body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
    color: #343a40;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

h1, h2 {
    color: #007bff;
}

nav {
    margin-bottom: 20px;
}

nav a {
    margin-right: 15px;
    text-decoration: none;
    color: #007bff;
}

nav a:hover {
    text-decoration: underline;
}

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

li {
    margin-bottom: 10px;
}

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

label {
    margin-top: 10px;
    margin-bottom: 5px;
}

input[type="text"],
input[type="number"],
textarea,
select {
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 16px;
}

button {
    margin-top: 20px;
    padding: 10px 15px;
    background-color: #007bff;
    border: none;
    color: white;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

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

pre {
    background-color: #f8f9fa;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
}