Darker dark mode and a refreshed UI

New

Jumpstart Pro got a visual refresh!

Darker dark mode with true dark backgrounds instead of grays.
Updated buttons with a larger radius, subtle inset shadow, new borders, and focus styles. btn-light has been removed.
Cleaner layouts with tighter spacing, pricing in the left nav, and CSS grid pricing tables.
The account menu now links to "Manage accounts".

This touched a lot of views, so if you've overridden any of them it's a good time to compare against the new versions.