A Box Inside A Box Css

CSS Programming

Have you ever come across a situation where you needed to create a box inside a box using CSS? I recently encountered this challenge while working on a web design project, and I must say, it was quite an interesting task to tackle. In this article, I will share with you my experience and provide a step-by-step guide on how to achieve this effect.

The Challenge: Creating a Box Inside a Box

Before we dive into the details, let me explain what exactly I mean by “a box inside a box.” In CSS, a box is typically represented by the <div> element. The challenge here is to have one <div> element nested inside another, creating a visually appealing and structurally sound design.

Initially, I started by creating two <div> elements and positioning them using CSS properties such as position: relative; and position: absolute;. However, I quickly realized that this approach would not achieve the desired effect. The inner box was not properly contained within the outer box, and it did not align as expected.

Thinking Inside the Box

After some trial and error, I discovered a more effective solution. To create a box inside a box, I utilized CSS flexbox, a powerful layout model that allows for flexible and responsive designs. Here’s how I did it:

  1. First, I set the outer box’s display property to flex using the following CSS code:
  2. .outer-box { display: flex; }

  3. Next, I added the desired styling to the outer box, such as dimensions, background color, and margin, to customize its appearance. For example:
  4. .outer-box {
    width: 300px;
    height: 300px;
    background-color: #e0e0e0;
    margin: 20px;

  5. Now, it’s time to create the inner box. To achieve this, I added another <div> element as a child of the outer box and assigned it a class name, such as inner-box.
  6. With the inner box in place, I styled it according to my preferences. This could include properties such as dimensions, background color, border, and padding:
  7. .inner-box {
    width: 200px;
    height: 200px;
    background-color: #ffffff;
    border: 2px solid #000000;
    padding: 20px;

  8. Finally, I positioned the inner box within the outer box using one of the flexbox alignment properties, such as align-self or justify-self. For example, to center the inner box horizontally and vertically:
  9. .inner-box {
    align-self: center;
    justify-self: center;


Creating a box inside a box using CSS can be a challenging task, but with the right approach, it is definitely achievable. By utilizing CSS flexbox, I was able to create a visually appealing and structurally sound design. Remember to experiment and tweak the styling properties to achieve the desired effect.

So, next time you find yourself needing to create a box inside a box, don’t despair! Follow the steps outlined in this article, and you’ll be well on your way to mastering this CSS technique.