Category: CSS

Control whether width includes padding/border via box-sizing.

Change layout modes with display: block, flex, grid, none, and more.

Compare px, %, em, and rem for sizing and typography.

Size with vw, vh, vmin, vmax and modern svh/dvh when needed.

Understand content, padding, border, and margin.

Create outer spacing with margin (including auto centering).

Round corners with border-radius (including elliptical radii).

Control sizing with width, height, min/max constraints.

Choose absolute and relative units intentionally.

Style generated fragments with ::before, ::after, ::placeholder, and ::selection.