David Lee djLeeeee

## index.html
<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>Math Challenge - 수학 챌린지</title>
<style>
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

* { margin: 0; padding: 0; box-sizing: border-box; }
	<!DOCTYPE html>
	<html lang="ko">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
	<title>Math Challenge - 수학 챌린지</title>
	<style>
	@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

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