section.left{
    display :flex ;
    justify-content: left;
}
nav#v_menu1{
    border: 4px solid blue;

}
nav#v_menu1 > ul{
    list-style: none;

}

nav#v_menu1 > ul > li{
    border: 2px solid yellow;
    margin: 4px;
    position: relative;
    width: 180px;
}
nav#v_menu1 a{
    display:block; width: 100%; height: 100%;
    padding: 8px 16px;
    text-decoration: none;
    
}
nav#v_menu1 a:hover{
    background-color: #ffc;

}
nav#v_menu1 > ul > li:hover>ul.submenu{
    display: block;
}
nav#v_menu1 ul.submenu{
    position: absolute;
    top: 0px; left :100%;
    width: 180px;
    display: none;
    padding-top: 10px;
    list-style: none;
}
nav#v_menu1 ul.submenu li{
    background-color: darkgreen;
    list-style: none;
    margin: 5px 0px;

}