Add menu support in functions.php and add menu to header and mobile menu.
Build single.php
Install WP retina 2x for testing
Install WP retina 2x plugin.

Add wp_head hook and wp_footer hook in heade and foot for plugin to have something to grab hook into.
Create custom post type called 'case-study' to display work

Register in functions.php. Create page template called case-studies.php with wp-query loop to display the posts."
Style image captions
Make page title dynamic