<html><head><style>.center { line-height: 200px; height: 200px; border: 3px solid green; text-align: center;}.center p { line-height: 1.5; display: inline-block; vertical-align: middle;}</style></head><body><h2>Centering</h2><p>In this example, we use the line-height property with a value that is equal to the height property to center the div element:</p><div class="center"> <p>I am vertically and horizontally centered.</p></div></body></html>