body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f9;
    margin: 0;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

/* Painel de Controle (Upload + Filtro) */
.control-panel {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-box select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ddd;
    font-size: 14px;
    min-width: 200px;
}

/* KPIs */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.kpi-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    text-align: center;
    border-top: 4px solid #3498db; /* Mudança visual */
}

.kpi-card h3 {
    margin: 0;
    font-size: 13px;
    text-transform: uppercase;
    color: #7f8c8d;
    letter-spacing: 0.5px;
}

.kpi-card p {
    margin: 10px 0 0;
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

/* Gráficos */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.chart-box {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    height: 350px;
    position: relative;
}

.full-width {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
    .full-width {
        grid-column: span 1;
    }
    .control-panel {
        flex-direction: column;
        align-items: stretch;
    }
}