:root{
--radius-0:0;          /* numbox, toggle, dropdown, textbox — square by design */
--radius-sm:2px;       /* fader + meter track, progress bars */
--radius-3:3px;        /* meter bank selector chips */
--radius-4:4px;        /* meter bank shell, inc/dec numbox, focus ring box */
--radius-5:5px;        /* canvas coordinate readout */
--radius-6:6px;        /* canvas floating toolbar */
--radius-lg:8px;       /* Button1, section cards, toasts, modals */
--radius-xl:12px;      /* large overlays */
--radius-pill:999px;   /* marketing capsule badges only */
--radius-app-icon:22.4%; /* @kind radius — app-icon squircle from the master */
}