@charset "utf-8";

/* 태그 선택자 사용 */
* {
  box-sizing: border-box;
}

div {
  width: 400px;
  height: 400px;
  padding: 30px;
  border: 2px solid dodgerblue;
}

span {
  display: block;
  width: 300px;
  height: 300px;
  margin: 10px;
  padding: 30px;
  border: 2px solid #ccc;
}

em {
  display: block;
  width: 120px;
  height: 80px;
  margin: 10px;
  padding: 20px;
  background-color: brown;
  color: white;
}