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tutorial-20.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS Variables/Custom Properties</title>
<style>
:root{
/* for var global var */
--primary-color:blue;
--danger-color: red ;
--maxw: 333px;
}
.box{
--box-color:rgb(164, 164, 211);
width: 200px;
height: 200px;
background-color:var(--primary-color);
border: 2px solid red;
box-shadow: 3px 3px var(--box-color);
margin: 6px 6px;
}
.container{
max-width: var(--maxw);
background-color: var(--danger-color);
display: flex;
margin: auto;
align-items: center;
justify-content: center;
/* background-color: var(--box-color); Not used b/cs local variable*/
}
</style>
</head>
<body>
<div class="container">
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
</div>
</body>
</html>