How can I make such animated buttons, only on html and css?

Question

css

I want to make buttons like in this video, it doesn't work at all, can anyone help?

Answer 1

You don't want to sit and adjust for free.
The principle is this - https://jsfiddle.net/webirus/5jhkezad/2/
In short, it became interesting to me.
https://jsfiddle.net/webirus/5jhkezad/3/
The shadow under the buttons is also possible, but one more container is needed.
This is already easy to implement, I will not cut further.