Open Design → Card & layout.
Looks: None (just the page), Frost (glass), Smoke (soft gradient), Float (deep shadow), Duotone (two accents blended), Brutal (thick border, hard shadow), Neon (glowing outline), Aurora (animated gradient border), Outline, Paper (light and flat).
Layouts: Stack (one column), Split (header left, links right on desktop), Cover (big banner, avatar overlapping), Wide (two columns of links on desktop).
Radius, border width, width (narrow, normal, wide) and opacity shape the card. Glow adds an accent halo, 3D tilt makes the card follow the pointer.