/* 공통 상단 내비 — index(다크 히어로) + 서브페이지(nav-sub: 밝은 히어로) */

html {
    scrollbar-gutter: stable;
}

/* 한 줄 고정: 줄바꿈 시 특정 긴 라벨만 흔들리는 현상 방지 */
.site-nav__links {
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
    contain: layout style;
}
/* 모든 페이지에서 상단 메뉴 간격·폰트 기준 통일 (index / 서브 간 미세 이동 방지) */
#site-nav .site-nav__links {
    font-size: 0.8125rem;
    column-gap: 0.75rem;
    row-gap: 0;
}
@media (min-width: 640px) {
    #site-nav .site-nav__links {
        column-gap: 1.25rem;
    }
}
@media (min-width: 768px) {
    #site-nav .site-nav__links {
        column-gap: 1.5rem;
    }
}
.site-nav__links::-webkit-scrollbar {
    display: none;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    flex: 0 0 auto;
    flex-shrink: 0;
    letter-spacing: 0.02em;
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.25;
    color: rgb(71 85 105);
    border-radius: 0.375rem;
    padding: 0.35rem 0.6rem;
    border-width: 1px;
    border-style: solid;
    border-color: transparent;
    background-color: transparent;
    background-clip: padding-box;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
    word-break: keep-all;
    font-variant-ligatures: none;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}
.nav-link:hover {
    color: rgb(15 23 42);
}
/* 클릭 순간 transition 끄기 → 미세 점프 완화 */
#site-nav .nav-link:active {
    transform: none;
    padding: 0.35rem 0.6rem;
    border-width: 1px;
    letter-spacing: 0.02em;
    transition: none;
}
#site-nav .nav-link:focus {
    outline: none;
}
#site-nav .nav-link:focus-visible {
    outline: 2px solid rgba(15, 23, 42, 0.32);
    outline-offset: 0;
}

#site-nav {
    transition:
        background-color 0.5s cubic-bezier(0.22, 1, 0.36, 1),
        border-color 0.45s ease,
        box-shadow 0.5s cubic-bezier(0.22, 1, 0.36, 1),
        backdrop-filter 0.45s ease,
        -webkit-backdrop-filter 0.45s ease;
}

#site-nav:not(.nav-is-solid) {
    background-color: rgba(255, 255, 255, 0.07);
    border-bottom-color: rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(18px) saturate(1.35);
    -webkit-backdrop-filter: blur(18px) saturate(1.35);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06) inset;
}

#site-nav.nav-is-solid {
    background-color: rgba(255, 255, 255, 0.97);
    border-bottom-color: rgba(226, 232, 240, 0.95);
    backdrop-filter: blur(20px) saturate(1.2);
    -webkit-backdrop-filter: blur(20px) saturate(1.2);
    box-shadow: 0 12px 40px -18px rgba(15, 23, 42, 0.12);
}

#site-nav:not(.nav-is-solid) .nav-link {
    color: rgba(248, 250, 252, 0.9);
}
#site-nav:not(.nav-is-solid) .nav-link:hover:not(.nav-link-active) {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.08);
}
#site-nav:not(.nav-is-solid) .nav-link-active {
    background-color: rgba(248, 250, 252, 0.92);
    color: rgb(15 23 42) !important;
}
#site-nav:not(.nav-is-solid) .nav-link-active:hover {
    color: rgb(15 23 42) !important;
    background-color: rgb(241 245 249);
}
#site-nav:not(.nav-is-solid) .nav-link:active:not(.nav-link-active) {
    background-color: rgba(255, 255, 255, 0.08);
    color: #fff;
}
#site-nav:not(.nav-is-solid) .nav-link.nav-link-active:active {
    background-color: rgba(248, 250, 252, 0.92);
    color: rgb(15 23 42) !important;
}
#site-nav:not(.nav-is-solid) .nav-logo {
    filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.45)) drop-shadow(0 0 1px rgba(0, 0, 0, 0.2));
}
#site-nav.nav-is-solid .nav-logo {
    filter: none;
}

#site-nav.nav-is-solid .nav-link:hover:not(.nav-link-active) {
    background-color: rgba(15, 23, 42, 0.06);
}
#site-nav.nav-is-solid .nav-link-active {
    background-color: rgb(241 245 249);
    color: rgb(15 23 42) !important;
}
#site-nav.nav-is-solid .nav-link-active:hover {
    background-color: rgb(226 232 240);
    color: rgb(15 23 42) !important;
}
#site-nav.nav-is-solid .nav-link:active:not(.nav-link-active) {
    background-color: rgba(15, 23, 42, 0.06);
    color: rgb(15 23 42);
}
#site-nav.nav-is-solid .nav-link.nav-link-active:active {
    background-color: rgb(241 245 249);
    color: rgb(15 23 42) !important;
}

/* 밝은 배경 페이지: 항상 메인 스크롤 후와 동일한 솔리드 바 */
html.nav-sub #site-nav {
    background-color: rgba(255, 255, 255, 0.97) !important;
    border-bottom-color: rgba(226, 232, 240, 0.95) !important;
    backdrop-filter: blur(20px) saturate(1.2) !important;
    -webkit-backdrop-filter: blur(20px) saturate(1.2) !important;
    box-shadow: 0 12px 40px -18px rgba(15, 23, 42, 0.12) !important;
}
html.nav-sub #site-nav .nav-link {
    color: rgb(71 85 105) !important;
}
html.nav-sub #site-nav .nav-link:hover:not(.nav-link-active) {
    color: rgb(15 23 42) !important;
    background-color: rgba(15, 23, 42, 0.06) !important;
}
html.nav-sub #site-nav .nav-link-active {
    background-color: rgb(241 245 249) !important;
    color: rgb(15 23 42) !important;
}
html.nav-sub #site-nav .nav-link-active:hover {
    background-color: rgb(226 232 240) !important;
    color: rgb(15 23 42) !important;
}
html.nav-sub #site-nav .nav-link:active:not(.nav-link-active) {
    background-color: rgba(15, 23, 42, 0.06) !important;
    color: rgb(15 23 42) !important;
}
html.nav-sub #site-nav .nav-link.nav-link-active:active {
    background-color: rgb(241 245 249) !important;
    color: rgb(15 23 42) !important;
}
html.nav-sub #site-nav .nav-logo {
    filter: none !important;
}

/* 메인(index): 히어로 최상단에서도 밝은 바·진한 글자(서브페이지와 동일 톤) */
html.nav-home-light #site-nav:not(.nav-is-solid),
html.nav-home-light #site-nav.nav-is-solid {
    background-color: rgba(255, 255, 255, 0.97) !important;
    border-bottom-color: rgba(226, 232, 240, 0.95) !important;
    backdrop-filter: blur(20px) saturate(1.2) !important;
    -webkit-backdrop-filter: blur(20px) saturate(1.2) !important;
    box-shadow: 0 12px 40px -18px rgba(15, 23, 42, 0.12) !important;
}
html.nav-home-light #site-nav:not(.nav-is-solid) .nav-link,
html.nav-home-light #site-nav.nav-is-solid .nav-link {
    color: rgb(71 85 105) !important;
}
html.nav-home-light #site-nav:not(.nav-is-solid) .nav-link:hover:not(.nav-link-active),
html.nav-home-light #site-nav.nav-is-solid .nav-link:hover:not(.nav-link-active) {
    color: rgb(15 23 42) !important;
    background-color: rgba(15, 23, 42, 0.06) !important;
}
html.nav-home-light #site-nav:not(.nav-is-solid) .nav-link-active,
html.nav-home-light #site-nav.nav-is-solid .nav-link-active {
    background-color: rgb(241 245 249) !important;
    color: rgb(15 23 42) !important;
}
html.nav-home-light #site-nav:not(.nav-is-solid) .nav-link-active:hover,
html.nav-home-light #site-nav.nav-is-solid .nav-link-active:hover {
    color: rgb(15 23 42) !important;
    background-color: rgb(226 232 240) !important;
}
html.nav-home-light #site-nav .nav-link:active:not(.nav-link-active) {
    background-color: rgba(15, 23, 42, 0.06) !important;
    color: rgb(15 23 42) !important;
}
html.nav-home-light #site-nav .nav-link.nav-link-active:active {
    background-color: rgb(241 245 249) !important;
    color: rgb(15 23 42) !important;
}
html.nav-home-light #site-nav:not(.nav-is-solid) .nav-logo,
html.nav-home-light #site-nav.nav-is-solid .nav-logo {
    filter: none !important;
}

html.cert-focus #site-nav {
    background-color: rgba(255, 255, 255, 0.98) !important;
    border-bottom-color: rgba(226, 232, 240, 0.95) !important;
    backdrop-filter: blur(16px) saturate(1.2) !important;
    -webkit-backdrop-filter: blur(16px) saturate(1.2) !important;
    box-shadow: 0 8px 30px -16px rgba(15, 23, 42, 0.1) !important;
}
html.cert-focus #site-nav .nav-link {
    color: rgb(71 85 105) !important;
}
html.cert-focus #site-nav .nav-link:hover:not(.nav-link-active) {
    color: rgb(15 23 42) !important;
    background-color: rgba(15, 23, 42, 0.06) !important;
}
html.cert-focus #site-nav .nav-link-active {
    background-color: rgb(241 245 249) !important;
    color: rgb(15 23 42) !important;
}
html.cert-focus #site-nav .nav-link-active:hover {
    background-color: rgb(226 232 240) !important;
    color: rgb(15 23 42) !important;
}
html.cert-focus #site-nav .nav-link:active:not(.nav-link-active) {
    background-color: rgba(15, 23, 42, 0.06) !important;
    color: rgb(15 23 42) !important;
}
html.cert-focus #site-nav .nav-link.nav-link-active:active {
    background-color: rgb(241 245 249) !important;
    color: rgb(15 23 42) !important;
}
html.cert-focus #site-nav .nav-logo {
    filter: none !important;
}