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<!DOCTYPE html>
<html>
<head>
<style> 
#main {
  width: 400px;
  height: 100px;
  border: 1px solid #c3c3c3;
  display: flex;
  justify-content: center;
}
#main div {
  width: 70px;
  height: 70px;
}
</style>
</head>
<body>
<h1>The justify-content Property</h1>
<p>The "justify-content: center;" aligns the flex items at the center of the container:</p>
<div id="main">
  <div style="background-color:coral;">1</div>
  <div style="background-color:lightblue;">2</div>
  <div style="background-color:pink;">3</div>
</div>
</body>
</html>