styles.css

/*
Styles for HTML5 File Drag & Drop demonstration
Featured on SitePoint.com
Developed by Craig Buckler (@craigbuckler) of OptimalWorks.net
*/
* {box-sizing: border-box;}

body {
	margin: 0;
	font-family: Arial, Helvetica, sans-serif;
}

.topnav {
	overflow: hidden;
	background-color: #e9e9e9;
}

.topnav a {
	float: left;
	display: block;
	color: black;
	text-align: center;
	padding: 14px 16px;
	text-decoration: none;
	font-size: 17px;
}

.topnav a:hover {
	background-color: #ddd;
	color: black;
}

.topnav a.active {
	background-color: #2196F3;
	color: white;
}

.topnav .search-container {
	float: right;
}

.topnav input[type=text] {
	padding: 6px;
	margin-top: 8px;
	font-size: 17px;
	border: none;
}

.topnav .search-container button {
	float: right;
	padding: 6px;
	margin-top: 8px;
	margin-right: 16px;
	background: #ddd;
	font-size: 17px;
	border: none;
	cursor: pointer;
}

.topnav .search-container button:hover {
	background: #ccc;
}

@media screen and (max-width: 600px) {
	.topnav .search-container {
		float: none;
	}
	.topnav a, .topnav input[type=text], .topnav .search-container button {
		float: none;
		display: block;
		text-align: left;
		width: 100%;
		margin: 0;
		padding: 14px;
	}
	.topnav input[type=text] {
		border: 1px solid #ccc;
	}
}

article #timer{
	color: crimson;
}



body
{
	font-family: "Segoe UI", Tahoma, Helvetica, freesans, sans-serif;
	font-size: 90%;
	margin: 10px;
	color: #333;
	background-color: #fff;
}

h1, h2
{
	font-size: 1.5em;
	font-weight: normal;
}

h2
{
	font-size: 1.3em;
}

legend
{
	font-weight: bold;
	color: #333;
}

#filedrag
{
	display: none;
	font-weight: bold;
	text-align: center;
	padding: 1em 0;
	margin: 1em 0;
	color: #555;
	border: 2px dashed #555;
	border-radius: 7px;
	cursor: default;
}

#filedrag.hover
{
	color: #f00;
	border-color: #f00;
	border-style: solid;
	box-shadow: inset 0 3px 4px #888;
}

img
{
	max-width: 100%;
}

pre
{
	width: 95%;
	height: 8em;
	font-family: monospace;
	font-size: 0.9em;
	padding: 1px 2px;
	margin: 0 0 1em auto;
	border: 1px inset #666;
	background-color: #eee;
	overflow: auto;
}

#messages
{
	padding: 0 10px;
	margin: 1em 0;
	border: 1px solid #999;
}

#progress p
{
	display: block;
	width: 240px;
	padding: 2px 5px;
	margin: 2px 0;
	border: 1px inset #446;
	border-radius: 5px;
	background: #eee url("progress.png") 100% 0 repeat-y;
}

#progress p.success
{
	background: #0c0 none 0 0 no-repeat;
}

#progress p.failed
{
	background: #c00 none 0 0 no-repeat;
}