У вашего броузера проблема в совместимости с HTML5
I'm a fan of minimlism in my designs, but since I stumbled across transform-style and some of the fun things that it opens up, I've been playing around a lot with some 3D stuff in CSS of late.
In this video I take a dive into how transform-style works in letting child elements stay in the 3D space instead of flat in their parent, as well as how you might want to use backface-visibility, as well as how we can transform things along the z-axis, which create these really cool effects.
CodePen: https://codepen.io/kevinpowell/pres/a60d44c86df49ed1baa3a0a230158885
Original Inspiration: https://freefrontend.com/css-flip-cards/
My article on transform-style: https://www.kevinpowell.co/article/transform-style/
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