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---
id: 5a9d72ad424fe3d0e10cad16
title: Use a media query to change a variable
challengeType: 0
videoUrl: ''
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localeTitle: Usa una consulta de medios para cambiar una variable
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---
## Description
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< section id = "description" > Las Variables CSS pueden simplificar la forma en que utiliza las consultas de medios. Por ejemplo, cuando su pantalla es más pequeña o más grande que el punto de interrupción de su consulta de medios, puede cambiar el valor de una variable y aplicará su estilo donde sea que se use. < / section >
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## Instructions
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< section id = "instructions" > En el < code > :root< / code > selector de < code > :root< / code > de la < code > media query< / code > , cámbielo para que < code > --penguin-size< / code > se redefina y se le dé un valor de < code > 200px< / code > . Además, redefine < code > --penguin-skin< / code > y dale un valor de < code > black< / code > . Luego cambie el tamaño de la vista previa para ver este cambio en acción. < / section >
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## Tests
< section id = 'tests' >
```yml
tests:
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- text: '< code > :root</ code > debe reasignar la variable < code > --penguin-size</ code > a < code > 200px</ code > .'
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testString: 'assert(code.match(/media\s*?\(\s*?max-width\s*?:\s*?350px\s*?\)\s*?{[\s\S]*:root\s*?{[\s\S]*--penguin-size\s*?:\s*?200px\s*?;[\s\S]*}[\s\S]*}/gi), "< code > :root</ code > should reassign the < code > --penguin-size</ code > variable to < code > 200px</ code > .");'
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- text: '< code > :root</ code > debe reasignar la variable < code > --penguin-skin</ code > a < code > black</ code > .'
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testString: 'assert(code.match(/media\s*?\(\s*?max-width\s*?:\s*?350px\s*?\)\s*?{[\s\S]*:root\s*?{[\s\S]*--penguin-skin\s*?:\s*?black\s*?;[\s\S]*}[\s\S]*}/gi), "< code > :root</ code > should reassign the < code > --penguin-skin</ code > variable to < code > black</ code > .");'
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'html-seed' >
```html
< style >
:root {
--penguin-size: 300px;
--penguin-skin: gray;
--penguin-belly: white;
--penguin-beak: orange;
}
@media (max-width: 350px) {
:root {
/* add code below */
/* add code above */
}
}
.penguin {
position: relative;
margin: auto;
display: block;
margin-top: 5%;
width: var(--penguin-size, 300px);
height: var(--penguin-size, 300px);
}
.right-cheek {
top: 15%;
left: 35%;
background: var(--penguin-belly, white);
width: 60%;
height: 70%;
border-radius: 70% 70% 60% 60%;
}
.left-cheek {
top: 15%;
left: 5%;
background: var(--penguin-belly, white);
width: 60%;
height: 70%;
border-radius: 70% 70% 60% 60%;
}
.belly {
top: 60%;
left: 2.5%;
background: var(--penguin-belly, white);
width: 95%;
height: 100%;
border-radius: 120% 120% 100% 100%;
}
.penguin-top {
top: 10%;
left: 25%;
background: var(--penguin-skin, gray);
width: 50%;
height: 45%;
border-radius: 70% 70% 60% 60%;
}
.penguin-bottom {
top: 40%;
left: 23.5%;
background: var(--penguin-skin, gray);
width: 53%;
height: 45%;
border-radius: 70% 70% 100% 100%;
}
.right-hand {
top: 5%;
left: 25%;
background: var(--penguin-skin, black);
width: 30%;
height: 60%;
border-radius: 30% 30% 120% 30%;
transform: rotate(130deg);
z-index: -1;
animation-duration: 3s;
animation-name: wave;
animation-iteration-count: infinite;
transform-origin:0% 0%;
animation-timing-function: linear;
}
@keyframes wave {
10% {
transform: rotate(110deg);
}
20% {
transform: rotate(130deg);
}
30% {
transform: rotate(110deg);
}
40% {
transform: rotate(130deg);
}
}
.left-hand {
top: 0%;
left: 75%;
background: var(--penguin-skin, gray);
width: 30%;
height: 60%;
border-radius: 30% 30% 30% 120%;
transform: rotate(-45deg);
z-index: -1;
}
.right-feet {
top: 85%;
left: 60%;
background: var(--penguin-beak, orange);
width: 15%;
height: 30%;
border-radius: 50% 50% 50% 50%;
transform: rotate(-80deg);
z-index: -2222;
}
.left-feet {
top: 85%;
left: 25%;
background: var(--penguin-beak, orange);
width: 15%;
height: 30%;
border-radius: 50% 50% 50% 50%;
transform: rotate(80deg);
z-index: -2222;
}
.right-eye {
top: 45%;
left: 60%;
background: black;
width: 15%;
height: 17%;
border-radius: 50%;
}
.left-eye {
top: 45%;
left: 25%;
background: black;
width: 15%;
height: 17%;
border-radius: 50%;
}
.sparkle {
top: 25%;
left:-23%;
background: white;
width: 150%;
height: 100%;
border-radius: 50%;
}
.blush-right {
top: 65%;
left: 15%;
background: pink;
width: 15%;
height: 10%;
border-radius: 50%;
}
.blush-left {
top: 65%;
left: 70%;
background: pink;
width: 15%;
height: 10%;
border-radius: 50%;
}
.beak-top {
top: 60%;
left: 40%;
background: var(--penguin-beak, orange);
width: 20%;
height: 10%;
border-radius: 50%;
}
.beak-bottom {
top: 65%;
left: 42%;
background: var(--penguin-beak, orange);
width: 16%;
height: 10%;
border-radius: 50%;
}
body {
background:#c6faf1;
}
.penguin * {
position: absolute;
}
< / style >
< div class = "penguin" >
< div class = "penguin-bottom" >
< div class = "right-hand" > < / div >
< div class = "left-hand" > < / div >
< div class = "right-feet" > < / div >
< div class = "left-feet" > < / div >
< / div >
< div class = "penguin-top" >
< div class = "right-cheek" > < / div >
< div class = "left-cheek" > < / div >
< div class = "belly" > < / div >
< div class = "right-eye" >
< div class = "sparkle" > < / div >
< / div >
< div class = "left-eye" >
< div class = "sparkle" > < / div >
< / div >
< div class = "blush-right" > < / div >
< div class = "blush-left" > < / div >
< div class = "beak-top" > < / div >
< div class = "beak-bottom" > < / div >
< / div >
< / div >
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```
< / div >
< / section >
## Solution
< section id = 'solution' >
```js
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// solution required
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```
< / section >