(config question, not a bug) Config: default + Safari 14 support

I have a hard time with configuration. I went ahead with the default config but found rendering bugs in older Safari. So I'd like to support Safari >= 14 in addition to the default config. How do I go about that?

Seems like if I specify Safari using browserlist, all the smart lightningcss defaults go out the window and I'm in charge. So in effect specifying a target Safari >= 14 all the other browser tweaks are gone. No matter how I played with the browser targets (like last 2 versions, not dead) I couldn't match the defaults (e.g. various vendor prefixes are gone.) And I have a hard time finding what these defaults are. I'd like to be able to say "you do you but also support old safari" and can't figure out how to do it. I tried the concept of Features but even if I turn off all the features I still don't get the result I need.

From my cursory understanding the support is setup based on browser version during build time plus additional feature tweaking. I'd love to update the former without losing the latter

BTW, the Safari parts I'd love to have back in the output are due to its lack of support for

• width>=0 (as opposed to min-width: 0)
• text-decoration shorthand, e.g. text-decoration: underline dashed (I need -webkit-text-decoration)

Start with scripts/build-prefixes.js, especially the browser-version setup around lines 33 and 160. Compare the default configuration with a Safari >=14 target and check how the feature tweaks and vendor-prefix decisions differ. Done means the configuration can add older Safari support while retaining the default compatibility behavior, including the requested prefixes.