body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
body { font-family: Arial, sans-serif; padding: 20px; }
form {
    /*max-width: 400px; */
    margin: 0 auto; }
/*label, input, select { display: block; margin: 10px 0; }*/

header {
    background-color: #f4f4f4;
    text-align: center;
    padding: 1rem;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
}

nav ul li {
    margin: 0 15px;
}

section {
    margin-bottom: 30px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 20px;
}

.flow-chart pre {
    background-color: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
}

iframe {
    border: 1px solid #ddd;
}