body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f5f5;
}

header {
  background: #4CAF50;
  color: white;
  padding: 15px;
  text-align: center;
}

nav {
  background: #333;
  padding: 10px;
  text-align: center;
}

nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}

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

.container {
  padding: 20px;
  text-align: center;
}

img {
  max-width: 300px;
  margin-top: 20px;
  border-radius: 10px;
}

button {
  margin-top: 20px;
  padding: 10px 20px;
  background: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background: #45a049;
}

footer {
  margin-top: 40px;
  background: #222;
  color: #ccc;
  text-align: center;
  padding: 10px;
}