body {
    font-family: Arial, sans-serif;
    margin: 0; padding: 0;
    background: #f4f4f4; color: #333;
}
header {
    background: #002244; color: #fff;
    padding: 1em;
    text-align: center;
}
nav a {
    margin: 0 1em;
    color: #ddd;
    text-decoration: none;
}
main {
    padding: 2em;
}
footer {
    text-align: center;
    padding: 1em;
    background: #222;
    color: #ccc;
    font-size: 0.9em;
}
form {
    max-width: 500px;
    margin: auto;
    display: flex;
    flex-direction: column;
}
form label {
    margin: 0.5em 0;
}
form input, form textarea {
    padding: 0.5em;
    width: 100%;
}
form button {
    margin-top: 1em;
    padding: 0.75em;
    background: #0066cc;
    color: #fff;
    border: none;
    cursor: pointer;
}