Begin responsiveness overhaul (#457)

Closes #435

components/Header.js

@@ -32,6 +32,13 @@ const Header = ({ enableHeroText }) => (
 
         h2 {
           text-align: center;
+          max-width: 80vw;
+        }
+
+        @media only screen and (max-width: 756px)  {
+          h2 {
+            font-size: 2.8vw;
+          }
         }
       `}
     </style>

components/style/Reset.js

@@ -146,7 +146,7 @@ export default () => (
         text-transform: initial;
         letter-spacing: initial;
         overflow-y: auto;
-        min-width: 848px;
+        /* min-width: 848px; */
         min-height: 704px;
       }