style.less

body{
	background: lightgray;
}
.wrap{

	max-width: 64em;
	text-align: center;
	margin: auto;

	> *{
		text-align: left;
	}

	h1{
		text-align: center;
	}

	.ldt{

		background: white;
		min-height: 10em; 

		&:first-of-type{
			max-height: 10em;
		}
		pre{
			background: white;
			margin: 0 0 1em 0;
		}
		
		.string { color: green; }
		.keyword { font-weight: bold; display: inline-block; margin-bottom: -1px; }
		.variable { color: cyan; }
		.define { color: blue; }
		.number { color: navy; }
		.comment { color: silver; }
	}
}

textarea{
	
	display: block;
	width: 100%;
	font-family: monospace;
}
button{
	padding: .3em 3em;
	margin: 1em;
}
.tab{
	position: relative;
	&:before{
		content: "";
		display: inline;
		position: absolute;
		top: 0;
		border-bottom: solid 1px lightgrey;
		height: .5em;
		left: 2px;
		right: 2px;
	}
}
.space{
	position: relative;
	&:before{
		content: "";
		display: inline;
		position: absolute;
		top: .5em;
		left: .25em;
		background: lightgrey;
		height: 2px;
		width: 1px;
	}
}
.option-group{
	display: inline-block;
	vertical-align: top;
	margin-right: 1em;

	input:not([disabled]),
	input:not([disabled])+label{
		cursor: pointer;
	}
}