Add Animal Island theme

_posts/theme/2026-05-24-animal-island.md

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+---
+layout: theme
+title: Animal Island
+category: theme
+homepage: https://github.com/YanyingWei1997/typora-theme-animal-island
+download: https://github.com/YanyingWei1997/typora-theme-animal-island/archive/main.zip
+built-in: false
+author: YanyingWei1997
+thumbnail: animal-island-thumbnail.png
+typora-root-url: ../../
+---
+A cozy Animal Crossing–inspired theme with warm parchment surfaces, mint accents, and soft 3D pillow shadows. Includes a **Light** version and a **Dark** (forest night) variant.
+
+Highlights:
+
+- Six distinct heading styles — gradient cards, color bars, capsule stickers — every level recognisable at a glance.
+- Paw-print horizontal rules and custom 3D checkboxes.
+- High-contrast Source Mode: Markdown markers tinted mint, titles in cream — no more illegible default blue on dark backgrounds.
+
+![Preview of Animal Island theme — Light](/media/theme/animal-island/preview.png)
+
+![Preview of Animal Island theme — Dark](/media/theme/animal-island/preview-dark.png)
+
+Tested on macOS. Inspired by [animal-island-ui](https://github.com/guokaigdg/animal-island-ui).