Tacit is a CSS framework for dummies, who want their web services look attractive but have almost zero skills in graphic design, just like myself. This is how your website will look if you add just this code to your HTML: 

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" type="text/css"
      href="//yegor256.github.io/tacit/tacit.min.css"/>
  </head>
</html>

You should not use any CSS classes to make your HTML code look nice. Just make sure it is HTML5 compliant and you'll be fine. Again, no classes, just standard HTML elements, like <table> and <input>.

Check the source code of this page.

By the way, it is compliant with W3C validator requirements: HTML and CSS.

Forms

Here is a simple form:

Tables

A simple table would look like this:

Make Price Year
BMW X6 $75,000 2013
Mercedes-Benz E350 $52,700 2014

Work in progress

The framework is still in development. If you want to contribute, fork it and submit a pull request. Your help is always apprecitated.