카카오맵이 나오지를 않아요ㅠㅠㅠㅠ

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="layout.css" />
  </head>
  <body>
    <nav>
      <div class="inner">
        <div class="nav-container">
          <hi class="nav-title">맛집지도</hi>
          <button class="nav-contact">contact</button>
        </div>
      </div>
    </nav>

    <main>
      <section id="category">
        <div class="inner">
          <div class="category-container">
            <h2 class="category-title">맛집지도 카테고리를 선택해보세요</h2>
            <div class="category-list">
              <button class="category-item">한식</button>
              <button class="category-item">중식</button>
              <button class="category-item">일식</button>
              <button class="category-item">양식</button>
              <button class="category-item">분식</button>
              <button class="category-item">구이</button>
              <button class="category-item">회/초밥</button>
              <button class="category-item">기타</button>
            </div>
          </div>
        </div>
      </section>
      <!-- 카테고리 -->

      <div id="map" class="inner"></div>

      <!-- 카카오지도 -->
    </main>
    <script
      type="text/javascript"
      src="//dapi.kakao.com/v2/maps/sdk.js?appkey=b156fcbd2ea3a6340f64c07f5eaef559"
    ></script>
    <script src="layout.js"></script>
  </body>
</html>
@font-face {
  font-family: "KyoboHandwriting2020A";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_2112@1.0/KyoboHandwriting2020A.woff")
    format("woff");
  font-weight: normal;
  font-style: normal;
}

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

html {
  font-family: "KyoboHandwriting2020A";
  font-size: 10px;
}

nav {
  /* background-color: orange; */
}

.nav-container {
  padding: 1rem 0;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.nav-title {
  font-size: 3rem;
}

.nav-contact {
  font-size: 2.5rem;
  justify-content: right;
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

.category-title {
  font-size: 3.5rem;
}

.category-item {
  width: 25%;
  height: 5rem;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.6rem;
}

.category-item:hover {
  color: orange;
  cursor: pointer;
}

.inner {
  padding: 0 1.5rem;
}

@media all and (min-width: 1024px) {
  .inner {
    max-width: 1024px;
    margin: 0 auto;
  }
}

/* 카카오맵 css */

body {
  height: 100vh;
}

nav {
  height: 59px;
}

main {
  padding-top: 1.5rem;
  height: calc(100%-59px);
  display: flex;
  flex-direction: column;
}

#map {
  flex-grow: 1;
  width: 100%;
  height: 100%;
}
var container = document.getElementById("map"); //지도를 담을 영역의 DOM 레퍼런스
var options = {
  //지도를 생성할 때 필요한 기본 옵션
  center: new kakao.maps.LatLng(33.450701, 126.570667), //지도의 중심좌표.
  level: 3, //지도의 레벨(확대, 축소 정도)
};

var map = new kakao.maps.Map(container, options); //지도 생성 및 객체 리턴

이렇게 했는데 지도가 안 나와요ㅠㅠ
어디가 틀린 걸까요
인프런 커뮤니티 질문&답변
