/* Header */
header {  
    background-image: url("images/books.png");
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;  
    position: relative;
    overflow: hidden;
}
.headerBackground {
    background: rgba(21,33,37,.8);
    padding: 140px 60px;
}
.headerBg {
    max-width: 1600px;
    margin: 0 auto;    
    position: relative;
}
.headerWrapper {
    display: flex;
    max-width: 1600px;
    margin: 0 auto;
}
.headerLeftBox {
    position: relative;
    flex: 0 50%;
}
.headerRightBox {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 50%;
    left: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.headerRightBox img {
    display: block;
    max-width: 100%;
    height: auto;
    flex-shrink: 0;
    align-self: flex-start;
    -webkit-filter: drop-shadow(-7px 7px 31px rgba(0,0,0,0.40));
    filter: drop-shadow(-7px 7px 31px rgba(0,0,0,0.40));
}
/* Left box */
.headerTitle, .headerTitle2 {
    color: #ffbf00;
    font-family: "roboto-black";
    font-size: 100px;
}
.headerTitle2 { margin-top: -35px; }
.headerSubtitle {
    color: #fff;
    font-size: 23px;
    margin: 25px 0;
    max-width: 75%;
}
.headerBtnsBox {
    display: flex;
    margin: 0 -8px;
}
.headerBtn {
    color: #282828;
    text-align: center;
    padding: .8em 1em;
    border-radius: 7px;
    background: #ffbf00;
    box-shadow: 2px 2px #D79617;
    text-decoration: none;
    margin: 0 8px;
}
.headerBtn:hover {
    background: #129EC4;
    color: #fff;
    box-shadow: 2px 2px #0F87A7;
}
/* Right box */
.headerRightBox img { display: block; }
/* Features box */
.featuresWrapper {
    position: relative;
    padding: 30px 60px;
    background: #313131;
    color: #F2F2F2;
}
.featuresBox {
    display: flex;
    justify-content: space-between;
    max-width: 1600px;
    margin: 0 auto;
}
.middleFeature { margin: 0 150px; }
.featureTopBox {
    display: flex;
    align-items: center;
}
.featureTopIcon {
    margin-right: 10px;
    display: block;
    max-height: 27px;
    width: auto;
}
.featureTopTitle {
    font-family: "roboto-bold";
    font-size: 20px;
}
.featureBottomBox { margin-top: 5px; }
/* Bottom box */
.headerBottomBox {
    display: none;
    justify-content: center;
    padding-bottom: 30px;
}
.headerBottomBox img {
    display: block;
    max-width: 70%;
    flex-shrink: 0;
}
/* Content */
.topicWrapper { padding: 90px 60px; }
.topicBox {
    display: flex;
    text-align: center;
    max-width: 1600px;
    margin: 0 auto;
}
.topicBox img {
    max-width: 100%;
    height: auto;
    -webkit-filter: drop-shadow(7px 7px 31px rgba(0,0,0,0.26));
    filter: drop-shadow(7px 7px 31px rgba(0,0,0,0.26));
    flex-shrink: 0;
}
.topicContentBox {
    flex: 0 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-right: 60px;
    order: 1;
}
.topicImageBox {
    flex: 0 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 60px;
    order: 2;
}
.topicImageBox img {
    display: block;
    max-width: 100%;
    height: auto;
    align-self: center;
}
.middleTopic {
    background: #F7F7F7;
    position: relative;
}
.middleTopic:before {
    display: block;
    content: "";
    background: #F7F7F7;
    height: 50px;
    width: 100%;
    position: absolute;
    left: 0;
    top: -49px;
    clip-path: polygon(0 0, 100% 100%, 100% 100%, 0% 100%);
}
.middleTopic:after {
    display: block;
    content: "";
    background: #F7F7F7;
    height: 50px;
    width: 100%;
    position: absolute;
    left: 0;
    bottom: -49px;
    clip-path: polygon(0 0, 100% 0, 100% 0, 0% 100%);
}
.middleTopic .topicImageBox {
    padding-left: 0!important;
    padding-right: 60px!important;
    order: 1!important;
}
.middleTopic .topicContentBox {
    padding-left: 60px!important;
    padding-right: 0!important;
    order: 2!important;
}
.topicTitle {
    font-size: 50px;
    font-family: "roboto-black";
}
.topicSubtitle {
    font-size: 24px;
    color: #129EC4;
    margin: 0 auto;
    width: 80%;
}
.topicList {
    list-style: none;
    margin: 20px auto;
    width: 65%;
}
.topicList li {
    margin: 5px 0px;
    font-size: 18px;
}
.topicBtn {
    background: #129EC4;
    color: #fff;
    text-decoration: none;
    padding: .8em 1em;
    border-radius: 7px;
    display: table;
    margin: 0 auto;
    box-shadow: 2px 2px #0F87A7;
}
.topicBtn:hover {
    background: #ffbf00;
    color: #313131;
    box-shadow: 2px 2px #D79617;
}
/* Queries */
/*
@media screen and (max-width: 1920px) {
    .headerRightBox img {
        max-width: none;
        padding-left: 30px;
    }
    @supports (-ms-ime-align: auto) {
        .headerRightBox img {
            width:960px!important;
        }
    }    
}
*/
@media screen and (max-width: 1024px) {
    .topicBox { flex-direction: column; }
    .topicContentBox {
        padding: 0;
        margin-bottom: 50px;
    }
    .topicImageBox { padding: 0; }
    .middleTopic .topicBox {flex-direction: column-reverse; }
    .middleTopic .topicContentBox { padding: 0!important; }
    .middleTopic .topicImageBox { padding: 0!important; }
    .featuresBox { flex-direction: column; }
    .featuresWrapper { padding: 0; }
    .headerRightBox { display: none; }
    .headerBottomBox { display: flex; }
    .feature { padding: 20px 15px; }
    .middleFeature {
        margin: 0;
        border-top: 1px solid rgba(0,0,0,.3);
        border-bottom: 1px solid rgba(0,0,0,.3);
    }
    .featureTopBox { justify-content: center; }
    .featureBottomText { text-align: center; }
    .headerLeftBox {
        padding: 50px 15px;
        text-align: center;
        flex: 0 100%;
    }
    .headerBackground {
        padding: 30px 0;
    }
    .headerSubtitle { margin: 0 auto 30px auto; }
    .headerBtn { margin: 0 auto; }
}
@media screen and (max-width: 768px) {
    .topicWrapper {
        padding: 100px 15px;
    }
    .headerBottomBox img { max-width: 90%; }
}
@media screen and (max-width: 600px) {
    .headerTitle { font-size: 70px; }
    .headerTitle2 {
        font-size: 70px;
        margin-top: -15px;
    }
}