I am seeking input as to what I should set my mobile breakpoint(s) to. I have a photography website with a 380px width set for my old Muse site but I am seeing people use 480px for a responsive site, while others suggest 320px. At present, I am configuring the new site with breakpoints at 768, 968 and 1200. For mobile, should I just go with the minimum of 320px? The site will be created for HiDPI if that makes a difference at all. Thoughts?