Tweaked styling for demo page

web/demo/www/index.html

@@ -23,10 +23,11 @@
     }
 
     #main {
-      margin: 20px;
+      margin: 15px;
       width: 100%;
       height: 100%;
       align-self: center;
+      max-height: calc(100vh - 70px);
     }
 
     #nav {
@@ -44,7 +45,7 @@
       align-items: center;
       align-self: flex-start;
       color: white;
-      min-height: 50px;
+      min-height: 20px;
     }
 
     #title:hover {
@@ -55,7 +56,8 @@
     #title img
     {
       display: inline-block;
-      height: 45px;
+      height: 32px;
+      margin-top: 5px;
     }
 
     #file-picker {