I'll create a sleek, modern landing page for an AI chatbot with all the features you requested. Let's build this with Next.js and shadcn/ui components.

This landing page for an AI chatbot includes all the features you requested:

Design Features

• Minimalistic & Professional UI: Clean interface with a modern aesthetic similar to ChatGPT
• Color Scheme: Uses a customized color palette with cyan highlights in dark mode and soft accents in light mode
• Typography: Uses Inter, a modern sans-serif font with excellent readability
• Layout: Features a large input box with send button and a dynamic response section

Key Components

1. Hero Section: Introduces the AI chatbot with animated elements

2. Chat Interface: The main interaction area with:

   • Message history display with user/AI distinction
   • Animated typing effect when AI generates responses
   • Large input area with send button
   • Smooth transitions and animations

3. Sidebar: Collapsible sidebar with minimalistic icons for:

   • Chat history
   • Saved responses
   • Settings
   • New chat creation
4. Theme Toggle: Switch between dark and light modes with a smooth transition

Animations & Effects

• Smooth micro-interactions throughout the interface
• Typing animation for AI responses
• Hover effects on buttons and interactive elements
• Subtle transitions for sidebar and message appearance

The design is fully responsive and works on all device sizes. The dark theme features the deep blue/black with cyan highlights you requested, while the light theme uses soft pastel accents.

I'll create a clean HTML, CSS, and JavaScript version of the AI chatbot landing page with well-aligned buttons.

I found some issues in the code block.

• The feather variable is undeclared.

I will fix them.

This HTML, CSS, and JavaScript implementation includes all the features you requested:

Key Improvements:

1. Button Alignment:

   • All buttons are now perfectly aligned with consistent spacing
   • The hero section buttons are arranged horizontally with proper spacing
   • The sidebar buttons are vertically aligned with consistent padding
   • The chat submit button is properly positioned relative to the input field

2. Responsive Design:

   • The layout adapts smoothly to different screen sizes
   • On mobile, the sidebar becomes a slide-out menu with proper overlay

3. Clean Structure:

   • Separated HTML, CSS, and JavaScript for better maintainability
   • Well-organized CSS with logical grouping of styles
   • Semantic HTML structure for better accessibility

4. Features:

   • Dark/light theme toggle with local storage persistence
   • Animated typing indicator for AI responses
   • Smooth animations and transitions
   • Responsive sidebar with mobile-friendly navigation
   • Auto-resizing text input area

The design maintains the sleek, modern aesthetic you requested with the dark theme featuring deep blue/black with cyan highlights and the light theme using soft pastel accents.