Welcome back! In the previous lesson, you enhanced your chatbot application by adding message suggestions, making it more user-friendly and efficient. Today, we will focus on enhancing the interface to make it more interactive and professional. Enhancing logic is crucial in web applications as it improves user experience by providing a clean and intuitive interface.

To begin styling our chatbot interface, we need to create a CSS file. This file will contain all the styles that define the appearance of our application. Let's create a file named style.css in the public/stylesheets/ directory. This directory is where we store static files like CSS, JavaScript, and images.

Here is the project structure showing the location of the style.css file:

Once the CSS file is created, we need to link it to our HTML template. Open your chat.erb file and structure it as follows:

Now that we have our CSS file linked, let's start by styling the basic structure of our HTML elements. We'll focus on the html, body, and main container elements to set the foundation for our design.

In your style.css file, add the following styles:

These styles ensure that the html and body elements take up the full height of the viewport, with no margin or padding. The body is set to a flex container, allowing us to easily arrange its child elements in a column. The font-family property sets a clean and modern font for the entire application.

Let's style the chat container and messages to ensure they are responsive and user-friendly. Add the following styles to your style.css file:

The #chat-container is styled as a flex container with a maximum width, ensuring it is centered and responsive. The #messages element is styled to allow scrolling when messages overflow, with a border and padding for a neat appearance. The .message class adds spacing and padding to individual messages, while the .user and .assistant classes align messages to the right and left, respectively, for clear differentiation.

Finally, let's style the input section to ensure it is functional and visually consistent with the rest of the interface. Add the following styles to your style.css file:

The .input-container class uses flexbox to arrange input elements with a gap for spacing. The .input-wrapper class allows the input field to expand and fill available space. The #message-input ID styles the input field with full width, padding, and a border. The button selector styles all buttons with padding, text color, background color, and cursor properties. The #new-chat-btn ID provides a specific background color for a new chat button.

In this lesson, you learned how to enhance your chatbot interface. We covered structuring the chatbot logic, implementing basic chat functionality, and integrating it with the application. These enhancements ensure that your chatbot is not only functional but also provides a seamless user experience.

As you move on to the practice exercises, focus on experimenting with different logic to achieve the desired behavior. This hands-on practice will deepen your understanding and allow you to create a professional-looking interface. Keep up the great work, and let's continue building this exciting application together!