body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f2f2f2;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1rem;
    text-align: center;
}

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

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

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

main {
    padding: 20px;
    background-color: white;
    margin: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #4CAF50;
    color: white;
    position: relative;
    bottom: 0;
    width: 100%;
}