.row {
        --bs-gutter-x: 0rem !important;
    }
    /* filter */
    
    @media (min-width: 991px) {
        .offline-course {
            width: 100%;
        }
        .offline-course h2 {
            font-size: 25px;
            color: #000;
            font-weight: 700;
        }
        .offline-course .select-div {
            position: relative;
            /* width: 31%; */
        }
        .btn-div-filter {
            width: 5%;
            display: flex;
            justify-content: end;
        }
        .btn-div-filter button {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: #f47721;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            border: none;
        }
        .btn-div-filter button:hover {
            background-color: #1c2e5b;
        }
        .offline-course .select-div input {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #fff;
            border-radius: 35px;
            box-shadow: 0px 8px 20px 0px #11318317;
            height: 40px;
            padding: 0px 10px;
            color: #1c2e5b;
            z-index: 3;
            position: relative;
            border: none;
            padding-left: 20px;
        }
        .offline-course .select-div .select-filter {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #fff;
            border-radius: 35px;
            box-shadow: 0px 8px 20px 0px #11318317;
            height: 40px;
            padding: 0px 10px;
            cursor: pointer;
            color: #1c2e5b;
            z-index: 3;
            position: relative;
        }
        .offline-course .select-div .list-filter {
            width: 100%;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0px 8px 20px 0px #11318317;
            height: 0px;
            padding: 15px;
            cursor: pointer;
            color: #1c2e5b;
            position: absolute;
            top: 0px;
            overflow-y: scroll;
            display: block;
            z-index: 2;
            transition: all 300ms;
            opacity: 0;
        }
        .offline-course .select-div .list-filter-active {
            top: calc(100% + 10px);
            height: 200px;
            transition: all 300ms;
            opacity: 1;
        }
        .offline-course .select-div .list-filter div {
            padding: 10px 0px;
            border-bottom: 1px solid rgb(228, 228, 228);
        }
        .offline-course .load-more {
            text-decoration: none;
            color: #f47721;
            margin-top: 40px;
            border: 1px solid #f47721;
            padding: 5px 15px;
            border-radius: 35px;
            cursor: pointer;
        }
        .tag-div a {
            text-decoration: none;
            color: #1c2e5b;
            margin-top: 20px;
            margin-right: 20px;
        }
        .tag-div .active {
            background-color: #1c2e5b;
            color: #fff;
            padding: 3px 10px;
            border-radius: 35px;
        }
    }
    
    @media (max-width: 991px) {
        .offline-course {
            width: 100%;
        }
        .offline-course h2 {
            font-size: 25px;
            color: #000;
            font-weight: 700;
        }
        .offline-course .select-div {
            position: relative;
            margin-top: 20px;
        }
        .btn-div-filter {
            width: 100%;
            display: flex;
            justify-content: end;
            margin-top: 20px;
        }
        .btn-div-filter button {
            width: 100%;
            height: 40px;
            border-radius: 8px;
            background-color: #f47721;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            border: none;
        }
        .offline-course .select-div input {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0px 8px 20px 0px #11318317;
            height: 40px;
            padding: 0px 10px;
            color: #1c2e5b;
            z-index: 3;
            position: relative;
            border: none;
            padding-left: 20px;
        }
        .offline-course .select-div .select-filter {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0px 8px 20px 0px #11318317;
            height: 40px;
            padding: 0px 10px;
            cursor: pointer;
            color: #1c2e5b;
            z-index: 3;
            position: relative;
        }
        .offline-course .select-div .list-filter {
            width: 100%;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0px 8px 20px 0px #11318317;
            height: 0px;
            padding: 15px;
            cursor: pointer;
            color: #1c2e5b;
            position: absolute;
            top: 0px;
            overflow-y: scroll;
            display: block;
            transition: all 300ms;
            opacity: 0;
        }
        .offline-course .select-div .list-filter-active {
            top: calc(100% + 10px);
            height: 200px;
            transition: all 300ms;
            opacity: 1;
            z-index: 4;
        }
        .offline-course .select-div .list-filter div {
            padding: 10px 0px;
            border-bottom: 1px solid rgb(228, 228, 228);
        }
        .offline-course .load-more {
            text-decoration: none;
            color: #f47721;
            margin-top: 40px;
            border: 1px solid #f47721;
            padding: 5px 15px;
            border-radius: 35px;
            cursor: pointer;
        }
        .tag-div a {
            text-decoration: none;
            color: #1c2e5b;
            margin-top: 20px;
            margin-right: 20px;
        }
        .tag-div .active {
            background-color: #1c2e5b;
            color: #fff;
            padding: 3px 10px;
            border-radius: 35px;
        }
    }
    /* course-item */
    
    @media (min-width: 991px) {
        .course-div .item-course {
            width: 365px;
            border-radius: 8px;
            margin-top: 24px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: rgba(50, 50, 50, 0.1) 0px 4px 12px;
            cursor: pointer;
        }
        .course-div .item-course-join {
            width: 365px;
            border-radius: 8px;
            margin-top: 24px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: rgba(50, 50, 50, 0.1) 0px 4px 12px;
            cursor: auto;
        }
        .course-div .item-course:hover {
            box-shadow: #1c2e5b6c 0px 4px 12px;
        }
        .course-div .item-course .img {
            width: 100%;
        }
        .course-div .item-course .img img {
            width: 100%;
            height: 200px;
            border-top-left-radius: 8px;
            border-top-right-radius: 8px;
            object-fit: cover;
        }
        /* start-detail-join */
        .course-div .item-course .detail-join {
            padding: 15px;
        }
        .course-div .item-course .detail-join h6 {
            font-size: 18px;
            color: #000;
            font-weight: 900;
        }
        .course-div .item-course .detail-join .item-det {
            width: auto;
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        .course-div .item-course .detail-join .item-det i {
            font-size: 16px;
            color: #1c2e5b;
        }
        .course-div .item-course .detail-join .item-det span {
            font-size: 16px;
            color: rgb(24, 24, 24);
            margin-left: 5px;
        }
        .course-div .item-course .detail-join .reserve-btn {
            width: 100%;
            height: 40px;
            background-color: #1c2e5b;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 10px;
            border-radius: 8px;
            color: #fff;
            text-decoration: none;
        }
        .course-div .item-course .detail-join .join-btn {
            width: 100%;
            height: 40px;
            background-color: transparent;
            border: 2px solid #1c2e5b;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 10px;
            border-radius: 8px;
            color: #1c2e5b;
            text-decoration: none;
        }
        /* end-detail-join */
        .course-div .item-course .detail {
            padding: 15px;
        }
        .course-div .item-course .detail h6 {
            font-size: 16px;
            color: #000;
            font-weight: 900;
        }
        .course-div .item-course .detail .item-det {
            width: auto;
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        .course-div .item-course .detail .item-det i {
            font-size: 14px;
            color: rgb(180, 180, 180);
        }
        .course-div .item-course .detail .item-det span {
            font-size: 14px;
            color: rgb(180, 180, 180);
            margin-left: 5px;
        }
        .hr {
            width: 100%;
            background: linear-gradient(to right, #57575700, #c0c0c0d9, #57575700);
            height: 1px;
        }
        .course-div .item-course .price {
            display: flex;
            align-items: center;
            justify-content: end;
            padding: 0px 15px;
            padding-top: 10px;
        }
        .course-div .item-course .price h6 {
            color: #f47721;
            font-weight: 900;
            font-size: 18px;
        }
        .course-div .item-course:hover .price h6 {
            color: #1c2e5b;
        }
        .course-div .item-course .price h6 small {
            font-size: 14px;
            margin: 0px;
            margin-right: 2px;
        }
    }
    
    @media (max-width: 991px) {
        .course-div .item-course {
            width: 100%;
            border-radius: 8px;
            margin-top: 24px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: rgba(50, 50, 50, 0.1) 0px 4px 12px;
        }
        .course-div .item-course-join {
            width: 365px;
            border-radius: 8px;
            margin-top: 24px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: rgba(50, 50, 50, 0.1) 0px 4px 12px;
            cursor: auto;
        }
        .course-div .item-course .img {
            width: 100%;
        }
        .course-div .item-course .img img {
            width: 100%;
            height: 200px;
            border-top-left-radius: 8px;
            border-top-right-radius: 8px;
            object-fit: cover;
        }
        /* start-detail-join */
        .course-div .item-course .detail-join {
            padding: 15px;
        }
        .course-div .item-course .detail-join h6 {
            font-size: 18px;
            color: #000;
            font-weight: 900;
        }
        .course-div .item-course .detail-join .item-det {
            width: auto;
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        .course-div .item-course .detail-join .item-det i {
            font-size: 16px;
            color: #1c2e5b;
        }
        .course-div .item-course .detail-join .item-det span {
            font-size: 16px;
            color: rgb(24, 24, 24);
            margin-left: 5px;
        }
        .course-div .item-course .detail-join .reserve-btn {
            width: 100%;
            height: 40px;
            background-color: #1c2e5b;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 10px;
            border-radius: 8px;
            color: #fff;
            text-decoration: none;
        }
        .course-div .item-course .detail-join .join-btn {
            width: 100%;
            height: 40px;
            background-color: transparent;
            border: 2px solid #1c2e5b;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 10px;
            border-radius: 8px;
            color: #1c2e5b;
            text-decoration: none;
        }
        /* end-detail-join */
        .course-div .item-course .detail {
            padding: 15px;
        }
        .course-div .item-course .detail h6 {
            font-size: 16px;
            color: #000;
            font-weight: 900;
        }
        .course-div .item-course .detail .item-det {
            width: auto;
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        .course-div .item-course .detail .item-det i {
            font-size: 14px;
            color: rgb(180, 180, 180);
        }
        .course-div .item-course .detail .item-det span {
            font-size: 14px;
            color: rgb(180, 180, 180);
            margin-left: 5px;
        }
        .hr {
            width: 100%;
            background: linear-gradient(to right, #57575700, #c0c0c0d9, #57575700);
            height: 1px;
        }
        .course-div .item-course .price {
            display: flex;
            align-items: center;
            justify-content: end;
            padding: 0px 15px;
            padding-top: 10px;
        }
        .course-div .item-course .price h6 {
            color: #f47721;
            font-weight: 900;
            font-size: 18px;
        }
        .course-div .item-course .price h6 small {
            font-size: 14px;
            margin: 0px;
            margin-right: 2px;
        }
    }
    /* class-item */
    
    @media (min-width: 991px) {
        .class-div .item-class {
            width: 365px;
            margin-top: 34px;
        }
        .class-div .item-class .img {
            width: 100%;
            display: flex;
            justify-content: center;
        }
        .class-div .item-class .img img {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            object-fit: cover;
        }
        .class-div .item-class .detail {
            width: 100%;
            /* height: 400px; */
            background-color: #fff;
            border-radius: 10px;
            box-shadow: rgba(50, 50, 50, 0.1) 0px 4px 12px;
            padding: 10px;
            padding-top: 40px;
            margin-top: -20px;
        }
        .class-div .item-class .detail h6 {
            font-size: 18px;
            font-weight: 700;
            color: #000;
            text-align: center;
        }
        .class-div .item-class .detail p {
            font-size: 14px;
            text-align: justify;
        }
        .hr {
            width: 100%;
            background: linear-gradient(to right, #57575700, #9e9e9ed9, #57575700);
            height: 1px;
        }
        .class-div .item-class .detail .price-div {
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .class-div .item-class .detail .price-div h6 {
            color: #f47721;
            font-weight: 900;
            font-size: 18px;
        }
        .class-div .item-class:hover .detail .price-div h6 {
            color: #1c2e5b;
        }
        .class-div .item-class .detail .price-div h6 small {
            font-size: 14px;
            margin: 0px;
            margin-right: 2px;
        }
        .class-div .item-class .detail .price-div a {
            font-size: 14px;
            padding: 5px 10px;
            background-color: #f47721;
            text-decoration: none;
            color: #fff;
            border-bottom-left-radius: 8px;
            border-top-right-radius: 8px;
            margin-top: -8px;
        }
        .class-div .item-class:hover .detail .price-div a {
            background-color: #1c2e5b;
        }
    }
    
    @media (max-width: 991px) {
        .class-div .item-class {
            width: 350px;
            margin-top: 34px;
        }
        .class-div .item-class .img {
            width: 100%;
            display: flex;
            justify-content: center;
        }
        .class-div .item-class .img img {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            object-fit: cover;
        }
        .class-div .item-class .detail {
            width: 100%;
            /* height: 400px; */
            background-color: #fff;
            border-radius: 10px;
            box-shadow: rgba(50, 50, 50, 0.1) 0px 4px 12px;
            padding: 10px;
            padding-top: 40px;
            margin-top: -20px;
        }
        .class-div .item-class .detail h6 {
            font-size: 18px;
            font-weight: 700;
            color: #000;
            text-align: center;
        }
        .class-div .item-class .detail p {
            font-size: 14px;
            text-align: justify;
        }
        .hr {
            width: 100%;
            background: linear-gradient(to right, #57575700, #9e9e9ed9, #57575700);
            height: 1px;
        }
        .class-div .item-class .detail .price-div {
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .class-div .item-class .detail .price-div h6 {
            color: #f47721;
            font-weight: 900;
            font-size: 18px;
        }
        .class-div .item-class .detail .price-div h6 small {
            font-size: 14px;
            margin: 0px;
            margin-right: 2px;
        }
        .class-div .item-class .detail .price-div a {
            font-size: 14px;
            padding: 5px 10px;
            background-color: #f47721;
            text-decoration: none;
            color: #fff;
            border-bottom-left-radius: 8px;
            border-top-right-radius: 8px;
            margin-top: -8px;
        }
    }