Update UI_UPDATE.MD - mark all 1.1 CSS modularization tasks as completed

UI_UPDATE.MD

@@ -34,22 +34,22 @@ Always come back and update UI_UPDATE.MD once complete with task and task item.
 - [x] Test basic page load and styling after migration
 
 #### 1.1.3: CSS Modularization Setup
-- [ ] Analyze current CSS structure and identify logical groupings
-- [ ] Separate reset/normalize styles into separate file
-- [ ] Group layout-related styles into layout.css
-- [ ] Group component-specific styles into components.css
+- [x] Analyze current CSS structure and identify logical groupings
+- [x] Separate reset/normalize styles into separate file
+- [x] Group layout-related styles into layout.css
+- [x] Group component-specific styles into components.css
 
 #### 1.1.4: Variables.css Creation and Integration
-- [ ] Extract all CSS custom properties (--variable) into variables.css
-- [ ] Expand color palette with Dodgers-themed variables
-- [ ] Create typography scale variables (font sizes, line heights)
-- [ ] Establish breakpoint variables for responsive design
+- [x] Extract all CSS custom properties (--variable) into variables.css
+- [x] Expand color palette with Dodgers-themed variables
+- [x] Create typography scale variables (font sizes, line heights)
+- [x] Establish breakpoint variables for responsive design
 
 #### 1.1.5: CSS Architecture Implementation
-- [ ] Implement BEM naming convention throughout CSS
-- [ ] Establish CSS file import hierarchy
-- [ ] Create utility classes for common patterns
-- [ ] Implement mobile-first responsive foundation
+- [x] Implement BEM naming convention throughout CSS
+- [x] Establish CSS file import hierarchy
+- [x] Create utility classes for common patterns
+- [x] Implement mobile-first responsive foundation
 
 ### Sub-task 1.2: JavaScript Separation and Organization