adjust post width to the same as main width; post content font size 16px

assets/css/common/post-single.css

@@ -30,6 +30,7 @@
 }
 
 .post-content {
+    font-size: 16px;
     color: var(--content);
 }
 
@@ -311,7 +312,7 @@ h6:hover .anchor {
 .toc.side {
     font-size: .8em;
 }
-@media screen and (min-width: 1440px) {
+@media screen and (min-width: 1350px) {
     .toc.side {
         position: fixed;
         top: 118px;

assets/css/core/theme-vars.css

@@ -3,7 +3,7 @@
     --content-gap: 20px;
     --nav-width: 960px;
     --main-width: 720px;
-    --post-width: 800px;
+    --post-width: 720px;
     --header-height: 60px;
     --footer-height: 80px;
     --radius: 8px;