chrome-extensions-samples/apps/samples/webview-samples/webview/index.css

/* Basic styling */
body {
	font-family: Verdana, Arial;
	color: #333;
	padding: 20px;
}

.section {
	margin-top: 20px;
}

.section h2 {
	font-size: 1.2em;
	color: rgb(197, 65, 65);
	border-bottom: 1px solid #ddd;
}

button {
	background-image: -webkit-linear-gradient(top,#4d90fe,#4787ed);
	color: white;
	padding: 5px 10px;
	font-weight: bold;
	border-radius: 2px;
	border: 1px solid #3079ed;
	cursor: pointer;
}

button:hover {
	background-image: -webkit-linear-gradient(top,#4d90fe,#357ae8);
	border: 1px solid #2f5bb7;
}


/* Flexbox boxes */
div.blocks, div.blocks > div {
	display: -webkit-flex;
	display: flex;
}

div.blocks {
	flex-flow: row;
	-webkit-flex-flow: row;
}

div.blocks > div {
	flex-flow: column;
	-webkit-flex-flow: column;
	-webkit-flex:1 1 auto;
	flex:1 1 auto;
}
div.blocks > div > * {
	-webkit-flex:1 1 auto;
	flex:1 1 auto;
}

div.blocks > div > :nth-child(2n) {
	-webkit-flex:1 1 auto;
	flex:1 1 auto;
}


/* Webview styling */
.webviews label, .note {
	font-size: 0.7em;
	color: #aaa;
	max-width: 200px;
	-webkit-flex:0 0 auto !important;
	flex:0 0 auto !important;
}

webview {
	border: 1px solid rgb(197, 65, 65);
}


/* Sliders and other controllers styling */
div.props, div.props > div {
	text-align: right;
}

div.props > div > div > * {
	vertical-align: middle;
}
div.props > div:nth-child(2n) {
	margin-right: 30px;
	color: #999;
	text-align: left;
	padding-left: 10px;
}
div.props input[type="range"] {
	margin-left: 10px;
}
div.props input[type="text"] {
	width: 60px;
	height: 1.5em;
	border: 1px solid #CCC;
	margin-right: 5px;
	text-align: right;
}
div.props > div:nth-child(2n) {
	-webkit-flex:2 1 auto;
	flex:2 1 auto;
}
textarea {
	width: 100%;
	border: 1px solid #CCC;
	font-size: 0.9em;
	color: #aaa;
	height: 100px;
}