friendica-addons/cookienotice/templates/cookienotice.tpl

<style type="text/css">
	#cookienotice-box {
		display: none;
		position: fixed;
		z-index: 10000;
		bottom: 0px;
		left: 0;
		width: 100%;
		background-color: #101010;
		color: #f0f0f0;
		padding: 2em 1em;
		text-align: center;
	}
	#cookienotice-ok-button {
		border: 1px solid darkgoldenrod;
		background-color: gold;
		color: #101010;
		min-width: 80px;
		padding: .5em .1em;
	}
</style>
<div id="cookienotice-box"><p>{{$text}}</p><button id="cookienotice-ok-button">{{$oktext}}</button></div>