.spn-direction-sign {
    position: fixed;
    display: inline-block;
    border: 0;
    width: 66px;
    height: 68px;
    top: 50%;
    margin-top: -34px;
    z-index: 121;
    color: white;
    font-size: 32px;
    text-align: center;
    line-height: 68px;
    background-color: #00a4e4;
    opacity: 0;
   -moz-opacity: 0;

   -webkit-transition: opacity 0.3s linear, -webkit-transform 0.3s linear;
   -moz-transition: opacity 0.3s linear, -mox-transform 0.3s linear;
    -ms-transition: opacity 0.3s linear, -ms-transform 0.3s linear;
     -o-transition: opacity 0.3s linear, -o-transform 0.3s linear;
        transition: opacity 0.3s linear, transform 0.3s linear;
}



    .spn-direction-sign.next {
        right: 0;
        -webkit-transform: translate(100%);
           -moz-transform: translate(100%);
            -ms-transform: translate(100%);
             -o-transform: translate(100%);
                transform: translate(100%);

    }
        .spn-direction-sign.next::after {
            content: "\25b6";
        }
    .spn-direction-sign.prev {
        left: 0;
        -webkit-transform: translate(-100%);
        -moz-transform: translate(-100%);
         -ms-transform: translate(-100%);
          -o-transform: translate(-100%);
             transform: translate(-100%);
    }
        .spn-direction-sign.prev::after {
            content: "\25c0";
        }
    .spn-direction-sign.visible {
        opacity: 1;
        -webkit-transform: translate(0);
           -moz-transform: translate(0);
            -ms-transform: translate(0);
             -o-transform: translate(0);
                transform: translate(0);

    }


.spn-freezing-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #000;
     opacity: 0.5;
   -moz-opacity:0.5;
   -khtml-opacity: 0.5;
   -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
   filter: alpha(opacity=50);
}

    .spn-freezing-overlay::after {
        position: absolute;
        width: 100%;
        top: 50%;
        font-size: 32px;
        text-align: center;
        color: white;
        content: "Loading..."
    }