* {
  box-sizing: border-box;
  font-family: 'Noto Sans KR', Sans-serif;
}
body { 
  margin: 0;
  background-color: gray;  
}
.container { 
  position: absolute;
  width: 400px; 
  height: 400px; 
  background-color: gray; 
  text-align: center; 
  margin-left: -200px; 
  margin-top: -200px; 
  left: 50%; 
  top: 50%; 
}