body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}

h1 {
    text-align: center;
    margin-top: 20px;
}

p {
    text-align: center;
    font-size: 16px;
    margin: 10px auto;
}

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

.top-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: center;
}

.top-nav li {
    margin: 0;
    padding: 10px;
}

.top-nav a {
    text-decoration: none;
    color: #fff;
    padding: 10px 20px;
    display: block;
}

.top-nav a:hover {
    background-color: #575757;
}