div.document_list_area{
    padding: 15px 5px;
    /* background-color: #F9F9F9; */
}
ul.document_list{
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
ul.document_list li{
    width: calc(100% / 5 - 16px);
    padding: 30px 20px;
    border-radius: 16px;
    background-color: #1d1d1d;
    margin-bottom: 10px;
    color: #fff;
    transition: .3s;
    position: relative;
}
ul.document_list li:hover{
    transform: translateY(-10px);
    background-color: #fff;
}
ul.document_list li:hover .document_title, 
ul.document_list li:hover .document_summary{
    color:#000;
}
ul.document_list li:hover div.document_result{
    background-color: #000!important;
    color:#fff!important;
}
a.document_link{
    display: block;
    text-decoration: none;
    color: #fff;
}
a.document_link:hover, a.document_link:active, a.document_link:focus{
    text-decoration: none;
}
div.document_category{
    display: inline-block;
    width: 85px;
    padding: 10px;
    font-size: 13px;
    border-radius: 30px;
    margin-bottom: 1rem;
    font-weight: 700;
    text-align: center;
}
div.document_title{
    font-size: 20px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    transition: .3s;
}
div.document_summary{
    font-size: 13px;
    font-weight: 300;
    line-height: 1.6;
    margin-bottom: 1rem;
    transition: .3s;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}
div.document_result{
    font-size: 13px;
    font-weight: 700;
    padding: 8px 15px 10px;
    background-color: #2a2a2a;
    transition: .3s;
    margin-top: 10px;
}
ul.document_list li:hover div.document_result{
    background-color: #3e4c59;
    color: #fff;
}
.board .iCheck{
    position: absolute;
    top: 5px;
    left: 5px;
    z-index: 1;
}
@media ( max-width: 1400px ) {
    ul.document_list li{
        width: calc(100% / 4 - 20px);
    }
}
@media ( max-width: 1200px ) {
    ul.document_list li{
        width: calc(100% / 3 - 15px);
    }
}
@media ( max-width: 900px ) {
    ul.document_list li{
        width: calc(100% / 2 - 10px);
    }
}
@media ( max-width: 768px ) {
    .board_list{
        overflow: auto;
    }
    .board_list td.title{
        white-space: nowrap;
        min-width: auto;
    }
}
@media ( max-width: 650px ) {
    ul.document_list li{
        width: 100%;
    }
}