feat(requirements): add tagline with blinking cursor

- Add "i'm lovin' IT" tagline below McDonald's ASCII logo
- Implement blinking cursor animation after tagline
- Update layout structure in CLAUDE.md
- Add detailed tagline requirements in project-spec.md
- Specify CSS animation for cursor blink (1s interval)
- Update Step 2.1 to include tagline implementation

New visual element: centered tagline with terminal-style cursor.

CLAUDE.md

@@ -84,8 +84,9 @@ Do NOT delegate routine tasks to specialists. Only invoke specialist agents when
 
 ### Layout Structure
 1. **Center**: ASCII art of "McDonald's" logo as main visual element
-2. **Below**: Halloween event information and activity details
-3. **Overall**: Terminal/command-line interface aesthetic
+2. **Tagline**: Below logo, empty line, then centered "i'm lovin' IT" with blinking cursor
+3. **Below**: Halloween event information and activity details
+4. **Overall**: Terminal/command-line interface aesthetic
 
 ### Technical Requirements
 - **Responsive**: Must work seamlessly on both web (desktop) and mobile devices
@@ -245,6 +246,8 @@ See `.claude/time-recording-policy.md` for complete guidelines.
 **Step 2.1: Design ASCII Art Logo**
 - ⏳ Create McDonald's ASCII art (desktop version)
 - ⏳ Create McDonald's ASCII art (mobile version)
+- ⏳ Add "i'm lovin' IT" tagline below logo (centered)
+- ⏳ Implement blinking cursor after tagline (CSS animation)
 - ⏳ Test legibility on different screen sizes
 - **Owner**: Primary Agent
 - **Consultant**: minimalist-geek-webpage-builder (if needed)