modal.css

  /* The Modal (background) */
  .modal {
	/* display: none; /* Hidden by default */
	position: fixed; /* Stay in place */
	z-index: 1; /* Sit on top */
	left: 0;
	top: 0;
	width: 100%; /* Full width */
	height: 100%; /* Full height */
	overflow: auto; /* Enable scroll if needed */
	background-color: rgb(0,0,0); /* Fallback color */
	background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
  }
  
  /* Modal Content/Box */
  .modal-content {
	background-color: #fefefe;
	margin: 15% auto; /* 15% from the top and centered */
	padding: 20px;
	border: 1px solid #888;
	width: 80%; /* Could be more or less, depending on screen size */
  }
  
  /* The Close Button */
  .close {
	color: #aaa;
	float: right;
	font-size: 28px;
	font-weight: bold;
  }
  
  .close:hover,
  .close:focus {
	color: black;
	text-decoration: none;
	cursor: pointer;
  }