body {
	background-image:url(image/fon.jpg);
    color: #000000;
    font: 1em/1.4 Arial, sans-serif;
}
h1, h2, h3 {
	font-family: Georgia, Times, serif;
	text-align:center;
}
ul {
	list-style-type:square;
}
img {
	margin: 5px;
}
code {
	font: bolder 1em/1.4 "Courier New", Courier, monospace;
}
a {
	text-decoration: none;
}
a:hover, a:active {
	color: #ba1000;
	text-decoration: underline;
}

.example {
	font: 14px "Courier New", Courier, monospace;
}
.attribute, .property {
	color:#e6550d;
	white-space: nowrap;
}
.at-rule {
	color:#e6550d;
}
.value {
	color: #31a354;
}
.element {
	color: navy;
}
code.element::before {
	content: "<";
}
code.element::after {
	content: ">";
}
.center{
	width: 1200px;
	margin: 0 auto;
}