body {
  font-family: Arial, sans-serif;
  background: #111;
  color: #fff;
  text-align: center;
  padding: 40px;
}

h1 {
  margin-bottom: 20px;
}

button {
  padding: 12px 24px;
  margin-top: 20px;
  font-size: 16px;
  background-color: #f90;
  border: none;
  color: white;
  cursor: pointer;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

button:hover {
  background-color: #fb3;
}

#opcoes button {
  width: 80%;
  display: block;
  margin: 10px auto;
}

img {
  width: 200px;
  max-width: 90%;
  margin: 20px auto;
  display: block;
  border-radius: 8px;
}

.principal-img {
  width: 180px;
}