docs: fix banner dark-mode contrast

[jdx]

Summary

White banner text was unreadable in dark mode because VitePress inverts `--vp-c-brand-1` per theme:

• Light mode: `#3451b2` (dark indigo) \u2014 white text reads fine
• Dark mode: `#a8b1ff` (light lavender) \u2014 white text is nearly invisible

Hardcode the banner bg to `#3451b2` so it stays dark with white text in both themes.

\U0001F916 Generated with Claude Code

---

Note

Low Risk
Low risk: a single CSS tweak hardcodes the banner background color to avoid theme-variable inversion; no logic or data flow changes.

Overview
For the docs site announcement banner, the background color is now hardcoded to #3451b2 instead of using var(--vp-c-brand-1), keeping white banner text readable in dark mode as well as light mode.

^{Reviewed by Cursor Bugbot for commit 9fa2bc1. Bugbot is set up for automated code reviews on this repo. Configure here.}

[greptile-apps]

Greptile Summary

Fixes banner readability in dark mode by replacing the VitePress theme CSS variable var(--vp-c-brand-1) — which resolves to a light lavender (#a8b1ff) in dark mode — with a hardcoded dark indigo (#3451b2), ensuring white text remains legible in both themes.

Confidence Score: 5/5

This is a safe, minimal CSS-only docs fix with no logic or data concerns.

Single-line change in a docs CSS file that correctly addresses the described dark-mode contrast issue. No P0/P1 findings.

No files require special attention.

Important Files Changed

Filename	Overview
docs/.vitepress/theme/banner.css	Replaces var(--vp-c-brand-1, #3451b2) with hardcoded #3451b2 to keep banner background dark in both light and dark VitePress themes, ensuring white text remains readable.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[VitePress Theme Mode] --> B{Light or Dark?}
    B -->|Light mode| C["--vp-c-brand-1 = #3451b2 (dark indigo)"]
    B -->|Dark mode| D["--vp-c-brand-1 = #a8b1ff (light lavender)"]
    C --> E["Banner bg: #3451b2 ✅ white text readable"]
    D --> F["Banner bg: #a8b1ff ❌ white text invisible (before fix)"]
    D --> G["Banner bg: #3451b2 ✅ white text readable (after fix)"]
    style F fill:#ff9999
    style E fill:#99ff99
    style G fill:#99ff99

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_{Reviews (1): Last reviewed commit: "docs: use solid bg for banner so dark-mo..." | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.03%. Comparing base (73df3ca) to head (9fa2bc1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #601   +/-   ##
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  Coverage   79.03%   79.03%           
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  Files          48       48           
  Lines        7235     7235           
  Branches     7235     7235           
=======================================
  Hits         5718     5718           
  Misses       1140     1140           
  Partials      377      377           

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[gemini-code-assist]

Code Review

This pull request updates the banner's background color in docs/.vitepress/theme/banner.css by replacing a CSS variable with a hardcoded hex value. I have no feedback to provide.