body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}

.chart-container {
    width: 80%;
    margin: 20px 0;
}

canvas {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}