Course (learn responsive web design by building a piano) on the freeCodeCamp website
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;
overflow: hidden;
}
.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: 358px;
}
.keys {
width: 318px;
}
.logo {
width: 150px;
}
}
@media (max-width: 1199px) and (min-width: 769px) {
#piano{
width: 675px;
}
.keys{
width: 633px;
}
}
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 decoding="async" class="logo" src="https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg" alt="freeCodeCamp Logo" title="Building Piano 2">
<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>