.tool {
    position: fixed;
    right: 50px;
    bottom: 180px;
    color: #996699;
    text-shadow: 0 4px 3px #999999;
    -webkit-transition-duration: 0.2s;
    transition-duration: 0.2s;
}

.tool:hover {
	color: white;
	text-shadow: 0 0 5px #996699;
}