nav {
    margin: -30.5px 0 1px 0;
    text-align: left;
    font-size: 10pt;
    font-family: Helvetica, sans-serif;
}

nav ul ul {
    display: none;
}

nav ul li:hover>ul {
    display: block;
}

nav ul {
    list-style: none;
    position: relative;
    display: inline-table;
    margin: 0;
    min-height: 25px;
    white-space: nowrap;
}

nav ul:after {
    content: "";
    clear: both;
    display: block;
}

nav ul li {
    float: left;
}

nav ul li:hover,
nav ul li.active {
    background: #830400;
}

nav ul li:hover a {
    color: #fff;
}

nav ul li a {
    display: block;
    padding: 5px 20px;
    color: #fff;
    text-decoration: none;
    text-align: left;
}

nav ul ul {
    background: #5f6975;
    border-radius: 0px;
    padding: 0;
    position: absolute;
    top: 100%;
    width: 200px;
}

nav ul ul li {
    float: none;
    border-top: 1px solid #6b727c;
    border-bottom: 1px solid #575f6a;
    position: relative;
}

nav ul ul li a {
    padding: 5px 20px;
    color: #fff;
}

nav ul ul li a:hover {
    background: #4b545f;
}

nav ul ul ul {
    position: absolute;
    left: 100%;
    top: 0;
}
.ten_truong_link {
    text-align: center;
    margin-top: 7px;
    margin-bottom: 13px;
    text-decoration: none;
}
.ten_truong_dhqg {
    text-align: center;
    font-weight: bold;
    color: #AB2523;
    font-size: 16px;
    width: 100%;
    display: block;
    margin-bottom: 4.5px;
}
.ten_truong_dhqg_en {
    text-align: center;
    font-weight: bold;
    color: #AB2523;
    font-size: 14px;
    width: 100%;
    display: block;
}

.htitle {
    color: #3F3F55;
}

.narrow {
    width: 10px;
    height: 8px;
    background: url(images/arrowdown.png) no-repeat center center;
    display: inline-block;
    margin-left: 5px;
}

.menu {
    display: flex;
    flex-direction: column;
    background-color: #AB2523; /* bg-[#AB2523] */
}

.menu-container {
    display: flex;
    flex-direction: row;
    /*width: 1000px;            !* w-[1000px] *!*/
    margin: 0 auto;           /* m-auto */
    align-items: center;      /* items-center */
}

.menu-content {
    width: 100%;
    display: flex;
    flex-direction: row;      /* flex-row */
    align-items: center;
    font-size: 0.875rem;      /* text-sm */
    color: #ffffff;           /* text-white */
    padding-left: 40px;     /* ps-10 (40px) */
    justify-content: space-between;
}

.menu-left {
    display: flex;
    align-items: center;
}

.menu-right {
    display: flex;
    align-items: center;
    margin-left: auto;
}

.menu-link {
    padding: 7.5px 22px;        /* py-1 px-5 */
    font-size: 10pt;          /* text-[10pt] */
    white-space: nowrap;      /* whitespace-nowrap */
    color: #ffffff;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.menu-link:hover {
    background-color: #830400; /* hover:bg-[#830400] */
}

.menu-link-active {
    background-color: #830400;
}

.menu-lang {
    color: #000000;           /* text-black */
    border: 1px solid #ccc;   /* border */
    padding: 3px 5px;
    margin: 2px 2px 2px auto;
    font-size: 10pt;
}
.btn-logout {
    display: inline-flex;     /* inline-flex */
    align-items: center;      /* items-center */
    justify-content: center;

    margin-left: 8px;         /* ml-2 */
    margin-top: 1px;          /* my-[2px] */
    margin-bottom: 1px;

    height: 26px;             /* khớp menu */
    padding: 0 12px;          /* px-3 py-0 */

    font-size: 10pt;          /* text-[10pt] */
    font-weight: 600;         /* font-semibold */

    color: #AB2523;           /* text-[#AB2523] */
    background-color: #ffffff;
    border: 1px solid #ffffff;

    border-radius: 4px;       /* rounded */
    white-space: nowrap;

    text-decoration: none;
    cursor: pointer;

    transition: background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.btn-logout:hover {
    background-color: #830400;
    color: #ffffff;
    border-color: #830400;
}