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

    body {
        font-family: 'Segoe UI', sans-serif;
        background: #f4f6f9;
        color: #333;
    }

    nav {
        background: #2c3e50;
        color: white;
        padding: 1rem 2rem;
    }

    nav h1 {
        font-size: 1.4rem;
    }

    .hero {
        background: #3498db;
        color: white;
        padding: 2.5rem 2rem;
        text-align: center;
    }

    .hero h2 {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }

    .hero p {
        font-size: 1rem;
        opacity: 0.9;
    }
    .kpi-section {
        max-width: 1100px;
        margin: 2rem auto;
        padding: 0 1.5rem;
    }
    
    .kpi-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
    }
    
    .kpi-card {
        background: white;
        border-radius: 10px;
        padding: 1.5rem;
        text-align: center;
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        border-top: 4px solid #3498db;
    }
    
    .kpi-number {
        font-size: 1.8rem;
        font-weight: 700;
        color: #2c3e50;
    }
    
    .kpi-label {
        font-size: 0.85rem;
        color: #777;
        margin-top: 0.4rem;
    }
    .charts {
        max-width: 1100px;
        margin: 2rem auto;
        padding: 0 1.5rem;
    }

    .charts h3 {
        font-size: 1.3rem;
        margin-bottom: 1.5rem;
        color: #2c3e50;
    }

    .chart-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .chart-card {
        background: white;
        border-radius: 10px;
        padding: 1.25rem;
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }

    .chart-card h4 {
        font-size: 0.95rem;
        color: #555;
        margin-bottom: 1rem;
    }

    .chart-card img {
        width: 100%;
        border-radius: 6px;
    }

    footer {
        text-align: center;
        padding: 1.5rem;
        background: #2c3e50;
        color: white;
        margin-top: 3rem;
        font-size: 0.85rem;
    }

/* RESPONSIVE */
@media (max-width: 768px) {

    nav {
        padding: 1rem;
    }

    nav h1 {
        font-size: 0.95rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .hero h2 {
        font-size: 1.4rem;
    }

    .hero p {
        font-size: 0.85rem;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .kpi-section {
        padding: 0 1rem;
        margin: 1.5rem auto;
    }

    .chart-grid {
        grid-template-columns: 1fr;
    }

    .charts {
        padding: 0 1rem;
        margin: 1.5rem auto;
    }

    .kpi-number {
        font-size: 1.3rem;
    }

    .kpi-card {
        padding: 1rem;
    }
}

@media (max-width: 480px) {

    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .hero h2 {
        font-size: 1.2rem;
    }

    nav h1 {
        font-size: 0.85rem;
    }

    .chart-card {
        padding: 1rem;
    }

    .chart-card h4 {
        font-size: 0.8rem;
    }
}