I noticed while using Cloudflare that the Login Mechanic can be a bit unintuitive at times.
When I am at the Landing Page and am not reading, I believe that the big orange button is the Sign Up button and the small button next to it is a Sign In Button. Which is made stronger by the fact that below the Sign-Up button is actually orange.
But what is most confusing is the page I get to once I press Sign Up by accident, instead of Sign in. It still looks and feels like a sign in page due to the similar minimalistic input you have to give.
I made that mistake now multiple times and would suggest to change it slightly to improve intuitivity.
This is just a small suggestion though!