* {
    margin: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: #003366;
}

header {
    background-color: #003366;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

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

.banner {
    width: 100%; 
    height: auto; 
    margin: 20px 0;
}

section {
    padding: 5px;
    margin: 5px auto;
    width: 800px;
    background: rgb(135, 159, 211);
}

h1 {
    margin: 15px;
    font-size: 24px;
    color: #031629; 
}

p {
    margin: 15px;
}

img {
    margin: 10px;
}

img.pequena {
    width: 20%; 
}

footer {
    text-align: center;
    background-color: rgb(135, 159, 211);
    color: #000;
    padding: 5px;
}