Mobile: center pinned post, pagination fixes, minor layout tweaks

- First (pinned) post on mobile: title and image centered
- Pagination: restored page counter on mobile, buttons above footer
- Typography and layout minor improvements

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

static/css/copyright-visible.css

@@ -1,33 +1,21 @@
-/* Улучшение видимости copyright текста */
+/* Copyright */
 #copyright {
     opacity: 1 !important;
-    color: rgba(255, 255, 255, 0.8) !important;
-    font-weight: 600 !important;
-    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5) !important;
-    background: rgba(0, 0, 0, 0.3) !important;
-    padding: 10px 20px !important;
-    border-radius: 5px !important;
-    backdrop-filter: blur(5px) !important;
-    text-align: center !important;
-}
-
-#copyright ul {
-    margin: 0 !important;
-    padding: 0 !important;
-    list-style: none !important;
-}
-
-#copyright li {
-    display: inline-block !important;
-    margin: 0 5px !important;
-    color: rgba(255, 255, 255, 0.9) !important;
-}
-
-#copyright li:after {
-    content: " | " !important;
     color: rgba(255, 255, 255, 0.6) !important;
+    font-weight: 400 !important;
+    text-shadow: none !important;
+    background: none !important;
+    padding: 0 !important;
+    border-radius: 0 !important;
+    backdrop-filter: none !important;
 }
 
-#copyright li:last-child:after {
+/* Убираем ::after — у темы уже есть border-left */
+#copyright li:after {
     content: "" !important;
+}
+
+#copyright ul li {
+    color: rgba(255, 255, 255, 0.6) !important;
+    border-left-color: rgba(255, 255, 255, 0.2) !important;
 }