Radius

Every box has the same corner, --luz-radius-md (4px): buttons, fields with a full border, cards, alerts, menus, dialogs. It is the ceiling: no rectangle is rounder. --luz-radius-sm is for small marks (inline code, kbd, a checkbox, a thin bar) and for a row inside a rounded box, so the two corners stay concentric. --luz-radius-none is for a box that joins a neighbour, or a field drawn by its bottom edge only, such as the select and the text field.

--luz-radius-full is not a corner: it makes a pill or a circle, for shapes that are round by nature, such as the switch track and the count badge. A dot, a radio button or a slider thumb is a circle with 50%.