This repository is a community theme for Obsidian, the local-first Markdown note-taking application. It is not a data pipeline or application codebase; it is a CSS distribution artifact: a single theme.css (~28,000 tokens) plus a legacy obsidian.css copy, shipped with an Obsidian manifest.json for the community marketplace. When installed, the theme reskins the entire Obsidian UI — editor, live preview, reading view, sidebar, modal dialogs, mobile interface — to mirror the design language of the Things 3 task manager. The code operates entirely through Obsidian's CSS variable contract (--color-base-*, --text-*, --interactive-*) and its DOM class structure, with no JavaScript, build tooling, or test suite. The maintained theme.css is well-engineered for its medium: a centralized design-token system with light/dark schemes, responsive mobile/tablet breakpoints, print handling, and a declarative @settings YAML block that renders as a user-facing configuration panel via the Style Settings community plugin. Its standout feature is an alternate checkbox system encoding 20+ semantic task states (important, star, question, bookmark, fire, idea, savings, up/down, PR states, etc.) as SVG data-URI masks applied via -webkit-mask-image — a self-contained, genuinely portable CSS pattern. A large icon-replacement block (heavily derived from @kepano's Minimal theme, as credited in the README) swaps Obsidian's default Lucide icons for a custom line-icon set without external network requests. Plugin-specific overrides provide polish for Kanban, Todoist, Checklist, Calendar, and Dataview. Caveats: the repo carries two divergent theme files — obsidian.css is V1 (version 1.8.2, kept for older Obsidian releases) while theme.css is the current V2 — and selectors for both the legacy CodeMirror 5 editor (.cm-s-obsidian, .CodeMirror) and the modern CodeMirror 6 editor (mod-cm6) are maintained side by side. The icon-replacement block is largely inherited rather than original, and the code uses many !important overrides and some commented-out experiments, which is normal for this genre. Within the Obsidian theme ecosystem this is a high-craft, actively maintained project: 1026 stars, 54 open issues, recent commits, and a clean MIT license.