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

body {
    width: 100%;
    height: 100vh;
    overflow-x: hidden;
}

/* ===== GNB ===== */

.gnb {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 30;
    background-color: rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid #393939;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.gnb.is-active {
    background: #fff;
    border-bottom-color: #e5e5e5;
}

.gnb_wrap {
    position: relative;
}

/* ----- 상단 바 (menu_div) ----- */

.menu_div {
    height: 90px;
    padding: 0 40px;
    align-items: center;
}

.menu_div .logo {
    display: flex;
    align-items: center;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.gnb.is-active .menu_div .logo {
    color: #222;
}

.menu_div .menu {
    display: flex;
    align-items: center;
    height: 100%;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease-in-out;
}

/* 밑줄: JS 상태 추적 없이 실제 hover 위치와 항상 일치하도록 순수 CSS로만 처리 */

.menu_div .menu:hover {
    border-bottom-color: #222;
}

.gnb_wrap:has(#subMenuDiv .menu[data-index="0"]:hover) #menuDiv .menu[data-index="0"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="1"]:hover) #menuDiv .menu[data-index="1"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="2"]:hover) #menuDiv .menu[data-index="2"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="3"]:hover) #menuDiv .menu[data-index="3"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="4"]:hover) #menuDiv .menu[data-index="4"] {
    border-bottom-color: #222;
}

.menu_div .menu a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

.gnb.is-active .menu_div .menu a {
    color: #222;
}

/* ----- 공유 폭 정의: menu_div / sub_menu_div 양쪽 동일 적용 ----- */
/* 로고/메뉴/로그인 폭은 이 3개 규칙이 유일한 기준. 두 줄 다 여기서만 폭이 정해짐 */

.menu_div {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1)
}

.menu_div,
.sub_menu_div {
    display: flex;
}

.logo {
    flex-shrink: 0;
    width: 220px;
}
.menu_div .logo a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.gnb.is-active .menu_div .logo a {
    color: #222;
}

.menu {
    flex: 1;
    margin-bottom: -1px;
}

.login {
    flex-shrink: 0;
    width: 160px;
}

/* ----- 상단 바 (menu_div) ----- */

.menu_div {
    height: 90px;
    padding: 0 40px;
    align-items: center;
}

.menu_div .logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.gnb.is-active .menu_div .logo {
    color: #222;
}

.menu_div .menu {
    display: flex;
    align-items: center;
    height: 100%;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease-in-out;
}

/* 밑줄: JS 상태 추적 없이 실제 hover 위치와 항상 일치하도록 순수 CSS로만 처리 */

.menu_div .menu:hover {
    border-bottom-color: #222;
}

.gnb_wrap:has(#subMenuDiv .menu[data-index="0"]:hover) #menuDiv .menu[data-index="0"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="1"]:hover) #menuDiv .menu[data-index="1"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="2"]:hover) #menuDiv .menu[data-index="2"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="3"]:hover) #menuDiv .menu[data-index="3"],
.gnb_wrap:has(#subMenuDiv .menu[data-index="4"]:hover) #menuDiv .menu[data-index="4"] {
    border-bottom-color: #222;
}

.menu_div .menu a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

.gnb.is-active .menu_div .menu a {
    color: #222;
}

.menu_div .login {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.menu_div .login:hover a,
.gnb_wrap:has(#subMenuDiv .login:hover) #menuDiv .login a {
    border-color: #fff;
    opacity: 0.85;
}

.menu_div .login a {
    display: inline-block;
    border: 1px solid #fff;
    border-radius: 20px;
    color: #fff;
    text-decoration: none;
    font-size: 13px;
    padding: 8px 22px;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.gnb.is-active .menu_div .login a {
    color: #222;
    border-color: #222;
}

/* ----- 서브 패널 (sub_menu_div) ----- */

.sub_menu_div {
    position: absolute;
    top: 90px;
    left: 0;
    width: 100%;
    padding: 30px 40px;
    background: #fff;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none; /* 닫힌 상태에서는 마우스 이벤트 자체를 받지 않음 */
    transition: max-height 0.35s ease, opacity 0.35s ease;
    border-top: 1px solid rgba(0, 0, 0, 0.3);
}

.sub_menu_div.is-open {
    max-height: 260px;
    opacity: 1;
    pointer-events: auto;
}

.sub_menu_div .menu,
.sub_menu_div .login {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.sub_menu_div a {
    align-self: flex-start;
    color: #222;
    text-decoration: none;
    font-size: 14px;
    padding-bottom: 4px;
    border-bottom: 1px solid transparent;
    transition: all 0.5s ease-in-out;
}

.sub_menu_div a:hover {
    border-bottom-color: #222;
}