Build a web app for Trippr — an AI-powered travel concierge you message on WhatsApp. The app has two parts: a landing page and an interactive chat demo.

Landing Page

Dark theme (near-black background), green accents (#10B981 or similar). Clean and minimal.

Chat Demo

A full-screen WhatsApp-style chat interface that users reach via "Try the Demo."

When the user sends a message (either by typing or tapping a chip), the bot should respond with realistic, contextual replies. Simulate AI responses — show a typing indicator for 1-2 seconds, then display a response that references the user's points balances and preferences. If someone asks to book a trip, the bot should return a rich itinerary card embedded in the chat with flight details (airline, route, times, points cost with crossed-out cash price), hotel details (name, neighborhood, points cost), and a "Confirm & Book" button. Make the data realistic — real airline codes, real Lisbon neighborhoods, math that makes sense.

The bot should feel smart: it should reference card perks ("your Amex Gold gets 3x on this"), show savings vs. cash, and mention preference learning ("I'll remember that for next time").