Mahjong Tile Graphics — Creative Commons Attribution-ShareAlike 4.0 International
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The mahjong tile artwork in this directory (the contents of
assets/mahjong/raw/*) is licensed under CC BY-SA 4.0.

    https://creativecommons.org/licenses/by-sa/4.0/
    https://creativecommons.org/licenses/by-sa/4.0/legalcode

Attribution chain
-----------------

    Original artwork:
        Cangjie6
        https://commons.wikimedia.org/wiki/Category:Mahjong_tiles

    Compiled asset pack:
        DemChing — "Mahjong" (itch.io, 167 tiles)
        https://demching.itch.io/mahjong

    Modifications by trysolitaire.com:
        - Colour-theme body variants (raw/tile/00..05)
        - Run-time CSS brightness filter for dark-mode themes
          (--tile-dim custom property; see css/mahjong.css)

Per CC BY-SA 4.0, any stored derivative (e.g. pre-rendered dark-variant
images) must also be distributed under CC BY-SA 4.0 and note the changes
made. Live CSS render-time transforms applied to the original files are
not stored derivatives and do not trigger a separate license obligation.

Summary of terms (non-binding summary — the legal code linked above governs)
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    Share    — copy and redistribute in any medium or format
    Adapt    — remix, transform, and build upon, for any purpose,
               including commercially

    Under the following terms:

    Attribution  — credit must be given, a link to the license provided,
                   and any changes indicated
    ShareAlike   — contributions built on these must be distributed under
                   the same license
    No additional restrictions