Update app.py

app.py

@@ -68,10 +68,12 @@ body {
   border-radius: 16px;
   padding: 1.5rem 2rem;
   margin: 2rem 0;
-  width: fit-content;
+  width: 100%;
+  max-width: 700px;
   text-align: left;
-  margin-left: 3rem;
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+  margin-left: auto;
+  margin-right: auto;
 }
 
 #title-container h1 {
@@ -82,7 +84,7 @@ body {
 }
 
 #title-container .subtitle {
-  font-size: 1.4rem;
+  font-size: 1.1rem;
   font-family: 'Noto Sans', sans-serif;
   color: #222 !important;
   margin-top: 0.5rem;