#modal_wrapper.overlay:before {
			content: " ";
			width: 100%;
			height: 100%;
			position: fixed;
			z-index: 100;
			top: 0;
			left: 0;
			background: #000;
			background: rgba(0,0,0,0.7);
		}

		#modal_window {
			display: none;
			z-index: 200;
			position: fixed;
			left: 40%;
			top: 50%;
			width: 440px;
			overflow: auto;
			padding: 10px 20px;
			background: #fff;
			border: 5px double #999;
			border-radius: 10px;
			box-shadow: 0 0 10px rgba(0,0,0,0.5);
			color: black ; 
		}

		#modal_wrapper.overlay #modal_window {
			display: block;
		}