/* 사이트 헤더 컴포넌트 (다른 컴포넌트·레이아웃 스타일 금지) */

/* =========================================================
   사이트 헤더 — sticky 고정 바
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: 56px;
  display: flex;
  align-items: center;
  background-color: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: box-shadow var(--transition-base);
}

/* 스크롤 시 그림자 강화 (JS로 .is-scrolled 클래스 추가) */
.site-header.is-scrolled {
  box-shadow: 0 1px 8px rgba(26, 26, 46, 0.08);
}

@media (min-width: 768px) {
  .site-header {
    height: 64px;
  }
}

/* =========================================================
   헤더 내부 컨테이너
   ========================================================= */
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 16px;
}

@media (min-width: 768px) {
  .site-header__inner {
    padding-inline: 24px;
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    padding-inline: 32px;
  }
}

/* =========================================================
   로고
   ========================================================= */
.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-tight);
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.8;
  text-decoration: none;
}

/* 로고 아이콘 박스 — 28×28 틸 배경 */
.site-logo__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-accent-primary);
  border-radius: var(--radius-sm);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--font-extrabold);
  letter-spacing: var(--tracking-widest);
  flex-shrink: 0;
}

.site-logo__text {
  color: var(--color-text-primary);
}

/* =========================================================
   데스크탑 네비게이션
   ========================================================= */
.site-nav {
  display: none; /* 모바일 기본 숨김 */
  align-items: center;
  gap: 4px;
}

@media (min-width: 768px) {
  .site-nav {
    display: flex;
  }
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-muted);
  text-decoration: none;
}

.site-nav__link.is-active {
  color: var(--color-accent-primary);
  background-color: var(--color-accent-primary-light);
  font-weight: var(--font-semibold);
}

/* =========================================================
   헤더 우측 액션 영역
   ========================================================= */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* =========================================================
   모바일 햄버거 메뉴 버튼 (768px 미만에서만 표시)
   ========================================================= */
.site-header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  cursor: pointer;
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.site-header__hamburger:hover {
  background-color: var(--color-bg-muted);
}

.site-header__hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* 열림 상태 — X 모양 변환 */
.site-header__hamburger[aria-expanded='true'] .site-header__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__hamburger[aria-expanded='true'] .site-header__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.site-header__hamburger[aria-expanded='true'] .site-header__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
  .site-header__hamburger {
    display: none;
  }
}

/* =========================================================
   모바일 드로어 메뉴
   ========================================================= */
.site-nav--mobile {
  display: none;
  position: fixed;
  inset: 56px 0 0 0;
  z-index: 99;
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border-subtle);
  padding: 16px;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}

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

@media (min-width: 768px) {
  .site-nav--mobile {
    display: none !important;
  }
}

.site-nav--mobile .site-nav__link {
  padding: 12px 16px;
  font-size: var(--text-md);
  border-radius: var(--radius-md);
}