Increase font weight on navbar to improve readability

css/style.css

@@ -321,7 +321,7 @@ h1, h2, h3, h4, h5, h6 {
   display: inline-block;
   color: #fff;
   font-family: 'Raleway', sans-serif;
-  font-weight: 300;
+  font-weight: 500;
   font-size: 14px;
   outline: none;
 }