:root {
    --sidebar-width: 240px;
    --sidebar-bg: #212529;
}

body {
    background-color: #f4f6f8;
}

.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
}

.sidebar .nav-link {
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.stat-card {
    border: none;
    border-radius: 1rem;
    box-shadow: 0 6px 18px rgba(33, 37, 41, 0.08);
}

.stat-card h3 {
    font-size: 1.75rem;
}

.table > :not(caption) > * > * {
    vertical-align: middle;
}

@media (max-width: 992px) {
    .sidebar {
        display: none;
    }

    body .d-flex.min-vh-100 {
        flex-direction: column;
    }
}