Offline page redesign, remove brand showcase tab, force a11y/theme to bottom-right

- Offline page: full-viewport Joomla offline_image background, centered glass card
  overlay with logo glow, message, offline position, login accordion, copyright
- Favicon: added to offline page, HTML-escaped paths in helper
- Removed brand showcase tab, added footer CSS vars to CSS Variables tab
- Forced a11y toolbar and theme FAB to bottom-right (removed position selectors)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/language/en-GB/tpl_mokocassiopeia.ini

@@ -259,16 +259,14 @@ TPL_MOKOCASSIOPEIA_CSS_VARS_VM_DESC="<strong>Surfaces &amp; text</strong><br><co
 TPL_MOKOCASSIOPEIA_CSS_VARS_GABLE_LABEL="Gable"
 TPL_MOKOCASSIOPEIA_CSS_VARS_GABLE_DESC="Colour tokens used by the Gable extension.<br><code>--gab-blue</code> — <code>#0066cc</code><br><code>--gab-green</code> — <code>#28a745</code><br><code>--gab-red</code> — <code>#dc3545</code><br><code>--gab-orange</code> — <code>#fd7e14</code><br><code>--gab-gray1</code> — <code>#495057</code><br><code>--gab-gray2</code> — <code>#6c757d</code><br><code>--gab-gray3</code> — <code>#adb5bd</code>"
 
+TPL_MOKOCASSIOPEIA_CSS_VARS_FOOTER_LABEL="Footer"
+TPL_MOKOCASSIOPEIA_CSS_VARS_FOOTER_DESC="<strong>Spacing</strong><br><code>--footer-padding-top</code> — Top padding (default: <code>1rem</code>)<br><code>--footer-padding-bottom</code> — Bottom padding (default: <code>80px</code>)<br><code>--footer-grid-padding-y</code> — Grid vertical padding (default: <code>2.5rem</code>)<br><code>--footer-grid-padding-x</code> — Grid horizontal padding (default: <code>0.5em</code>)"
+
 ; ===== Theme Preview tab =====
 TPL_MOKOCASSIOPEIA_THEME_PREVIEW_FIELDSET_LABEL="Theme Preview"
 TPL_MOKOCASSIOPEIA_THEME_PREVIEW_INTRO="<p>Live preview of all CSS variables, hero variants, block colours, and Bootstrap components rendered with your active theme. Use the <strong>Toggle Light / Dark</strong> button inside the preview to switch modes. This page is also available as a standalone file at <code>templates/mokocassiopeia/templates/theme-test.html</code>.</p>"
 TPL_MOKOCASSIOPEIA_THEME_PREVIEW_FRAME="<iframe src='../templates/mokocassiopeia/templates/theme-test.html' style='width:100%;height:80vh;border:1px solid #dee2e6;border-radius:.375rem;' loading='lazy' title='Theme test sheet preview'></iframe>"
 
-; ===== Brand Showcase tab =====
-TPL_MOKOCASSIOPEIA_BRAND_SHOWCASE_FIELDSET_LABEL="Brand Showcase"
-TPL_MOKOCASSIOPEIA_BRAND_SHOWCASE_INTRO="<p>Interactive brand and Bootstrap 5 component showcase with colour system gradients. <strong>Hover over any gradient</strong> to sample the exact pixel colour at that point. Use the <strong>Toggle Light / Dark</strong> button to switch themes. This page is also available standalone at <code>templates/mokocassiopeia/templates/brand-showcase.html</code>.</p>"
-TPL_MOKOCASSIOPEIA_BRAND_SHOWCASE_FRAME="<iframe src='../templates/mokocassiopeia/templates/brand-showcase.html' style='width:100%;height:80vh;border:1px solid #dee2e6;border-radius:.375rem;' loading='lazy' title='Brand and Bootstrap showcase with colour sampler'></iframe>"
-
 ; ===== Misc =====
 MOD_BREADCRUMBS_HERE="YOU ARE HERE:"
 

src/language/en-US/tpl_mokocassiopeia.ini

@@ -259,16 +259,14 @@ TPL_MOKOCASSIOPEIA_CSS_VARS_VM_DESC="<strong>Surfaces &amp; text</strong><br><co
 TPL_MOKOCASSIOPEIA_CSS_VARS_GABLE_LABEL="Gable"
 TPL_MOKOCASSIOPEIA_CSS_VARS_GABLE_DESC="Color tokens used by the Gable extension.<br><code>--gab-blue</code> — <code>#0066cc</code><br><code>--gab-green</code> — <code>#28a745</code><br><code>--gab-red</code> — <code>#dc3545</code><br><code>--gab-orange</code> — <code>#fd7e14</code><br><code>--gab-gray1</code> — <code>#495057</code><br><code>--gab-gray2</code> — <code>#6c757d</code><br><code>--gab-gray3</code> — <code>#adb5bd</code>"
 
+TPL_MOKOCASSIOPEIA_CSS_VARS_FOOTER_LABEL="Footer"
+TPL_MOKOCASSIOPEIA_CSS_VARS_FOOTER_DESC="<strong>Spacing</strong><br><code>--footer-padding-top</code> — Top padding (default: <code>1rem</code>)<br><code>--footer-padding-bottom</code> — Bottom padding (default: <code>80px</code>)<br><code>--footer-grid-padding-y</code> — Grid vertical padding (default: <code>2.5rem</code>)<br><code>--footer-grid-padding-x</code> — Grid horizontal padding (default: <code>0.5em</code>)"
+
 ; ===== Theme Preview tab =====
 TPL_MOKOCASSIOPEIA_THEME_PREVIEW_FIELDSET_LABEL="Theme Preview"
 TPL_MOKOCASSIOPEIA_THEME_PREVIEW_INTRO="<p>Live preview of all CSS variables, hero variants, block colors, and Bootstrap components rendered with your active theme. Use the <strong>Toggle Light / Dark</strong> button inside the preview to switch modes. This page is also available as a standalone file at <code>templates/mokocassiopeia/templates/theme-test.html</code>.</p>"
 TPL_MOKOCASSIOPEIA_THEME_PREVIEW_FRAME="<iframe src='../templates/mokocassiopeia/templates/theme-test.html' style='width:100%;height:80vh;border:1px solid #dee2e6;border-radius:.375rem;' loading='lazy' title='Theme test sheet preview'></iframe>"
 
-; ===== Brand Showcase tab =====
-TPL_MOKOCASSIOPEIA_BRAND_SHOWCASE_FIELDSET_LABEL="Brand Showcase"
-TPL_MOKOCASSIOPEIA_BRAND_SHOWCASE_INTRO="<p>Interactive brand and Bootstrap 5 component showcase with color system gradients. <strong>Hover over any gradient</strong> to sample the exact pixel color at that point. Use the <strong>Toggle Light / Dark</strong> button to switch themes. This page is also available standalone at <code>templates/mokocassiopeia/templates/brand-showcase.html</code>.</p>"
-TPL_MOKOCASSIOPEIA_BRAND_SHOWCASE_FRAME="<iframe src='../templates/mokocassiopeia/templates/brand-showcase.html' style='width:100%;height:80vh;border:1px solid #dee2e6;border-radius:.375rem;' loading='lazy' title='Brand and Bootstrap showcase with color sampler'></iframe>"
-
 ; ===== Misc =====
 MOD_BREADCRUMBS_HERE="YOU ARE HERE:"