style.css

/* --- reset and general --- */

* { margin: 0; padding: 0; }

body {
	font-family: Serif;
	line-height: 20px;
	color: #333;
	background: #fff;
}

h1,h2 {
	font-family: Sans-Serif;
	letter-spacing: -.04em;
	color: #000;
}

h1 { font-size: 80px; line-height: 60px; }
h2 { font-size: 30px; line-height: 40px; }

body.dropit { background: #eee; }

body.dropit:after {
	content: "Drop it!";
	font-family: sans-serif;
	position: fixed; 
	z-index: 200; 
	top: 50%; 
	left: 50%; 
	background: red; 
	color: #fff; 
	display: block; 
	width: 200px; 
	height: 200px; 
	border-radius: 110px; 
	line-height: 200px; 
	text-align: center; 
	font-weight: bold; 
	font-size: 40px; 
	margin: -100px 0 0 -100px;
	border: 5px solid #fff;
	box-shadow: 0 0 15px rgba(0,0,0,.5), 0 0 100px #000;
}

body.error h1, body.error p, body.error pre { margin: 0 0 15px 0; }

body.error pre {
	background: #eee;
	padding: 15px 30px 15px 15px;
}

a {
	color: #E90094;
	text-decoration: none;
}

/* --- loading --- */

body.loading:before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	height: 100%;
	width: 100%;
	color: #666;
	background: #fff url("images/loading.gif") center center no-repeat;
	text-align: center;
	z-index: 1000;
}

/* --- nav --- */

nav {
	position: fixed;
	bottom: 0;
	right: 0;
	background: #ccc;
	font-family: sans-serif;
	padding: 2px 10px 2px 8px;
	z-index: 200;
	border-radius: 5px 0 0 0;
	font-size: 12px;
}

nav * { margin: 0 0 0 2px; }
nav a { font-weight: bold; margin: 0 0 0 8px; }
nav label { cursor: pointer; }

/* --- ace editor stuff --- */

div[role="input"] section {
	position: relative;
	height: 33.4%;
	margin: 0 10px 0 0;
	overflow: hidden;
}

div[role="input"] pre {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
}

section label {
	position: absolute;
	top: 0;
	right: 15px;
	color: #000;
	background: rgba(255,255,255,.75);
	font-family: sans-serif;
	padding: 2px 7px;
	z-index: 100;
	border-radius: 0 0 0 5px;
	font-size: 14px;
	transition: all .2s ease;
}

pre.focus + label { top:  -30px; }

pre.invalid + label {
	top: 0;
	background: #E00000;
}

pre.invalid + label:before { content: "Invalid "; }

/* --- layout --- */

div[role="input"], div[role="output"] {
	position: absolute;
	top: 20px;
	left: 20px;
	min-height: 400px;
}

div[role="input"] {
	width: auto; 
	bottom: 20px;
	width: 320px;
}

div[role="output"] {
	right: 20px;
	left: 340px;
	bottom: 20px;
}

@media all and (min-width: 1200px) {
	div[role="input"] { width: 420px; }
	div[role="output"] { left: 440px; }
}
@media all and (min-width: 1600px) {
	div[role="input"] { width: 620px; }
	div[role="output"] { left: 640px; }
}

/* --- output --- */

#ifrOutput {
	width: 100%;
	border: none;
	outline: 1px dashed #ccc;
	height: 100%;
}

/* --- view overrides (default=split) --- */

body[role="edit"] div[role="input"] { width: auto; right: 10px; }
body[role="edit"] div[role="input"] section {
	width:  33.3%;
	float: left;
	height: 100%;
	margin: 0;
}
body[role="edit"] div[role="output"] { display: none; }

body[role="result"] div[role="input"] { display: none; }
body[role="result"] div[role="output"] { left: 20px; }