diff --git a/frontend/pages/app.html b/frontend/pages/app.html
index 70890e7..0ea4b89 100644
--- a/frontend/pages/app.html
+++ b/frontend/pages/app.html
@@ -3,11 +3,22 @@
   <head>
     <meta charset="utf-8" />
     <title>Fast Sandbox</title>
+    <link
+      rel="stylesheet"
+      href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css"
+      integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk"
+      crossorigin="anonymous"
+    />
     <link rel="stylesheet" href="/css/app.css" />
     <script src="/js/app.js" async defer></script>
   </head>
   <body>
-    <div id="editor" class="column"></div>
-    <div id="terminal" class="column"></div>
+    <div id="header">
+      <button type="button" class="btn btn-success" id="runButton">Run</button>
+    </div>
+    <div id="app">
+      <div id="editor" class="column"></div>
+      <div id="terminal" class="column"></div>
+    </div>
   </body>
 </html>
diff --git a/frontend/styles/app.css b/frontend/styles/app.css
index ac4e3d7..ea93b76 100644
--- a/frontend/styles/app.css
+++ b/frontend/styles/app.css
@@ -3,6 +3,20 @@ body {
   height: 100vh;
 }
 
+#header {
+  height: 50px;
+  padding: 5px;
+}
+
+#runButton {
+  position: absolute;
+  left: 50%;
+}
+
+#app {
+  height: calc(100% - 50px);
+}
+
 .column {
   width: 50%;
   height: 100%;
