<div class="wrap">
        <div class="cont_select">
            <div class="select_each">
                <div class="scroll">
                    <table>
                        <caption class="hidden">table</caption>
                        <colgroup>
                            <col style="width: 85px;"/>
                            <col/>
                        </colgroup>
                        <thead>
                            <tr>
                                <th></th>
                                <th>Product Category</th>
                            </tr> 
                        </thead>
                        <tbody>
                            <tr>
                                <td></td>
                                <td><span>Product Category 1</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product Category 2</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product Category 3</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product Category 4</span></td>
                            </tr> 
                        </tbody>
                    </table>
                </div>
            </div>

            <div class="select_all">
                <div class="scroll">
                    <table>
                        <caption class="hidden">table2</caption>
                        <colgroup>
                            <col style="width: 85px;"/>
                            <col/>
                        </colgroup>
                        <thead>
                            <tr>
                                <th class="btn"><button type="button">Select All</button></th>
                                <th>Product</th>
                            </tr> 
                        </thead>
                        <tbody>
                            <tr>
                                <td></td>
                                <td><span>Product1</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product2</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product3</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product4</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product5</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product6</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product7</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product8</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product9</span></td>
                            </tr> 
                            <tr>
                                <td></td>
                                <td><span>Product10</span></td>
                            </tr> 
                            
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    </div>

        .wrap{
            max-width: 1000px;
            margin: 50px auto;
            padding: 20px;
            font-size: 14px;
        }

        /* content select */
        .cont_select{
            position: relative;
            display: flex;
            gap: 40px;
        }
        .cont_select [class*="select_"]{
            width: calc((100% - 40px) / 2);
        }
        .cont_select .scroll{
            max-height: 316px;
            border: 1px solid #C9C9C9;
            overflow-y: auto;
            overflow-x: hidden;
        }
        .cont_select table{
            position: relative;
            width: 100%;
            border-spacing: 0;
        }
        .cont_select thead{
            position: sticky;
            top: 0;
            border-bottom: 1px solid #CDCDCD;
            z-index: 5;
        }
        .cont_select th{
            height: 32px;
            padding: 10px 12px;
            border-bottom: 1px solid #cdcdcd;
            background-color: #f3f3f3;
            font-weight: 700;
        }
        .cont_select th.btn{
            padding: 10px 5px;
        }
        .cont_select th button{
            position: relative;
            border: none;
            color: #000;
            font-weight: 700;
            cursor: pointer;
        }

        .cont_select th button::after{
            content: "";
            position: absolute;
            left: 50%;
            top: 90%;
            transform: translate(-50%, -50%);
            width: 85%;
            height: 1px;
            background-color: #000;
        }
        .cont_select tr+tr td{
            border-top: 1px solid #CDCDCD;
        }
        .cont_select th.btn+th,
        .cont_select td+td{
            border-left: 1px solid #CDCDCD;
        }
        .cont_select .slds-form-element{
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 32px;
        }
        .cont_select td>span{
            display: block;
            padding: 6px;
        }
        .cont_select::after{
            content: "";
            width: 28px;
            height: 28px;
            position: absolute;
            top: 10px;
            left: 50%;
            transform: translateX(-50%);
            background-image: url("data:image/svg+xml,%3Csvg width='28' height='28' viewBox='0 0 28 28' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5 5L14 14L5 23' stroke='%23C9C9C9'/%3E%3Cpath d='M14.5 5L23.5 14L14.5 23' stroke='%23C9C9C9'/%3E%3C/svg%3E");
            background-repeat: no-repeat no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .hidden {
          position: absolute;
          overflow: hidden;
          padding: 0 !important;
          margin: 0 !important;
          width: 1px;
          height: 1px;
          line-height: 1px;
          font-size: 1px;
          border: 0;
          clip: rect(0 0 0 0);
        }

        @media (max-width: 673px){
            .cont_select{
                flex-direction: column;
            }
            .cont_select [class*="select_"]{
                width: 100%;
            }
            .cont_select .scroll {
                max-height: 184px;
            }
            .cont_select:after{
                top: 50%;
                left: 50%;
                transform: translate(-50%,-50%) rotate(90deg);
            }
        }