You have a form and you want to style it quickly, then, Form framework is for you. It is a single class form framework. Add the class form to any form element and you will get a modernly styled form input. It also packed with normalize CSS and light CSS reset. The framework CSS file size is only 17.4 KiB and 10.3 KiB for the minified version.
You can visit the documentation to see how you can use it.
Form is open-sourced software licensed under the MIT license.