Segment table — accessibility

Keyboard

The table is a real <table> with thead, tbody and tfoot, so screen readers announce rows, columns and headers.
Rows are not buttons: a row that opens something keeps its <tr> and the screen opts into keyboard operation (rowKeyboard), which adds tabIndex=0 and handles Enter and Space. That keeps the table semantics intact — a role="button" on a <tr> would destroy them.
The checkbox is a real <input type="checkbox">; the visible .ck box is its sibling, so Space toggles the selection from the keyboard.
Sorting is triggered from the header control; the per-column menu opens with Enter.

Header cells are <th>, so the column name is announced with every cell.
The select-all checkbox carries its own label; row checkboxes are labelled by the record (Vybrat Brno Tech a.s.).
The summary row is a <tfoot> of the same table, so its cells inherit the column headers.
Nothing announces that more rows were loaded as the user scrolled.

Rows and cells rely on the foundation ring from ds.css; the sheet sets outline: none only on text inputs inside the table chrome (search fields), never on rows or cells.
The checkbox has a custom ring: because the real input is visually hidden, the ring is drawn on the sibling box (input:focus-visible + .ck).
The frozen identity and checkbox columns stay in place while the table scrolls sideways, so a focused row never slides out of context.

Computed from packages/ui/src/tokens/tokens.css:

Cell text in ink on the table surface — above AA in both themes.
Muted column labels and secondary cells sit at --fg-muted = 2.85:1 light, 3.63:1 dark — below AA for text.
Selected row uses --selected as a fill; hover uses --hover-surface — both are non-text tints and are not the only carrier of state (the checkbox is).
The scroll shadow behind the frozen columns is decorative.

There is no empty state. A listing with no rows shows the header and nothing under it; the engine has no EmptyState fallback (a gap, not just a missing story).
Lazy loading is silent for assistive technology.
Muted cells and column labels sit below AA in light theme.
The column menu appears on hover, so on touch it is reachable only through the header control itself.