button parctice

HTML

<button>+</button>

CSS

button {
    width: 60px;
    height: 60px;
    border: 10px solid transparent;
	color: white;
	font: 30px/1.25 Arial;
	background: #58a;
    background-clip: padding-box;
	border-radius: 50%;
    cursor: pointer;
}