/* ==========================================================================
   휴먼아크 공통 레이아웃 (Layout)
   --------------------------------------------------------------------------
   모든 페이지가 공유하는 헤더·푸터·컨테이너·섹션 구조.
   ========================================================================== */


/* ==========================================================================
   1. 컨테이너 (Container) — 가운데 정렬 + 좌우 여백
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-lg);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

.container--sm  { max-width: var(--container-sm); }
.container--md  { max-width: var(--container-md); }
.container--xl  { max-width: var(--container-xl); }
.container--full { max-width: none; }

/* 모바일에서 좌우 여백 줄임 */
@media (max-width: 640px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}


/* ==========================================================================
   2. 섹션 (Section) — 위아래 큰 여백
   ========================================================================== */

.section {
  padding-top: var(--section-pad-y);
  padding-bottom: var(--section-pad-y);
  position: relative;
}

.section--navy {
  background-color: var(--color-navy);
  color: var(--color-text-on-navy);
}

.section--cream {
  background-color: var(--color-cream);
}

.section--cream-deep {
  background-color: var(--color-cream-deep);
}

.section--white {
  background-color: #FFFFFF;
}


/* ==========================================================================
   3. 헤더 (Header) — 사이트 상단 고정
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background-color: rgba(248, 245, 238, 0.85);   /* 크림 배경 + 반투명 */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line-soft);
  transition: background-color var(--duration-normal) var(--ease-out);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: 100%;
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* 로고 영역 */
.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  color: var(--color-navy);
  letter-spacing: var(--ls-wide);
  transition: opacity var(--duration-fast) var(--ease-out);
}

.site-header__logo:hover {
  opacity: 0.8;
  color: var(--color-navy);
}

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.site-header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__logo-text-ko {
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
}

.site-header__logo-text-en {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-style: italic;
  color: var(--color-gold-deep);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

/* 데스크탑 메뉴 */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-navy);
  padding: var(--space-2) 0;
  letter-spacing: 0.02em;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--duration-normal) var(--ease-out);
}

.site-nav__link:hover {
  color: var(--color-gold-deep);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  width: 100%;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold-deep);
}

/* 모바일 메뉴 토글 버튼 */
.site-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--ease-out);
}

.site-header__toggle:hover {
  background-color: var(--color-gold-mist);
}

.site-header__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-navy);
  position: relative;
  transition: all var(--duration-normal) var(--ease-out);
}

.site-header__toggle-bar::before,
.site-header__toggle-bar::after {
  content: '';
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background-color: var(--color-navy);
  transition: all var(--duration-normal) var(--ease-out);
}

.site-header__toggle-bar::before { top: -7px; }
.site-header__toggle-bar::after  { top: 7px; }

/* 모바일 메뉴 열린 상태 — X 모양 */
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar {
  background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

/* 모바일 — 768px 이하 */
@media (max-width: 768px) {
  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-cream);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--duration-normal) var(--ease-out);
  }

  .site-nav[data-open="true"] {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4) var(--space-5);
  }

  .site-nav__link {
    display: block;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-line-soft);
    font-size: var(--fs-base);
  }

  .site-nav__link::after {
    display: none;   /* 모바일에서는 밑줄 표시 안 함 */
  }

  .site-nav__list li:last-child .site-nav__link {
    border-bottom: none;
  }

  .site-header__toggle {
    display: flex;
  }
}


/* ==========================================================================
   4. 푸터 (Footer)
   ========================================================================== */

.site-footer {
  background-color: var(--color-navy-deep);
  color: var(--color-text-on-navy);
  padding-top: var(--space-9);
  padding-bottom: var(--space-6);
  position: relative;
}

/* 푸터 상단 골드 가교 라인 — Arc 모티프 일관성 */
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(80%, 600px);
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-gold) 50%,
    transparent 100%
  );
  opacity: 0.6;
}

.site-footer__inner {
  width: 100%;
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-8);
}

@media (max-width: 960px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 480px) {
  .site-footer__top {
    grid-template-columns: 1fr;
  }
}

/* 푸터 브랜드 영역 */
.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.site-footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-serif);
  color: var(--color-text-on-navy);
}

.site-footer__logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.site-footer__tagline {
  font-family: var(--font-serif);
  font-size: var(--fs-sm);
  color: rgba(248, 245, 238, 0.7);
  line-height: var(--lh-relaxed);
  max-width: 280px;
}

.site-footer__tagline strong {
  color: var(--color-gold);
  font-weight: var(--fw-medium);
}

/* 푸터 컬럼 */
.site-footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__col-title {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: var(--ls-wider);
  color: var(--color-gold);
  margin-bottom: var(--space-2);
}

.site-footer__col a,
.site-footer__col p {
  font-size: var(--fs-sm);
  color: rgba(248, 245, 238, 0.75);
  line-height: var(--lh-snug);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-footer__col a:hover {
  color: var(--color-gold);
}

.site-footer__col-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

/* 외부 링크 표시 ↗ */
.site-footer__col-item--external::after {
  content: '↗';
  font-size: 0.85em;
  color: var(--color-gold);
  opacity: 0.7;
}

/* 푸터 하단 — 저작권·라이선스 */
.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-line-on-navy);
  font-size: var(--fs-xs);
  color: rgba(248, 245, 238, 0.5);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.site-footer__bottom a:hover {
  color: var(--color-gold);
}


/* ==========================================================================
   5. 메인 콘텐츠 영역
   ========================================================================== */

.site-main {
  min-height: calc(100vh - var(--header-height));
}


/* ==========================================================================
   6. 유틸리티 클래스 (Utility Classes)
   ========================================================================== */

.sr-only {
  /* 화면에는 안 보이지만 스크린리더는 읽을 수 있는 텍스트 */
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.flex            { display: flex; }
.flex-col        { flex-direction: column; }
.items-center    { align-items: center; }
.justify-center  { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }