body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

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

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

.header .nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

.section {
    padding: 2rem 0;
    text-align: left;
    background-color: #fff;
    margin-bottom: 1rem;
}

.section:nth-child(even) {
    background-color: #e4e4e4;
}

.section .container {
    max-width: 800px;
    margin: 0 auto;
}

.section img {
    width: 200px;
    margin-top: 1rem;
}

.footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}

.footer .container {
    max-width: 800px;
    margin: 0 auto;
}