I'd like to use a hamburger menu in an email and have it working as it should in all desired clients except Gmail on some Android devices. I have tried and tried and simply can't get the top nav to display properly. Any suggestions? My project is here: http://codepen.io/Evangogh/pen/bWGqJb and a screenshot of the email in Gmail on a Samsung Note 5 is below. Thanks in advance for any tips!

Gmail on Android