:root {
    --bg: #f3f5f7;
    --panel: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #dbe2ea;
    --accent: #0d6efd;
}

body {
    background: var(--bg);
    color: var(--text);
    font-feature-settings: "tnum" 1;
}

.admin-shell {
    max-width: 1480px;
    margin: 0 auto;
    padding: 24px 16px;
    display: grid;
    grid-template-columns: 248px 1fr;
    gap: 16px;
}

.admin-nav {
    position: sticky;
    top: 16px;
    align-self: start;
}

.admin-nav .card {
    border-radius: 12px;
}

.admin-nav .list-group-item {
    border: 0;
    border-radius: 8px;
    margin-bottom: 4px;
    color: #1e293b;
}

.admin-nav .list-group-item.active {
    background: var(--accent);
    color: #fff;
}

.admin-content {
    min-width: 0;
}

.card {
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}

.table thead th {
    font-weight: 600;
    color: #334155;
}

.table tbody td {
    vertical-align: middle;
}

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.btn {
    border-radius: 8px;
}

.form-control, .form-select {
    border-radius: 8px;
}

.page-title {
    letter-spacing: 0;
    font-weight: 650;
}

.form-text {
    color: var(--muted);
}

@media (max-width: 992px) {
    .admin-shell { grid-template-columns: 1fr; }
    .admin-nav { position: static; }
}