body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
    color: #212529;
}
header, footer {
    background-color: #343a40;
    color: white;
    padding: 1em;
    text-align: center;
}
nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
}
main {
    padding: 2em;
    max-width: 800px;
    margin: auto;
}
h1, h2 {
    color: #212529;
}
button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
form {
    display: flex;
    flex-direction: column;
}
form input, form textarea {
    margin-bottom: 10px;
    padding: 8px;
    font-size: 1em;
}