CAMEL-15202: fix blog post pagination design

This reintroduces the design we had before rebasing on the latest Antora
Default UI (#383). Now the changes are affecting only the blog section
and further rebases should not interfere with the pagination design.
diff --git a/antora-ui-camel/src/css/blog.css b/antora-ui-camel/src/css/blog.css
index 72aedf7..1466973 100644
--- a/antora-ui-camel/src/css/blog.css
+++ b/antora-ui-camel/src/css/blog.css
@@ -185,3 +185,41 @@
 .blog li ol {
   padding-bottom: 0;
 }
+
+.blog .pagination {
+  margin: var(--static-margin);
+  max-width: var(--static-max-width);
+  list-style: none;
+  padding: 1rem;
+}
+
+@media screen and (min-width: 1024px) {
+  .blog .pagination {
+    max-width: var(--static-max-width--desktop);
+  }
+}
+
+.blog .page-item {
+  display: inline;
+  padding: 0;
+  margin: 0;
+}
+
+.blog .page-item a {
+  color: var(--color-gray-30);
+  font-weight: bold;
+  padding: 0.5rem;
+}
+
+.blog .page-item.disabled a {
+  color: var(--color-gray-30);
+}
+
+.blog .page-item.active {
+  border-radius: 3px;
+  background: var(--color-asf-moderate-blue);
+}
+
+.blog .page-item.active a {
+  color: var(--color-white);
+}