Make sure that Largo supports notched displays

[benlk]

Smartphone notches mess up padding and stuff. We should make sure Largo appears well on those screens.

• find info for iPhones: https://booking.design/how-we-adapted-the-booking-com-mobile-site-for-the-iphone-x-notch-e880fa00e989
• find info for Androids (does there need to be different Chrome/Firefox/Opera/Samsung solutions?)
• Figure out what needs to change, where
• Make those changes

[benlk]

This is what iPhones use: https://developer.mozilla.org/en-US/docs/Web/CSS/env https://css-tricks.com/css-environment-variables/