.sidebar-one {
    float: left;
    width: 28%;
    margin-right: 2%;
}
.one-sidebar, main#main.one-sidebar {
    width: 70%;
    float: left;
}
.orderby-box select {
    background-color: #F4F4F4;
    border: none;
    border-radius: 20px;
    font-size: 15px;
}
/**/
.control-sidebar {
    width: 40px;
    position: absolute;
    height: 40px;
    text-align: center;
    top: 55%;
    cursor: pointer;
    display: none;
    color: #fff;
    background: #E05523;
    padding: 5px 10px;
    z-index: 99999;
    font-size: 18px;
    -webkit-transition: all 0.35s ease;
    -o-transition: all 0.35s ease;
    transition: all 0.35s ease;
}

.sidebar-one .control-sidebar {
    left: -40px;
    right: auto;
}

.sidebar-two .control-sidebar {
    right: 239px;
    left: auto;
    border-right: none;
}
.sidebar-one .control-sidebar.active i:before{
    content: '\f00d';
}

.sidebar-fa.fa {
    font-size: 18px;
    color: #fff;
}
/**/
.filter-box {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #bbbbbb8a;
}
.filter-box .form-check {
    margin-bottom: 5px;
}
.filter-box .title{
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 24px;
    margin-bottom: 10px;
    padding-bottom: 10px;
}
.khoahoc-head{
    min-height: 390px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
}
.toggle-arrow {
    transition: transform 0.3s;
    cursor: pointer;
    font-size: 18px;
}

.toggle-arrow.rotate {
    transform: rotate(-180deg);
}
/**/
.filter-box .form-check .form-check-input{
    border-radius: 0;
    border-color: #000;
}
.sidebar-content{
    position: sticky;
    top: 0;
}

@media only screen and (max-width: 1200px) {
    .block-dk {
        padding: 15px 10px;
    }
    .block-dk .title {
        margin-bottom: 15px;
    }
    .btn-sbdk {
        height: 32px;
        line-height: 32px;
        font-size: 14px;
    }
    .block-dk ul li {
        font-size: 10px;
    }
    /**/
    .heading_box{
        font-size: 15px;
    }
    .sb_filter_title {
        padding: 10px 0 10px 10px;
    }
    .block-sb-filter ul {
        padding: 20px 0 16px 15px;
    }
    .block-lh {
        padding: 20px;
    }
}
@media only screen and (max-width: 990px) {
    .one-sidebar,
    main#main.one-sidebar{
        width: 100% !important;
    }
    .sidebar-one {
        margin-left: 0;
    }
    .sidebar-one .item_post_content {
        padding-left: 10px;
    }
    .heading_box span {
        padding: 7px 25px 7px 10px;
    }
    .heading_box{
        padding-bottom: 5px;
    }
    .item-post-content h3 {
        font-size: 14px;
    }
    .postnb-date {
        font-size: 12px;
    }
/*    */
    .khoahoc-head {
        min-height: 200px;
    }
}
@media only screen and (max-width: 990px) {
    .sidebar-one{
        width: 100%;
        margin-right: 0;
    }

    .sidebar-one {
        position: fixed;
        background: #fff;
        top: 0;
        height: 100%;
        z-index: 99;
        top:0;
        right: -300px;
        width: 300px !important;
        border-left: solid 1px #bbbbbb;
    }

    .control-sidebar {
        display: flex;
        align-items: center;
    }

    .sidebar-one .sidebar-content {
        height: 100%;
        overflow-y: scroll;
        width: 100%;
        padding: 10px;
    }
    .sidebar-content {
        padding: 10px;
    }
    .title-sbmxh span{
        font-size: 15px;
    }
    .menu-category a {
        padding: 10px 15px;
        font-size: 15px;
    }
    .block-sidebar-mxh ul li a {
        margin-bottom: 15px;
    }
}