body,button,h1,input{margin:0;padding:0;font-family:Inter,sans-serif;box-sizing:border-box}body{background-color:#f9f9f9;display:flex;justify-content:center;align-items:center;height:100vh;margin:0}.chat-container{display:flex;flex-direction:column;justify-content:space-between;padding:20px;width:100%;max-width:800px;height:90vh;background-color:#fff;border-radius:10px;box-shadow:0 4px 12px rgba(0,0,0,.1)}.chat-header{margin-bottom:20px;font-size:24px;font-weight:700;color:#333;text-align:center}.chat-messages{flex-grow:1;border:1px solid #ddd;padding:15px;border-radius:10px;overflow-y:auto;background-color:#f9f9f9;margin-bottom:20px}.chat-message{margin-bottom:15px;display:flex;flex-direction:column}.chat-message.user{align-items:flex-end}.chat-message.assistant{align-items:flex-start}.chat-message-content{padding:10px;border-radius:8px;max-width:75%;font-size:16px;line-height:1.5}.chat-message-content.user{background-color:#007bff;color:#fff}.chat-message-content.assistant{background-color:#f1f1f1;color:#333}.chat-input-container{display:flex;align-items:center;padding-top:10px;border-top:1px solid #ddd}.chat-input{flex:1;padding:12px;border-radius:20px;border:1px solid #ccc;margin-right:10px;font-size:16px}.chat-button{padding:10px 20px;border-radius:20px;background-color:#007bff;color:#fff;border:none;cursor:pointer;font-size:16px}.chat-button:disabled{background-color:#ccc;cursor:not-allowed}