+            };
         }
 
         if (is_page()) {

src/scss/_widgets.scss

@@ -0,0 +1,145 @@
+// Widget Bootstrap 5 styling
+// Targets sidebar widget inner content rendered by WordPress core widgets.
+// Block widgets nest content inside .wp-block-group wrappers.
+
+// Widget headings (block widgets use h4.wp-block-heading after WidgetRenderer transform)
+.widget .card-title,
+.widget .wp-block-heading {
+    margin-bottom: $spacer * 0.75;
+}
+
+// Widget lists (Recent Posts, Archives, Categories, Recent Comments)
+// Covers both legacy (ul direct child) and block widget (ul inside .wp-block-group)
+.widget ul,
+.widget ol {
+    list-style: none;
+    padding-left: 0;
+    margin-bottom: 0;
+
+    li {
+        padding: $list-group-item-padding-y $list-group-item-padding-x;
+        border-bottom: var(--bs-border-width) solid var(--bs-border-color);
+
+        &:last-child {
+            border-bottom: 0;
+        }
+
+        a {
+            text-decoration: none;
+
+            &:hover {
+                text-decoration: underline;
+            }
+        }
+    }
+}
+
+// Flush lists to card edges (negate card-body padding)
+// Handles both direct children and block widget nesting (.wp-block-group > ul)
+.widget .card-body > ul,
+.widget .card-body > ol,
+.widget .card-body > nav > ul,
+.widget .card-body > .wp-block-group > ul,
+.widget .card-body > .wp-block-group > ol {
+    margin: 0 calc(-1 * var(--bs-card-spacer-x)) calc(-1 * var(--bs-card-spacer-y));
+
+    li:first-child {
+        border-top: var(--bs-border-width) solid var(--bs-border-color);
+    }
+}
+
+// Widget select dropdowns (Archives dropdown, Categories dropdown)
+.widget select {
+    display: block;
+    width: 100%;
+    padding: $input-padding-y $input-padding-x;
+    font-size: $input-font-size;
+    line-height: $input-line-height;
+    color: var(--bs-body-color);
+    background-color: var(--bs-body-bg);
+    border: var(--bs-border-width) solid var(--bs-border-color);
+    border-radius: var(--bs-border-radius);
+    appearance: auto;
+    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
+
+    &:focus {
+        border-color: $input-focus-border-color;
+        outline: 0;
+        box-shadow: $input-focus-box-shadow;
+    }
+}
+
+// Widget search form (legacy get_search_form() widgets)
+.widget .search-form {
+    display: flex;
+    gap: 0.5rem;
+
+    .search-field {
+        flex: 1;
+        display: block;
+        width: 100%;
+        padding: $input-padding-y $input-padding-x;
+        font-size: $input-font-size;
+        line-height: $input-line-height;
+        color: var(--bs-body-color);
+        background-color: var(--bs-body-bg);
+        border: var(--bs-border-width) solid var(--bs-border-color);
+        border-radius: var(--bs-border-radius);
+
+        &:focus {
+            border-color: $input-focus-border-color;
+            outline: 0;
+            box-shadow: $input-focus-box-shadow;
+        }
+    }
+
+    .search-submit {
+        @extend .btn;
+        @extend .btn-primary;
+    }
+}
+
+// Block search widget — hide label, make input-group flush
+.widget .wp-block-search {
+    .wp-block-search__label {
+        display: none;
+    }
+}
+
+// Tag cloud
+.widget .tagcloud {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.375rem;
+
+    a {
+        display: inline-block;
+        padding: 0.25rem 0.5rem;
+        font-size: $font-size-sm !important; // Override inline font-size from WP
+        line-height: 1.5;
+        color: var(--bs-body-color);
+        background-color: var(--bs-tertiary-bg);
+        border: var(--bs-border-width) solid var(--bs-border-color);
+        border-radius: var(--bs-border-radius-pill);
+        text-decoration: none;
+        transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
+
+        &:hover {
+            background-color: var(--bs-primary);
+            border-color: var(--bs-primary);
+            color: #fff;
+        }
+    }
+}
+
+// Post date in Recent Posts widget
+.widget .post-date {
+    display: block;
+    font-size: $small-font-size;
+    color: var(--bs-secondary-color);
+}
+
+// Recent Comments styling
+.widget .recentcomments {
+    font-size: $font-size-sm;
+}

src/scss/style.scss

@@ -18,5 +18,8 @@
 // 5. Bootstrap Icons
 @import "bootstrap-icons/font/bootstrap-icons";
 
-// 6. Custom styles
+// 6. Widget styles
+@import "widgets";
+
+// 7. Custom styles
 @import "custom";

style.css

@@ -7,7 +7,7 @@ Description: A modern WordPress Block Theme built from scratch with Bootstrap 5.
 Requires at least: 6.7
 Tested up to: 6.7
 Requires PHP: 8.3
-Version: 1.0.12
+Version: 1.1.0
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Text Domain: wp-bootstrap

views/pages/single-sidebar.html.twig

@@ -0,0 +1,57 @@
+{% extends 'base.html.twig' %}
+
+{% block content %}
+<div class="container">
+    <div class="row">
+        <div class="col-lg-8">
+            <article class="py-4">
+                <header class="mb-4">
+                    <h1>{{ post.title }}</h1>
+                    {% include 'partials/meta.html.twig' %}
+                </header>
+
+                {% if post.thumbnail %}
+                    <figure class="mb-4">
+                        <img src="{{ post.thumbnail }}" class="img-fluid rounded post-thumbnail"
+                             alt="{{ post.title|e('html_attr') }}"
+                             loading="lazy">
+                    </figure>
+                {% endif %}
+
+                <div class="post-content">
+                    {{ post.content|raw }}
+                </div>
+
+                {% if post.tags|length > 0 %}
+                    <div class="mt-4 mb-4">
+                        {% for tag in post.tags %}
+                            <a href="{{ tag.url }}" class="badge bg-secondary text-decoration-none me-1">
+                                {{ tag.name }}
+                            </a>
+                        {% endfor %}
+                    </div>
+                {% endif %}
+
+                {% include 'partials/post-navigation.html.twig' %}
+                {% include 'partials/comments.html.twig' %}
+            </article>
+
+            {% if more_posts is defined and more_posts|length > 0 %}
+                <section class="py-5 border-top">
+                    <h2 class="h4 mb-4">{{ __('More posts') }}</h2>
+                    <div class="row row-cols-1 row-cols-md-2 g-4">
+                        {% for post in more_posts %}
+                            <div class="col">
+                                {% include 'components/card-post-grid.html.twig' with {'post': post} only %}
+                            </div>
+                        {% endfor %}
+                    </div>
+                </section>
+            {% endif %}
+        </div>
+        <div class="col-lg-4">
+            {% include 'partials/sidebar.html.twig' %}
+        </div>
+    </div>
+</div>
+{% endblock %}