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CSS: Card Selection Changes Background
Change the background when a card is selected using only HTML and CSS.
Here is a way to change the background when the user selects a card to see. This is NOT compatible with Internet Explorer.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Background</title>
<style>
* {
box-sizing: border-box;
}
body {
margin: 0;
padding: 0;
font-family: sans-serif;
background-color: black;
background-image: url(https://picsum.photos/id/1044/1920/1080);
background-size: cover;
background-repeat: no-repeat;
background-position: center center;
}
.home {
position: absolute;
bottom: 15px;
left: 25px;
z-index: 1;
}
.home a {
color: rgba(255,255,255,0.5);
text-decoration: none;
font-weight: 900;
letter-spacing: 2px;
text-transform: uppercase;
}
main {
width: 100%;
height: 100vh;
overflow: hidden;
}
.col {
width: 33.333333%;
float: left;
border-left: 2px solid rgba(0,0,0,0.33);
height: 100%;
z-index: 0;
}
.col:nth-child(1) {
border-left: none;
}
.num {
position: relative;
height: 100%;
}
.num h1 {
font-size: 12.5vmax;
text-align: center;
margin: 0;
background-color: rgba(0,0,0,0.2);
position: absolute;
width: 100%;
top: 50%;
transform: translateY(-50%);
padding: 4vmin;
}
.num a {
display: block;
text-decoration: none;
color: rgba(0,0,0,0.5);
transition: .5s;
}
.num a:hover {
color: rgba(0,0,0,0.75);
border: 1vmin solid rgba(0,0,0,0.75);
}
.card {
position: absolute;
min-height: 33vh;
overflow: hidden;
top: 50%;
transform: translateY(-50%);
padding: 2vmin;
background-color: rgba(0,0,0,0.67);
color: silver;
text-align: center;
transition: 1s;
visibility: hidden;
opacity: 0;
}
.card h2 {
font-size: 5vmin;
margin: 0;
padding: 0;
}
.card p {
font-size: 3vmin;
}
.back {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
z-index: -1;
pointer-events: none;
background-size: cover;
background-repeat: no-repeat;
background-position: center center;
visibility: hidden;
opacity: 0;
transition: .5s;
}
.back-1 {
background-image: url(https://picsum.photos/id/10/1920/1080);
}
.back-2 {
background-image: url(https://picsum.photos/id/296/1920/1080);
}
.back-3 {
background-image: url(https://picsum.photos/id/137/1920/1080);
}
.col:target .back,
.col:target .card {
visibility: visible;
opacity: 1;
}
</style>
</head>
<body>
<main>
<div class="col" id="col-1">
<div class="num">
<h1><a href="#col-1">1</a></h1>
<div class="card">
<h2>Lorem ipsum dolor sit amet.</h2>
<p>Lorem ipsum dolor, sit amet consectetur
sit amet consectetur, adipisicing elit.
Dicta, voluptas?</p>
</div>
</div>
<div class="back back-1"></div>
</div>
<div class="col" id="col-2">
<div class="num">
<h1><a href="#col-2">2</a></h1>
<div class="card">
<h2>Lorem ipsum dolor sit amet.</h2>
<p>Lorem ipsum dolor, sit amet consectetur
adipisicing elit. Facere, incidunt
repudiandae voluptate?</p>
</div>
</div>
<div class="back back-2"></div>
</div>
<div class="col" id="col-3">
<div class="num">
<h1><a href="#col-3">3</a></h1>
<div class="card">
<h2>Lorem ipsum dolor sit amet.</h2>
<p>Lorem ipsum dolor, sit amet consectetur
repudiandae voluptate?</p>
</div>
</div>
<div class="back back-3"></div>
</div>
</main>
<div class="home"><a href="#!">home</a></div>
</body>
</html>
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