body { 
	font-family: sans-serif;
	display: flex;
	align-items: center;
	justify-content: center;
	height: 100vh; text-align: center;
}

.btn {
	padding: 15px 25px;
	background: #007AFF;
	color: white;
	text-decoration: none;
	border-radius: 8px;
	font-weight: bold;
}

@media (prefers-color-scheme: dark) {
	body {
		background: black;
		color: white;
	}
}