body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

h1 {
    text-align: center;
    margin: 20px 0;
}

/* Navigation styles */
nav {
    background-color: #333;
    overflow: hidden;
}

nav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}

nav a:hover {
    background-color: #ddd;
    color: black;
}

/* Content styles */
p {
    margin: 20px;
    line-height: 1.6;
}

#activity1-content {
    padding: 20px;
    background-color: #fff;
    margin: 20px;
    border-radius: 8px;
}

#activity1-content h2 {
    margin-top: 0;
    color: #2c3e50;
}

#activity1-content ul {
    list-style-type: disc;
    padding-left: 20px;
}