body {
    background-color: #eef4ff;
    color: #1f2430;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1em;
    margin: 10px;
}

header {
    background-color: #dbe7ff;
    padding: 12px;
    border-radius: 8px;
}

.responsive {
    max-width: 100%;
    height: auto;
    border: 1px solid #51471a;
    border-radius: 10px;
}

h1 {
    text-align: center;
}

nav {
    text-align: center;
    margin: 15px;
    padding: 10px;
    background-color: #c9dafc;
    border-radius: 10px;
}

nav a {
    color: #0b2a5b;
    text-decoration: none;
    margin: 8px;
    font-weight: bold;
}

main {
    background-color: #ffffff;
    padding: 16px;
    border-radius: 8px;
}

img, iframe, audio {
    display: block;
    margin: 15px auto;
    max-width: 100%;
}

figure {
    text-align: center;
}

figcaption {
    font-style: italic;
    margin-top: 8px;
}

footer {
    text-align: center;
    margin-top: 20px;
    padding: 12px;
    background-color: #dbe7ff;
    border-radius: 8px;
}