/**
 * Strong, high-contrast keyboard focus indicator (WCAG 2.4.7 Focus Visible / 2.4.11 Focus Not Obscured (Minimum)).
 *
 * The layered white + accent ring keeps at least 3:1 contrast against both light and dark surfaces, since header,
 * footer and brand-specific backgrounds vary across FrontOffice modules. `outline` is kept (transparent in normal
 * rendering) so Windows High Contrast / forced-colors mode still renders a visible focus rectangle even though it
 * ignores `box-shadow`.
 */
:focus-visible {
    border-radius: 2px;
    box-shadow: 0 0 0 2px #ffffff, 0 0 0 5px #0b57d0;
    outline: 2px solid transparent;
    outline-offset: 2px;
}