<!-- style.css -->
/* External Style Sheet */
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
background-color: #f4f4f4;
color: #333;
}
header, footer {
background-color: #222;
color: white;
text-align: center;
padding: 1rem;
}
nav ul {
display: flex;
list-style-type: none;
background-color: #444;
margin: 0;
padding: 0;
}
nav ul li {
flex: 1;
}
nav a {
display: block;
padding: 0.75rem;
color: white;
text-align: center;
text-decoration: none;
}
nav a:hover {
background-color: #666;
}
main {
max-width: 900px;
margin: auto;
padding: 1rem;
}
figure {
text-align: center;
}
img {
width: 100%;
max-width: 450px;
height: auto;
}
figcaption {
font-size: 0.9rem;
color: #555;
}
iframe {
    display: block;
    margin: 0 auto;
}
p {
	text-align: center;
}

h2 {
    text-align: center;
}