canvas {
    border: 1px solid #ccc;
    margin: 30px;
    margin-top: 5px;
}

.color-select {
    margin: 1px;
    margin-top: 10px;
    width : 30px;
    height : 30px;
    display:inline-block;
}

.color-select:first-child {
    margin-left: 30px;
}

.clearBtn {
    margin-top: 12px;
    margin-left: 15px;
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
    border-radius:5px;
    color: green;
    background-color: #EDEDED;
    font-size: 15px;
    text-decoration: none;
    cursor: poiner;
    height: 30px;
    position: absolute;
}

/*
 Transforming nested lists to pretty tree
 
 <div class="tree">
    <ul>
        <li>
            <ul>
            ...
            </ul>
        </li>
        ...
    </ul>
 </div>
 
Source: http://thecodeplayer.com/walkthrough/css3-family-tree

Some other advices about displaying trees: http://stackoverflow.com/questions/1695115/how-do-i-draw-the-lines-of-a-family-tree-using-html-css
*/
.tree ul {
	padding-top: 20px;
    position: relative;
	
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
}

.tree li {
    white-space: nowrap;
	float: left;
    text-align: center;
	list-style-type: none;
	position: relative;
	padding: 20px 5px 0 5px;
	
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
}

/*We will use ::before and ::after to draw the connectors*/

.tree li::before, .tree li::after{
	content: '';
	position: absolute;
    top: 0;
    right: 50%;
	border-top: 1px solid #ccc;
	width: 50%;
    height: 20px;
}
.tree li::after{
	right: auto;
    left: 50%;
	border-left: 1px solid #ccc;
}

/*We need to remove left-right connectors from elements without
 any siblings*/
.tree li:only-child::after, .tree li:only-child::before {
	display: none;
}

/*Remove space from the top of single children*/
.tree li:only-child{
    padding-top: 0;
}

/*Remove left connector from first child and
 right connector from last child*/
.tree li:first-child::before, .tree li:last-child::after{
	border: 0 none;
}
/*Adding back the vertical connector to the last nodes*/
.tree li:last-child::before{
	border-right: 1px solid #ccc;
	border-radius: 0 5px 0 0;
	-webkit-border-radius: 0 5px 0 0;
	-moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after{
	border-radius: 5px 0 0 0;
	-webkit-border-radius: 5px 0 0 0;
	-moz-border-radius: 5px 0 0 0;
}

/*Time to add downward connectors from parents*/
.tree ul ul::before{
	content: '';
	position: absolute;
    top: 0;
    left: 50%;
	border-left: 1px solid #ccc;
	width: 0;
    height: 20px;
}

.tree li a{
	border: 1px solid #ccc;
	padding: 5px 10px;
	text-decoration: none;
	color: #666;
	font-family: arial, verdana, tahoma;
	font-size: 11px;
	display: inline-block;
	
	border-radius: 5px;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
	
	transition: all 0.5s;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
}

/*Time for some hover effects*/
/*We will apply the hover effect the the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
	background: #c8e4f8;
    color: #000;
    border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before{
	border-color:  #94a0b4;
}