:root {
    --primary: #2563eb;
    --secondary: #64748b;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --success: #10b981;
    --danger: #ef4444;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
}

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

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.subtitle {
    color: var(--secondary);
    font-size: 1.1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    text-align: center;
}

.stat-card h3 {
    margin: 0;
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--secondary);
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 10px 0 0;
    color: var(--primary);
}

.charts-section {
    background: var(--card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    margin-bottom: 40px;
}

.chart-container {
    height: 400px;
}

.table-section {
    background: var(--card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

.filters {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

select {
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid #cbd5e1;
    font-family: inherit;
}

table.dataTable {
    border-collapse: collapse !important;
}

.diff-positive {
    color: var(--success);
    font-weight: 600;
}

.diff-negative {
    color: var(--danger);
    font-weight: 600;
}