Shibuya

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- **Breaking**: ``--sy-rc-theme`` CSS variable has been removed in favor of :ref:`accent-colors`.
- **Breaking**: Several CSS variable names are changed.
- **Breaking**: ``light_css_variables`` and ``dark_css_variables`` theme option has been removed.
- **New**: Added many pre-defined :ref:`accent-colors`.
- **New**: Added style for ``sphinx-gallery`` and ``xarray``, via :issue:`20`.
- **New**: Added **simple** and **landing** layout templates.
- **New**: Added two image containers.
- **Fix**: Improve style for ``sphinx-design``, ``jupyter-sphinx``, and etc.
- **Fix**: Improve style for search page.

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- Add ``gitlab_url`` and ``bitbucket_url``
- Update Twitter icon to X icon
- Integrate with numpydoc extension
- Improve CSS for ``sphinx.ext.autosummary`` extension
- Add ``light-only`` and ``dark-only`` class

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- Fix deprecated links in relations.html and searchbox.html

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- Improve sidebar CSS for compatibility
- Add an alias template of ``localtoc.html``
- Add deprecated warning templates of ``relations.html`` and ``searchbox.html``
- Improve CSS for ``nbsphinx`` extension
- New feature for global TOC configuration
- Improve CSS for global TOC

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- Remove current ``hreflang`` link
- Fix nested TOC links, via :issue:`7`
- Use theme color for code blocks, via :issue:`5`
- Remove version parameter on assets URLs

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- Fix multiple languages links for index pages
- Add ``hreflang`` links for SEO
- Add locale data of theme templates