body {
	color: black;
	background-color: white;
	margin: 0 0 0 0;
    }
    p {
	margin-left: 2em;
	margin-right: 2em;
	text-align: justify;
    }
    ul, dl, ol {
	margin-left: 2em;
	margin-right: 2em;
    }
    dt {
	margin-top: 1em;
	font-weight: bold;
    }
    h1 {
	padding: 4px;
	margin-top: 0;
	border-bottom: 1px solid black;
	font-size: 125%;
	background-color: #eee;
    }
    h2 {
	padding: 4px;
	margin-top: 4em;
	border-bottom: 1px solid #888;
	font-size: 100%;
	background-color: #eee;
    }
    pre {
	padding: 1em;
	border: 1px solid #888;
	background-color: #eee;
	margin-top: 1em;
	margin-bottom: 1em;
	margin-left: 6em;
	margin-right: 6em;
    }
    pre em {
	color: #060;
    }
    table {
	padding-left: 2em;
	padding-right: 2em;
	margin: auto;
	border: 1px solid #888;
	border-collapse: collapse;
	empty-cells: show;
    }
    table td {
	vertical-align: top;
	border: 1px dotted #ccc;
	background-color: #f4f4f4;
    }
    table.samples tr>th:first-child+th {
	background-color: #e0f0e0;
    }
    table.samples tr>td:first-child+td {
	background-color: #dfd;
    }
    table th {
	text-align: left;
	vertical-align: top;
	border: 1px dotted #aaa;
	border-bottom: 1px solid #aaa;
	background-color: #eee;
    }
    table td,
    table th {
	padding: 6px;
    }
    table td:first-child,
    table th:first-child {
	border-left: none;
    }
    form {
	border: 1px outset #eee;
	margin-left: 2em;
	margin-right: 2em;
	padding: 1em;
	background-color: #f4f4f4;
    }
    input:focus {
	border-color:black;
    }
    input:hover {
	background-color: #eef;
    }
    div.imgview {
	margin-left: 6em;
	margin-right: 6em;
	padding: 0.5em;
	font-size: 80%;
	border: 1px solid #888;
	background-color: #eee;
	text-align: center;
	font-style: italic;
	margin-bottom: 1em;
    }

    .ngproblem {
	background-color: #fdf;
    }