body {
    font-family:'Times New Roman', Times, serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background: #007bff;
    color: #fff;
    padding: 20px 10px;
    text-align: center;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h2, h4 {
    color: #000000;
}

pre {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: "Courier New", Courier, monospace;
}
img {
    height: 500px;
    width: 700px;
}