feat: add light/dark mode to theme gallery#95
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Adds system-preference-aware light and dark mode to the gallery. Defaults to the OS preference (prefers-color-scheme), with a manual "Theme: Dark/Light" toggle button in the header that persists the choice to localStorage. Moves all previously hardcoded colours into CSS custom properties so both themes are fully theme-aware. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replaces hardcoded white rgba dot colours with --dot, --dot-hover, and --dot-active CSS variables that switch to black equivalents in light mode. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The lightbox overlay is always dark, but title/close/nav/counter were using theme vars that go light in light mode, making them invisible. Adds --lb-fg, --lb-fg-muted, --lb-btn-bg, --lb-btn-border vars (defined once in :root, not overridden by light theme) so lightbox elements are always readable against the dark scrim. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
prefers-color-schemesettinglocalStorageWhat changed
All changes are in
tools/generate_site.py(the generator);site/index.htmlis a generated artifact and will be rebuilt by CI.CSS: New
--card-hover-border,--carousel-bg,--carousel-placeholder-bg,--btn-hover-bg,--dl-theme-color,--dl-theme-border, and--swatch-bordervariables added to both the dark:rootblock and a new:root[data-theme="light"]block. A@media (prefers-color-scheme: light)block applies light values automatically when the user has no saved preference.HTML:
<button id="theme-toggle">added to the header, reusing the existing.anim-togglestyle.JS: A small
applyTheme()function setsdata-themeon<html>, updates the button label, and persists tolocalStorage— matching the same pattern used by the animation toggle.Test plan
site/index.htmllocally (runpython3 tools/generate_site.py --themes-dir THEMES --output-dir site)localStorage🤖 Generated with Claude Code