.float-button {
    border-radius: 50%;
    width: 20px;
    padding: 20px;
    font-size: 18px;
    bottom: 15px;
    background: #ccc;
    position: absolute;
    right: 17px;
    cursor: pointer;
}

.float-button .content {
    position: absolute;
    left: 0;
    top: 50%;
    height: 100%;
    width: 100%;
    text-align: center;
    margin-top: -14px;
    color: white;
}