body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f8f8f8;
    color: #333;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: auto;
    padding: 20px;
}

.topnav {
    background: #333;
    overflow: hidden;
}

.topnav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
}

.topnav a.active, .topnav a:hover {
    background-color: #4CAF50;
    color: white;
}

.content {
    background: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.content h1 {
    color: #444;
}

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

.content li {
    margin: 10px 0;
}

footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 10px;
    position: fixed;
    width: 100%;
    bottom: 0;
}

footer p {
    margin: 0;
}