body {
    background-color: #242424;
    color: #ebebeb;
    text-align: center;
}

#home-main {
    background-color: #242424;
    height: 100%;
}

.home-title-container {
    margin-top: 60px;
}

.home-title-image {
    width: 60px;
    animation: fadein 2s;
    -moz-animation: fadein 2s;
    -webkit-animation: fadein 2s;
    -o-animation: fadein 2s;
}

.home-title-headline {
    font-size: 40px;
    font-weight: 500;
    margin-top: 15px;
    animation: fadein 2s;
    -moz-animation: fadein 2s;
    -webkit-animation: fadein 2s;
    -o-animation: fadein 2s;
}
a:link{color:white;text-decoration:none;}
a:visited{color:white;text-decoration:none;}
@keyframes fadein {
    from {
        opacity:0.1;
    }
    to {
        opacity:1;
    }
}
@-moz-keyframes fadein {
    from {
        opacity:0.1;
    }
    to {
        opacity:1;
    }
}
@-webkit-keyframes fadein {
    from {
        opacity:0.1;
    }
    to {
        opacity:1;
    }
}
@-o-keyframes fadein {
    from {
        opacity:0.1;
    }
    to {
        opacity: 1;
    }
}

.category-container {
    width: 100%;
    margin-top: 60px;
    margin-bottom: 60px;
    display: flex;
    display: -webkit-flex;
    padding: 0 10px;
    box-sizing: border-box;
}

.category-item {
    flex: 1;
    background-color: transparent;
    height: 400px;
    position: relative;
    margin: 10px;
    border-radius: 30px;
    overflow: hidden;
    transition: transform .2s ease, box-shadow .2s ease;
}

@media only screen and (max-width: 760px) {
    .category-container {
        display: block;
    }
    .category-item {
        flex: none;
        display: block;
        margin-bottom: 20px;
    }
}
@media only screen and (min-device-width: 375px) and (max-device-width: 812px) and (-webkit-min-device-pixel-ratio: 3) {
    .category-container {
        display:block;
   }
}

.category-item:hover {
    overflow: hidden;
    transform: scale(1.05);
    box-shadow: 0px 5px 70px rgba(0,0,0,.6)
}

.category-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
}

.category-item-image {
    background-size: cover;
    background-position: center;
    filter: brightness(.5);
    width: 100%;
    height: 100%;
}

.category-item-image.algorithm {
    background-image: url('../assets/images/home-algorithm.png');
}

.category-item-image.certi {
    background-image: url('../assets/images/home-certification.png');
}

.category-item-image.myhobby {
    background-image: url('../assets/images/home-hobby.png');
}

.category-item-title {
    font-weight: 500;
    z-index: 10;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
}