- shared view uses the bar, porthole and status band; outline gets its own
window on wide screens; j/k, gg/G, Ctrl-d/u scroll with a vim-style ruler
- rail doors are line icons in groups with hover tooltips and keycaps
- phone: number-only space pills, no nested rims, icon dock, toast messages,
back button and one-line meta in the document header
- keycaps (.kbd) wherever keys are shown, styled scrollbars in Chrome,
outline tracks position on jumps, breakpoints unified at 767px