So I have this example file that I copied from textfixer.com.
If I put all the CSS and html into a single file, it works as expected.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style style="text/css">
.hoverTable{
width:100%;
border-collapse:collapse;
}
.hoverTable td{
padding:7px; border:#4e95f4 1px solid;
}
/* Define the default color for all the table rows */
.hoverTable tr{
background: #b8d1f3;
}
/* Define the hover highlight color for the table row */
.hoverTable tr:hover {
background-color: #ffff99;
}
</style>
</head>
<table class="hoverTable">
<tr>
<td>Text 1A</td><td>Text 1B</td><td>Text 1C</td>
</tr>
<tr>
<td>Text 2A</td><td>Text 2B</td><td>Text 2C</td>
</tr>
<tr>
<td>Text 3A</td><td>Text 3B</td><td>Text 3C</td>
</tr>
</table>
<body>
</body>
</html>
Here is the output:
Continue reading why does CSS work differently if it’s in its own file