.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    width: min(var(--container-width), calc(100% - 48px));
    min-height: 96px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 36px;
}

.brand-container {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-shrink: 0;
}

.brand-logo {
    display: flex;
    align-items: center;
}

.brand-logo img {
    width: auto;
    max-width: 175px;
    height: 72px;
    object-fit: contain;
}

.brand-logo-secondary img {
    max-width: 125px;
    height: 55px;
}

.brand-divider {
    width: 1px;
    height: 44px;
    background: #d8d8d8;
}

.main-navbar {
    margin-left: auto;
}

.navbar-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 27px;
}

.navbar-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: 96px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    white-space: nowrap;
    transition: color var(--transition);
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--color-secondary);
}

.navbar-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 25px;
    height: 2px;
    background: var(--color-primary);
}

.navbar-link i {
    font-size: 10px;
}

.navbar-toggle {
    display: none;
    border: 0;
    background: transparent;
    color: var(--color-primary);
    font-size: 30px;
    cursor: pointer;
}

.navbar-toggle svg { width: 30px; height: 30px; display: block; }
.navbar-dropdown { position: relative; }
button.navbar-link {
    appearance: none;
    -webkit-appearance: none;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    font-family: inherit;
    line-height: inherit;
    text-align: left;
    cursor: pointer;
}
.navbar-chevron { width: 12px; height: 12px; transition: transform var(--transition); }
.navbar-dropdown-toggle[aria-expanded="true"] .navbar-chevron { transform: rotate(180deg); }

.navbar-submenu {
    position: absolute;
    top: calc(100% - 12px);
    left: -18px;
    min-width: 245px;
    margin: 0;
    padding: 8px;
    list-style: none;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-white);
    box-shadow: 0 12px 30px #00388618;
}

.navbar-submenu a {
    display: block;
    padding: 12px 14px;
    border-radius: 6px;
    color: var(--color-primary);
    font-size: 14px;
    white-space: nowrap;
}

.navbar-dropdown-students .navbar-submenu { left: auto; right: 0; }

.navbar-submenu a:hover,
.navbar-submenu a[aria-current="page"] { background: #edf3fb; }
.navbar-dropdown-toggle:focus-visible,
.navbar-submenu a:focus-visible,
.navbar-toggle:focus-visible { outline: 3px solid var(--color-secondary); outline-offset: 3px; }

@media (max-width: 900px) {
    button.navbar-dropdown-toggle { width: 100%; padding: 14px 0; justify-content: space-between; }
    .navbar-submenu { position: static; min-width: 0; margin: 0 0 8px; box-shadow: none; background: var(--color-surface); }
    .navbar-submenu a { white-space: normal; }
    .main-navbar { max-height: calc(100dvh - 78px); overflow-y: auto; }
}