1. 기준
1) 15px기준 rem단위 사용
font-family:'Pretendard';
font-style:normal;
src:url(../font/Pretendard-Medium.woff2);
format('woff2');
font-family:'Pretendard';
font-style:600;
src:url(../font/Pretendard-SemiBold.woff2);
format('woff2');
font-family:'Pretendard';
font-style:bold;
src:url(../font/Pretendard-Bold.woff2);
format('woff2');
2. 반응형 중단점(Break Point) Width 360px
1) Default Device body{font-size: 15px;}
2) Small Device body{font-size: 13.5px;}