Corner radius
Four radii, plus one exception: letters use a 3px paper corner (rounded-[3px]). Values are at the site’s 18px root.
Default · 4.5px
roundedButtons, cards, inputsmd · 6.75px
rounded-mdBadges, images and media tiles, podcast coversxl · 13.5px
rounded-xlCTA panels and large feature boxesfull · 9999px
rounded-fullAvatars and round icon buttons onlyrounded-sm and rounded-lg are retired: use Default or md for small surfaces, xl for panels. Pill shapes (rounded-full) are only for avatars and round icon buttons — not for badges, tags or buttons.
Shadows
Shadows are for things that float or images that need to lift off the page. Cards and panels don’t get them. Letters have their own soft paper shadow (see Boxes & Cards).
shadow-smInputs and small raised controlsshadow-mdDropdowns and tooltipsshadow-lgFloating UI (sticky CTA, page nav) and lettersshadow-3xlPhotos, video and podcast artshadow-4xlMedia on hovershadow-5xlLarge hero mediashadow-sm through shadow-xl are tinted warm to match the neutrals. shadow-3xl through shadow-5xl fall down and to the left, as if lit from the upper right, so photos look like prints on a table. The old float1–float4 shadows are retired.