style.css

body{
	width:100%;
	height: 100%;

}

* { 
	box-sizing: 		border-box;
	-moz-box-sizing: 	border-box;
	-webkit-box-sizing: border-box;
	-ms-box-sizing: 	border-box;
	-o-box-sizing: 		border-box;
 }

#dropzone{
	text-align: center;
	font-family: sans-serif;
	width:80%;
	height: 80%;
	border: 10px solid gray;
	/*border-radius: 15px;*/
	margin: 15px auto;
	padding: 30px;
	background-color: #DDD;
	-moz-transition: border, background 1s;
}

#dropzone.active{
	border: 10px solid green;
	border-radius: 0px;
	background-color: #9F9;
}

#or{
	margin: 5px auto;
	text-align: center;
	display: inline-block;
	width: 100%;
}

#fileSelect{
	margin: 5px auto;
	text-align: center;
	display: block;
	width: 250px;
	padding: 10px;
	background-color: gray;
	border: 10px solid #DDD;
	font-family: sans-serif;
	transition-property: border-color, background-color;  
	transition-duration: .5s;
	-webkit-transition-property: border-color, background-color;  
	-webkit-transition-duration: .5s; 
	-moz-transition-property: border-color, background-color;  
	-moz-transition-duration: .5s;
	-ms-transition-property: border-color, background-color;  
	-ms-transition-duration: .5s; 
	-o-transition-property: border-color, background-color;  
	-o-transition-duration: .5s; 
}
#fileSelect:hover{
	border: 10px solid gray;
	background-color: #DDD;
}
a {
	text-decoration: none;
	color: black;
}

li{
	border: 1px solid black;
	list-style: none;
	padding: 2px 5px;
	border-radius: 5px;
	display: inline-block;
	width: auto;
	margin: 2px 5px;
}

.hide{
	display: none;
}