PWA logo
Author: Diego Gonzalez (Diego González), 2017
Source: https://commons.wikimedia.org/wiki/File:PWA_logo.svg
Original asset: https://upload.wikimedia.org/wikipedia/commons/1/1f/PWA_logo.svg
License: Creative Commons Attribution-ShareAlike 4.0 International
https://creativecommons.org/licenses/by-sa/4.0/

The SVG file is distributed unchanged. The landing page displays it in white
using a CSS invert filter on a black button background.