* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
}

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

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 1.2em;
}

nav ul li a:hover {
    color: #f4f4f4;
    background-color: #555;
    padding: 5px 10px;
    border-radius: 5px;
}

section {
    margin: 20px auto;
    padding: 20px;
    max-width: 800px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    background-color: #333;
    color: #fff;
    padding: 10px 0;
    margin-top: 20px;
}