Learn CSS variables by Building a city skyline

:root {
–building-color1: #aa80ff;
–building-color2: #66cc99;
–building-color3: #cc6699;
–building-color4: #538cc6;
–window-color1: black;
}

  • {
    border: 1px solid black;
    box-sizing: border-box;
    }

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

.background-buildings, .foreground-buildings {
width: 100%;
height: 100%;
display: flex;
align-items: flex-end;
justify-content: space-evenly;
position: absolute;
top: 0;
}

/* BACKGROUND BUILDINGS - “bb” stands for “background building” */
.bb1 {
width: 10%;
height: 70%;
display: flex;
flex-direction: column;
align-items: center;
}

.bb1a.bb1-window { }
.bb1b.bb1-window { }
.bbic.bb1-window { }

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

.bb1-window {
height: 10%;
background: linear-gradient(
var(–building-color1),
var(–window-color1)
);
}

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

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

.bb4 {
width: 11%;
height: 58%;
background-color: var(–building-color4);
}

/* FOREGROUND BUILDINGS - “fb” stands for “foreground building” */
.fb1 {
width: 10%;
height: 60%;
background-color: var(–building-color4);
}

.fb2 {
width: 10%;
height: 40%;
background-color: var(–building-color3);
}

.fb3 {
width: 10%;
height: 35%;
background-color: var(–building-color1);
}

.fb4 {
width: 8%;
height: 45%;
background-color: var(–building-color1);
position: relative;
left: 10%;
}

.fb5 {
width: 10%;
height: 33%;
background-color: var(–building-color2);
position: relative;
right: 10%;
}

.fb6 {
width: 9%;
height: 38%;
background-color: var(–building-color3);
}

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Post the entire html and css code properly formatted.
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City Skyline
<div class="foreground-buildings">
  <div></div>
  <div></div>
  <div class="fb1"></div>
  <div class="fb2"></div>
  <div></div>
  <div class="fb3"></div>
  <div class="fb4"></div>
  <div class="fb5"></div>
  <div class="fb6"></div>
  <div></div>
  <div></div>
</div>

the CSS CODE UPTO STEP 42:

:root {
–building-color1: #aa80ff;
–building-color2: #66cc99;
–building-color3: #cc6699;
–building-color4: #538cc6;
–window-color1: black;
}

  • {
    border: 1px solid black;
    box-sizing: border-box;
    }

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

.background-buildings, .foreground-buildings {
width: 100%;
height: 100%;
display: flex;
align-items: flex-end;
justify-content: space-evenly;
position: absolute;
top: 0;
}

/* BACKGROUND BUILDINGS - “bb” stands for “background building” */
.bb1 {
width: 10%;
height: 70%;
display: flex;
flex-direction: column;
align-items: center;
}

.bb1a.bb1-window {
width: 70%;
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);
}

.bb1-window {
height: 10%;
background: linear-gradient(
var(–building-color1),
var(–window-color1)
);
}

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

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

.bb4 {
width: 11%;
height: 58%;
background-color: var(–building-color4);
}

/* FOREGROUND BUILDINGS - “fb” stands for “foreground building” */
.fb1 {
width: 10%;
height: 60%;
background-color: var(–building-color4);
}

.fb2 {
width: 10%;
height: 40%;
background-color: var(–building-color3);
}

.fb3 {
width: 10%;
height: 35%;
background-color: var(–building-color1);
}

.fb4 {
width: 8%;
height: 45%;
background-color: var(–building-color1);
position: relative;
left: 10%;
}

.fb5 {
width: 10%;
height: 33%;
background-color: var(–building-color2);
position: relative;
right: 10%;
}

.fb6 {
width: 9%;
height: 38%;
background-color: var(–building-color3);
}

Step 42
Add the new bb1-window class to the .bb1a, .bb1b, and .bb1c elements. This will apply the gradient to them.

Result:
Test
Sorry, your code does not pass. Keep trying.

Hint
You should add the bb1-window class to the .bb1a element.

Restart step.

Your task is to add the class named bb1-window to the first three div elements within the div element with a class set to “bb1”. If you have to add two or more classes to an html element follow the rule:

<element class="value1 value2 value3"></element>

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