body {
    background-color: #f9f9f9;
    color: #333;
    font-family: Arial, sans-serif;
    margin: 10px;
    line-height: 1.6;
}

h1 {
    text-align: center;
    font-size: 2.5em;
}

h2 {
    text-align: center;
    font-size: 1.8em;
}

nav {
    text-align: center;
}

footer {
    text-align: center;
}

figure {
    text-align: center;
    margin: 20px 0;
}

figcaption {
    font-style: italic;
    margin-top: 8px;
    color: #555;
}

section {
    margin-bottom: 40px;
}

img.gif {
    max-width: 100%;
    height: auto;
    width: 100%; 
    margin: 0;   
    display: inline; 
}


audio,
video,
iframe {
    display: block;
    margin: 20px auto;
}