@media (min-width: 991px) and (max-width: 1200px) {
    .problem_btn{
        margin-right: 20px;
    }
    .lk_btn{
        width: 176px;
        font-size: 14px;
    }
    .problem_btn{
        font-size: 14px;
    }
    .searching_item_status{
        font-size: 12px;
    }
    .course_slider_item .searching_item_down div{
        margin-right: 12px;
    }
    .course_slider_item .searching_item_price{
        font-size: 11px;
    }
    .header_sub_wrap .lk_btn{
        width: 150px;
    }
}
@media (max-width: 990px) {
    .header_main_wrap_down h1{
        margin-top: 80px;
        margin-bottom: 25px;
        font-size: 30px;
        line-height: 44px;
    }
    .header_main_wrap_down h2{
        margin-bottom: 30px;
    }
    .header_main_search_form form{
        display: block;
    }
    .header_main_search_form form input{
        display: block;
        width: 100%;
        margin: 0 auto;
        margin-bottom: 10px;
    }
    .header_main_search_form form button{
        width: 80%;
    }
    .header_main_wrap{
        padding-bottom: 70px;
    }
    .footer_down h6{
        font-size: 10px;
    }
    .footer_down p{
        text-align: center;
    }
    .problem_btn{
        margin-top: 20px;
        margin-right: 0px;
        display: block;
        margin-bottom: 20px;
    }
    .search_header{
        margin-top: 30px;
    }
    .header_sub_wrap .problem_btn{
        display: inline-block;
    }
    .logo_header{
        display: block;
        margin: 0 auto;
        text-align: center;
    }
    .header_sub_wrap .header_main{
        padding: 10px 0;
    }
    .searching_right_filter{
        display: block;
    }
    .searching_item_date{
        font-size: 12px;
    }
    .searching_item_status{
        font-size: 12px;
    }
    .searching_item_price{
        font-size: 14px;
        line-height: 22px;
    }
    .searching_item{
        padding-right: 0;
    }
    .searching_item .col-md-8{
        padding: 0 30px;
    }
    .cource_section_head{
        display: block;
    }
    .cource_section_head .searching_item_price{
        display: inline-block;
        margin-top: 15px;
        margin-bottom: 10px;
    }
    .cource_add_review_bottom{
        display: block;
    }
    .cource_add_review_btn{
        margin-top: 15px;
    }
    .cource_reviews_head{
        display: block;
    }
    .cource_reviews .searching_right_filter .searching_right_filter_item{
        width: 100%;
        margin-bottom: 10px;
    }
    .cource_reviews_item{
        padding: 20px 15px;
    }
    .cource_reviews_item_class{
        right: 10px;
        top: 20px;
    }
    .cource_reviews_item_class_green{
        font-size: 12px;
    }
    .cource_reviews_item_class_grey{
        font-size: 12px;
    }
    .course_slider_item{
        margin-left: 25px;
        margin-right: 25px;
    }
    .modal .modal-content{
        padding: 30px 20px;
    }
}