body {
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: aqua;
    color: #fff;
    padding: 1em;
    text-align: center;
}

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

nav li {
    display: inline-block;
    margin-right: 20px;
}

nav a {
    color: #f20505;
    text-decoration: none;
    font-size: large;
    font-weight: bold;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2em;
}

button {
    background-color: #4CAF50;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

footer {
    background-color: #333;
    color: #fff;
    padding: 1em;
    text-align: center;
    clear: both;
}