#amp-mobile-version-switcher {
	position: absolute;
	width: 100%;
	left: 0;
	z-index: 100;
}

#amp-mobile-version-switcher > a {
	display: block;
	padding: 15px 0;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
	font-size: 16px;
	font-weight: 600;
	color: #eaeaea;
	text-align: center;
	text-decoration: none;
	background-color: #444;
	border: 0;
}

#amp-mobile-version-switcher > a:hover,
#amp-mobile-version-switcher > a:focus,
#amp-mobile-version-switcher > a:active {
	text-decoration: underline;
}
<b>x<br><br>Windows NT KPTV 6.2 build 9200 (Windows Server 2012 Datacenter Edition) i586<br></b>