body {
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
    margin: 0;
    padding: 0;
}
header {
    background-color: #3b5998;
    color: white;
    padding: 20px;
    text-align: center;
}
nav ul {
    list-style: none;
    padding: 0;
    margin: 10px 0 0 0;
    display: flex;
    justify-content: center;
    gap: 15px;
}
nav ul li {
    display: inline;
}
nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}
nav ul li a:hover {
    text-decoration: underline;
}
main {
    padding: 20px;
    margin: 20px;
    background-color: white;
    border-radius: 10px;
}
section {
    margin-bottom: 30px;
}
h1, h2 {
    color: #2a2a2a;
}
p {
    text-align: justify;
}
ul {
    padding-left: 20px;
}
img {
    display: block;
    margin: 10px auto;
    max-width: 90%;
    border-radius: 8px;
}
footer {
    background-color: #3b5998;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 20px;
}
section {
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 8px;
}
nav a {
    text-transform: uppercase;
}