Websites/webkit.org/demos/payment-request/style.css

@supports (-webkit-appearance: -apple-pay-button) {
    .apple-pay-button {
    	display: inline-block;
        -webkit-appearance: -apple-pay-button;
        -apple-pay-button-type: buy;
        width: 50px;
    }
}

.apple-pay-not-supported::before {
    content: "Apple Pay not supported";
    color: grey;
}

.hidden {
    visibility: hidden;
}

#black-buttons > .apple-pay-button {
	-apple-pay-button-style: black;
}

#white-buttons > .apple-pay-button {
	-apple-pay-button-style: white-outline;
}

#demo {
	border: 1px solid black;
	border-radius: 5px;
	text-align: center;
}

#description {
 	font-family: -apple-system;
	font-style: italic;
	font-size: 20px;
}