.container {
    display: block;
    width: 200px;
    height: 100px;
    margin: 20px auto;
    position: relative;
    float: left;
    clear: both;
}

.button {
    display: block;
    background: beige;
    margin: 20px;
    width: 100px;
    height: 100px;
    cursor: pointer;
    border-radius: 50%;
    box-shadow: 0 3px 20px rgba(0, 0, 0, .25)
}

.button:hover {
    box-shadow: inset 0 3px 20px rgba(1, 1, 5, .2)
}