body {
margin: 0;
font-family: Arial, sans-serif;
background-color: #f4f4f4;
}

nav {
background-color: #6b2fb9;
text-align: center;
padding: 10px;
}

nav a {
color: white;
text-decoration: none;
margin: 15px;
font-weight: bold;
}

nav a:hover {
text-decoration: underline;
}

main {
padding: 20px;
text-align: center;
}

main img {
max-width: 100%;
height: auto;
border-radius: 10px;
}

iframe {
width: 560px;
height: 315px;
max-width: 100%;
border: 0;
}

footer {
background-color: #333;
color: white;
text-align: center;
padding: 10px;
}

/* Responsive */
@media (max-width: 768px) {
nav a {
display: block;
margin: 10px 0;
}

iframe {
width: 100%;
height: 250px;
}
}