Semantic HTML:
Using the correct HTML tags for their intended purposes, like <header>, <footer>, and <main>. Semantic HTML improves both accessibility and SEO.

CSS Variables:
Also known as CSS Custom Properties, CSS variables allow you to reuse values throughout your stylesheets and make updating styles easier.

Web Accessibility:
Dive into how to build websites that are accessible to everyone. Explore tools like WCAG Guidelines (Web Content Accessibility Guidelines) for practical tips on accessible web design.

CSS Animations:
Learn how to create interactive animations using CSS properties like @keyframes and transitions.