main.css

* {
  padding:0px;
  margin: 0px;
}

html, body {
	background: -webkit-radial-gradient(60px 45px, circle farthest-corner, #666, #333);
	height: 100%;
}

a, a:visited {
	text-decoration: none;
	border: none;
	color: inherit;
	transition: color 0.25s;
}

a:hover {
	color: rgba(0, 0, 0, 0.8);
	cursor: pointer;
}

input:focus {
    outline: none;
}

input[type=text] {
	font-size: 25px;
    width: 85px;
	padding: 5px;
	margin-left: 10px;
    border: none;
	background: transparent;
}

#main {
	overflow: auto;
	padding-bottom: 50px;
}

#wrap {
	width: 800px;
	margin: 0 auto;
	min-height: 100%;
}

#wrap #solution {
	width: 300px;
	border-radius: 5px;
	border: 10px solid rgba(0, 0, 0, .4);
	background: rgba(255, 255, 255, .2);
	margin-right: 20px;
	float:right;
	display:none;
	text-align: center;
	margin-top: 20px;
	padding-bottom: 10px;
}

#wrap #solution > span {
	font-size: 1.5em;
	margin-bottom: 10px;
}

#wrap #solution > h3 {
	font-size: 1.2em;
	padding: 10px;
	margin-bottom: 5px;
	background: rgba(255, 255, 255, .1);
}

#wrap form {
	float: left;
	margin-top : 20px;
	background-color: rgba(255, 255, 255, .1);
	padding: 40px;
	padding-top: 50px;
	border-radius: 5px;
	border: 10px solid rgba(0, 0, 0, .2);
	margin-left: 20px;
}

#wrap form > div {
	line-height: 40px;
	background: rgba(255, 255, 255, .4);
	padding-left: 10px;
	border-radius: 10px 0px 0px 10px;
	margin-bottom: 10px;
}

#wrap form > div > span {
	width: 12px;
	padding-right: 5px;
	border-right: 1px solid rgba(0, 0, 0, .2);
}

#wrap #help {
	width: 370px;
	float: right;
	border-radius: 5px;
	padding: 20px;
	background-color: rgba(255, 255, 255, .3);
	border: 10px solid rgba(0, 0, 0, .3);
	margin-top: 20px;
	font-size: 1.2em;
	line-height: 200%;
	margin-right: 20px;
}

.highlight {
	color: rgba(0, 0, 0, 1);
	font-weight: 900;
	font-size: 1.25em;
}

#wrap #solution .code {
	background: rgba(255, 255, 255, .1);
	border: 2px solid rgba(0, 0, 0, .1);
	padding: 9px;
	border-radius: 3px;
	border: 1px solid rgba(0, 0, 0, 0.15);
	font-family: "Courier New", monospace;
}

body footer {
	line-height: 20px;
	height: 50px;
	text-align: left;
	font-size: 20px;
	font-family: Arial, sans-serif;
	clear: both;
	margin-top: -50px;
	margin-left: 30px;
	color: rgba(0, 0, 0, .5);
	letter-spacing: 0.2em;