Good, modern and easy to use css for free.
To use Prealge CSS, simply paste the following code into the head of your website:
<link rel='stylesheet' href='https://prealge.github.io/css/style.css' crossorigin='anonymous'>
This CSS style sheet includes the following classes:
btn-primary
btn-danger
btn-continue
inp-primary
You can see examples of buttons and inputs benifitiing from Prealge CSS at https://prealge.github.io/css/
This project is still in progress. More classes will be added, and the style may change over time.