Learn Responsive Web Design by Building a Piano - Step 29

Tell us what’s happening:
Describe your issue in detail here.

I don’t really understand the @media query. Where should I add the .keys selector and width?

Thanks

Step 29

Task:
Within the @media query, add a .keys selector and set the width to 318px.
Your code so far

/* file: index.html */
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Piano</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link rel="stylesheet" href="./styles.css">
</head>
<body>
  <div id="piano">
    <img class="logo" src="https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg" alt="freeCodeCamp Logo" />
    <div class="keys">
      <div class="key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
      <div class="key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>

      <div class="key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
      <div class="key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>

      <div class="key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
      <div class="key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
      <div class="key black--key"></div>
    </div>
  </div>
</body>
</html>
/* file: styles.css */
html {
box-sizing: border-box;
}

*, *::before, *::after {
box-sizing: inherit;
}

#piano {
background-color: #00471b;
width: 992px;
height: 290px;
margin: 80px auto;
padding: 90px 20px 0 20px;
position: relative;
border-radius: 10px;
}

.keys {
background-color: #040404;
width: 949px;
height: 180px;
padding-left: 2px;
}

.key {
background-color: #ffffff;
position: relative;
width: 41px;
height: 175px;
margin: 2px;
float: left;
border-radius: 0 0 3px 3px;
}

.key.black--key::after {
background-color: #1d1e22;
content: "";
position: absolute;
left: -18px;
width: 32px;
height: 100px;
border-radius: 0 0 3px 3px;
}

.logo {
width: 200px;
position: absolute;
top: 23px;
}

@media (max-width: 768px) {
#piano, {
  width: 318px;
  
}

}
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.134 Safari/537.36

Challenge: Learn Responsive Web Design by Building a Piano - Step 29

Link to the challenge:

@media (max-width: 768px) {
  #piano {
    width: 358px;
  }
}

After the #piano selector add a .keys selector, inside it add the width property set to 318px


Example:

@media (max-width: 768px) {
  .card {
    width: 358px;
  }
  .card-header {
    margin-bottom: 0.3rem;
  }
}