body {
    font-family: sans-serif;
    margin: 0;
}

header {
    background-color: #f8f9fa;
    padding: 20px;
    border-bottom: 1px solid #dee2e6;
}

main {
    padding: 20px;
}

footer {
    background-color: #f8f9fa;
    padding: 20px;
    border-top: 1px solid #dee2e6;
    text-align: center;
}