/*css for colin-fang.github.io home page */

body {
	font-family: Arial, Helvetica, sans-serif;
	background-image: url("Blurred-Background-Sunset-3c-Free.jpg");
	background-repeat: repeat-x;
	opacity: 1;
	background-color: #556D79;
}

/*top navigation bar */
/* Add a black background color to the top navigation */
.topnav {
  background-color: #333;
  overflow: hidden;
}

/* Style the links inside the navigation bar */
.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}
/*drop down */
.drop {
	float: left;
	overflow: hidden;
}

.drop .dropper{
	font-size: 17px;
	border: none;
	outline: none;
	color: white;
	padding: 14px 16px;
	background-color: inherit;
	margin: 0;
}

/* Change the color of links on hover */
.topnav a:hover, .drop:hover .dropper {
  background-color: #ddd;
  color: black;
}

/* Add a color to the active/current link */
.topnav a.active {
  background-color: #007DDD;
  color: white;
}

.drop-content {
	top:3.5em;
	 display: none;
	 position: absolute;
	 background-color: #f9f9f9;
	 min-width:160px;
	 box-shadow:0px 8px 16px 0px rgba(0,0,0,0.2);
	 z-index: 1;
}

.drop-content a {
	float:none;
	color:black;
	padding: 12px 16px;
	text-decoration: none;
	display: block;
	text-align: left;
}

.drop-content a:hover {
	background-color: #ddd;
}

.drop:hover .drop-content {
	display: block;
}

.container{
	background-color: #cccccc;
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
	text-align: center;
}

.box{
	top: 20%;
	width: 400px;
	height: 300px;
	background-color: #cccccc;
	text-align: center;
}