body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header, nav, section, footer {
    text-align: center;
    padding: 20px;
}

.logo {
    width: 750px;
    height: auto;
}

.banner {
    width: 100%;
    height: auto;
    margin-top: 20px;
}

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

nav ul li {
    display: inline;
    margin: 0 20px;
}

nav ul li a {
    text-decoration: none;
    color: #000;
}

footer {
    margin-top: 40px;
    padding: 20px;
    background-color: #f2f2f2;
}