Logo Licence and Brand Usage
============================

The refineGEMs source code is licensed under the MIT licence. The refineGEMs
logos are licensed separately under `Creative Commons Attribution 4.0
International <https://creativecommons.org/licenses/by/4.0/>`__ (CC BY 4.0).
The asset-side notice is stored next to the logo files in
``docs/source/images/logos/LOGO_LICENSE.md``.

When reusing the logo, include attribution such as:

  refineGEMs logo by the refineGEMs contributors, licensed under CC BY 4.0.

Approved Logo Assets
--------------------

Use the files in ``docs/source/images/logos/`` as the canonical project logos
for README files, documentation pages, presentations, and community material.
Use the logo(s) as supplied whenever possible.

Colours
-------

The approved logo palette is intentionally restrained:

.. list-table::
   :header-rows: 1

   * - Role
     - Colour
     - Hex
   * - Primary logo gold
     - muted warm gold
     - ``#B4A069``
   * - Light background
     - warm off-white
     - ``#F7F4EF``
   * - Neutral text
     - charcoal
     - ``#262626``
   * - Reverse background
     - white
     - ``#FFFFFF``

For project material, prefer the primary gold for logo strokes, accents, and
small highlights. Use neutral text colours for readability. Avoid recolouring
the logo into unrelated palettes unless a single-colour accessibility or
production constraint requires it.

Minimum Size
------------

Keep the logo large enough for the wordmark and arrows to remain legible:

* Digital use: at least ``120 px`` wide for the full logo.
* Small icon or favicon use: at least ``32 px`` wide.
* Print use: at least ``25 mm`` wide.

If the wordmark becomes hard to read, use a larger size or switch to a simpler
project mention in text.

Clear Space
-----------

Leave clear space around the logo equal to at least one eighth of the logo
diameter on all sides. Do not place text, badges, partner logos, or dense
graphics inside this area. More space is preferred on title slides, posters,
and documentation headers.

Acceptable Modifications
------------------------

You may:

* Scale the logo proportionally.
* Place the logo on white, warm off-white, or another calm high-contrast
  background.
* Export the logo to another raster format when required by a publishing
  system.
* Use a single-colour version in primary gold, black, or white when technical
  constraints require it.

Please avoid:

* Stretching, squashing, rotating, cropping, or redrawing the logo.
* Changing the relationship between the arrows, circular mark, and wordmark.
* Adding shadows, outlines, gradients, filters, or decorative effects.
* Placing the logo on busy backgrounds where the wordmark is difficult to read.
* Using the logo in a way that implies endorsement of an external project
  without permission from the refineGEMs maintainers.