:root {
        --primary: #163844;
        --primary_dark: #102a33;
        --secondary: #1f5668;
        --light: #f5f9fa;
        --white: #ffffff;
        --border: rgba(255, 255, 255, 0.08);
        --text: #d7e4e8;
    }

    /* =========================
           HEADER
        ========================= */

    .header {
        width: 100%;
        background: linear-gradient(135deg,
                var(--primary),
                var(--primary_dark));
        position: sticky;
        top: 0;
        z-index: 9999;
        box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
    }

    .nav_container {
        max-width: 1400px;
        margin: auto;
        padding: 0 20px;
        height: 78px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* =========================
           LOGO
        ========================= */

    .logo {
        display: flex;
        align-items: center;
        gap: 14px;
        text-decoration: none;
        color: #fff;
    }

    .logo img {
        width: 52px;
        height: 52px;
        border-radius: 50%;
        object-fit: cover;
    }

    .logo_text h2 {
        font-size: 20px;
        font-weight: 700;
        line-height: 1.1;
    }

    .logo_text span {
        font-size: 12px;
        color: rgba(255, 255, 255, 0.75);
    }

    /* =========================
           NAV MENU
        ========================= */

    .nav_menu {
        display: flex;
        /*  align-items: center; */
    }

    .nav_links {
        display: flex;
        align-items: center;
        list-style: none;
        gap: 6px;
    }

    .nav_links>li {
        position: relative;
    }

    .nav_links>li>a {
        display: flex;
        align-items: center;
        gap: 8px;
        text-decoration: none;
        color: #fff;
        padding: 14px 18px;
        border-radius: 12px;
        font-size: 15px;
        font-weight: 500;
        transition: 0.3s ease;
    }

    .nav_links>li>a:hover {
        background: rgba(255, 255, 255, 0.08);
    }

    .arrow {
        font-size: 11px;
        transition: 0.3s ease;
    }

    .has_dropdown:hover .arrow,
    .has_mega:hover .arrow {
        transform: rotate(180deg);
    }

    /* =========================
           DROPDOWN
        ========================= */

    .dropdown {
        position: absolute;
        top: 100%;
        left: 0;
        width: 280px;
        background: #fff;
        border-radius: 18px;
        padding: 18px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(12px);
        transition: 0.3s ease;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
    }

    .has_dropdown:hover .dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .dropdown a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        text-decoration: none;
        color: #163844;
        padding: 14px;
        border-radius: 12px;
        margin-bottom: 6px;
        transition: 0.3s ease;
        font-size: 14px;
        font-weight: 500;
    }

    .dropdown a:hover {
        background: #f3f7f8;
        padding-left: 18px;
    }

    /* =========================
           MEGA MENU
        ========================= */

    .mega_menu {
        position: absolute;

        top: calc(100% + 0px);
        left: 50%;



        width: 800px;


        background: #fff;
        border-radius: 5px;
        padding: 28px;

        display: grid;
        align-items: flex-start;
        grid-template-columns: 320px 1fr;
        gap: 24px;

        opacity: 0;
        visibility: hidden;



        box-shadow: 0 25px 60px rgba(0, 0, 0, 0.14);

        z-index: 9999;
        left: 50%;

        transform: translateX(-10%);
    }

    .has_mega {
        position: relative;
        display: flex;
        align-items: center;
    }

    .mega_menu_about {
        grid-template-columns: 2fr;
    }

    .mega_menu_rd {
        grid-template-columns: 1fr;
    }

    .has_mega {
        position: relative;
    }

    .has_mega:hover .mega_menu {
        opacity: 1;
        visibility: visible;
        transform: translateX(-10%);
    }

    .mega_menu_media {
        transform: translateX(-80%);
    }

    .has_mega:hover .mega_menu_media {
        transform: translateX(-80%);
    }

    /* =========================
           LEFT SECTION
        ========================= */

    .mega_highlight {
        background: var(--accent-1);
        border-radius: 5px;
        padding: 10px 10px;
        color: var(--background-color-1);
        max-width: 280px;
    }

    .mega_highlight img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-radius: 5px;
        margin-bottom: 10px;
    }

    .mega_highlight h3 {
        font-size: 22px;
        margin-bottom: 7px;
    }

    .mega_highlight p {
        font-size: 14px;
        line-height: 1.7;
        color: rgba(255, 255, 255, 0.88);
        margin-bottom: 10px;
    }

    .btn {

        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.12);
        padding: 12px 18px;
        border-radius: 12px;
        color: var(--background-color-1);
        text-decoration: none;
        transition: 0.3s ease;
    }

    .btn:hover {
        background: rgba(255, 255, 255, 0.22);
    }

    /* =========================
           RIGHT GRID
        ========================= */

    .mega_grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }

    .mega_grid_about {
        grid-template-columns: repeat(2, 1fr);
    }

    .mega_card {
        border: 1px solid #edf2f4;
        border-radius: 5px;
        padding: 10px;
        transition: 0.3s ease;
        background: var(--background-color-1);
    }



    .mega_card>a {
        text-decoration: none;
        color: #163844;
    }

    .mega_card i {
        font-size: 22px;
        margin-bottom: 12px;
        color: var(--primary);
    }

    .mega_card h4 {
        font-size: 16px;
        margin-bottom: 8px;
        font-weight: 500;
    }

    .mega_card p {
        font-size: 13px;
        color: #64748b;
        line-height: 1.6;
    }

    /* =========================
           RESEARCH MENU
        ========================= */

    .inner_links {
        margin-top: 18px;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .inner_links a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        text-decoration: none;
        color: #163844;
        font-size: 14px;
        font-weight: 500;
        padding: 12px 14px;
        border-radius: 12px;
        transition: 0.3s ease;
        background: var(--background-color-3);
    }

    .inner_links_media a {
        justify-content: unset;
    }

    .inner_links a:hover {
        background: #edf5f7;
        transform: translateX(4px);
    }

    .inner_links a i {
        color: var(--primary);
        font-size: 14px;
        margin: 0;
    }

    .no_top {
        margin-top: 0;
    }

    .no_top a {
        background: var(--background-color-1);
        border: 1px solid #edf2f4;
    }

    .no_top a:hover {
        background: #f5f9fa;
    }

    /* =========================
           MOBILE TOGGLE
        ========================= */

    .mobile_toggle {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.08);
        display: none;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        color: var(--text-color-white);
        font-size: 22px;
        position: relative;
        z-index: 10001;
    }

    /* =========================
           overlay_nav
        ========================= */

    .overlay_nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.45);

        opacity: 0;
        visibility: hidden;

        transition: 0.3s ease;

        z-index: 9998;
    }

    .overlay_nav.active {
        opacity: 1;
        visibility: visible;
    }

    .dir-card {
        padding: 16px;
        border-radius: 5px;
        border: 1px solid #eee;
        transition: 0.3s;
        border: 1px solid #DCE5EA;
    }

    .dir-card .dir-title {
        font-weight: 500;
        color: var(--text-color-1);
    }

    .dir-title a {
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-decoration: none;
        color: var(--primary);
        font-size: 0.95rem;
    }

    .dir-title span {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .directorate-mega .dir-title i {
        color: var(--primary);
    }

    .social_grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }

    .social_card {
        position: relative;

        display: flex;
        align-items: center;
        gap: 14px;

        padding: 18px 10px;
        border-radius: 10px;

        text-decoration: none;
        overflow: hidden;

        color: var(--background-color-3);

        transition: 0.3s ease;
    }

    .social_card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    }

    .social_card i {
        width: 46px;
        height: 46px;
        margin-bottom: 0px;
        display: flex;
        align-items: center;
        justify-content: center;

        border-radius: 50%;

        background: var(--background-color-1);
        font-size: 1.2rem;
    }

    .social_card span {
        font-size: 15px;
        font-weight: 500;
        letter-spacing: 0.2px;
    }

    /* FACEBOOK */

    .social_card:nth-child(1) {
        background: linear-gradient(135deg, #1877f2, #0f5fd7);
    }

    /* X / TWITTER */

    .social_card:nth-child(2) {
        background: linear-gradient(135deg, #1f2937, #000000);
    }

    /* YOUTUBE */

    .social_card:nth-child(3) {
        background: linear-gradient(135deg, #ff0000, #c40000);
    }

    /* INSTAGRAM */

    .social_card:nth-child(4) {
        background: linear-gradient(135deg,
                #f58529,
                #dd2a7b,
                #8134af,
                #515bd4);
    }

    @media(max-width:1100px) {

        .mega_menu {
            width: 760px;
        }

    }

    @media(max-width:992px) {
        .nav_container {
            justify-content: flex-end;
        }

        .mobile_toggle {
            display: flex;
        }

        .nav_menu {
            position: fixed;
            padding: 0px 20px;
            top: 0;
            left: 0;

            width: 90%;
            /*    max-width: 85%; */

            height: 100vh;
            background: var(--background-color-1);

            overflow-y: auto;

            transform: translateX(-100%);
            transition: transform 0.4s ease;

            z-index: 10000;

            box-shadow: 8px 0 30px rgba(0, 0, 0, 0.12);
        }

        .nav_menu.active {
            width: 80%;
            transform: translateX(0);
        }

        .nav_links {
            flex-direction: column;
            align-items: flex-start;
            gap: 0;
        }

        .nav_links>li {
            width: 100%;
            border-bottom: 1px solid #edf2f4;
        }

        .nav_links>li>a {
            color: #163844;
            width: 100%;
            justify-content: space-between;
            padding: 18px 0;
            border-radius: 0;
        }

        .dropdown,
        .mega_menu {
            position: static;
            width: 100%;
            opacity: 1;
            visibility: visible;
            transform: none;
            display: none;
            box-shadow: none;
            padding: 10px 0 10px 12px;
            border-radius: 0;
            background: transparent;

            max-height: 65vh;
            overflow-y: auto;
            background: #f7fafb;
            padding: 20px;
            animation: slideDown 0.3s ease;
            left: auto;
            right: auto;
            transform: none !important;
        }

        .has_dropdown.open .dropdown,
        .has_mega.open .mega_menu {
            display: block;
        }

        .mega_menu {
            grid-template-columns: 1fr;
        }

        .mega_grid {
            grid-template-columns: 1fr;
        }

        .mega_highlight {
            margin-bottom: 20px;
        }

        .nav_links {
            width: 100%;
        }

        .has_mega.open>a,
        .has_dropdown.open>a {
            font-weight: 600;
        }

        .has_mega.open,
        .has_dropdown.open {
            /*  background: #f7fafb; */
            /*    padding: 0px 20px; */
        }

        .has_mega {
            display: block;
        }

    }

    @media(max-width:600px) {
        .dir-title a {
            font-size: 0.75rem;
        }

        .nav_container {
            height: 72px;
            padding: 0 4px;
        }

        .logo_text h2 {
            font-size: 16px;
        }

        .logo_text span {
            display: none;
        }

        .nav_menu {
            width: 100%;
        }

        .inner_links a {
            font-size: 13px;
            padding: 12px;
        }

        .social_grid {
            grid-template-columns: repeat(1, 1fr);
        }

        .brand-logo img {
            width: 90px;
            height: 90px;
        }

        .brand-area {
            gap: 5px;
        }

        .header-section-content {
            padding: 0px 5px;
        }

        .mega_menu {
            padding: 10px 5px;
        }
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-8px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }