body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
}
header {
    background: #397949;
    color: white;
    padding: 0.1rem;
    text-align: center;
}
nav {
    background: #333;
    padding: 0.5rem;
}
nav a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
}
main {
    padding: 2rem;
}
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    position: fixed;
    bottom: 0;
    width: 100%;
}