/* Main header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    background: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

/* Header layout */
.site-header-inner {
    max-width: 1500px;
    margin: 0 auto;
    /* padding: 12px 30px; */
    padding: 2px 5px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

/* University and group branding */
.site-branding {
    display: flex;
    align-items: center;
    gap: 22px;
    flex-shrink: 0;
}

.university-brand img {
    /* height: 48px; */
    height: 70px;
    width: auto;
    display: block;
}

.group-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #263747;
    font-size: 19px;
    font-weight: 600;
    white-space: nowrap;
}

.group-brand img {
    height: 48px;
    width: auto;
}

/* Main navigation */
.main-nav > ul {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 22px;

    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav li {
    position: relative;
}

.main-nav a {
    display: block;
    padding: 12px 0;

    color: #263747;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;

    transition: color 0.2s ease;
}

/* Hover and active links */
.main-nav a:hover,
.main-nav a[aria-current="page"] {
    color: #2876a5;
}

/* Team and Teaching parent links */
.nav-parent {
    display: flex;
    align-items: center;
    gap: 5px;
}

.dropdown-toggle {
    border: none;
    background: transparent;
    color: #263747;
    cursor: pointer;
    font-size: 14px;
    padding: 8px 4px;
}

/* Dropdown menu */
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;

    min-width: 230px;
    padding: 8px 0;
    margin: 0;

    list-style: none;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.10);
}

/* Show dropdown on hover, keyboard focus or click */
.nav-dropdown:hover > .dropdown-menu,
.nav-dropdown:focus-within > .dropdown-menu,
.nav-dropdown.open > .dropdown-menu {
    display: block;
}

.dropdown-menu a {
    padding: 10px 18px;
    font-size: 14px;
}

/* Responsive layout */
@media (max-width: 1100px) {

    .site-header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .main-nav {
        width: 100%;
    }

    .main-nav > ul {
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 5px 22px;
    }

    .dropdown-menu {
        position: static;
        min-width: 0;
        box-shadow: none;
        border: none;
        padding-left: 12px;
    }

    .nav-dropdown.open > .dropdown-menu {
        display: block;
    }
}

/* Smaller screens */
@media (max-width: 600px) {

    .site-header-inner {
        padding: 12px 16px;
    }

    .university-brand img {
        height: 38px;
    }

    .group-brand {
        font-size: 16px;
    }

    .group-brand img {
        height: 38px;
    }

    .main-nav > ul {
        gap: 2px 16px;
    }

    .main-nav a {
        font-size: 14px;
    }
}