Water.css is a drop-in collection of CSS styles to make simple websites like this just a little bit nicer.
Now you can write your simple static site with nice semantic html, and Water.css will manage the styling for you.
<!DOCTYPE html>
<html>
<head>
...
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/water.css@2/out/water.css">
...
</head>
...
</html>
This site is great to discover other classless CSS frameworks:
Commit: Classless style