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Fix: Add visible focus outlines for PDF viewer interactive elements #20162

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Fix: Add visible focus outlines for PDF viewer interactive elements #20162

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25 changes: 24 additions & 1 deletion web/viewer.css
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,9 @@
--doorhanger-icon-opacity: 0.9;
--doorhanger-height: 8px;

/* Accessibility variable for focus rings */
--focus-ring-outline: 2px solid #0a84ff;

--main-color: light-dark(rgb(12 12 13), rgb(249 249 250));
--body-bg-color: light-dark(rgb(212 212 215), rgb(42 42 46));
--progressBar-color: light-dark(rgb(10 132 255), rgb(0 96 223));
Expand Down Expand Up @@ -1058,8 +1061,28 @@ dialog :link {
height: auto;
}
}
}
/* ---- A11Y: strong keyboard focus ring for toolbar controls (WCAG 2.4.7) ---- */
.toolbarButton:focus-visible,
#secondaryToolbar .toolbarButton:focus-visible,
.toolbarField:focus-visible,
.dropdownToolbarButton:focus-visible,
.toolbarButtonWithContainer > .toolbarButton:focus-visible {
outline: var(--focus-ring-outline);
outline-offset: 2px;
box-shadow: none;
}

/* Windows High Contrast / Forced colors fallback */
@media (forced-colors: active) {
.toolbarButton:focus-visible,
#secondaryToolbar .toolbarButton:focus-visible,
.toolbarField:focus-visible,
.dropdownToolbarButton:focus-visible,
.toolbarButtonWithContainer > .toolbarButton:focus-visible {
outline: 2px solid CanvasText;
}
}
}
.toolbarButtonWithContainer {
height: 100%;
aspect-ratio: 1;
Expand Down