use Roboto font from Google Fonts

src/index.html

@@ -6,6 +6,7 @@
  		<meta name="viewport" content="width=device-width, initial-scale=1.0">
         <link rel="stylesheet" type="text/css" href="styles.css"/>
         <link rel="shortcut icon" href="favicon.ico" type="image/x-icon"/>
+        <link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
 		<title>Public APIs</title>
 	</head>
 	<header>

src/styles.css

@@ -1,6 +1,6 @@
 body {
     border-collapse: collapse;
-    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
+    font-family: 'Roboto', sans-serif;
     text-align: center;
     width: 100%;
 }