/**
 * @파일명 css/_header.css
 * @제작사 ZZAN Studio
 * @설명 상단 헤더 영역(GNB, 로고, 모바일 메뉴) 스타일
 */

/* [1] 헤더 메인 컨테이너 */
header#header {
    width: 100%;
    height: 80px;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    transition: height 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.header-inner {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo a {
    display: flex;
    align-items: center;
    height: 100%;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary-red);
    letter-spacing: -0.05em;
}

.logo img {
    max-height: 30px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* [2] 데스크탑 GNB 네비게이션 */
.gnb {
    margin: 0 auto;
}

.gnb ul {
    display: flex;
    gap: 40px;
}

.gnb ul li a {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-black);
    position: relative;
    padding: 10px 0;
}

.gnb ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-red);
    transition: 0.3s;
}

.gnb ul li a:hover {
    color: var(--primary-red);
}

.gnb ul li a:hover::after {
    width: 100%;
}

.gnb ul li a .arrow-icon {
    display: none; /* PC에서는 숨김 */
}

/* [2-1] 2차 서브 메뉴 스타일 (PC용) */
.gnb ul li {
    position: relative;
}

.gnb ul li .sub-menu {
    position: absolute;
    top: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background-color: var(--bg-white);
    min-width: 180px;
    padding: 15px 0;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    border-radius: 12px;
    display: block;
    visibility: hidden;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    z-index: 10;
}

.gnb ul li .sub-menu::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 0;
    width: 100%;
    height: 25px;
}

.gnb ul li:hover .sub-menu {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.gnb ul li .sub-menu li {
    display: block;
    width: 100%;
}

.gnb ul li .sub-menu li a {
    display: block !important;
    padding: 10px 25px !important;
    font-size: 0.95rem !important;
    font-weight: 500 !important;
    color: var(--text-black) !important;
    background-color: transparent !important;
    white-space: nowrap;
    transition: all 0.3s;
}

.gnb ul li .sub-menu li a::after {
    display: none;
}

.gnb ul li .sub-menu li a:hover {
    background-color: #f8f9fa !important;
    color: var(--primary-red) !important;
    padding-left: 30px !important;
}

.gnb ul li .sub-menu li.active a {
    color: var(--primary-red) !important;
    font-weight: 700 !important;
}

/* [2-2] 메뉴 활성화(Active) 스타일 */
.gnb ul li.active > a {
    color: var(--primary-red);
    font-weight: 800;
}

.gnb ul li.active > a::after {
    width: 100%;
}

/* [1-1] 스크롤 시 헤더 변화 스타일 */
header#header.scrolled {
    height: 70px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

/* [3] 모바일 메뉴 토글(햄버거) 아이콘 */
.btn-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.icon-bar {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-black);
    transition: 0.3s;
}

/* [유틸리티] SEO용 숨김 텍스트 처리 */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* [1-2] 헤더 우측 유틸리티 버튼 */
.header-utils {
    display: flex;
    gap: 15px;
}

.btn-consult {
    background-color: var(--primary-red);
    color: var(--bg-white) !important;
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.9rem;
}

.btn-consult:hover {
    background-color: #b11a00;
}

/* [4] 반응형 스타일 (태블릿 및 모바일 - 1024px 이하) */
@media (max-width: 1024px) {
    header#header { height: 60px; transition: 0.3s; }
    .gnb {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: #fff;
        z-index: 999;
        display: block;
        transform: translateX(100%);
        transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 20px 0;
        overflow-y: auto;
    }
    
    .header-inner { position: relative; }

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

    header.menu-opened .gnb {
        transform: translateX(0);
    }

    .gnb ul {
        flex-direction: column;
        gap: 0;
    }

    .gnb ul li {
        border-bottom: 1px solid #eee;
        position: relative;
    }

    .gnb ul li a {
        display: flex !important;
        align-items: center;
        justify-content: space-between;
        padding: 18px 20px !important;
        font-size: 1.1rem !important;
        color: var(--text-black) !important;
        background-color: #fff !important;
        width: 100% !important;
        height: auto !important;
        position: relative !important;
        top: auto !important;
        left: auto !important;
        transform: none !important;
        opacity: 1 !important;
        visibility: visible !important;
    }

    .gnb ul li a .arrow-icon {
        display: block;
        width: 16px;
        height: 16px;
        transition: transform 0.3s ease;
    }

    /* 클릭 시 (.opened 클래스 부여 시) 화살표 애니메이션 */
    .gnb ul li.opened > a .arrow-icon {
        transform: rotate(180deg);
    }

    .gnb ul li a::after { display: none; }

    /* [4-1] 모바일 서브 메뉴 스타일 리셋 및 재정의 */
    .gnb ul li .sub-menu {
        position: static !important;
        transform: none !important;
        visibility: visible !important;
        opacity: 1 !important;
        box-shadow: none !important;
        background-color: #fcfcfc !important;
        padding: 0 !important;
        min-width: 100% !important;
        max-height: 0 !important;
        overflow: hidden !important;
        transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1) !important;
        border-radius: 0 !important;
    }

    .gnb ul li .sub-menu::before { display: none !important; }

    .gnb ul li.opened .sub-menu {
        max-height: 800px !important;
    }

    .gnb ul li .sub-menu li {
        border-bottom: none !important;
        border-top: 1px solid #f0f0f0 !important;
    }

    .gnb ul li .sub-menu li a {
        padding: 15px 35px !important;
        font-size: 1rem !important;
        color: #555 !important;
        background-color: transparent !important;
        display: block !important;
    }

    .gnb ul li .sub-menu li a:hover,
    .gnb ul li .sub-menu li.active a {
        color: var(--primary-red) !important;
        background-color: #f5f5f5 !important;
    }

    .gnb ul li .sub-menu li a:hover {
        padding-left: 40px !important;
    }

    .header-utils { display: none; }
    .btn-menu-toggle { display: flex; z-index: 1001; }

    /* [4-2] 모바일 메뉴 오픈 시 햄버거 아이콘 애니메이션 */
    header.menu-opened .icon-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    header.menu-opened .icon-bar:nth-child(2) {
        opacity: 0;
    }
    header.menu-opened .icon-bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    body.menu-opened {
        overflow: hidden;
    }
}