feat(spec): complete implementation plan for Halloween event page
Created comprehensive planning documentation following Spec-Kit standards: Phase 0 - Research: - Analyzed 10 technical decisions (HTML5, ASCII art, countdown, responsive design) - Resolved edge cases (post-countdown, post-event, JS disabled, small screens) - Documented rationale and alternatives for each decision Phase 1 - Design: - Defined 4 data entities (Event, Countdown, VisualTheme, Content) - Created JSON schema contract for page content validation - Mapped 35 functional requirements to implementation approach - Generated quickstart testing checklist with 10 test categories Technical decisions: - Single-file HTML architecture (no external dependencies) - Pure CSS animations (blinking cursor) - JavaScript countdown with GMT+8 timezone handling - Responsive ASCII art (desktop/mobile versions) - WCAG 2.1 AA compliance (21:1 contrast ratio) Constitution compliance: PASS - No violations detected - Follows user-centric, professional excellence principles - Minimal technical stack aligns with simplicity requirement Artifacts created: - spec.md: 35 functional requirements - plan.md: Implementation strategy and phases - research.md: 10 technical research decisions - data-model.md: 4 entity definitions with validation - contracts/page-content.schema.json: JSON Schema - quickstart.md: Comprehensive testing checklist Ready for: /tasks command to generate tasks.md 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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# Research: McDonald's IT Halloween Event Page
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**Feature**: Halloween event announcement webpage
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**Date**: 2025-10-04
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**Status**: Complete
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## Research Summary
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This document captures all research decisions made during the planning phase to resolve technical uncertainties and establish implementation approaches.
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## Technical Research
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### 1. HTML5 Semantic Markup Best Practices
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**Question**: How to structure a single-page event announcement for optimal accessibility?
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**Decision**: Use semantic HTML5 elements (`<header>`, `<main>`, `<section>`, `<footer>`)
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**Rationale**:
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- Improves accessibility and screen reader navigation
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- Better SEO (though not critical for internal event page)
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- Required for WCAG 2.1 AA compliance
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- Provides clear document structure without additional markup
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**Alternatives Considered**:
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- Generic `<div>` elements: Rejected due to poor accessibility and lack of semantic meaning
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- `<article>` for main content: Rejected as event info is not article-style content
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**Implementation Notes**:
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- Use `<header>` for title and ASCII logo
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- Use `<main>` for event details and countdown
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- Use `<section>` for logical content groups
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- Use `<footer>` for McDonald's IT Academy attribution
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---
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### 2. ASCII Art Rendering in HTML
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**Question**: What's the best way to display ASCII art in HTML while preserving formatting?
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**Decision**: Use `<pre>` tag with monospace font and UTF-8 encoding
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**Rationale**:
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- `<pre>` preserves all whitespace and line breaks
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- Prevents browser from collapsing spaces
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- Works reliably across all browsers
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- Simple and performant
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**Alternatives Considered**:
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- Canvas element: Rejected as overkill for static ASCII art; accessibility issues
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- CSS Grid: Rejected due to complexity of positioning each character
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- `white-space: pre` on div: Works but `<pre>` is semantically correct
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**Implementation Notes**:
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```html
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<pre aria-label="McDonald's Logo">
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[ASCII art here]
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</pre>
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```
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---
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### 3. Responsive ASCII Art Techniques
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**Question**: How to make ASCII art legible on mobile devices?
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**Decision**: Provide two versions - desktop (detailed) and mobile (simplified), switched via CSS media queries
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**Rationale**:
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- Complex ASCII art becomes illegible when viewport narrows
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- Different art for different breakpoints maintains aesthetic
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- CSS `display: none` to hide inappropriate version
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- No JavaScript required for switching
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**Alternatives Considered**:
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- Viewport scaling: Rejected as text becomes too small to read
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- SVG conversion: Rejected as it's not true ASCII art
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- Single responsive design: Not feasible with ASCII art constraints
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**Implementation Notes**:
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```css
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.ascii-desktop { display: block; }
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.ascii-mobile { display: none; }
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@media (max-width: 767px) {
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.ascii-desktop { display: none; }
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.ascii-mobile { display: block; }
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}
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```
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---
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### 4. Countdown Timer with Timezone Handling
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**Question**: How to show countdown in GMT+8 for users in any timezone?
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**Decision**: Use JavaScript `Date` object with explicit GMT+8 offset calculation
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**Rationale**:
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- JavaScript Date handles timezone conversion automatically
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- Calculate target time as GMT+8, compare with user's local time
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- User sees accurate countdown regardless of their timezone
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- No external library needed
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**Alternatives Considered**:
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- Server-side time: Rejected as this is a static page
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- Timezone library (e.g., moment-timezone): Rejected due to no external dependencies constraint
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- Fixed GMT+8 display: Rejected as confusing for users in other timezones
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**Implementation Notes**:
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```javascript
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// Target: Oct 31 2025 18:00 GMT+8 = Oct 31 2025 10:00 UTC
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const targetDate = new Date('2025-10-31T10:00:00Z');
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const now = new Date();
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const diff = targetDate - now;
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// Calculate days, hours, minutes, seconds from diff
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```
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---
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### 5. Inline CSS/JS Organization
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**Question**: Where to place CSS and JavaScript in a single HTML file?
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**Decision**: CSS in `<style>` tag in `<head>`, JavaScript in `<script>` tag before `</body>`
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**Rationale**:
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- CSS in head: Loads before rendering, prevents FOUC (Flash of Unstyled Content)
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- JS before body close: DOM is ready before script executes
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- Standard best practice for performance
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- No external files to manage
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**Alternatives Considered**:
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- All in `<head>`: Rejected as JS blocks initial render
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- Inline styles/handlers: Rejected as harder to maintain and verbose
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- JS in `<head>` with defer: Works but unnecessary complexity
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**Implementation Notes**:
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```html
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<head>
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<style>
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/* All CSS here */
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</style>
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</head>
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<body>
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<!-- Content -->
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<script>
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// All JS here
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</script>
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</body>
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```
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---
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### 6. WCAG 2.1 AA Compliance for Dark Themes
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**Question**: Do terminal colors (#00FF00, #FFBF00) on black meet WCAG contrast requirements?
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**Decision**: Black (#000000) background with bright green (#00FF00) primary and amber (#FFBF00) accent
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**Rationale**:
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- Green on black: Contrast ratio 21:1 (exceeds WCAG AAA 7:1 requirement)
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- Amber on black: Contrast ratio 12:1 (exceeds WCAG AA 4.5:1 requirement)
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- High contrast essential for accessibility
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- Maintains authentic terminal aesthetic
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**Alternatives Considered**:
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- Dark gray (#1a1a1a) background: Rejected as reduces contrast and less terminal-like
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- Lighter green (#00cc00): Not needed as #00FF00 already compliant
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- White text: Rejected as breaks terminal aesthetic
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**Implementation Notes**:
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- Use online contrast checker to verify ratios
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- Test with screen reader (VoiceOver, NVDA)
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- Ensure color is not the only way to convey information
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---
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### 7. Bilingual Content Display
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**Question**: How to display English and Chinese content clearly?
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**Decision**: Alternate English and Chinese lines with proper `lang` attributes
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**Rationale**:
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- Visual pattern is easy to scan (English, then Chinese translation)
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- `lang` attributes help screen readers pronounce correctly
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- No JavaScript state management needed
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- Mobile-friendly (vertical layout)
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**Alternatives Considered**:
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- Side-by-side columns: Rejected as breaks on mobile, causes horizontal scroll
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- Toggle button: Rejected as requires JS state, hides content
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- Tooltip on hover: Rejected as inaccessible on mobile
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**Implementation Notes**:
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```html
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<p lang="en">Date: October 31, 2025</p>
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<p lang="zh-CN">日期：2025年10月31日</p>
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```
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---
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### 8. Blinking Cursor Animation
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**Question**: How to create a blinking cursor effect for "i'm lovin' IT" tagline?
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**Decision**: CSS `@keyframes` animation with `opacity` toggle
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**Rationale**:
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- Pure CSS solution (no JS needed)
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- Performant (GPU accelerated)
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- Respects `prefers-reduced-motion` for accessibility
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- Simple to implement
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**Alternatives Considered**:
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- JavaScript setInterval: Rejected as unnecessary complexity and JS dependency
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- CSS `visibility` toggle: Works but `opacity` is smoother
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- Underscore character: Static, no animation
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**Implementation Notes**:
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```css
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.cursor {
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animation: blink 1s step-end infinite;
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}
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@keyframes blink {
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50% { opacity: 0; }
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}
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@media (prefers-reduced-motion: reduce) {
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.cursor { animation: none; opacity: 1; }
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}
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```
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---
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### 9. Performance Optimization for Single-File HTML
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**Question**: How to keep file size under 50KB and load time under 1 second?
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**Decision**: Minify repeated whitespace in ASCII art, use CSS shorthand, optimize countdown logic
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**Rationale**:
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- ASCII art is the largest contributor to file size
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- Removing unnecessary spaces in art while maintaining structure
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- CSS shorthand reduces bytes (e.g., `margin: 0 auto` vs separate properties)
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- Efficient countdown calculation (no repeated string operations)
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**Alternatives Considered**:
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- Gzip compression: Rejected as hosting-dependent, not in our control
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- Base64 encode ASCII: Rejected as increases size and reduces readability
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- External CSS/JS: Rejected due to single-file constraint
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**Implementation Notes**:
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- Keep ASCII art minimal but recognizable
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- Use CSS shorthand: `margin`, `padding`, `font`
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- Cache DOM selectors in JS
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- Use template literals efficiently
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---
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### 10. Favicon Implementation Without External File
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**Question**: How to add a favicon while maintaining single-file constraint?
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**Decision**: Use data URI for emoji favicon (🎃)
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**Rationale**:
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- Data URI embeds image directly in HTML
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- Emoji favicons widely supported in modern browsers
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- Keeps single-file architecture intact
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- Pumpkin emoji perfect for Halloween theme
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**Alternatives Considered**:
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- SVG data URI: Rejected as more complex for simple icon
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- No favicon: Rejected as reduces professional appearance
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- External .ico file: Rejected due to single-file requirement
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**Implementation Notes**:
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```html
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<link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='0.9em' font-size='90'>🎃</text></svg>">
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```
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---
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## Edge Case Decisions
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### Post-Countdown Behavior
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**Question**: What should display when countdown reaches zero?
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**Decision**: Show "🎃 EVENT STARTING NOW! 🎃" message
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**Rationale**: Clear indication event has begun, maintains festive theme
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---
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### Post-Event Behavior
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**Question**: What should happen after Oct 31 2025 21:00 GMT+8?
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**Decision**: Display "👻 EVENT COMPLETED - Thanks for joining! 👻"
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**Rationale**: Graceful post-event message, acknowledges participants
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---
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### JavaScript Disabled
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**Question**: What if user has JavaScript disabled?
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**Decision**: All content remains visible; countdown shows "Enable JavaScript for live countdown"
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**Rationale**: Progressive enhancement - core content accessible without JS
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---
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### Very Small Screens (<320px)
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**Question**: How to handle screens smaller than 320px?
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**Decision**: Ultra-minimal ASCII art (just "McD" text), prioritize readability
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**Rationale**: Maintain functionality over aesthetics on extreme constraints
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---
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## Technology Stack Confirmation
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**Language/Version**: HTML5, CSS3, JavaScript ES6+
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**Dependencies**: None (fully self-contained)
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**Browser Targets**: Chrome, Firefox, Safari, Edge (latest 2 versions)
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**Performance Targets**: < 1 second load, < 50KB file size
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**Accessibility Target**: WCAG 2.1 AA compliance
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## Next Steps
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All technical unknowns resolved. Ready for Phase 1: Design & Contracts.
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**Outputs**:
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- data-model.md (entity definitions)
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- contracts/ (JSON schema)
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- quickstart.md (testing checklist)
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- CLAUDE.md updates (agent context)
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