Learn CSS Variables by Building a City Skyline - Step 10

Tell us what’s happening:
Describe your issue in detail here.
Am not getting this particular one. please can someone help me?
Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">    
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />


<!-- User Editable Region -->

    <div class="background-buildings">
      <div class="bb1"></div>
    .bb1 {
      width: 10%;
      height: 70%;

<!-- User Editable Region -->

/* file: styles.css */
* {
  border: 1px solid black;
  box-sizing: border-box;

body {
  height: 100vh;
  margin: 0;
  overflow: hidden;

.background-buildings {
  width: 100%;
  height: 100%;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36 Edg/109.0.1518.70

Challenge: Learn CSS Variables by Building a City Skyline - Step 10

Link to the challenge:

The instruction: " Open your styles.css file…"
Your css code goes into styles.css file:

You have added it to HTML code.

1 Like

Thank you boss. Please it has worked .
Thanks a lot

1 Like

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