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fix(ui): use native platform scrollbars instead of custom ::-webkit-scrollbar rules #230

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fix(ui): use native platform scrollbars instead of custom ::-webkit-scrollbar rules #230

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65 changes: 41 additions & 24 deletions web-app/src/index.css
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Original file line number Diff line number Diff line change
Expand Up @@ -187,34 +187,19 @@
stroke-width: 2;
}

/* Scrollbar styles */
::-webkit-scrollbar {
width: 8px;
height: 8px;
/*
* color-scheme must track the app's own theme class, not the OS,
* so native scrollbars and <select> dropdowns stay in sync with
* the UI regardless of the system appearance setting.
*/
:root {
color-scheme: light;
}

::-webkit-scrollbar-track {
background: transparent;
:root.dark {
color-scheme: dark;
}

::-webkit-scrollbar-thumb {
background: oklch(0.708 0 0 / 30%);
border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
background: oklch(0.708 0 0 / 50%);
}

.dark ::-webkit-scrollbar-thumb {
background: oklch(0.985 0 0 / 20%);
}

.dark ::-webkit-scrollbar-thumb:hover {
background: oklch(0.985 0 0 / 35%);
}

/* Firefox scrollbar */
* {
scrollbar-width: thin;
scrollbar-color: oklch(0.708 0 0 / 30%) transparent;
Expand All @@ -224,6 +209,38 @@
scrollbar-color: oklch(0.985 0 0 / 20%) transparent;
}

/* Fallback for engines that don't support scrollbar-color (e.g.
* older WebKitGTK or non-evergreen WebView2). Once ::-webkit-scrollbar
* is defined the browser opts out of native overlay scrollbars, so
* these rules only apply where the standards path isn't available. */
@supports not (scrollbar-color: auto) {
::-webkit-scrollbar {
width: 8px;
height: 8px;
}

::-webkit-scrollbar-track {
background: transparent;
}

::-webkit-scrollbar-thumb {
background: oklch(0.708 0 0 / 30%);
border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
background: oklch(0.708 0 0 / 50%);
}

.dark ::-webkit-scrollbar-thumb {
background: oklch(0.985 0 0 / 20%);
}

.dark ::-webkit-scrollbar-thumb:hover {
background: oklch(0.985 0 0 / 35%);
}
}

}

@layer base {
Expand Down