style: safe center home app

src/layouts/Layout.astro

@@ -64,26 +64,20 @@ const appTitle = article?.title ? `${article.title} | Cozy` : 'Cozy';
 </html>
 
 <style>
+
+  body {
+    display: grid;
+    place-content: safe center;
+  }
+
   #app-wrapper {
     width: 100%;
     max-width: 650px;
-    margin: 0 auto;
     padding: 0.5rem;
     padding-bottom: 5em;
 
-    /*
-    position: relative;
-    top: 50%;
-    transform: translateY(-50%);
-    */
 
     &:has(#router-outlet #post) {
-      /*
-      position: default;
-      top: 0;
-      transform: none;
-      */
-
       #jumbotron {
           display: none;
       }