.container{
    float:left;
    width:600px;
    height:900px;
    overflow:hidden;
    margin:0 50px;
    color:red;
    font-size:13px;
    padding:10px;
    background: url('folder.png') top left no-repeat;
    background-size:100% 100%;
    /*declare shape using the shape function circle()*/
    shape-inside: circle(160px at 400px 60px);
}

#t{
border: 10px solid red;
padding: 10px;
border-radius: 20px;
width:80%;
}
#tt{
width:100%;
}

#nav {
	width: 12em;
	border-right: 1px solid #000;
	padding: 0 0 1em 0;
	margin-bottom: 1em;
	font-family: 'Trebuchet MS', 'Lucida Grande', Verdana, Arial, sans-serif;
	background-color: rgb(255,230,0);
	color: #333;
        border-radius: 20px;
}

#button ul {
	list-style: none;
	margin: 0;
	padding: 0;
	border: none;
        
}
	
#button li {
	border-bottom: 1px solid #90bade;
	margin: 0;
	list-style: none;
	list-style-image: none;
	
        
}
	
#button li a {
	display: block;
	padding: 5px 5px 5px 0.5em;
	border-left: 10px solid #1958b7;
	border-right: 10px solid #508fc4;
	background-color: rgb(255,230,0);
	color: #000;
	text-decoration: none;
	width: 100%;
	border-radius: 20px;
	text-align: center;
}

html>body #button li a {
	width: auto;
}

#button li a:hover {
	border-left: 10px solid #1c64d1;
	border-right: 10px solid #5ba3e0;
	border-style: inset;
}