app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: #111827;
    color: #f9fafb;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.app-body {
    flex: 1;
}

.nav-menu .nav-link {
    color: rgba(249, 250, 251, 0.75);
}

.nav-menu .nav-link.active,
.nav-menu .nav-link:hover,
.nav-menu .nav-link:focus {
    color: #ffffff;
    background: rgba(37, 99, 235, 0.2);
}

@media (max-width: 992px) {
    .app-shell {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }
}