:root {
    --bs-primary: #D32F2F;
    --bs-primary-hover: #B71C1C;
    --bs-body-bg: #F7F7F7;
    --bs-body-color: #212121;
    --bs-border-color: #E0E0E0;
    --text-secondary: #616161;
}

body {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    font-family: 'Inter', 'Segoe UI', Tahoma, sans-serif;
}

a,
.link-primary {
    color: var(--bs-primary);
}

a:hover,
.link-primary:hover {
    color: var(--bs-primary-hover);
}

.btn-primary {
    background-color: var(--bs-primary) !important;
    border-color: var(--bs-primary) !important;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--bs-primary-hover) !important;
    border-color: var(--bs-primary-hover) !important;
}

.btn-outline-primary {
    color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--bs-primary);
    color: #fff;
}

.card {
    background: #fff;
    border: 1px solid var(--bs-border-color);
    border-radius: 8px;
}

.sidebar {
    width: 260px;
    background: #fff;
    border-right: 1px solid var(--bs-border-color);
    min-height: 100vh;
}

.sidebar .nav-link {
    color: var(--bs-body-color);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    font-weight: 500;
}

.sidebar .nav-link:hover {
    background: #F7F7F7;
}

.sidebar .nav-link.active {
    color: #B71C1C;
    font-weight: 600;
    border-left: 3px solid var(--bs-primary);
    background: rgba(211, 47, 47, 0.08);
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--bs-border-color);
}

.app-content {
    background: var(--bs-body-bg);
}

.table {
    --bs-table-border-color: #E0E0E0;
    border: 1px solid var(--bs-border-color);
}

.table thead th {
    color: var(--text-secondary);
    font-weight: 600;
    background: #fafafa;
}

.table-bordered > :not(caption) > * {
    border-width: 1px 0;
}

.badge-primary,
.badge.bg-primary {
    background-color: var(--bs-primary);
}

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

.main-area {
    background: var(--bs-body-bg);
}

.app-footer {
    color: var(--text-secondary);
}

@media (max-width: 991.98px) {
    .sidebar {
        width: 100%;
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--bs-border-color);
    }
}