/* Admin-specific layout: app shell with persistent sidebar.
   Brand variables/buttons/cards come from brand.css. */

.admin-shell {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
    background: var(--bg);
}

.admin-sidebar {
    background: var(--surface-2);
    border-right: 1px solid var(--border);
    padding: 24px 0 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.admin-sidebar .sidebar-brand {
    padding: 0 20px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.admin-sidebar .sidebar-brand img {
    height: 36px;
    display: block;
}

.admin-sidebar .sidebar-section {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    font-weight: 600;
    padding: 12px 20px 4px;
}

.admin-sidebar a.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: background 0.1s ease, border-color 0.1s ease;
}

.admin-sidebar a.nav-link:hover {
    background: var(--surface);
    text-decoration: none;
    color: var(--text);
}

.admin-sidebar a.nav-link.active {
    background: var(--accent-light);
    color: var(--accent-hover);
    border-left-color: var(--accent);
}

.admin-sidebar a.nav-link .nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}

.admin-sidebar a.nav-link.active .nav-icon {
    opacity: 1;
}

.admin-sidebar .sidebar-footer {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-secondary);
}

.admin-sidebar .sidebar-footer .who {
    font-weight: 500;
    color: var(--text);
    margin-bottom: 2px;
}

.admin-sidebar .sidebar-footer .role-pill {
    display: inline-block;
    padding: 2px 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 6px;
}

.admin-sidebar .sidebar-footer .signout {
    margin-top: 10px;
    display: block;
}

.admin-main {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 14px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-topbar .page-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.admin-topbar .topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.admin-content {
    flex: 1;
    padding: 32px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

.admin-section {
    margin-bottom: 32px;
}

.admin-section-title {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    font-weight: 600;
    margin-bottom: 12px;
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.kpi-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.kpi-card .kpi-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    font-weight: 600;
    margin-bottom: 6px;
}

.kpi-card .kpi-value {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text);
}

.kpi-card .kpi-foot {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

@media (max-width: 900px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }
    .admin-sidebar {
        position: relative;
        height: auto;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0;
        padding: 8px;
    }
    .admin-sidebar .sidebar-brand { width: 100%; padding: 8px 12px; margin-bottom: 4px; }
    .admin-sidebar .sidebar-section { display: none; }
    .admin-sidebar a.nav-link { padding: 8px 12px; border-left: none; }
    .admin-sidebar .sidebar-footer { width: 100%; margin-top: 4px; }
    .admin-content { padding: 16px; }
}