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Jul 16, 2026

🧪 Preview channel for Citizen 4 Wikis can now opt in to try the upcoming Citizen 4 ahead of its release through the new preview channel, which replaces the old experimental features switch.
🎨 An overhauled theme system (preview) Citizen 4's preview brings a reworked theme system, with first-class support for custom themes, a redesigned theme picker, and a new pure-black theme.
📱 Site header at the top on mobile A new setting lets wikis position the site header at the top of the screen on mobile, instead of pinned to the bottom.
🌗 Any theme can be the default Wikis can now set any theme value as the site-wide default appearance, including wiki-defined custom themes, not just light or dark.

config: ✨ ⚙️ accept any theme as the default theme (by @alistair3149) 4b597b2
header: ✨ allow positioning the site header at the top on mobile (by @alistair3149) ebfd544
preferences: ✨ offer Black as a theme in the preferences panel (preview) (by @alistair3149) 391988e
preferences: ✨ redesign the theme picker (preview) (by @alistair3149) (#1654) d3295af
preview: ✨ replace the experimental token switch with a version-scoped preview channel (by @alistair3149) (#1617) a80d552
tokens: ✨ add the Black theme (preview) (by @alistair3149) 4ca7c18

Cite: 🐛 correct code element font styles in cite (by @alistair3149) 03e1340
CookieWarning: 🐛 keep the banner clear of the site header on mobile (by @alistair3149) 281b78d
header: 🐛 match the mobile header glass to the header surface color (by @alistair3149) 5cb1e42
notifications: 🐛 show notifications when the interface language is invalid (by @alistair3149) c7acba9, closes #1638
scripts: 🐛 keep the skin working when the interface language is invalid (by @alistair3149) 124e1a8, closes #1638
tokens: 🐛 add light mode icon background colors to the new tokens (preview) (by @alistair3149) 859001f

alistair3149 and mayuxi