body {
    background: #fafafa;
}

.site-header {
    height: 288px;
    background: url(/img/bg.png) no-repeat 50% 50%;
    background-position-y: 20%;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.img-chapter-reponsive {
    width: 60%;
}

@media (max-width: 1199px) {
    .image-cover-responsive {
        width: 30% !important;
    }
}

@media (max-width: 991px) {
    .site-header {
        height: 200px;
    }

    .long {
        width: 100%;
    }

    .long-dropdown {
        width: 100% !important;
    }

    .img-chapter-reponsive {
        width: 100%;
    }

    .image-cover-responsive-1 {
        width: 50% !important;
    }
    
    .image-cover-responsive-2 {
        display: none;
    } 

    .image-cover-responsive {
        width: 45% !important;
    }
}

@media (max-width: 767px) {
    .image-cover-responsive {
        width: 85% !important;
    }
}

@media (max-width: 480px) {
    .btn-responsive {
        font-size: 15px;
    }
}

.long {
    width: 500px;
}

.long-dropdown {
    width: 420px;
}

a {
    text-decoration: none !important;
}

.list-group-item {
    font-size: 18px !important;
}

#scrollTopButton {
    position: fixed;
    bottom: 45px;
    right: 10px;
    display: none;
    z-index: 100;
}