우측고정 네이게이션 작성 시 오류

안녕하세요.

'왼쪽 개별 네비게이션' 완료 후 CSS만 변경해 '우측고정 네이게이션'을 만드는 와중에 잘 안되는게 있어 질문 드립니다.

231113_캡처1.PNG

'세로 기본형' 일때는 호버가 잘 되었는데 CSS 변경 후 sub-menu 가 고정이 되지도 않고 호버도 되지 않아요... 영상 보면서 마크업 비교 해봐도(1시간째...ㅠㅠ) 틀린 부분이 없는데 작동되지 않아 답답합니다.뭐가 잘못 되었을까요?

231113_움짤.gif

<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <title>D1</title>
    <link rel="stylesheet" href="css/style.css">
</head>
<body>

    <div class="contaniner">
        <div class="main-content">
            <div class="left">
                <header>
                    <div class="header-logo"></div>
                    <div class="navi">
                        <!-- Navigation -->
                        <ul class="menu">
                            <li>
                                <a href="#none">MENU-1</a>
                                <div class="sub-menu">
                                    <a href="#none">SUB-MENU-1</a>
                                    <a href="#none">SUB-MENU-2</a>
                                    <a href="#none">SUB-MENU-3</a>
                                    <a href="#none">SUB-MENU-4</a>
                                </div>
                            </li>
                            <li>
                                <a href="#none">MENU-2</a>
                                <div class="sub-menu">
                                    <a href="#none">SUB-MENU-1</a>
                                    <a href="#none">SUB-MENU-2</a>
                                    <a href="#none">SUB-MENU-3</a>
                                    <a href="#none">SUB-MENU-4</a>
                                </div>
                            </li>
                            <li>
                                <a href="#none">MENU-3</a>
                                <div class="sub-menu">
                                    <a href="#none">SUB-MENU-1</a>
                                    <a href="#none">SUB-MENU-2</a>
                                    <a href="#none">SUB-MENU-3</a>
                                    <a href="#none">SUB-MENU-4</a>
                                </div>
                            </li>
                            <li>
                                <a href="#none">MENU-4</a>
                                <div class="sub-menu">
                                    <a href="#none">SUB-MENU-1</a>
                                    <a href="#none">SUB-MENU-2</a>
                                    <a href="#none">SUB-MENU-3</a>
                                    <a href="#none">SUB-MENU-4</a>
                                </div>
                            </li>
                        </ul>
                        <!-- Navigation -->
                    </div>
                    <div class="spot-menu"></div>
                </header>
            </div>
            <div class="right">
                <div class="slide">
                    <div class="slide-image"></div>
                    <div class="slide-banner"></div>
                </div>
                <div class="items">
                    <div class="shortcut"></div>
                    <div class="news-gallery"></div>
                </div>
            </div>
        </div>
        <footer>
            <div class="footer-logo"></div>
            <div class="copyright"></div>
            <div class="sns"></div>
        </footer>
    </div>

    <script src="script/jquery-1.12.4.js"></script>
    <script src="script/custom.js"></script>

</body>
</html>

@charset "utf-8";

body {
    margin: 0;
    background-color: #fff;
    color: #333;
}
a {
    text-decoration: none;
    color: inherit;
}

/* Entire Layout */
.container {}
.main-content {
    display: flex;
}
.main-content > div {
    border: 1px solid #000;
}
.left {
    width: 200px;
}
.right {
    width: calc(100% - 200px);
}

/* Header */
header {}
header > div {
    border: 1px solid red;
}
.header-logo {
    height: 100px;
}
.navi {
    height: 400px;
}
.spot-menu {
    height: 50px;
}

/* Slide */
.slide {
    height: 400px;
    position: relative;
}
.slide-image {
    border: 1px solid #000;
    height: 400px;
}
.slide-banner {
    width: 150px;
    height: 300px;
    position: absolute;
    top: 0;
    right: 0;
}

/* shortcut */
.shortcut {
    border: 1px solid #000;
    height: 200px;
}

/* Nesw & gallery */
.news-gallery {
    border: 1px solid #000;
    height: 250px;
}

/* footer */
footer {
    display: flex;
}
footer > div {
    border: 1px solid #000;
    height: 100px;
}
.footer-logo {
    width: 200px;
}
.copyright {
    width: calc(100% - 430px);
}
.sns {
    width: 230px;
}

/* Navi gation */
.menu {
    padding: 0;
    list-style: none;
    width: 90%;
    margin: auto;
    margin-top: 15px;
    position: relative;
}
.menu li {
    text-align: center;
}
.menu li > a {
    border: 1px solid #000;
    display: block;
    padding: 5px;
    transition: 0.5s;
}
.menu li:hover > a {
    background-color: #000;
    color: #fff;
}
.sub-menu {
    border: 1px solid #000;
    display: none;
    position: absolute;
    top: 0;
    left: 100%;
    width: 100%;
    height: 200px;
    background-color: #000;
}
.sub-menu a {
    display: block;
    padding: 5px;
    transition: 0.5s;
    color: #fff;
}
.sub-menu a:hover {
    background-color: #fff;
    color: #000;
}

/* Navigation */
$('.menu li').mouseenter(function(){
    $(this).children('.sub-menu').stop().slideDown()
})
$('.menu li').mouseleave(function(){
    $(this).children('.sub-menu').stop().slideUp()
})

인프런 커뮤니티 질문&답변