body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

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

header nav ul {
    list-style: none;
    padding: 0;
}

header nav ul li {
    display: inline;
    margin: 0 10px;
}

header nav ul li a {
    color: white;
    text-decoration: none;
}

section {
    padding: 20px;
    margin: 20px;
    background-color: white;
    border-radius: 5px;
}

#portfolio .portfolio-item {
    display: inline-block;
    width: 45%;
    margin: 10px;
    text-align: center;
}

#portfolio img {
    max-width: 100%;
    border-radius: 5px;
}

footer {
    background-color: #333;
    color: white;
    padding: 10px;
    text-align: center;
}