Category: CSS

Document intent with `/* comments */`.

Use named colors, hex, rgb/rgba, hsl/hsla, and modern color spaces.

Set background-color, images, position, size, and multiple layers.

Draw borders with width, style, and color per side.

Style states like :hover, :focus, :nth-child, and :is().

Reuse styles with `.class-name` selectors.

Target a unique element with `#id`.

Select by attribute presence or value patterns.

Combine selectors with descendant, child, sibling combinators.

Compare inline, internal, and external CSS approaches.