* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Times New Roman', Times, serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f9;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    font-size: 2em;
    color: #222;
}

main {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 20px;
}

section h2 {
    font-size: 1.5em;
    margin-bottom: 10px;
    color: #555;
}

pre {
    background: #f8f8f8;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Times New Roman', Times, serif;
}

.flowchart-placeholder {
    text-align: center;
    padding: 50px;
    background-color: #eef;
    border: 2px dashed #ccc;
    border-radius: 8px;
    color: #666;
}


