.site-header {
    background: #ffffff;
    padding: 10px 20px;
    border-bottom: 1px solid #ddd;
}

.site-header-img {
    max-height: 90px;
    display: block;
}

.main-menu {
    background: #1f2d3d;
}

.main-menu .nav-link {
    color: #f0f0f0;
}

.main-menu .nav-link.active,
.main-menu .nav-link:hover {
    color: #ffffff;
    text-decoration: underline;
}

.main-menu .navbar-text {
    color: #f0f0f0;
    font-weight: 500;
}

/* Level-3 flyout submenu: Bootstrap 5 has no built-in nested dropdown. */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu > .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -1px;
    display: none;
}

.dropdown-submenu:hover > .dropdown-menu {
    display: block;
}

.login-card {
    max-width: 420px;
    margin: 60px auto;
}

.file-grid td {
    vertical-align: middle;
}

.file-grid a.grid-action {
    cursor: pointer;
}

/* Sub-sections: indented (via .ms-4 on the wrapping div) with a left
   border and a slightly smaller/muted heading, so they read as nested
   under their parent section rather than as another top-level section. */
.subsection {
    border-left: 3px solid #dee2e6;
    padding-left: 1rem;
    margin-bottom: 1.5rem;
}

.subsection h3 {
    font-size: 1.1rem;
    color: #495057;
}