body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
}

.container {
    width: 80%;
    max-width: 800px;
    margin: auto;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.summary {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card {
    background: #ffffff;
    border: 1px solid #dddddd;
    border-radius: 5px;
    padding: 20px;
    width: 30%;
    text-align: center;
}

canvas {
    margin: 20px 0;
}

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

th, td {
    border: 1px solid #dddddd;
    padding: 8px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}