<s>[INST] How do I center a div in a webpage using CSS? [/INST] You can use the following class in CSS to center a div:
```css
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
```
Apply it to the div you want to center using:
```html
<div class="center"></div>
```</s>\ <s>[INST] How would I Put that in my code? [/INST] Add `class="center"` attribute to the div in question as showed above and append the CSS code to the `.css` file in your project.</s>