Learn CSS Variables by Building a City Skyline - Step 25

  • Step 25

That one used the fallback value as well? I see the problem now! The variables you declared in .bb1 do not cascade to the .bb2 and .bb3 sibling elements. That’s just how CSS works. Because of this, variables are often declared in the :root selector. This is the highest level selector in CSS; putting your variables there will make them usable everywhere. Add the :root selector to the top of your stylesheet, and move all your variable declarations there.

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

<body>
  <div class="background-buildings">
    <div></div>
    <div></div>
    <div class="bb1">
      <div class="bb1a"></div>
      <div class="bb1b"></div>
      <div class="bb1c"></div>
      <div class="bb1d"></div>
    </div>
    <div class="bb2"></div>
    <div class="bb3"></div>
    <div></div>
    <div class="bb4"></div>
    <div></div>
    <div></div>
  </div>
</body>
</html>
/* file: styles.css */
:root {--building-color1: #aa80ff;}
:root {--building-color2: #66cc99;}
:root {--building-color3: #cc6699;}
* {
border: 1px solid black;
box-sizing: border-box;
}

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

.background-buildings {
width: 100%;
height: 100%;
display: flex;
align-items: flex-end;
justify-content: space-evenly;
}

.bb1 {
width: 10%;
height: 70%;
display: flex;
flex-direction: column;
align-items: center;
--building-color1: #aa80ff;
--building-color2: #66cc99;
--building-color3: #cc6699;
}
.bb1a {
width: 70%;
height: 10%;
background-color: var(--building-color1);
}

.bb1b {
width: 80%;
height: 10%;
background-color: var(--building-color1);
}

.bb1c {
width: 90%;
height: 10%;
background-color: var(--building-color1);
}

.bb1d {
width: 100%;
height: 70%;
background-color: var(--building-color1);
}

.bb2 {
width: 10%;
height: 50%;
background-color: var(--building-color2, green);
}

.bb3 {
width: 10%;
height: 55%;
background-color: var(--building-color3, pink);
}

.bb4 {
width: 11%;
height: 58%;
}
  
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Challenge: Learn CSS Variables by Building a City Skyline - Step 25

Link to the challenge:

Hello.
From your post, I wasn’t able to understand: do you have any questions/issues related to this step or not?