/* ==========================================================================
   BASE RESET & TYPOGRAPHY
   ========================================================================== */
body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
    display: flex;
    flex-direction: row; 
    min-height: 100vh;
}

/* ==========================================================================
   SIDEBAR
   ========================================================================== */
.sidebar {
    width: 250px;
    background-color: #0f172a;
    color: white;
    padding: 30px 20px;
    box-sizing: border-box;
    flex-shrink: 0; 
}

.sidebar h2 {
    margin: 0 0 5px 0;
    color: #10b981;
    font-size: 1.5rem;
}

.sidebar p {
    margin: 0;
    color: #94a3b8;
    font-size: 0.9rem;
}

/* ==========================================================================
   MAIN CONTENT & HEADER
   ========================================================================== */
.main-content {
    flex-grow: 1;
    padding: 40px;
    box-sizing: border-box;
    overflow-y: auto;
    width: 100%;
}

header h1 {
    margin-top: 0;
    font-size: 1.8rem;
    color: #0f172a;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 15px;
    margin-bottom: 30px;
}

.section-title {
    margin-top: 50px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
    color: #0f172a;
}

.section-desc {
    color: #64748b;
    font-size: 0.95rem;
    margin-top: -15px;
    margin-bottom: 25px;
    line-height: 1.5;
    max-width: 850px;
}

/* ==========================================================================
   KPI GRID
   ========================================================================== */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.kpi-card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.kpi-card h3 {
    margin: 0 0 10px 0;
    font-size: 0.85rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-card .value {
    font-size: 2.2rem;
    font-weight: 700;
    color: #0f172a;
}

.kpi-card .value.valid { color: #2563eb; }
.kpi-card .value.eco { color: #10b981; }

/* ==========================================================================
   CHARTS & EVALUATION GRID
   ========================================================================== */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr; 
    gap: 30px;
}

.chart-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    box-sizing: border-box;
    width: 100%;
}

.chart-card h3 {
    margin: 0;
    color: #1e293b;
    font-size: 1.1rem;
}

.chart-card .subtitle {
    margin: 5px 0 20px 0;
    font-size: 0.85rem;
    color: #64748b;
}

canvas {
    width: 100% !important;
    max-height: 300px;
}

.small-chart-container {
    max-width: 350px;
    margin: 0 auto;
}

.eval-box {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    margin-top: 15px;
}

.eval-score {
    font-size: 2rem;
    font-weight: bold;
    color: #166534;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ========================================================================== */

@media (max-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr; 
        gap: 20px;
    }
}

@media (max-width: 768px) {
    body {
        flex-direction: column; 
    }

    .sidebar {
        width: 100%;
        padding: 15px 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        z-index: 10;
    }

    .sidebar h2 {
        font-size: 1.3rem;
        margin: 0;
    }

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

    .main-content {
        padding: 20px 15px; 
    }

    header h1 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr); 
        gap: 15px;
    }

    .kpi-card {
        padding: 15px;
    }

    .kpi-card .value {
        font-size: 1.8rem; 
    }

    .chart-card {
        padding: 15px;
    }

    .section-title {
        font-size: 1.25rem;
        margin-top: 30px !important;
    }
    
    .section-desc {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr; 
    }
    
    .sidebar {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
}