:root {
    --primary: #0056b3;
    --secondary: #f8f9fa;
    --text: #333;
    --border: #dee2e6;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text);
    background-color: #f4f4f9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: white;
    box-shadow: var(--shadow);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    margin: 0;
    color: var(--primary);
}

nav button {
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    color: var(--text);
}

nav button.active {
    font-weight: bold;
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

.controls {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

select {
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
}

/* Dashboard Grid */
#dashboard-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
}

.chart-card {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    margin-top: 0;
    font-size: 1rem;
    color: #555;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.chart-container.large {
    height: 500px;
}

/* Utilities */
.hidden {
    display: none;
}

.checkbox-list {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border);
    padding: 0.5rem;
    background: white;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

button#btn-generate-compare {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}

button#btn-generate-compare:hover {
    background-color: #004494;
}

/* Chart Type Buttons */
.controls button {
    background: white;
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 4px;
    margin-left: 0.5rem;
}

.controls button.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

footer {
    text-align: center;
    padding: 2rem;
    color: #777;
    margin-top: 2rem;
}

@media (max-width: 600px) {
    #dashboard-content {
        grid-template-columns: 1fr;
    }
}

/* ... existing styles ... */

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.data-table th, .data-table td {
    border: 1px solid #dee2e6;
    padding: 0.5rem;
    text-align: left;
}

.data-table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.data-table tr:nth-child(even) {
    background-color: #f9f9f9;
}