Use OpenSans for the reading font

assets/css/index.css

@@ -4,11 +4,16 @@
     src: url(/assets/fonts/Roboto-Regular.ttf)
 }
 
+@font-face {
+    font-family: overpass;
+    src: url(/assets/fonts/OpenSans-Regular.ttf)
+}
+
 /* Element styling */
 html {
     background-color: #212121;
     color: #ffffff;
-    font-family: Roboto;
+    font-family: Overpass;
 }
 
 footer {
@@ -16,6 +21,7 @@ footer {
 }
 
 h1, h2, h3 {
+    font-family: Roboto;
     margin-bottom: 2px;
 }