.app-shell-header{background:#fff;border-bottom:1px solid #dee2e6;margin-bottom:20px}.app-brand{color:#212529;font-size:1.1rem;font-weight:700;text-decoration:none}.app-nav-link{color:#495057;font-weight:500;text-decoration:none}.app-nav-link:hover{color:#0d6efd}