Botanical theme fern: Fern1 (PSF), Pearson Scott Foresman.
Released into the public domain worldwide by the author.
Source and permission: https://commons.wikimedia.org/wiki/File:Fern1_(PSF).png
Original file: https://upload.wikimedia.org/wikipedia/commons/b/b6/Fern1_%28PSF%29.png
The original PNG is bundled without alteration; the interface uses CSS tinting and positioning.
The U4 interface, line geometry and fractal renderer are original project assets.

LEADR-inspired control theme: original CSS skin; LEADR interface referenced at https://tuffnerds.net/leadr/. No Tuff Nerds artwork or software is bundled.
Press Start 2P font: Copyright 2012 The Press Start 2P Project Authors, SIL Open Font License 1.1. Full license: fonts/OFL-PressStart2P.txt.
