.menu-chinh, .menu-con {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: blue;
    font-family: Arial, sans-serif;
}

/* --- MENU CHINH */
.menu-chinh {
    display: flex; 
    width: fit-content;
}

.menu-chinh > li {
    border-right: 1px solid white; /* Phân cách trắng */
    position: relative; 
}

.menu-chinh > li > a {
    display: block;
    padding: 15px 30px;
    color: white;
    text-decoration: none;
    font-weight: bold;
    text-align: center;
}

/* --- MENU CON */
.menu-con {
    position: absolute; 
    top: 100%;         
    left: 0;
    width: 250px;
    border-top: 1px solid white;
    z-index: 999;
}

.menu-con li {
    border-bottom: 1px solid white;
}

.menu-con li a {
    display: block;
    padding: 12px 20px;
    color: white;
    text-decoration: none;
    font-size: 14px;
}

/* HIỆU ỨNG HOVER & ACTIVE */

/* Khi di chuột vào */
.menu-chinh li a:hover, .menu-con li a:hover {
    background-color: oldlace; 
    color: blue;
}


.active {
    background-color: oldlace !important;
    color: blue !important;
}