* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

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

header {
    text-align: center;
    padding: 40px 0;
    background: white;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.filters {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    gap: 20px;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.filters label {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filters input {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.filters button {
    padding: 10px 20px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
}

.filters button:hover {
    background: #45a049;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 2.5em;
    color: #4CAF50;
    margin-bottom: 5px;
}

.stat-card p {
    color: #666;
}

.charts {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow-x: auto;
}

.recent {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.recent h2 {
    margin-bottom: 15px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f8f9fa;
    font-weight: 600;
}

tr:hover {
    background: #f8f9fa;
}

footer {
    text-align: center;
    padding: 20px;
    color: #666;
    margin-top: 20px;
}

.loading::after {
    content: 'Loading...';
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 20px 40px;
    border-radius: 8px;
    z-index: 1000;
}

/* Responsive */
@media (max-width: 768px) {
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    header h1 {
        font-size: 1.8em;
    }
    
    .chart-container {
        overflow-x: scroll;
    }
}