header {
    background: #273348;
    box-shadow: 2px 5px 20px rgba(0, 0, 0, 0.1);
    height: 70px;
    margin-left: -15px;
    margin-right: -15px;
}

    header .item-header1 {
        margin-top: 15px;
        padding-left: 30px;
    }

    header .item-header2 {
        margin-top: 15px;
        text-align: right;
        padding-right: 30px;
        line-height:40px;
    }

        header .item-header2 #divSearch {
            width: 362px;
            height: 40px;
            border-radius: 50px !important;
            border: none;
            display: inline-block;
        }

        header .item-header2 #divThongBao {
            width: 32px;
            height: 40px;
            border: none;
            display: inline-block;
            color: white;
            position: relative;
            cursor: pointer;
        }

        header .item-header2 #divMenu {
            width: 200px;
            height: 40px;
            border: none;
            display: inline-block;
            color: white;
            position: relative;
            cursor: pointer;
        }

#divThongBao .dropdown-menu, #divMenu .dropdown-menu {
    min-width: 308px;
    transform: unset !important;
    top: 45px !important;
    left: unset !important;
    right: 0px !important;
    box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.15);
}
    #divMenu .dropdown-menu .dropdown-item img {
        padding: 0px !important;
        box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.15);
    }