Postmillennium Renaissance (PMR)

Source for postmillenniumrenaissance.com — Jon Lontai's (RedFoxRun) hub of interactive mountain bike engineering and trail-economics tools.

Stack

Static HTML/CSS/JS, no build step, no framework, no package.json. Served by GitHub Pages (see CNAME) at the custom domain. Each tool is a self-contained index.html (styles and script inline or same-folder), following the PMR build standard used across the org: single file, mobile-first CSS, a contiguous data block, and confidence-tiered sourcing for anything factual.

Note: an earlier CLAUDE.md in this repo described a Next.js/Tailwind/TypeScript stack. That doesn't match what's actually here — this is plain static HTML. Treat this README as the current source of truth until that file is updated.

Structure

• index.html — homepage: hero, tool directory, about/advocacy sections.
• One folder per tool/page (atlas/, wheel-lab/, suspension-lab/, roi/, geometry/, tire-sim/, parks-us/, parks-ca/, trail-advocacy-atlas/, trail-partnership-atlas/, viscosity-ledger/, headwaters-ledger/, weagle/, pump-track/, metric-clock/, sports-popularity/, singletrack-density/, mtb-weight-price/, MTB-inflation/, wheel-comparison-widget2/, maintenance/, bmx/, dst/, 1977/, autonomy-paradox/, studies/, stickers/, privacy/), each with its own index.html.
• images/ — shared site assets, including the carpet texture (below).
• textures/ — recolorable background patterns (carpet masks from 1880s design patents) plus a studio page to recolor them and copy the CSS. See textures/README.md. Not linked from the site or the sitemap.
• sitemap.xml / robots.txt — SEO, kept in sync with the tool directory.
• CNAME — GitHub Pages custom domain pin (www.postmillenniumrenaissance.com).

The carpet texture

The page-wide background weave (.page-carpet in index.html, and .carpet-field in the plate-archive section) is drawn from an actual public-domain patent:

• Source: US Design Patent No. 28,278 — Eugene A. Crowe, assignor to the E. S. Higgins Carpet Company. "Design for Carpet." Filed December 27, 1897; granted February 8, 1898.
• Status: design patents of that era ran a 3½/7/14-year term (this one elected the 3½-year term), so protection lapsed by 1901 — public domain for well over a century. The scan is the USPTO/Google Patents reproduction of the drawing, not a rights-managed image.
• Assets: images/pmr-carpet-1898-mask.png (the transparent alpha mask actually used — RGB zeroed, ink opaque/paper transparent — so any element can tint it via mask-image + background-color, which is how it re-tints automatically per theme) and images/pmr-carpet-1898-reference.png (the same crop, kept as a plain near-black reference).
• Full derivation notes (DPI, crop boundaries, thresholding, tiling verification): images/pmr-carpet-1898-SOURCE.md.

Applied at low opacity (5% in current use — see each theme's --carpet-ink token) since the source pattern is dense (~45% ink coverage at native res), drawn to be walked on, not read as a watermark.

Local development

No install step. Open index.html (or any tool's index.html) directly in a browser, or serve the directory with any static file server, e.g.:

python3 -m http.server 8000

Deployment

Push to the deployed branch; GitHub Pages serves the repo root directly using CNAME for the custom domain. No CI build step — what's committed is what ships.

License

Copyright (c) 2026 Post Millennium Renaissance (https://www.postmillenniumrenaissance.com).

The site's own code and original text are released under the PolyForm Noncommercial License 1.0.0: free to use, copy, modify and share for any noncommercial purpose, including personal use, research, education, and use by charities, environmental-protection organizations and government institutions. Commercial use needs a separate license; ask through postmillenniumrenaissance.com. Copies must keep the Required Notice: line in LICENSE. The license text controls over this summary.

Exceptions and limits:

• random/ is covered by the same license and keeps its own copy of LICENSE so the folder is self-contained. It was previously MIT (code) and CC BY 4.0 (docs); copies already obtained under those terms keep them.
• wheel-lab/ builds on Matt Ford's MIT-licensed bike-wheel-calc; see THIRD-PARTY-NOTICES.md. Bundled libraries (React and others) keep their own notices inside the page.
• Images, artwork, stickers and photographs (images/, stickers/, textures/, the hero art and Open Graph images) are not licensed by this file. They are reserved unless a file says otherwise. Textures adapted from expired design patents are public-domain source material.
• Facts, figures and quotations taken from third-party studies and sources remain the property of their authors.
• The tool pages in the site's folders are thin wrappers around separately licensed tool repositories (see each tool's own LICENSE).