We’ve now added a new default theme that works along with your phones settings. If your phone is in dark mode, you’ll see the site in dark. If it’s in normal, you’ll see the normal site. I suspect some users will see some issues as their devices clear cookies and so forth but once everything works its way it should work fine.
The taxi icon is a default setting that once I get some time I’ll see about switching it back to the older one. For the life of me I can’t remember what it was, so I may make it something else....besides a cab.