body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
}

header nav a {
    margin: 0 15px;
    color: #fff;
    text-decoration: none;
}

main {
    padding: 2rem;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

input[type="text"] {
    width: 100%;
    padding: 0.5rem;
    margin: 1rem 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

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

li {
    background-color: #fff;
    margin: 0.5rem 0;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

li a {
    color: #007BFF;
    text-decoration: none;
}