.chart {
    width: 100%;
    height: 300px;
}
.charts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.chart-card {
    background: white;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}