The idea
Everything at once, described entirely in flow-relative terms. Match all five elements: the card itself, the avatar, the two lines of text and the button.
The card is centred with margin-inline: auto, the avatar is centred inside it, and every gap is margin-block or padding-inline/padding-block.
Physical width/height/margin-*/padding-* are all off-limits — every size and gap must be flow-relative.