Update default styles and templates

Remove hero section styles
Add CSS reset and variables
Improve typography and layout
Update base template with CSS versioning
Restructure list templates with semantic HTML
Add proper container classes
Improve code organization and readability

app/default/templates/list.php

@@ -1,25 +1,27 @@
 <?php if (!empty($pageContent)): ?>
-<div class="list-intro">
+<article class="list-intro">
 	<?= $pageContent ?>
-</div>
+</article>
 <?php endif; ?>
 
-<div class="list">
+<section>
 	<?php foreach ($items as $item): ?>
 	<article class="list-item">
 		<?php if (!empty($item['cover'])): ?>
-		<img src="<?= htmlspecialchars($item['cover']) ?>" alt="">
+		<a href="<?= htmlspecialchars($item['url']) ?>">
+			<img src="<?= htmlspecialchars($item['cover']) ?>" alt="">
+		</a>
 		<?php endif; ?>
-		
+
 		<h2><a href="<?= htmlspecialchars($item['url']) ?>"><?= htmlspecialchars($item['title']) ?></a></h2>
-		
+
 		<?php if (($metadata['show_date'] ?? true) && !empty($item['date'])): ?>
 		<time><?= htmlspecialchars($item['date']) ?></time>
 		<?php endif; ?>
-		
+
 		<?php if (!empty($item['summary'])): ?>
 		<p><?= htmlspecialchars($item['summary']) ?></p>
 		<?php endif; ?>
 	</article>
 	<?php endforeach; ?>
-</div>
+</section>