/* =================================================================
   1. 페이지 레이아웃 (Page Layout)
   ================================================================= */

/* 본문 영역 기본 여백 */
.content .inner {
  padding: 0 160px 0 0;
  transition: all 0.2s;
}

/* 데모용 상단 구분선 */
.dev_top_area {
  position: relative;
  margin-bottom: 16px;
}
.dev_top_area:after {
  content: "";
  display: block;
  position: absolute;
  bottom: -32px;
  width: 100%;
  height: 1px;
  background: #000;
}

/* =================================================================
   2. 내비게이터 골격 (Navigator Structure)
   ================================================================= */

/* [1] Wrapper: 화면 우측 고정 (이벤트 통과) */
.navigator-wrap {
  position: fixed;
  left: calc(50% + 580px);
  top: 0;
  bottom: 0;
  width: 320px;
  z-index: 100;
  pointer-events: none; /* 빈 공간 클릭 통과 */
  box-sizing: border-box;
  transition: all 0.2s;
}

/* [2] Area: 배경 및 위치 제어 (이벤트 받음) */
.navigator-area {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  pointer-events: auto; /* 클릭 활성화 */
  will-change: top, bottom; /* 성능 최적화 */
  box-sizing: border-box;

  /* 배경: 상단(회색) -> 하단(투명 그라데이션) */
  background: linear-gradient(
    to bottom,
    #fbfbfb 0%,
    #fbfbfb calc(100% - 60px),
    rgba(251, 251, 251, 0) 100%
  );
}

/* [3] Inner: 내부 콘텐츠 레이아웃 */
.navigator-inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  transition: padding-top 0.3s;
}

/* =================================================================
   3. 브레드크럼 (Breadcrumb)
   ================================================================= */

.navigator-breadcrumb {
  flex: 0 0 auto; /* 높이 고정 */
  margin-bottom: 10px;
  padding: 0 28px 0 28px;
  box-sizing: border-box;

  /* 폰트 스타일 */
  color: #333;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, system-ui,
    Roboto, sans-serif;
  white-space: nowrap;
  overflow: hidden;
}

.navigator-breadcrumb ol {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navigator-breadcrumb .breadcrumb-item {
  font-family: "Pretendard";
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.075px;
  line-height: 1.13;
  display: inline-flex;
  align-items: center;
}

/* 구분자 (>) */
.breadcrumb-item + .breadcrumb-item::before {
  content: ">";
  margin: 0;
  font-family: "Pretendard";
  color: inherit;
  font-weight: inherit;
  speak: none;
}

/* =================================================================
   4. 스크롤 영역 (Scroll Container)
   ================================================================= */

.navigator {
  flex: 1 1 auto; /* 남은 공간 모두 차지 */
  position: relative;
  width: 100%;
  height: 100%;
  padding: 0 0 24px 0;
  box-sizing: border-box;
  overflow-y: auto;

  /* [Firefox] 스크롤바 스타일 */
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
  transition: scrollbar-color 0.3s;
}

/* --- WebKit Scrollbar Custom --- */
.navigator::-webkit-scrollbar {
  width: 6px;
  background-color: transparent;
}
.navigator::-webkit-scrollbar-track {
  background-color: transparent;
}
.navigator::-webkit-scrollbar-thumb {
  background-color: transparent;
  border-radius: 3px;
  background-clip: padding-box;
  border: 1px solid transparent;
  transition: background-color 0.3s;
}

/* 스크롤 시에만 보이기 (JS Class Toggle) */
.navigator.show-scrollbar {
  scrollbar-color: rgba(0, 0, 0, 0.3) transparent; /* Firefox */
}
.navigator.show-scrollbar::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.3); /* WebKit */
}

/* =================================================================
   5. 목차 리스트 스타일 (Navigation List)
   ================================================================= */

.navigator ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* -----------------------------------------------------------------
   Depth 1 (대제목)
   ----------------------------------------------------------------- */
.navigator .depth1 > li {
  scroll-margin: 56px 0 70px; /* 스크롤 이동 시 여백 확보 */
}

/* 버튼 스타일 */
.navigator .depth1--item {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 42px;
  padding: 0 28px;
  background: transparent;
  border: none;
  box-sizing: border-box;
  cursor: pointer;

  /* 폰트 */
  color: #989898;
  font-size: 16px;
  font-weight: 500;
  text-align: left;
  letter-spacing: -0.09px;

  transition: color 0.2s, background 0.2s;
}

/* 활성 상태 */
.navigator .depth1--item.active-nav-item {
  color: #333;
  background: #f1f1f1;
  font-weight: 600;
}

/* 텍스트 (1줄 말줄임) */
.navigator .depth1--text {
  display: block;
  width: 100%;
  font-family: "Pretendard";
  line-height: 2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: keep-all;
}

/* -----------------------------------------------------------------
   Depth 2 (소제목)
   ----------------------------------------------------------------- */
.navigator .depth2 {
  position: relative;
  padding-left: 28px;
  margin: 10px 0; /* 상하 여백 */
}

/* 가이드 라인 (왼쪽 회색 선) */
.navigator .depth2::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #ddd;
  border-radius: 2px;
}

/* 슬라이딩 마커 (Active Bar) */
.nav-marker {
  position: absolute;
  left: 28px;
  width: 2px;
  background-color: #666;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  z-index: 10;
  transition: top 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), height 0.3s ease,
    opacity 0.2s ease;
}

/* 버튼 스타일 */
.navigator .depth2--item {
  display: flex;
  align-items: center;
  position: relative;
  width: 100%;
  min-height: 24px;
  padding: 0 10px;
  background: transparent;
  border: none;
  box-sizing: border-box;
  cursor: pointer;

  /* 폰트 */
  color: #b4b4b4;
  font-size: 14px;
  font-weight: 400;
  text-align: left;
  letter-spacing: -0.07px;
}

/* Hover & Active */
.navigator .depth2--item:hover {
  color: #333;
}
.navigator .depth2--item.active-nav-item {
  color: #333;
  font-weight: 500;
}

/* 텍스트 (3줄 말줄임) */
.navigator .depth2--text {
  display: block;
  /* display: -webkit-box; */
  /* -webkit-line-clamp: 2; */
  /* -webkit-box-orient: vertical; */
  font-family: "Pretendard";
  line-height: 1.2;
  /* overflow: hidden; */
  /* text-overflow: ellipsis; */
  white-space: normal;
  word-break: keep-all;
  /* word-break: break-word; */
}

/* Active 시 텍스트 효과 (Bold 대신 Shadow 사용) */
.navigator .depth2--item.active-nav-item .depth2--text {
  /* text-shadow: 0 0 1px #333; */
  font-weight: 500;
}

/* =================================================================
   6. 반응형 처리 (Responsive)
   ================================================================= */

/* 1600px 미만: 내비게이터 숨김 */
/* 해상도별 본문 패딩 반응형 처리 */
@media screen and (max-width: 1800px) {
  .content .inner {
    padding: 0 240px 0 0;
  }
  .navigator-wrap {
    left: calc(50% + 540px);
  }
}

@media screen and (max-width: 1700px) {
  .content .inner {
    padding: 0 320px 0 0;
  }
  .navigator-wrap {
    left: calc(50% + 500px);
  }
}

@media screen and (max-width: 1600px) {
  .content .inner {
    padding: 0;
  }
}

@media screen and (max-width: 1599px) {
  .navigator-wrap {
    display: none !important;
  }
}

@media screen and (max-width: 1280px) {
  .content .inner {
    max-width: initial;
    padding: 0 20px;
  }
}