* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #007bff;
    color: white;
    padding: 20px 0;
    text-align: center;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

nav a:hover {
    color: #ffcc00;
}

main {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 40px;
}

h2 {
    border-bottom: 2px solid #007bff;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

pre {
    background: #f8f9fa;
    padding: 10px;
    border-radius: 5px;
    overflow: auto;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    margin: 10px 0 5px;
}

input,
textarea {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    margin-top: 10px;
    padding: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

footer {
    text-align: center;
    padding