Try it Yourself: CSS Units

CSS Units

<!DOCTYPE html>
<html>
<head>
<style>
.card {
  width: 90%;
  max-width: 40rem;
  padding: 1.5rem;
  border: 1px solid #ddd;
  font-size: 1rem;
}
</style>
</head>
<body>

<div class="card">
  <h3>Plan Details</h3>
  <p>This card mixes percentage, rem, and pixel units.</p>
</div>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<style>
.card {
  width: 90%;
  max-width: 40rem;
  padding: 1.5rem;
  border: 1px solid #ddd;
  font-size: 1rem;
}
</style>
</head>
<body>

<div class="card">
  <h3>Plan Details</h3>
  <p>This card mixes percentage, rem, and pixel units.</p>
</div>

</body>
</html>