Flexbox css

It was a really cool challenge. I didn't have any real problems except for the shape of the two purple elements on the sides. But I noticed a lot of problems on the browsers I use. For example on opera for mobile, the purple column on the right doesn't disappear, and on chrome, the clip-path of this same element doesn't work. If you have any ideas on how I could fix these problems, I would be glad to hear from you.