body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f5f5f5;
    color: #333;
}

h1 {
    text-align: center;
    color: #444;
}

#metrics {
    margin: 20px auto;
    padding: 15px;
    max-width: 500px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

#metrics p {
    font-size: 18px;
    margin: 8px 0;
}

canvas {
    display: block;
    margin: 20px auto;
    max-width: 600px;
}

button {
    display: block;
    margin: 0 auto 20px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #2196f3;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #1976d2;
}