Retro CSS Buttons

One of the design goals was when you saw it you wanted to (c)lick it

Examples:

https://codepen.io/simeydotme/pen/MWXxKrP
https://bt.ht/posts/aui/
https://girliemac.com/blog/2009/04/30/css3-gradients-no-image-aqua-button/