Messed up the CSS

Hello Everybody.

Today I was playing and trying to understand my CSS things and wanted to change the color of one plugin.

But, after that something happened with site.
The animation disappeared.

Please, somebody help
http://www.study-island.asia

https://wordpress.org/plugins/css/