body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    background-color: #333;
    display: flex;
}

nav li {
    margin: 0;
}

nav a {
    display: block;
    padding: 0.75rem 1rem;
    color: #fff;
    text-decoration: none;
}

nav a:hover {
    background-color: #555;
}

main {
    padding: 1rem;
}

form div {
    margin-bottom: 0.5rem;
}

.error {
    color: #d9534f;
    margin-bottom: 1rem;
}