body {
  font-family: Arial, sans-serif;
  text-align: center;
}

header {
  background-color: #333;
  color: #fff;
  padding: 20px;
}

main {
  margin: 20px;
}

img {
  width: 300px;
  height: 300px;
  border-radius: 50%;
}

button {
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}