Responsive Login Page Codepen

CSS Programming

Have you ever visited a website on your mobile device and realized that the login page was impossible to use? Buttons were too small, text fields were difficult to type in, and the overall experience was frustrating. That’s where responsive design comes in. In this article, I want to show you how you can create a responsive login page using CodePen.

What is CodePen?

Before we dive into the code, let me explain what CodePen is. CodePen is an online code editor and community for front-end developers. It allows you to write HTML, CSS, and JavaScript code directly in your browser and see the results in real-time. It’s a great tool for experimenting, prototyping, and sharing your code with others.

Getting Started

To get started, you’ll need a CodePen account. If you don’t already have one, you can sign up for free at Once you’re signed in, you can create a new “Pen” by clicking on the “New Pen” button in the top menu.

Now that we have our CodePen set up, let’s start building our responsive login page.

HTML Structure

First, let’s start with the HTML structure of our login page. We’ll create a simple form with two input fields for the username and password, and a submit button.

<input type="text" placeholder="Username">
<input type="password" placeholder="Password">
<button type="submit">Log In</button>

With this basic HTML structure in place, let’s move on to the CSS.

CSS Styling

To make our login page responsive, we’ll use CSS media queries. Media queries allow us to apply different styles based on the device’s screen size. Here’s an example of how we can style our login form for mobile devices:

@media (max-width: 600px) {
form {
width: 90%;
margin: 0 auto;

input {
width: 100%;
margin-bottom: 10px;

button {
width: 100%;

In this example, we’re targeting devices with a maximum width of 600 pixels. Inside the media query, we’re setting the form width to 90% and centering it horizontally using margin: 0 auto. We’re also making the input fields and submit button take up the full width of their container.

Of course, you can customize the styling to fit your own design preferences. Feel free to experiment and play around with different styles and media query breakpoints.


Building a responsive login page doesn’t have to be difficult. With CodePen, you can easily create and test your code in real-time. By using CSS media queries, you can ensure that your login page looks great on any screen size, providing a seamless user experience. So, why not give it a try and see the difference it can make for your website?