Mobile version doesn’t show well

Hi there,

My mobile version seems to not show well (within wordpress itself and on my android phone). There are a few weird things

1. half of the screen is white. (as if my mobile screen is half the size)
2. on phone the menu-bar doesnt stick to the top, it comes down a bit.
3. the hamburger sign and the ‘share’ sign on top of the menu overlap each other on mobile device.

Please let me know what I can do.

Thanks.

The page I need help with: [log in to see the link]