.ms-slide.frontiers:hover .explore-frontiers,
.ms-slide.frontiers:hover .explore-frontiers-bg{
    opacity: 0;
    z-index: -10;
}

.explore-frontiers{
    position: absolute;
    font-family: 'TungstenCondensedBold', Arial, sans-serif;
    font-size: 96px;
    left: 50%;
    top: 50%;
    z-index: 999;
    opacity: 1;
    -webkit-transition: all 400ms ease-out;
    -moz-transition: all 400ms ease-out;
    -ms-transition: all 400ms ease-out;
    -o-transition: all 400ms ease-out;
    transition: all 400ms ease-out;

    -webkit-transform: translateY(-50%) translateX(-50%);
    -moz-transform: translateY(-50%) translateX(-50%);
    -ms-transform: translateY(-50%) translateX(-50%);
    -o-transform: translateY(-50%) translateX(-50%);
    transform: translateY(-50%) translateX(-50%);
    color: #fff;
    text-align: center;
    pointer-events: none;
    line-height: normal;
}
.explore-frontiers-bg{
    left: 0;
    top: 0;
    opacity: 0.8;
    z-index: 99;
    background-image: url(../images/slider-bg2.jpg);
    background-position: center center;
    background-size: cover;
    width: 100%;
    height: 100%;
    position: absolute;
    -webkit-transition: all 400ms ease-out;
    -moz-transition: all 400ms ease-out;
    -ms-transition: all 400ms ease-out;
    -o-transition: all 400ms ease-out;
    transition: all 400ms ease-out;
    pointer-events: none;
}

.ms-slide.frontiers .ms-layer{
    height: 100%;
    position: relative;
}

.ms-slide.frontiers .ms-layer a{
    width: 33.3333%;
    height: 33.3333%;
    display: block;
    position: relative;
}

.ms-slide.frontiers .ms-layer a .overlay > span{
    position: relative;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    -o-transform: translateY(-50%);
    transform: translateY(-50%);

    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
    display: block;
    font-size: 2.6vw;
}

.ms-slide.frontiers .ms-layer a .overlay{
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background-color: rgba(25, 26, 39, 0.8);
    font-family: 'latobold', Arial, sans-serif;
    font-size: 24px;
    text-align: center;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: auto 80%;

    -webkit-transition: all 300ms ease-out;
    -moz-transition: all 300ms ease-out;
    -ms-transition: all 300ms ease-out;
    -o-transition: all 300ms ease-out;
    transition: all 300ms ease-out;
}

.ms-slide.frontiers .ms-layer a:hover .overlay{
    background-color: rgba(25, 26, 39, 0);
    background-image: url(../images/video-play.png);
}

.ms-slide.frontiers .ms-layer a:hover .overlay > span{
    opacity: 0;
}

@media (max-width: 640px){
    .ms-slide.frontiers .ms-layer a{
        width: 50%;
    }

    .ms-slide.frontiers .ms-layer a .overlay{
        background-size: 50% auto;
    }

    .ms-layer .front1 img{
        width: auto;
        height: 100%;
    }
}

@media (min-width: 1180px){
    .ms-slide.frontiers .ms-layer a .overlay > span{
        font-size: 31px;
    }
}