Improve example CSS files to better demonstrate host style integration

Update `mcp-app.css`, `mcp-app.module.css`, and Svelte/Vue component
styles across all `basic-server-*` examples (and `integration-server`)
to use CSS variables instead of hardcoded values:

- Remove component-local color variables (`--color-primary`, etc.)
- Add derived spacing variables to `global.css` based on `--spacing-unit`
- Replace hardcoded spacing with `--spacing-xs/sm/md/lg` variables
- Add app-defined accent color variables (`--color-accent`,
  `--color-text-on-accent`) to `global.css` for brand customization
- Use app accent colors for button styling
- Update button hover to use `color-mix()` for theme-adaptive lightening
- Change focus-visible to use `--color-ring-primary` outline

This makes the templates more instructive for users and AI coding agents
building new MCP Apps by showing how to consume host-provided variables
semantically, define app-specific accent colors, and create adaptive
styling that integrates with host themes.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Jonathan Hefner 2026-01-29 17:08:27 -06:00
commit c3d91a13ad
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7 changed files with 560 additions and 252 deletions

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