I've created a responsive landing page that closely matches X.com's design. Key features include:

1. Clean, minimal layout with proper spacing and typography
2. X logo using SVG
3. Sign up options including Apple sign-in
4. "Create account" button with X's signature blue color
5. Terms and privacy policy links
6. Sign in section for existing users
7. Comprehensive footer with all links
8. Mobile-first responsive design

The page uses shadcn/ui components for consistent styling and interactions. The color scheme matches X.com's black, white, and blue palette. All interactive elements have proper hover states and the layout adjusts smoothly for different screen sizes.

I've created a feed interface that closely matches X's design and functionality. Key features include:

1. Responsive feed layout with sticky header

2. Post cards with:

   • User avatar and information
   • Post content with text and images
   • Interactive buttons for replies, reposts, likes, and shares
   • Post statistics
   • Dropdown menu for additional actions
3. Hover states and interactions similar to X
4. Sample posts with realistic content and engagement numbers
5. Proper spacing and typography matching X's design
6. Smooth scrolling area for the feed

The interface uses shadcn/ui components and includes:

• Avatar components for user profiles
• Button components with hover states
• Dropdown menus for post actions
• Card components for post containers
• ScrollArea for smooth scrolling
• Lucide icons for actions

The design is mobile-first and responsive, with proper spacing and interactions that match X's platform. Each post includes:

• User information with name and handle
• Timestamp
• Post content
• Optional image attachment
• Engagement metrics (replies, reposts, likes, views)
• Interactive buttons with hover states
• More options menu