/* 네비게이션 기본 스타일 */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    background: transparent;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo img {
    height: 56px;
    transition: opacity 0.3s ease;
}

.nav-logo .logo-white {
    display: block;
}

.nav-logo .logo-dark {
    display: none;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu > li > a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.15rem;
    transition: all 0.3s ease;
}

.nav-menu > li > a:hover {
    color: var(--primary-color);
}

/* 스크롤 시 네비게이션 스타일 */
.nav.scrolled {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav.scrolled .nav-logo .logo-white {
    display: none;
}

.nav.scrolled .nav-logo .logo-dark {
    display: block;
}

.nav.scrolled .nav-menu > li > a {
    color: #333;
}

.nav.scrolled .nav-menu > li > a:hover {
    color: var(--primary-color);
}

/* 모바일 토글 버튼 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    transition: all 0.3s ease;
    border-radius: 3px;
    display: block;
}

.nav.scrolled .nav-toggle span {
    background: #333;
}

/* 개별 드롭다운 메뉴 스타일 */
.nav-menu > li {
    position: relative;
}

.has-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background-color: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    min-width: 200px;
    padding: 10px 0;
    z-index: 1000;
    margin-top: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0.3s;
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0s;
}

.dropdown-menu li {
    list-style: none;
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.3s ease, color 0.3s ease;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background-color: #e8f0fe;
    color: var(--primary-color);
}

/* 드롭다운이 있는 메뉴 아이템에 화살표 표시 */
.has-dropdown > a:after {
    content: ' ▾';
    font-size: 12px;
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.has-dropdown:hover > a:after {
    transform: rotate(180deg);
}

/* 메가메뉴 스타일 */
.dropdown-menu.mega-menu {
    display: flex;
    min-width: 500px;
    padding: 20px;
    gap: 30px;
}

.mega-menu-column {
    flex: 1;
    list-style: none;
    padding: 0;
}

.mega-menu-title {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mega-menu-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mega-menu-list li {
    margin-bottom: 5px;
}

.mega-menu-list a {
    display: block;
    padding: 8px 12px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.mega-menu-list a:hover {
    background-color: #e8f0fe;
    color: var(--primary-color);
    transform: translateX(5px);
}

/* ==================== 모바일 네비게이션 ==================== */
@media (max-width: 968px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }

    /* 모바일 토글 버튼 표시 */
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    /* 토글 버튼 활성화 상태 */
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

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

    /* 모바일 메뉴 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 80px 0 0 0;
        gap: 0;
        overflow-y: auto;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        transition: right 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        display: flex;
    }

    .nav-menu.active {
        right: 0;
    }

    /* 모바일 메뉴 아이템 */
    .nav-menu > li {
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-menu > li.mobile-menu-footer {
        border-bottom: none;
        list-style: none;
    }

    .nav-menu > li > a {
        display: block;
        padding: 1rem 2rem;
        color: #333 !important;
        font-size: 1.1rem;
    }

    .nav-menu > li > a:hover {
        background: #e8f0fe;
    }

    /* 드롭다운 메뉴 모바일 스타일 */
    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border-radius: 0;
        padding: 0;
        margin: 0;
        background: #f9f9f9;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .has-dropdown.active .dropdown-menu {
        max-height: 1000px;
    }

    .dropdown-menu a {
        padding: 0.875rem 3rem;
        font-size: 0.95rem;
        border-left: 3px solid transparent;
    }

    .dropdown-menu a:hover {
        border-left-color: var(--primary-color);
        background: white;
    }

    /* 메가메뉴 모바일 스타일 */
    .dropdown-menu.mega-menu {
        flex-direction: column;
        min-width: 100%;
        padding: 0;
        gap: 0;
    }

    .mega-menu-column {
        padding: 1rem 2rem;
        border-bottom: 1px solid #e0e0e0;
    }

    .mega-menu-column:last-child {
        border-bottom: none;
    }

    .mega-menu-title {
        font-size: 0.85rem;
        margin-bottom: 10px;
        padding-bottom: 8px;
    }

    .mega-menu-list a {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    /* 드롭다운 화살표 모바일 */
    .has-dropdown > a {
        position: relative;
        padding-right: 3rem;
    }

    .has-dropdown > a:after {
        position: absolute;
        right: 2rem;
        transition: transform 0.3s ease;
    }

    .has-dropdown.active > a:after {
        transform: rotate(180deg);
    }

    /* 모바일 메뉴 오버레이 */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* 스크롤된 상태에서도 메뉴 색상 유지 */
    .nav.scrolled .nav-menu > li > a {
        color: #333 !important;
    }

    /* 모바일 메뉴 하단 연락처 영역 */
    .mobile-menu-footer {
        margin-top: auto;
        padding: 1.5rem 2rem;
        border-top: 1px solid #f0f0f0;
        flex-shrink: 0;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .mobile-contact-phone {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        padding: 0.875rem 1.25rem;
        background: transparent;
        color: #333;
        text-decoration: none;
        border-radius: 12px;
        font-size: 1.25rem;
        font-weight: 700;
        transition: all 0.3s ease;
        border: 2px solid var(--primary-color);
    }

    .mobile-contact-phone:hover {
        background: #e8f0fe;
    }

    .mobile-contact-phone i {
        font-size: 1.5rem;
        color: var(--primary-color);
        animation: phoneRing 2s ease-in-out infinite;
    }

    @keyframes phoneRing {
        0%, 100% { transform: rotate(0deg); }
        10%, 30% { transform: rotate(-10deg); }
        20%, 40% { transform: rotate(10deg); }
        50% { transform: rotate(0deg); }
    }
}

/* 작은 모바일 (480px 이하) */
@media (max-width: 480px) {
    .nav-container {
        padding: 0.875rem 1rem;
    }

    .nav-logo img {
        height: 32px;
    }

    .nav-menu {
        width: 85%;
        max-width: 300px;
        padding: 70px 0 2rem 0;
    }

    .nav-menu > li > a {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .dropdown-menu a {
        padding: 0.75rem 2.5rem;
        font-size: 0.9rem;
    }

    .mega-menu-column {
        padding: 0.875rem 1.5rem;
    }

    .mega-menu-list a {
        padding: 0.625rem 0.875rem;
        font-size: 0.875rem;
    }
}