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

#opponent-choice{
  width: 240px;
  height: 240px;
  margin-top: 10px;
}

#your-choice{
  width: 240px;
  height: 240px;
  margin-top: 10px;
}

#choices{
  width: 300px;
  height: 180px;
  margin: 0 auto;
  margin-top: 10px;
}

#choices img{
  width: 100px;
  height: 100px;
}