diff --git a/templates/modulo.html b/templates/modulo.html
index 262c71b..b2c04d8 100644
--- a/templates/modulo.html
+++ b/templates/modulo.html
@@ -1,14 +1,31 @@
 <!doctype html>
-<html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
+    <title>Calcolo dell'area del rettangolo</title>
+  </head>
+    
   <body>
-    <title>Calcola l'area del rettangolo</title>
+    <h1>Calcola l'area del rettangolo</h1>
 
-    <p><form action="/area_rettangolo" method="post">
-      <label for="base">Lunghezza della base:</label>
-      <input type="text" name="base" /><br/>
-      <label for="altezza">Lunghezza dell'altezza:</label>
-      <input type="text" name="altezza" /><br/>
-      <input type="submit" name="Calcola" />
-    </form></p>
+    <p>
+      <form action="/area_rettangolo" method="post">
+	<div class="form-group row">
+	  <label for="base">Lunghezza della base:</label>
+	  <input type="text" name="base" class="form-control" />
+	</div>
+	<div class="form-group row">
+	  <label for="altezza">Lunghezza dell'altezza:</label>
+      	  <input type="text" name="altezza" class="form-control" />
+	</div>
+	<button type="submit" name="Calcola" class="btn btn-primary" />
+      </form>
+    </p>
+    <!-- Bootstrap scripts -->
+    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
+    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
+    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
   </body>
 </html>
