/* ==========================================================================
   Components — Header / Navigation / Footer / Page Shell / Buttons
   ========================================================================== */

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.2px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.site-logo__img {
  height: 32px;
  width: auto;
  display: block;
}

@media (max-width: 768px) {
  .site-logo__img {
    height: 26px;
  }
}

/* ---------- Desktop Navigation ---------- */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}

.desktop-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.desktop-nav__item {
  position: relative;
}

.desktop-nav__link {
  /* 1차 메뉴 공통 스타일 — <a>와 <button> 모두 동일한 텍스트 메뉴로 보이도록
     브라우저 기본 버튼 외형(테두리/배경/appearance)을 명시적으로 리셋한다.
     드롭다운이 있다는 이유로 별도의 회색 border box 버튼처럼 보이게 하지 않는다. */
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 14px;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text-primary);
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  box-shadow: none;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  line-height: 1.2;
}

.desktop-nav__link:hover,
.desktop-nav__link:focus-visible {
  color: var(--color-primary);
  background: var(--color-section-bg);
}

.desktop-nav__caret {
  font-size: 10px;
  color: var(--color-text-secondary);
}

.desktop-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(11, 37, 69, 0.08);
  padding: 8px;
  margin: 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.desktop-nav__item:hover .desktop-nav__dropdown,
.desktop-nav__item:focus-within .desktop-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.desktop-nav__dropdown-link {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text-primary);
}

.desktop-nav__dropdown-link:hover,
.desktop-nav__dropdown-link:focus-visible {
  background: var(--color-section-bg);
  color: var(--color-primary);
}

.header-cta {
  flex-shrink: 0;
}

@media (max-width: 1024px) {
  .desktop-nav,
  .header-cta {
    display: none;
  }
}

/* ---------- Mobile Header Controls ---------- */
.mobile-header-controls {
  display: none;
  align-items: center;
  gap: 8px;
}

@media (max-width: 1024px) {
  .mobile-header-controls {
    display: flex;
  }
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-background);
  color: var(--color-primary);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  text-decoration: none;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* 카카오톡 등 URL 미확보 상태의 자리표시자 — 클릭 불가, 낮은 대비로 표시 */
.icon-btn[data-kakao-placeholder] {
  cursor: default;
  color: var(--color-text-secondary);
}

/* ---------- Mobile Nav Drawer ---------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--color-background);
  display: none;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 24px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__list {
  list-style: none;
  margin: 0;
  padding: 8px 16px 24px;
  flex: 1;
}

.mobile-nav__item {
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link,
.mobile-nav__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 4px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  min-height: 44px;
}

.mobile-nav__submenu {
  list-style: none;
  margin: 0 0 12px;
  padding: 0 0 0 16px;
  display: none;
}

.mobile-nav__submenu.is-open {
  display: block;
}

.mobile-nav__sublink {
  display: block;
  padding: 12px 4px;
  font-size: 15px;
  color: var(--color-text-secondary);
  min-height: 44px;
}

.mobile-nav__footer {
  padding: 16px 24px 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav__quicklinks {
  display: flex;
  gap: 12px;
}

.mobile-nav__quicklinks .icon-btn {
  flex: 1;
  width: auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: var(--fs-button);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 44px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-secondary);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--color-primary);
}

.btn-block {
  width: 100%;
}

/* ---------- Page Shell (Hero/Title area) ---------- */
.page-hero {
  background: var(--color-section-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}

.page-hero__eyebrow {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 8px;
}

.page-hero__title {
  font-size: var(--fs-h1);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

/* 페이지 Hero 보조 설명 + CTA — Page Shell 공통 (FEMS 이후 다른 페이지에서도 재사용) */
.page-hero__desc {
  font-size: var(--fs-body);
  color: var(--color-text-secondary);
  margin: 14px 0 0;
  max-width: 640px;
  line-height: 1.6;
}

.page-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

@media (max-width: 768px) {
  .page-hero__cta {
    flex-direction: column;
  }
  .page-hero__cta .btn {
    width: 100%;
  }
}

.page-shell-main {
  padding: 48px 0 80px;
}

.content-pending {
  border: 1px dashed var(--color-border);
  background: #fff;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  padding: 40px 24px;
  text-align: center;
  font-size: var(--fs-body);
}

.content-pending code {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 8px;
  background: var(--color-section-bg);
  border-radius: var(--radius-sm);
  font-size: var(--fs-small);
  color: var(--color-primary);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary);
  color: #E7EBF2;
  padding: 56px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 32px;
  margin-bottom: 32px;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-logo {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-logo__img {
  height: 28px;
  width: auto;
  display: block;
}

.footer-heading {
  font-size: var(--fs-small);
  font-weight: 600;
  color: #AEB9CC;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 14px;
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list a {
  font-size: 14px;
  color: #D6DCE8;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: #fff;
}

.footer-desc {
  font-size: 14px;
  color: #AEB9CC;
  margin: 0;
  line-height: 1.6;
}

.footer-info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: #D6DCE8;
  line-height: 1.6;
}

.footer-info-list a {
  color: #D6DCE8;
}

.footer-info-list a:hover,
.footer-info-list a:focus-visible {
  color: #fff;
}

/* 아직 확정되지 않은 페이지 콘텐츠 표시(HOME 외 Page Shell에서 계속 사용) */
.footer-pending {
  font-size: 13px;
  color: #8E9BB3;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: inline-block;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  font-size: 13px;
  color: #8E9BB3;
}

/* ---------- 404 ---------- */
.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
  padding: 80px 24px;
}

.error-page__code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}