Vendor-prefixed -ms-high-contrast and -ms-high-contrast-adjust are deprecated

[carrythebanner]

The standardized forced-colors and forced-color-adjust CSS properties have been available for a while; the vendor-prefixed -ms-high-contrast and -ms-high-contrast-adjust versions predated those but are now being deprecated. (You can see a console warning in Edge v126 and later.)

We currently use both, but it should be safe to use only the standardized version here on out:

shift-docs/site/themes/s2b_hugo_theme/assets/css/custom.css

Line 91 in 9ed2e2a

@media (-ms-high-contrast: active), (forced-colors: active) {

https://blogs.windows.com/msedgedev/2024/04/29/deprecating-ms-high-contrast/