Add sold out banner

customize.css

/* Floor Plans Sold Out Red Banner */
.floorplans-loop .type-floorplans.no-units-available:before {
	background: #E4440F;
	content: "Sold out";
	top: 50%;
	left: 50%;
	position: absolute;
	z-index: 10;
	padding: 12px 17px;
	color: white;
	text-transform: uppercase;
	font-weight: bold;
	letter-spacing: 0.05em;
	line-height: 1;
	border-radius: 3px;
	transform: translateX( -50% ) translateY( -50% );
}