Learn CSS Variables by Building a City Skyline - Step 25

HTML-CSS
1

Tell us what’s happening:
I’m really confused on what to do with the :root thing

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 */

/* User Editable Region */

:root {
  
}

* {
  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;
}

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


/* User Editable Region */

.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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

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

Link to the challenge:

2

You added the :root selector correctly but you didn’t do this:

“move all your variable declarations there.”

3 
:root {
  background-color: var(--building-color3, pink);
  --building-color1: #aa80ff;
  --building-color2: #66cc99;
  --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;
}

.bb3 {
  width: 10%;
  height: 55%;
}

Would it be like this?

4

Don’t ask me. Ask the tests :slightly_smiling_face:

Remember, the only thing you want to do is move the custom variable definitions in .bb1 to :root. Don’t make any other changes than this. And while the background-color property uses a custom variable but it is not a custom variable definition.

If you have made too many other unexpected changes then you might want to restart the step to get the original CSS back and then be careful to only do what the instructions ask and no more.