Print Peekaboo — Opt‑in, zero‑JS

Open Print Preview (Ctrl+P/Cmd+P) to see a small friendly note at bottom‑right. Close preview to revert.

Copy‑ready link tag:

<link rel="stylesheet" href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/variants/print-peekaboo/print-peekaboo.css" integrity="sha256-+dytakdA3xFgzomIdWvLyHcISmLDc1F+jfJugn65ghk=" crossorigin="anonymous" media="print">