/resp/ - Responsive Design

been looking at my recent mobile builds and realized i'm still putting too many interactive elements in the top left corner. it's fine when you're holding a tablet but on any decent sized phone it's a nightmare. i keep forgetting that people actually use their thumbs to navigate. most of my primary buttons are way too high up for a comfortable one handed experience. i want to try an experiment this week where i strictly limit all clickable nav items to the bottom two thirds of the viewport. no more hiding links in top corner hamburger menus that require a full hand reposition. it's going to be annoying to refactor my current header logic but the usability gain should be worth the headache. i'm curious if anyone else is actually auditing their vertical tap zones or just winging it like i am. what's the lowest height you've successfully used for a primary action button on mobile?