refac: styling

src/app.css

@@ -69,7 +69,7 @@ textarea::placeholder {
 }
 
 .input-prose-sm {
-	@apply prose dark:prose-invert prose-headings:font-medium prose-hr:my-4 prose-hr:border-gray-100 prose-hr:dark:border-gray-800 prose-p:my-1 prose-img:my-1 prose-headings:my-2 prose-pre:my-0 prose-table:my-0 prose-blockquote:my-0 prose-ul:my-1 prose-ol:my-1 prose-li:my-1 whitespace-pre-line text-sm;
+	@apply prose dark:prose-invert prose-headings:font-medium prose-h1:text-2xl prose-h2:text-xl prose-h3:text-lg prose-hr:my-4 prose-hr:border-gray-100 prose-hr:dark:border-gray-800 prose-p:my-1 prose-img:my-1 prose-headings:my-2 prose-pre:my-0 prose-table:my-0 prose-blockquote:my-0 prose-ul:my-1 prose-ol:my-1 prose-li:my-1 whitespace-pre-line text-sm;
 }
 
 .markdown-prose {