body {
	text-align:justify;
}
h3 {
	background: #eef;
}
a:hover {
	background: #cacaff;
	color: green;
	text-decoration: underline;
}
kbd {
	background: #eee;
	color: #f00;
	font-weight:bold;
}
div.shift {
	margin-left: 2em;
}
div.qa {
	margin-left: 2em;
}
div.question {
	background: #ffb;
}
div.answer{
	margin-left: 2em;
	background: #bfb;
}
div.example {
	background: #eee;
}
table {
        border-collapse:collapse;
        border: 1px solid black;
}
tr {
        border:2px solid black;
}
tr.gray {
        background:#eee;
}
td {
        padding: 4px;
}
tr:hover {
        border:2px solid red;
        background: #ffc;
}
th {
        font-weight:bold;
        background:silver;
}