body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
}

h1, h2, h3 {
    color: #444;
}

header {
    background: #6c757d;
    color: white;
    padding: 1rem 0;
    text-align: center;
}

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

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

main {
    padding: 2rem;
}

footer {
    background: #6c757d;
    color: white;
    text-align: center;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}