         .slider {
                position: absolute;
                cursor: pointer;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: #ccc;
                -webkit-transition: 0.4s;
                transition: 0.4s;
                border-radius: 25px;
            }

            .slider:before {
                position: absolute;
                content: "";
                height: 26px;
                width: 26px;
 