body {
    font-family: "Segoe UI", sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 15px;
    text-align: center;
}

nav {
    background-color: #333;
    overflow: hidden;
}

nav a {
    display: inline-block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

nav a:hover {
    background-color: #4CAF50;
}

main {
    padding: 20px;
}

h1 {
    color: #4CAF50;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #eee;
    font-size: 0.9em;
}