<!DOCTYPE html>
<html>
<head>
<title>CSS class</title>
<style>
.line_1, .line_2, .ine_3{
font-size:16px;
}
.line_1 {
color: purple;
margin-left: 20px;
}
.line_2 {
font-size: 20px;
background-color: #FF6633;
}
.line_3 {
font-style: italic;
font-weight: bold;
}
</style>
</head>
<body>
<p class="line_1">This is a first paragraph.</p>
<div class="line_2">This is a first section.</div>
<div class="line_3">This is a second section.</div>
</body>
</html>
