body {
    background-color: #f8f9fa;
}

h1 {
    color: #343a40;
}

h2 {
    margin-top: 30px;
    color: #007bff;
}

h3 {
    margin-top: 20px;
    color: #007bff;
}

footer {
    margin-top: 40px;
    padding: 20px 0;
    background-color: #343a40;
    color: white;
}