body, h1, h2, form, select, button {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    line-height: 1.6;
    padding: 20px;
    text-align: center;
    max-width: 100vw;
    overflow-x: hidden;
}

h1 {
    margin-bottom: 20px;
    font-size: 2em;
    color: #444;
}

h2 {
    margin-top: 30px;
    font-size: 1.5em;
    color: #555;
}

form {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    display: inline-block;
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 1.2em;
    margin-bottom: 10px;
}

select {
    padding: 10px;
    font-size: 1em;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 100%;
    max-width: 300px;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 1em;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

canvas {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 400px;
    height: 400px;
    margin: 0 auto;
}