/* 헤더 스타일 */
.site-header {
    background-color: var(--color-header-bg);
    color: var(--color-header-text);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 4px 16px rgba(0, 0, 0, 0.25);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

/* 로고 */
.header-logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-header-text);
    letter-spacing: -0.5px;
}

.header-logo a:hover {
    color: var(--color-primary);
}

/* 네비게이션 */
.header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-list {
    display: flex;
    gap: 4px;
}

/* 네비게이션 아이템 */
.nav-item {
    position: relative;
}

.nav-item > a {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    color: var(--color-header-text);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 6px;
    transition: background-color 0.2s;
    white-space: nowrap;
}

.nav-item > a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 드롭다운 화살표 */
.nav-item > a::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 6px;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: transform 0.2s;
}

/* 드롭다운 메뉴 */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background-color: var(--color-white);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    z-index: 200;
}

.nav-item:hover > .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

.nav-dropdown a {
    display: block;
    padding: 10px 20px;
    color: var(--color-text);
    font-size: 0.875rem;
    transition: background-color 0.15s;
}

.nav-dropdown a:hover {
    background-color: var(--color-body-bg);
    color: var(--color-primary);
}

/* 언어 선택 */
.lang-selector {
    position: relative;
    margin-left: 12px;
}

.lang-current {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    color: var(--color-header-text);
    font-size: 0.8125rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.lang-current:hover {
    border-color: rgba(255, 255, 255, 0.6);
}

.lang-current::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 3px solid transparent;
    border-right: 3px solid transparent;
    border-top: 3px solid currentColor;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    min-width: 120px;
    background-color: var(--color-white);
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    padding: 4px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    z-index: 300;
}

.lang-selector:hover .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown button {
    display: block;
    width: 100%;
    padding: 8px 16px;
    text-align: left;
    color: var(--color-text);
    font-size: 0.8125rem;
    transition: background-color 0.15s;
}

.lang-dropdown button:hover {
    background-color: var(--color-body-bg);
}

.lang-dropdown button.active {
    color: var(--color-primary);
    font-weight: 600;
}

/* 햄버거 메뉴 (모바일) */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-header-text);
    border-radius: 1px;
    transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 서브 네비게이션 바 */
.sub-nav {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.sub-nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.sub-nav-item {
    display: inline-flex;
    align-items: center;
    padding: 12px 16px;
    font-size: 0.875rem;
    color: var(--color-text-light);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.sub-nav-item:hover {
    color: var(--color-primary);
}

.sub-nav-item.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .header-nav {
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-header-bg);
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        gap: 8px;
        transform: translateX(100%);
        transition: transform 0.3s;
        overflow-y: auto;
    }

    .header-nav.open {
        transform: translateX(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 4px;
    }

    .nav-item > a {
        padding: 12px 16px;
    }

    /* 모바일에서 드롭다운은 항상 표시 */
    .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background-color: rgba(255, 255, 255, 0.05);
        box-shadow: none;
        border-radius: 0;
        padding: 0 0 0 16px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s;
    }

    .nav-item.mobile-open > .nav-dropdown {
        max-height: 500px;
    }

    .nav-dropdown a {
        color: var(--color-header-text);
        padding: 10px 16px;
    }

    .nav-dropdown a:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--color-primary);
    }

    .lang-selector {
        margin-left: 0;
        margin-top: 16px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 16px;
    }

    .lang-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background-color: transparent;
        box-shadow: none;
        padding: 8px 0;
        display: none;
    }

    .lang-selector:hover .lang-dropdown,
    .lang-selector.mobile-open .lang-dropdown {
        display: block;
    }

    .lang-dropdown button {
        color: var(--color-header-text);
    }

    .lang-dropdown button:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }
}