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

header {
  background-color: #111;
  color: white;
  padding: 15px;
  text-align: center;
}

nav {
  margin-top: 10px;
}

nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}

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

main {
  max-width: 1000px;
  margin: 40px auto;
  padding: 20px;
  background-color: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#image-container {
  text-align: center;
}

#image-container img {
  width: 80%;
  max-width: 900px;
  margin-bottom: 20px;
}