Adjust spacing between article paragraphs and subheadings

Update `mt-8 mb-4` to `mt-6 mb-2` for subheadings and `mb-5` to `mb-3` for paragraphs in Article.tsx to reduce vertical spacing.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 069d4324-6c40-4355-955e-c714a50de1ea
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/3df548ff-50ae-432f-9be4-25d34eccc983/069d4324-6c40-4355-955e-c714a50de1ea/DGb2VKl

.replit

@@ -30,6 +30,10 @@ externalPort = 3003
 localPort = 43349
 externalPort = 3000
 
+[[ports]]
+localPort = 46881
+externalPort = 4200
+
 [env]
 PORT = "5000"
 

client/src/pages/Article.tsx

@@ -200,14 +200,14 @@ export default function Article() {
                   return (
                     <h3 
                       key={index} 
-                      className="text-xl font-bold mt-8 mb-4 text-gray-900"
+                      className="text-xl font-bold mt-6 mb-2 text-gray-900"
                     >
                       {part.content}
                     </h3>
                   );
                 }
                 return (
-                  <p key={index} className="mb-5 whitespace-pre-wrap">
+                  <p key={index} className="mb-3 whitespace-pre-wrap">
                     {part.content}
                   </p>
                 );