<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference</title>
<style>
.clamp {
  display: -webkit-box;
  -webkit-box-orient: horizontal;
  font: 16px / 32px serif;
  white-space: pre;
  padding: 4px 0;
  background-color: yellow;
  writing-mode: vertical-rl;
}
</style>
<div class="clamp">Line 1
Line 2
Line 3
Line 4
Line 5</div>