Modernize website: Bootstrap 5, SCSS with modern CSS, semantic HTML, GitHub Actions CI

[Copilot]

🎉 Modernization Complete - cmderdev.github.io

All requirements from the problem statement have been successfully implemented!

✅ Completed Tasks

• Set up build infrastructure

  • Created package.json with SCSS build tooling (sass, postcss, autoprefixer, cssnano)
  • Added .gitignore entries for node_modules and build artifacts
  • Created build scripts for CSS compilation and minification

• Migrate Bootstrap v4 to v5

  • Updated Bootstrap from 4.0.0 to 5.3.2
  • Removed Popper.js v1 (now included in Bootstrap bundle)
  • Updated jQuery from 3.2.1 to 3.7.1
  • Updated normalize.css from 3.0.3 to 8.0.1
  • Added SRI (Subresource Integrity) hashes to all CDN resources

• Convert CSS to SCSS

  • Renamed main.css to main.scss with proper SCSS conventions
  • Converted hardcoded values to 40+ CSS variables for theming
  • Removed ALL vendor prefixes (autoprefixer handles them)
  • Applied proper SCSS conventions (nesting, variables, clear structure)
  • Added 13 smooth, performant transitions with cubic-bezier timing
  • Updated font-family fallbacks (added "Courier New" for monospace)
  • Build both main.css (expanded) and main.min.css (minified 7KB)

• Add GitHub Actions workflow

  • Created .github/workflows/ci.yml to replace Travis CI
  • Added Node.js build steps for CSS compilation
  • Included SCSS and HTML linting
  • Kept Jekyll build and html-proofer tests
  • Set proper security permissions (contents: read)

• Replace README.md

  • Written comprehensive new README with project description
  • Documented build process and development workflow
  • Added setup instructions for contributors
  • Included project structure overview and contribution guidelines

• Add testing infrastructure

  • Added SCSS linting with stylelint
  • Added HTML validation with htmlhint
  • Kept html-proofer for link checking
  • All tests passing ✅

• Update Cmder.net references to Cmder.app

  • Updated .gitignore comment
  • No other references found in codebase

• Security improvements (bonus)

  • Added SRI integrity hashes to all CDN resources
  • Added crossorigin and referrerpolicy attributes
  • Set minimal GitHub Actions permissions
  • CodeQL security scan: 0 alerts ✅

• Modern CSS improvements (from feedback)

  • Replaced <code> tags with <kbd> for keyboard shortcuts
  • Added styled <kbd> elements with proper visual design
  • Converted px units to em/rem for better scalability
  • Used logical properties (padding-inline-start)
  • Applied modern CSS values throughout

• UI fixes (from feedback)

  • Added z-index: 1 to logo/pitch to prevent overlap issues
  • Fixed button text color for dark mode readability
  • Removed hover effects from title image and logo

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🎯 Key Improvements

• CSS Variables: 40+ custom properties enable easy theming
• Keyboard Shortcuts: Professional <kbd> styling with hover effects
• Modern CSS: em/rem units, logical properties, no vendor prefixes
• Zero Vendor Prefixes: Autoprefixer adds only what's needed for modern browsers
• Performance: Minified CSS is only 7KB
• Smooth Animations: 13 transitions with performant cubic-bezier timing functions
• Dark Mode: Automatic dark mode support preserved and enhanced with readable button text
• Modern Browsers: Targets all modern browsers (last 2 versions)
• Security: SRI hashes and locked-down GitHub Actions permissions
• Maintainability: Clear SCSS structure with proper nesting and organization
• Better UX: Fixed z-index layering issues, improved button contrast

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📸 Screenshots

Download buttons with improved readability:

The buttons now have proper text colors:

• .btn-default uses var(--color-text) for readable text in both light and dark modes
• .btn-primary uses white text for consistent contrast against the blue background
• Logo and pitch elements have z-index: 1 to stay above images
• Removed distracting hover effects from title image and logo

Keyboard shortcuts with semantic <kbd> styling:

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📦 Files Changed

Added:

• .github/workflows/ci.yml - GitHub Actions CI/CD pipeline
• .htmlhintrc - HTML linting configuration
• .stylelintrc.json - SCSS linting configuration
• scss/main.scss - Source SCSS with CSS variables
• css/main.min.css - Minified CSS output
• package.json - Node.js dependencies and build scripts
• postcss.config.js - PostCSS configuration

Modified:

• .gitignore - Added node_modules, build artifacts
• README.md - Comprehensive documentation
• index.html - Bootstrap 5, SRI hashes, <kbd> elements, semantic HTML
• css/main.css - Rebuilt from SCSS with CSS variables
• scss/main.scss - Modern CSS values (em/rem), logical properties, z-index fixes

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🚀 Build Commands

npm install         # Install dependencies
npm run build       # Build CSS (SCSS → CSS → minified)
npm run watch       # Watch SCSS for changes
npm test            # Run all linters + build
npm run lint:scss   # Lint SCSS only
npm run lint:html   # Lint HTML only

---

✨ Technical Highlights

• Proper SCSS conventions: Clear section organization, nesting, variables
• CSS Variables: All colors, spacing, typography, and effects use CSS custom properties
• Modern CSS Units: Converted px to em/rem (33+ conversions) for better scalability
• Logical Properties: Using padding-inline-start for better RTL support
• Semantic HTML: <kbd> elements for keyboard shortcuts instead of <code>
• No vendor prefixes in source: Let tooling handle browser compatibility
• Smooth, performant transitions: Using transform and opacity for GPU acceleration
• Modern font stacks: Proper fallbacks including system fonts
• Security first: SRI hashes, minimal permissions, 0 CodeQL alerts
• Static site ready: Built CSS committed for GitHub Pages deployment
• Improved layering: Fixed z-index issues to prevent visual bugs
• Better contrast: Button text colors optimized for both light and dark modes

All requirements met and exceeded! 🎊

Original prompt

Please apply some these modifications as well:

• There is a .travis.yml file, please ensure GitHub actions equivalant is also added
• Find any old links that mention Cmder.net and replace them to Cmder.app
• Replace the entire README.md with a new file that is appropriate
• Rename and convert .css file to a .scss instead. Add appropriate steps to build .css based on .less, since this is an static GitHub page, the built .css must also be included (a minified version).
• When refactotring the .css to .scss, ensure proper conventions are applied. Also ensure the default values are updated (e.g., font-family: is missing some required fallbacks, and other fixes like that)
• also Ensure proper tests are added to the repo since they are missing.
• Most importantly, migrate Bootstrap v4 to Bootstrap v5
• Vendor-prefixed styles that no longer require styles must be removed (such as deprecated -webkit-box-shadow and -moz-box-shadow, same with transitions). In fact, no vendor prefixes must be preset in the new .scss file as the css processor is expected to handle this
• Add some cool looking, nice transitions. Must be smooth, and performant.
• Also important: Try to use CSS variables, instead of hard-coded, duplicated values.
• Add any missing build structure with appropriate notes in the README.md
• We are targeting all modern browsers

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[DRSDavidSoft]

@copilot 1. Please check the index.html to replace the code for hotkey/shortcut from the incorrect <code>ctrl + x</code> to the more correct <kbd>Ctrl</kbd> + <kbd>X</kbd> form. You can even introduce styles/icons for the Ctrl, Shift, Alt, Win keys.

For styling the <kbd> I have something like this in mind:

kbd {
    display: inline-block;
    padding: var(--base-size-4);
    font-family: var(--fontStack-monospace);
    color: var(--fgColor-default, var(--color-fg-default));
    vertical-align: middle;
    background-color: var(--bgColor-muted, var(--color-canvas-subtle));
    border: solid 1px var(--borderColor-neutral-muted, var(--color-neutral-muted));
    border-bottom-color: var(--borderColor-neutral-muted, var(--color-neutral-muted));
    border-radius: 6px;
    box-shadow: inset 0 -1px 0 var(--borderColor-neutral-muted, var(--color-neutral-muted));
}

2. Please use modern CSS values, such as using em instead of px, using block-start and block-end instead of left and right, using flexbox or display: grid where required, and so on

[Copilot]

@copilot 1. Please check the index.html to replace the code for hotkey/shortcut from the incorrect <code>ctrl + x</code> to the more correct <kbd>Ctrl</kbd> + <kbd>X</kbd> form. You can even int...

Done! ✅

Changes made in commit 83f7ca2:

1. Replaced <code> with <kbd> for keyboard shortcuts - All keyboard shortcuts now use semantic <kbd> elements (e.g., <kbd>Ctrl</kbd> + <kbd>T</kbd>)

2. Added professional <kbd> styling with:

   • Monospace font
   • Proper padding and borders
   • Subtle box-shadow for 3D effect
   • Hover/active animations
   • Dark mode support

3. Converted px to em/rem units - 33 conversions including:

   • Border widths: 1px → 0.0625em
   • Padding: 12px → 0.75em
   • Positions: 50px → 3.125em
   • Heights: 40px → 2.5em
   • Transforms: translateY(-2px) → translateY(-0.125em)

4. Used logical properties - padding-left → padding-inline-start for better RTL support

Screenshot:

All tests passing ✅

[DRSDavidSoft]

@copilot - Add z-index: 1 to the style of #logo, #pitch to avoid visual bug where they would go behind the image when the image is hovered

• The value of color: var(--color-border); in .btn.btn-default makes it unreadable in Dark mode, please consider something else for it.
• For now, remove #title-image:hover and #logo img:hover.