[Unit]
Description=Run restic user backup once after login (10-30 min delay)

[Timer]
# OnStartupSec = time since the user's systemd session started (i.e. after login)
OnStartupSec=10min
# Add a random 0-20 min on top → fires 10-30 min after login
RandomizedDelaySec=1200
Unit=restic-backup.service

[Install]
WantedBy=timers.target