ZsgsDesign/NOJ ? reverse-engineered prompt

Build me a full online judge website for coding practice and contests, like a school programming judge.

I want users to be able to sign up, log in, reset passwords, verify email, browse problem sets, filter by tags, read problem details and solutions, submit code, and see their submission status with verdicts, code sharing, and download links. It should also have contests with countdowns, registration, contest problem pages, leaderboards, and an admin area for managing announcements and judging.

Please make the site feel complete, with a homepage, search across problems and users, dashboards for users, rankings, notifications, and a clean submission page that supports a few common languages. It should also handle both normal judging and virtual judge style submissions to external judges.

If you need to check current setup or docs online while building it, go ahead.