* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, 'Inter', sans-serif;
    background: var(--color-bg, #f9fafb);
    color: var(--color-text, #1f2937);
}

/* --- Single layout system: flexbox, sidebar + main side by side --- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.app-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-content {
    flex: 1;
    padding: 1.5rem;
}

.admin-footer {
    padding: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: #64748b;
}

.alert { padding: 0.75rem 1rem; border-radius: 4px; margin-bottom: 1rem; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #dcfce7; color: #166534; }