Shared shell classes

These classes are used across shell surfaces. They are separate from generic Knave UI selectors.

Selector	What it targets
.knave-shell	A root element wrapped by the shared shell styling helper.
.shell-light, .shell-dark	The root’s selected light or dark scheme.
.shell-structure	A structural panel in shell compositions.
.shell-overlay	A structural overlay root.
.shell-control	Shared control elements in surfaces that assign it.
.shell-text	Shared text elements in surfaces that assign it.
.shell-muted	Shared secondary text in surfaces that assign it.
.shell-card	A shared card, including the tray menu panel.
.high-contrast	Added to Quick Settings and notification roots when high contrast is active.
.keyboard-focus-visible	Added to the notification close control when keyboard focus is visible.

Structural roots can cover the whole output. The bundled shell stylesheet makes .shell-structure and .shell-overlay transparent; setting a background on one can paint over a much larger area than a visible dialog or panel. Prefer a surface-specific panel class when changing a panel’s background.

The shared root classes are assigned by the shell styles helper. Other classes are assigned by individual surface compositions.