CSS<p><strong>CSS</strong> is the stylesheet language used to control web layout, typography, colors, responsive behavior, and visual presentation for web and interface development.</p> <p><strong>Additional Resources</strong>:</p> <ul> <li><a href="https://developer.mozilla.org/en-US/docs/Web/CSS">MDN CSS</a></li> <li><a href="https://www.w3.org/Style/CSS/">W3C CSS</a></li> <li><a href="https://www.w3.org/Style/CSS/specs.en.html">CSS specifications</a></li> </ul>