•<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="lib/w3.css"><body><div class="w3-container"> <div class="w3-panel w3-yellow w3-topbar w3-bottombar w3-border-amber"> <p>London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.</p> </div></div></body></html>