* {
  box-sizing: border-box;
  margin: 0 auto;
}

div {
  width: 500px;
}

img {
  width: 80%;
}

h1 {
  padding: 0.5em 0;
  font-family: cursive;
  font-size: 2rem;
}

button {
  border: solid blue 1px;
  font-size: 1.3rem;
  border-radius: 73px;
  padding: 0.5em 0;
  width: 184px;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

#error {
  color: red;
  font-size: 1rem;
}