body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #f4f7f6; }
header { background: #2c3e50; color: white; padding: 1rem; text-align: center; }
.dashboard { padding: 2rem; }
.dashboard-card { padding: 20px; border: 1px solid #ddd; border-radius: 10px; margin-bottom: 20px; background: white; }
.kpi-value { font-size: 28px; font-weight: bold; color: #27ae60; }
@media (max-width: 768px) { .dashboard { display: block; } .dashboard-card { width: 100%; } }