CSS3

How it works

CSS rules select parts of an HTML document and describe their presentation. Flexible layout systems arrange elements, while media queries adapt the design to available space or user preferences. Shared values keep colors and spacing consistent. Modern CSS evolves through separate modules rather than one single version number.

What you can build

Create responsive page layouts, reusable visual themes, interface animations, and consistent styling across a website.

• Adaptive content layout

  Arrange cards, navigation, and text so they reflow as available width changes, keeping the content usable without maintaining a separate mobile website.

• Reusable visual system

  Define shared spacing, colors, typography, and interaction states so new pages look consistent and a design update can reach multiple components together.

Things to consider

Good styling follows the content and supports zoom, keyboard focus, and reduced motion. Test real layouts across screen widths rather than relying only on breakpoints.