/* =====================================================
   SML Biopharm - Header Styles
   ===================================================== */

/* Header Container */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--s-white-alpha-98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    transition: all var(--s-transition-normal);
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    box-shadow: var(--s-shadow-sm);
    border-bottom-color: var(--s-border-light);
}

.site-header.transparent {
    background-color: transparent;
    backdrop-filter: none;
}

/* Transparent Header - White Text */
.site-header.transparent .logo-text {
    color: var(--s-text-white);
}

.site-header.transparent .nav-menu a {
    color: var(--s-white-alpha-90);
}

.site-header.transparent .nav-menu a:hover,
.site-header.transparent .nav-menu a.active {
    /* color: var(--s-text-white); */
}

.site-header.transparent .nav-menu a::after {
    background-color: var(--s-color-accent);
}

.site-header.transparent .lang-switcher {
    border-left-color: var(--s-white-alpha-20);
}

.site-header.transparent .lang-switcher a {
    color: var(--s-white-alpha-60);
}

.site-header.transparent .lang-switcher a:hover,
.site-header.transparent .lang-switcher a.active {
    color: var(--s-text-white);
}

.site-header.transparent .lang-switcher .divider {
    color: var(--s-white-alpha-30);
}

.site-header.transparent .mobile-menu-toggle span {
    background-color: var(--s-text-white);
}

/* Transparent Header - Floating Navigation Bar Style */
.site-header.transparent .main-nav {
    background-image: url('/images/menu_bg.jpg');
    background-size: contain;
    background-position: center;
    background-attachment: fixed;
    padding: var(--spacing-sm) var(--spacing-2xl);
    border-radius: var(--s-radius-full);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Scrolled - Reset to default colors */
.site-header.transparent.scrolled {
    background-color: var(--s-white-alpha-98);
    backdrop-filter: blur(10px);
}

.site-header.transparent.scrolled .logo-text {
    color: var(--s-color-primary-dark);
}

.site-header.transparent.scrolled .nav-menu a {
    color: var(--s-text-primary);
}

.site-header.transparent.scrolled .nav-menu a:hover,
.site-header.transparent.scrolled .nav-menu a.active {
    color: var(--s-color-primary);
}

.site-header.transparent.scrolled .nav-menu a::after {
    background-color: var(--s-color-primary);
}

.site-header.transparent.scrolled .lang-switcher {
    border-left-color: var(--s-border-color);
}

.site-header.transparent.scrolled .lang-switcher a {
    color: var(--s-text-muted);
}

.site-header.transparent.scrolled .lang-switcher a:hover,
.site-header.transparent.scrolled .lang-switcher a.active {
    color: var(--s-color-primary);
}

.site-header.transparent.scrolled .lang-switcher .divider {
    color: var(--s-border-color);
}

.site-header.transparent.scrolled .mobile-menu-toggle span {
    background-color: var(--s-text-primary);
}

/* Transparent Header Scrolled - Reset floating style */
.site-header.transparent.scrolled .main-nav {
    background: none;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
}

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

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.header-logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.header-logo img {
    height: 56px;
    width: auto;
}

.header-logo .logo-text {
    font-size: var(--s-font-size-lg);
    font-weight: var(--s-font-weight-bold);
    color: var(--s-color-primary-dark);
    margin-left: var(--spacing-sm);
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-3xl);
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    display: flex;
    align-items: center;
    font-size: var(--s-font-size-base);
    font-weight: var(--s-font-weight-medium);
    color: var(--s-text-primary);
    text-decoration: none;
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: color var(--s-transition-fast);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--s-color-primary);
    transition: width var(--s-transition-normal);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--s-color-primary);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-menu a.active::after {
    width: 0;
}

/* Dropdown Menu (2-Level Navigation) */
.nav-menu li.has-dropdown {
    position: relative;
}

/* hover 시 z-index를 높여서 드롭다운이 다른 형제 메뉴 위에 표시되도록 함 */
.nav-menu li.has-dropdown:hover {
    z-index: 10;
}

/* 드롭다운 메뉴와의 간격을 메우기 위한 가상 요소 */
.nav-menu li.has-dropdown::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 15px;
    /* 메뉴와 드롭다운 사이 간격 커버 */
    background: transparent;
}

.nav-menu .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu .dropdown-arrow {
    transition: transform var(--s-transition-fast);
    flex-shrink: 0;
}

.nav-menu li.has-dropdown:hover .dropdown-arrow,
.nav-menu li.has-dropdown.active .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: block;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 200px;
    background-color: var(--s-bg-white);
    border-radius: var(--s-radius-md);
    box-shadow: var(--s-shadow-lg);
    padding: var(--spacing-sm) 0;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--s-transition-fast);
    z-index: calc(var(--z-fixed) + 10);
    border: 1px solid var(--s-border-light);
}

.nav-menu li.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--s-font-size-sm);
    font-weight: var(--s-font-weight-normal);
    color: var(--s-text-primary);
    white-space: nowrap;
    transition: all var(--s-transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--s-bg-light);
    color: var(--s-color-primary);
}

.dropdown-menu a::after {
    display: none;
}

/* Dropdown toggle에서 underline 제거 (드롭다운 호버 방해 방지) */
.nav-menu .dropdown-toggle::after {
    display: none;
}

/* Transparent Header Dropdown */
.site-header.transparent .dropdown-menu {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.site-header.transparent .dropdown-menu a {
    color: var(--s-text-primary);
}

.site-header.transparent .dropdown-menu a:hover {
    background-color: var(--s-bg-light);
    color: var(--s-color-primary);
}

/* Transparent Header - Scrolled Dropdown */
.site-header.transparent.scrolled .dropdown-menu {
    background-color: var(--s-bg-white);
}

.site-header.transparent.scrolled .dropdown-menu a {
    color: var(--s-text-primary);
}

.site-header.transparent.scrolled .dropdown-menu a:hover {
    background-color: var(--s-bg-light);
    color: var(--s-color-primary);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    margin-left: var(--spacing-xl);
    padding-left: var(--spacing-xl);
}

.lang-switcher a {
    font-size: var(--s-font-size-sm);
    font-weight: var(--s-font-weight-medium);
    color: var(--s-text-muted);
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: color var(--s-transition-fast);
}

.lang-switcher a:hover,
.lang-switcher a.active {
    color: var(--s-color-primary);
}

.lang-switcher .divider {
    color: var(--s-border-color);
    margin: 0 var(--spacing-xs);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: calc(var(--z-fixed) + 1);
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--s-text-primary);
    transition: all var(--s-transition-normal);
    position: absolute;
}

.mobile-menu-toggle span:nth-child(1) {
    transform: translateY(-7px);
}

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

.mobile-menu-toggle span:nth-child(3) {
    transform: translateY(7px);
}

/* Mobile Menu Toggle Active State */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(0) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(0) rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--s-bg-white);
    z-index: var(--z-fixed);
    padding-top: var(--header-height);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--s-transition-normal), visibility var(--s-transition-normal);
}

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

.mobile-nav-inner {
    padding: var(--spacing-xl) var(--container-padding-mobile);
    padding-top: 80px;
}

/* Mobile Nav Close Button */
.mobile-nav-close {
    position: absolute;
    top: 20px;
    right: var(--container-padding-mobile);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--s-border-color);
    border-radius: 50%;
    cursor: pointer;
    color: var(--s-text-primary);
    transition: all var(--s-transition-fast);
    z-index: 10;
}

.mobile-nav-close:hover {
    background-color: var(--s-bg-light);
    border-color: var(--s-color-primary);
    color: var(--s-color-primary);
}

.mobile-nav-close svg {
    width: 20px;
    height: 20px;
}

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

.mobile-nav-menu li {
    border-bottom: 1px solid var(--s-border-light);
}

.mobile-nav-menu a {
    display: block;
    font-size: var(--s-font-size-lg);
    font-weight: var(--s-font-weight-medium);
    color: var(--s-text-primary);
    padding: var(--spacing-lg) 0;
    text-decoration: none;
    transition: color var(--s-transition-fast);
}

.mobile-nav-menu a:hover,
.mobile-nav-menu a.active {
    color: var(--s-color-primary);
}

/* Mobile Submenu (2-Level Navigation) */
.mobile-nav-menu li.has-submenu {
    position: relative;
}

.mobile-submenu-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    font-size: var(--s-font-size-lg);
    font-weight: var(--s-font-weight-medium);
    color: var(--s-text-primary);
    padding: var(--spacing-lg) 0;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color var(--s-transition-fast);
}

.mobile-submenu-toggle:hover {
    color: var(--s-color-primary);
}

.mobile-submenu-toggle .submenu-arrow {
    transition: transform var(--s-transition-fast);
    flex-shrink: 0;
}

.mobile-nav-menu li.has-submenu.active .submenu-arrow {
    transform: rotate(180deg);
}

.mobile-submenu {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--s-transition-normal);
}

.mobile-nav-menu li.has-submenu.active .mobile-submenu {
    max-height: 500px;
}

.mobile-submenu li {
    border-bottom: none;
    border-top: 1px solid var(--s-border-light);
}

.mobile-submenu li:last-child {
    margin-bottom: var(--spacing-md);
}

.mobile-submenu a {
    display: block;
    font-size: var(--s-font-size-base);
    font-weight: var(--s-font-weight-normal);
    color: var(--s-text-secondary);
    padding: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
    text-decoration: none;
    transition: color var(--s-transition-fast);
}

.mobile-submenu a:hover,
.mobile-submenu a.active {
    color: var(--s-color-primary);
}

.mobile-lang-switcher {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--s-border-color);
}

.mobile-lang-switcher a {
    font-size: var(--s-font-size-base);
    font-weight: var(--s-font-weight-medium);
    color: var(--s-text-muted);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--s-border-color);
    border-radius: var(--s-radius-md);
    transition: all var(--s-transition-fast);
}

.mobile-lang-switcher a:hover,
.mobile-lang-switcher a.active {
    color: var(--s-color-primary);
    border-color: var(--s-color-primary);
    background-color: var(--s-color-primary-pale);
}

/* Body scroll lock when mobile menu is open */
body.menu-open {
    overflow: hidden;
}

/* =====================================================
   Responsive Styles
   ===================================================== */
@media (max-width: 991px) {

    .main-nav,
    .lang-switcher {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-nav {
        display: block;
    }

    .header-inner {
        padding: 0 var(--container-padding-mobile);
    }
}

@media (max-width: 767px) {
    .site-header {
        height: var(--header-height-mobile);
    }

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

    .mobile-nav {
        padding-top: var(--header-height-mobile);
    }
}