.sidenav {
    position: sticky;
    top: 80px; /* pod hlavnou navigáciou */
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    padding-right: 1rem;
    font-size: 0.875rem;
}

.sidenav-content a {
    display: block;
    padding: 0.25rem 0;
    color: #495057;
    text-decoration: none;
}

.sidenav-content a:hover,
.sidenav-content a.active {
    color: #007bff;
}

.sidenav-content .nav-h1 {
    font-weight: bold;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #dee2e6;
}

.sidenav-content .nav-h3 {
    padding-left: 1rem;
    font-size: 0.8rem;
}