body {
  display: flex;
  justify-content: center;
  height: 100vh;
}

main {
  text-align: center;
  height: 500px;
  width: 40%;

}

.luzes {
  display: flex;
  justify-content: center;
  margin: 10px;
  gap: 10px;
}
.circle {
  border-radius: 100%;

  width: 50px;
  height: 50px;
}

.off {
  background: grey;
}

.on {
  background: red;
}
button {
  margin: 20px 0;
  padding: 10px;
  border-radius: 4px;
  text-transform: uppercase;
  font-weight: bold;
  background: #333;
  color: #fff;
  font-size: 1.2rem;
}

#result {
  text-transform: uppercase;
  font-weight: bold;
  font-size: 1.8rem;
}