/**
 * menu.css
 * 메가메뉴 (PC), 햄버거 메뉴 (모바일), sticky 효과
 */

/* ========================================
   메뉴 색상 변수
======================================== */
:root {
    --menu-bg: #2c3e50;
    --menu-text: #ffffff;
    --menu-hover-bg: #34495e;
    --menu-active-bg: #3498db;
    --submenu-bg: #ffffff;
    --submenu-text: #333;
    --submenu-hover-bg: #ecf0f1;
}

/* ========================================
   메뉴 래퍼 (브라우저 100% 배경)
======================================== */
.menu-wrapper {
    width: 100%;
    background: var(--menu-bg);
    position: relative;
    z-index: 1000;
}

/* ========================================
   Sticky 효과 (스크롤 시 고정)
======================================== */
.menu-wrapper.sticky {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
    }
    to {
        transform: translateY(0);
    }
}

/* ========================================
   메뉴 컨테이너 (1200px 중앙)
======================================== */
.menu-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
}

/* ========================================
   작은 로고 (sticky 시에만 표시)
======================================== */
.sticky-logo {
    display: none;
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
}

.sticky-logo img {
    height: 30px;
    width: auto;
}

.menu-wrapper.sticky .sticky-logo {
    display: block;
}

.menu-wrapper.sticky .menu-container {
    padding-left: 150px; /* 로고 공간 확보 */
}

/* ========================================
   모바일 햄버거 버튼
======================================== */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--menu-text);
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ========================================
   1차 메뉴 (PC: flex space-between)
======================================== */
.main-nav {
    display: block;
}

.menu-list {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-item {
    flex: 1;
    text-align: center;
}

.menu-link {
    display: block;
    padding: 15px 10px;
    color: var(--menu-text);
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.menu-link:hover,
.menu-item.active .menu-link {
    background-color: var(--menu-hover-bg);
    color: var(--menu-text);
}

/* 현재 페이지 메뉴 */
.menu-item.current .menu-link {
    background-color: var(--menu-active-bg);
}

/* ========================================
   2차 서브메뉴 (PC: 전체 펼침)
======================================== */
.submenu-wrapper {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--submenu-bg);
    border-top: 2px solid var(--menu-active-bg);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

/* 메뉴바에 마우스 올리면 서브메뉴 전체 표시 */
.menu-wrapper:hover .submenu-wrapper {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    display: flex;
    justify-content: space-between;
}

.submenu-column {
    flex: 1;
    padding: 0 var(--spacing-sm);
}

.submenu-title {
    font-weight: 600;
    color: var(--submenu-text);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--border-light);
}

.submenu-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.submenu-item {
    min-height: 28px; /* 빈 공간 확보 */
}

.submenu-item.empty {
    visibility: hidden;
}

.submenu-link {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--submenu-text);
    font-size: var(--font-size-sm);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.submenu-link:hover {
    background-color: var(--submenu-hover-bg);
    color: var(--primary-color);
}

/* ========================================
   반응형 - 모바일 (767px 이하)
======================================== */
@media (max-width: 767px) {
    /* Sticky 비활성화 */
    .menu-wrapper.sticky {
        position: relative;
    }
    
    .sticky-logo {
        display: none !important;
    }
    
    /* 햄버거 버튼 표시 */
    .mobile-menu-toggle {
        display: flex;
        position: absolute;
        right: var(--spacing-md);
        top: 50%;
        transform: translateY(-50%);
        z-index: 20;
    }
    
    /* 1차 메뉴 숨김 (햄버거 클릭 시 표시) */
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--menu-bg);
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .menu-list {
        flex-direction: column;
        align-items: stretch;
    }
    
    .menu-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .menu-link {
        text-align: left;
        padding: 15px var(--spacing-md);
        position: relative;
    }
    
    /* 서브메뉴 있는 메뉴에 화살표 */
    .menu-item:has(+ .submenu-column) .menu-link::after {
        content: '▼';
        position: absolute;
        right: var(--spacing-md);
        font-size: 10px;
        transition: transform 0.3s ease;
    }
    
    .menu-item.active:has(+ .submenu-column) .menu-link::after {
        transform: rotate(180deg);
    }
    
    /* 서브메뉴 아코디언 */
    .submenu-wrapper {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--menu-hover-bg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .menu-wrapper:hover .submenu-wrapper {
        max-height: 0; /* 모바일에서는 호버 효과 비활성화 */
    }
    
    .submenu-wrapper.active {
        max-height: 500px;
    }
    
    .submenu-container {
        flex-direction: column;
        padding: var(--spacing-sm) 0;
    }
    
    .submenu-column {
        padding: 0;
    }
    
    .submenu-title {
        display: none;
    }
    
    .submenu-list {
        padding: 0 var(--spacing-md);
    }
    
    .submenu-link {
        color: rgba(255, 255, 255, 0.9);
        padding: 10px var(--spacing-md);
    }
    
    .submenu-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: #fff;
    }
}