Links reveal an underline via inset 0 -1px 0 #000, not text-decoration. The one accent is blue #0018a8, darkening to #051574 on hover; visited links can opt into #500550. Corners are near-square (0–2px), separated by 1px hairlines.
No content shadows — the only recorded shadows are a link underline (inset 0 -1px 0 #000) and a modal overlay. Motion is short (all 0.15–0.25s) with stepped easings (steps(1), steps(2)) for blink/marquee loaders; ships one reduced-motion block.