Align pagination and post navigation with wide layout

single.php

@@ -46,7 +46,13 @@
 			comments_template();
 		}
 
-		the_post_navigation();
+		// Wrap navigation titles so directional markers can remain un-underlined.
+		the_post_navigation(
+			array(
+				'prev_text' => '<span class="post-navigation-title">%title</span>',
+				'next_text' => '<span class="post-navigation-title">%title</span>',
+			)
+		);
 	}
 	?>
 </main>

style.css

@@ -651,9 +651,87 @@ h4 {
   font-family: "Berkeley Mono", monospace;
   font-size: 0.7rem;
 }
+/* Archive and search pagination follows the wide page-title alignment. */
+.pagination {
+  width: min(var(--wide), calc(100vw - 3rem));
+  max-width: none;
+  margin-left: 50%;
+  margin-right: 0;
+  transform: translateX(-50%);
+  font-size: 1rem;
+}
+
 .pagination .nav-links {
+  position: relative;
   display: flex;
+  width: 100%;
+  min-height: 1.8em;
   gap: 0.8rem;
+  align-items: center;
+  justify-content: center;
+}
+
+/* Keep the numbered sequence centered independently of the available directional links. */
+.pagination .prev,
+.pagination .next {
+  position: absolute;
+  top: 0;
+}
+
+.pagination .prev {
+  left: 0;
+}
+
+.pagination .next {
+  right: 0;
+}
+
+/* Previous/next article navigation uses the same wide treatment as archive pagination. */
+.post-navigation {
+  width: min(var(--wide), calc(100vw - 3rem));
+  max-width: none;
+  margin-left: 50%;
+  margin-right: 0;
+  transform: translateX(-50%);
+  font-size: 1rem;
+}
+
+.post-navigation .nav-links {
+  display: flex;
+  width: 100%;
+  gap: 1rem;
+}
+
+.post-navigation .nav-next {
+  margin-left: auto;
+  text-align: right;
+}
+
+/* Keep link decoration on the title only, leaving the directional markers clean. */
+.post-navigation a {
+  text-decoration: none;
+}
+
+.post-navigation .post-navigation-title {
+  text-decoration-line: underline;
+  text-decoration-thickness: 0.08em;
+  text-underline-offset: 0.14em;
+}
+
+.post-navigation .nav-previous a::before,
+.post-navigation .nav-next a::after {
+  color: var(--accent);
+  font-size: 1.1em;
+}
+
+.post-navigation .nav-previous a::before {
+  margin-right: 0.5em;
+  content: "◂";
+}
+
+.post-navigation .nav-next a::after {
+  margin-left: 0.5em;
+  content: "▸";
 }
 .page-numbers {
   padding: 0.25rem;