W3•CSS
Front End CSS Framework by W3 Schools.
To get started, just link to the CSS file.
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/4.15/w3.css">
Other available files are...
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-2021.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-camo.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-flat.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-food.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-highway.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-ios.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-metro.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-safety.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-signal.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-vivid.css">
<link rel="stylesheet" type="text/css" href="https://w3css.storage.dah5.com/w3-colors-win8.css">