Update index.html

index.html

@@ -7,6 +7,7 @@
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@picocss/pico@1/css/pico.min.css">
     <style>
         .iframe-container {
+            height: calc(100vh - 200px);
             width: 100%;
             margin-top: 20px;
         }