pub const STANDARD_ITEM_SELECTION_EDGE_WIDTH: f32 = 1.0;Expand description
Border thickness drawn around a selected item (in the BorderRole::Focused
accent colour) even without keyboard focus. A non-color-alone, >= 3:1
boundary cue so selection is perceivable beyond the low-contrast
surface_selected wash (WCAG 1.4.1 Use of Color / 1.4.11 Non-text
Contrast). Thinner than the keyboard-focus ring so the two stay
distinguishable.