body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    color: #333;
}

header, footer {
    background-color: #333;
    color: white;
    padding: 1em;
    text-align: center;
}

main {
    padding: 1em;
    max-width: 800px;
    margin: auto;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

section {
    margin-bottom: 2em;
}

h1, h2 {
    margin-top: 0;
}

a {
    color: #007bff;
}