Your lookups stay inside the tunnel.
A VPN that connects but leaves your DNS where it was is a leak that looks like success — Litora does not do that.
The mechanism
Every gateway runs its own recursive resolver — answering from the root, never forwarding to a big public one — and query logging is off.
One edge to know about
DNSSEC validation is on, so a site with broken DNSSEC will not resolve — that is protection from a forged answer, not an outage.