/* extra.css — Pretendard 폰트 + 색상 팔레트 + 한국어 가독성 */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');

:root {
  --md-text-font: 'Pretendard', 'Apple SD Gothic Neo', -apple-system, BlinkMacSystemFont, sans-serif;
  --md-code-font: 'D2Coding', 'Fira Code', 'Cascadia Code', monospace;
}

/* 한국어 본문 line-height 보강 */
.md-typeset {
  font-feature-settings: "kern" 1;
  word-break: keep-all;
  line-height: 1.7;
}

.md-typeset h1, .md-typeset h2, .md-typeset h3 {
  word-break: keep-all;
  font-weight: 700;
}

/* 출처 인용 박스 강조 */
.md-typeset blockquote {
  border-left: 3px solid var(--md-accent-fg-color);
  background: rgba(var(--md-default-fg-color--lightest), 0.04);
  padding: 0.5em 0.9em;
  margin: 0.6em 0;
}

.md-typeset blockquote p:first-child {
  margin-top: 0;
}

.md-typeset blockquote p:last-child {
  margin-bottom: 0;
}

/* 표 가독성 보강 */
.md-typeset table:not([class]) {
  font-size: 0.85em;
}

.md-typeset table:not([class]) th {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  font-weight: 600;
}

/* 카드 그리드 */
.md-typeset .grid.cards {
  margin: 1em 0;
}

.md-typeset .grid.cards > ul > li {
  border-radius: 0.4rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.md-typeset .grid.cards > ul > li:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* 플레이스홀더 강조 (Stage 2 hooks 활성 후 효과) */
.md-content [data-placeholder],
.md-content code:has-text('[고객사]') {
  background: rgba(245, 127, 23, 0.12);
  border: 1px dashed #F57F17;
  border-radius: 3px;
  padding: 0 4px;
  font-family: var(--md-code-font);
  color: #E65100;
  font-size: 0.92em;
}

/* =============================================================================
   Phase E9 Stage 2 보강 — 사용자 피드백 #2·#3 대응
   사이드바 활성 항목 강조 + 브레드크럼 + 페이지 정리
   ============================================================================= */

/* 사이드바 활성 항목 — 그라데이션 + 좌측 보더 + 굵은 글씨 */
.md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  background: linear-gradient(90deg, rgba(63, 81, 181, 0.10), transparent);
  border-left: 3px solid var(--md-primary-fg-color);
  font-weight: 700;
  padding-left: calc(0.6rem - 3px);
  border-radius: 0 4px 4px 0;
}

/* 사이드바 섹션 헤더 (9 분류 그룹) — 더 굵게·간격 확보 */
.md-nav__title {
  font-weight: 800;
  font-size: 0.78rem;
  text-transform: none;
  color: var(--md-primary-fg-color);
  margin-top: 0.6rem;
  letter-spacing: -0.01em;
}

/* 사이드바 항목 간격 — 한국어 줄 간격 보강 */
.md-nav__item {
  padding-block: 0.05rem;
}

.md-nav__link {
  word-break: keep-all;
  line-height: 1.5;
}

/* 브레드크럼 영역 — 페이지 상단 위치 강조 */
.md-content__inner > nav.md-path,
.md-path {
  background: rgba(63, 81, 181, 0.05);
  border-radius: 0.4rem;
  padding: 0.4em 0.8em;
  margin-bottom: 0.8em;
  font-size: 0.78em;
  border-left: 3px solid var(--md-primary-fg-color);
}

.md-path__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
  align-items: center;
}

.md-path__item {
  color: var(--md-default-fg-color--light);
}

.md-path__item:not(:last-child)::after {
  content: " › ";
  margin-left: 0.4em;
  color: var(--md-default-fg-color--lighter);
}

.md-path__item:last-child {
  color: var(--md-primary-fg-color);
  font-weight: 600;
}

/* 페이지 하단 prev/next (navigation.footer) — 간격·시각 보강 */
.md-footer__inner.md-grid {
  padding-block: 1rem;
}

.md-footer__link {
  border-radius: 0.4rem;
  transition: background 0.2s ease;
}

.md-footer__link:hover {
  background: rgba(63, 81, 181, 0.08);
}

.md-footer__direction {
  font-size: 0.7rem;
  opacity: 0.7;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.md-footer__title {
  font-weight: 700;
  word-break: keep-all;
}

/* TOC (우측) — 한국어 가독성 + 활성 항목 강조 */
.md-nav--secondary .md-nav__title {
  background: rgba(63, 81, 181, 0.08);
  padding: 0.5em 0.8em;
  border-radius: 0.4rem;
  margin-bottom: 0.4em;
}

.md-nav--secondary .md-nav__link--active {
  font-weight: 700;
  color: var(--md-primary-fg-color);
}

/* 페이지 제목 (H1) — 강조 보강 */
.md-typeset h1 {
  background: linear-gradient(90deg, var(--md-primary-fg-color), transparent 60%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  border-bottom: 2px solid var(--md-primary-fg-color);
  padding-bottom: 0.3em;
  margin-bottom: 1em;
}

/* admonition (callout) — tip 박스 시각 강화 */
.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-left: 4px solid var(--md-accent-fg-color);
}

/* 페이지 본문 좌우 padding — 한국어 가독성 */
.md-content__inner {
  padding-inline: 1rem;
}

/* 모바일 반응형 — 사이드바 라벨 줄바꿈 */
@media screen and (max-width: 76.1875em) {
  .md-nav__link {
    font-size: 0.85rem;
    padding-block: 0.4em;
  }
  .md-path {
    font-size: 0.72em;
  }
}

/* =============================================================================
   Phase E9 Stage 2 — Copy 버튼 + Lightbox (사용자 피드백 추가 #4·#5·#6 대응)
   ============================================================================= */

/* H2/H3 섹션의 우측 끝 Copy 버튼 */
.md-typeset h2,
.md-typeset h3 {
  position: relative;
  padding-right: 6rem; /* Copy 버튼 자리 확보 */
}

.copy-block-btn {
  position: absolute;
  right: 0.4rem;
  top: 50%;
  transform: translateY(-50%);
  background: var(--md-accent-fg-color);
  color: white;
  border: 0;
  border-radius: 0.3rem;
  padding: 0.18rem 0.6rem;
  font-size: 0.68rem;
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, background 0.2s ease;
  z-index: 5;
  font-family: var(--md-text-font);
}

/* 헤더에 hover 또는 포커스 시 Copy 버튼 표시 */
.md-typeset h2:hover .copy-block-btn,
.md-typeset h3:hover .copy-block-btn,
.copy-block-btn:focus,
.md-typeset .md-typeset__table:hover .copy-block-btn,
.md-typeset blockquote:hover .copy-block-btn {
  opacity: 1;
}

.copy-block-btn:hover {
  background: var(--md-primary-fg-color);
}

.copy-block-btn--success {
  background: #2E7D32 !important;
}

/* 표·blockquote 의 인라인 Copy 버튼 — 우측 상단 */
.copy-block-btn--inline {
  top: 0.4rem;
  right: 0.4rem;
  transform: none;
  font-size: 0.62rem;
  padding: 0.15rem 0.4rem;
}

/* 모바일 — Copy 버튼 항상 표시 (hover 미작동) */
@media (hover: none) {
  .copy-block-btn {
    opacity: 0.85;
  }
}

/* Lightbox overlay */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: lightbox-fade-in 0.2s ease;
}

@keyframes lightbox-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox-container {
  max-width: 100vw;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  height: 100%;
  justify-content: center;
}

.lightbox-image {
  max-width: 98vw;       /* 92vw → 98vw — 화면 거의 풀폭 */
  max-height: 88vh;      /* 85vh → 88vh */
  width: auto;
  height: auto;
  object-fit: contain;
  background: white;
  border-radius: 0.4rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  cursor: zoom-in;
  user-select: none;
  transition: transform 0.15s ease-out;
  transform-origin: center center;
}

/* 줌 표시 배지 */
.lightbox-zoom-badge {
  background: rgba(255, 255, 255, 0.92);
  color: #1565C0;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  border-radius: 0.3rem;
  font-family: var(--md-text-font);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  min-width: 68px;
  justify-content: center;
}

/* 사용 안내 — overlay 하단 1 줄 */
.lightbox-hint {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.78rem;
  font-family: var(--md-text-font);
  text-align: center;
  letter-spacing: 0.01em;
  padding: 0.3rem 1rem;
  max-width: 90vw;
  word-break: keep-all;
}

.lightbox-actions {
  display: flex;
  gap: 0.6rem;
}

.lightbox-btn {
  background: white;
  color: #333;
  border: 0;
  border-radius: 0.3rem;
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--md-text-font);
  transition: background 0.2s ease, transform 0.1s ease;
}

.lightbox-btn:hover {
  background: var(--md-accent-fg-color);
  color: white;
  transform: translateY(-1px);
}

.lightbox-btn--download {
  background: var(--md-primary-fg-color);
  color: white;
}

.lightbox-btn--download:hover {
  background: var(--md-accent-fg-color);
}

/* 본문 이미지 hover 시 zoom 커서 */
.lightbox-trigger {
  cursor: zoom-in;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.lightbox-trigger:hover {
  opacity: 0.92;
}

/* SVG inline 그림 (figure) 시각 정리 */
.md-typeset figure {
  margin: 1.2em 0;
  text-align: center;
}

.md-typeset figure svg.zoomable,
.md-typeset figure img {
  max-width: 100%;
  height: auto;
  border-radius: 0.4rem;
}

.md-typeset figcaption {
  margin-top: 0.5em;
  font-size: 0.85em;
  color: var(--md-default-fg-color--light);
  font-style: normal;
}

/* 다운로드 안내 아이콘 (figure 우상단 hint) */
.md-typeset figure {
  position: relative;
}

.md-typeset figure::after {
  content: "🔍 클릭하여 확대·다운로드";
  position: absolute;
  bottom: 0.5em;
  right: 0.5em;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.2em 0.6em;
  border-radius: 0.3rem;
  font-size: 0.7em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.md-typeset figure:hover::after {
  opacity: 1;
}

/* =============================================================================
   D3 Cross-reference 그래프 (graph.md 페이지)
   ============================================================================= */

#crossref-graph .crossref-graph-svg {
  width: 100%;
  height: 600px;
  display: block;
}

.crossref-stats {
  margin-top: 0.8rem;
  padding: 0.5rem 0.8rem;
  background: var(--md-code-bg-color);
  border-radius: 0.4rem;
  font-size: 0.8rem;
  font-family: var(--md-text-font);
}

.crossref-legend {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-size: 0.75rem;
}

.crossref-legend .legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.crossref-legend .legend-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  display: inline-block;
}

/* =============================================================================
   Phase E10-1 — UX 정비 (사용자 피드백 "어지럽고 산만")
   ============================================================================= */

/* 워크스페이스 메타 약화 (.meta-marker — Phase·엔트리·방법론·에이전트 ID) */
.md-content .meta-marker {
  color: var(--md-default-fg-color--lighter);
  font-size: 0.82em;
  opacity: 0.55;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  border-bottom: 1px dotted var(--md-default-fg-color--lightest);
  padding: 0 1px;
  cursor: help;
}

.md-content .meta-marker:hover {
  opacity: 0.85;
}

/* Hero SVG max-height — 기존 ~480px 대비 50% 축소 */
.md-typeset figure svg.zoomable,
.md-typeset figure img {
  max-height: 280px;
  width: auto;
  object-fit: contain;
  margin-inline: auto;
}

/* H1 그라데이션 텍스트 제거 — 가독성 우선 단색 + 두꺼운 좌측 보더 */
.md-typeset h1 {
  background: none;
  -webkit-text-fill-color: initial;
  background-clip: initial;
  -webkit-background-clip: initial;
  color: var(--md-primary-fg-color);
  border-bottom: 2px solid var(--md-primary-fg-color);
  border-left: 5px solid var(--md-primary-fg-color);
  padding: 0.2em 0 0.2em 0.6em;
  margin-bottom: 0.8em;
  font-size: 1.95em;
}

/* 페이지 정보 details (메타 collapsible) — wrap_meta_blockquote 의 산출 */
.md-typeset details.info[open],
.md-typeset details.info {
  border-left: 3px solid var(--md-default-fg-color--lighter);
  background: var(--md-code-bg-color);
  font-size: 0.88em;
}

.md-typeset details.info > summary {
  font-weight: 600;
  color: var(--md-default-fg-color--light);
  background: transparent;
  padding-block: 0.4em;
}

.md-typeset details.info > summary::before {
  content: none; /* 기존 admonition 아이콘 제거 */
}

/* Paste-ready admonition — 신규 'copy' 타입 (사용자 main use case) */
.md-typeset .admonition.copy,
.md-typeset details.copy {
  border-left: 5px solid #F57F17;
  background: rgba(245, 127, 23, 0.04);
  position: relative;
  margin: 1em 0;
}

.md-typeset .admonition.copy > .admonition-title,
.md-typeset details.copy > summary {
  background: rgba(245, 127, 23, 0.12);
  color: #E65100;
  font-weight: 700;
  border-bottom: 1px solid rgba(245, 127, 23, 0.2);
}

.md-typeset .admonition.copy > .admonition-title::before,
.md-typeset details.copy > summary::before {
  content: "📋";
  margin-right: 0.5em;
  font-size: 1.1em;
}

/* 페이지 footer "이 페이지 정보" details (개발자용 메타) */
.md-typeset details.meta-footer {
  margin-top: 2em;
  border-left: 3px solid var(--md-default-fg-color--lightest);
  background: var(--md-code-bg-color);
  font-size: 0.82em;
}

.md-typeset details.meta-footer > summary {
  color: var(--md-default-fg-color--light);
  font-weight: 500;
}

/* 페이지 본문 viewport 비율 개선 — 상단 여백 줄임 */
.md-content__inner > h1:first-child {
  margin-top: 0.4em;
}

/* 출처 인용 (`> [출처: ...]`) — 시각 약화 (메타 성격) */
.md-typeset blockquote p:first-child:has(a[href*=".md"]):only-child,
.md-typeset blockquote:only-child {
  font-size: 0.85em;
  opacity: 0.75;
  border-left-color: var(--md-default-fg-color--lighter);
}

/* 사이드바 그룹 헤더 좌측 보더 강조 (그룹 시각 분리) */
.md-nav__title {
  border-left: 3px solid var(--md-primary-fg-color);
  padding-left: 0.5rem;
}

/* 모바일 반응형 — 메타 marker hover 비활성 */
@media (hover: none) {
  .md-content .meta-marker:hover {
    opacity: 0.55;
  }
}

/* =============================================================================
   Phase E10-2 — 홈 redesign + 3 giant button (사용자 여정 진입)
   ============================================================================= */

/* 홈 페이지 — H1 가운데 정렬 + 부드러운 강조 */
.md-content article > h1:first-of-type {
  text-align: center;
  border-left: none;
  border-bottom: 3px solid var(--md-primary-fg-color);
  padding-bottom: 0.5em;
  font-size: 2.4em;
  font-weight: 800;
}

/* 홈 hero figure 가운데 정렬 + 약한 그림자 */
.md-content article > p > .md-typeset__svg,
.md-content article > figure:first-of-type {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 1em auto 2em;
}

/* 3 giant button (홈) — 카드 형태 강조 */
.md-typeset .grid.cards > ul > li:has(.md-button) {
  text-align: center;
  padding-block: 1.5em;
  border-radius: 0.6rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.md-typeset .grid.cards > ul > li:has(.md-button):hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(63, 81, 181, 0.15);
}

.md-typeset .md-button {
  margin-top: 0.5em;
  font-weight: 700;
}

.md-typeset .md-button.md-button--primary {
  background: var(--md-primary-fg-color);
  border-color: var(--md-primary-fg-color);
  color: white;
}

.md-typeset .md-button.md-button--primary:hover {
  background: var(--md-accent-fg-color);
  border-color: var(--md-accent-fg-color);
  transform: translateX(2px);
}

/* accent-text — 아이콘 강조 색상 */
.accent-text {
  color: var(--md-accent-fg-color) !important;
}

/* 홈 통계 그리드 — 2열 정렬 */
.md-content article > .grid:not(.cards) {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.6em 1.5em;
  margin: 1.5em 0;
  padding: 1em;
  background: var(--md-code-bg-color);
  border-radius: 0.4rem;
  font-size: 0.9em;
}

.md-content article > .grid:not(.cards) p {
  margin: 0;
}

.md-content article > .grid:not(.cards) code {
  font-weight: 700;
  font-size: 1.2em;
  color: var(--md-primary-fg-color);
  background: transparent;
  padding: 0;
  margin-right: 0.3em;
}

/* =============================================================================
   Phase E10-5 — 홈 페이지 미니멀화 (사용자 "첫 페이지부터 어지럽다" 직접 대응)
   ============================================================================= */

/* 홈 페이지 본문 max-width 좁힘 — 한 화면 안에 핵심 안내만 */
.md-content article:has(.home-cta) {
  max-width: 760px;
  margin: 0 auto;
  padding-block: 2em;
}

/* 홈 H1 — 더 큼·가운데 + 단순 */
.md-content article:has(.home-cta) > h1:first-of-type {
  text-align: center;
  font-size: 2.6em;
  border: none;
  border-bottom: 2px solid var(--md-primary-fg-color);
  padding-bottom: 0.4em;
  margin-bottom: 1em;
  font-weight: 800;
  background: none;
  -webkit-text-fill-color: initial;
}

/* 홈 본문 첫 단락 — 부드러운 강조 */
.md-content article:has(.home-cta) > p:first-of-type {
  font-size: 1.1em;
  text-align: center;
  color: var(--md-default-fg-color--light);
  margin-bottom: 2em;
  line-height: 1.7;
}

/* 홈 H2 — 가운데 정렬 + 큰 강조 (CTA 안내) */
.md-content article:has(.home-cta) > h2 {
  text-align: center;
  font-size: 1.6em;
  font-weight: 700;
  color: var(--md-primary-fg-color);
  margin: 2em 0 1em;
  border: none;
  border-left: none;
  padding: 0;
}

.md-content article:has(.home-cta) > h2 strong {
  background: var(--md-accent-fg-color);
  color: white;
  padding: 0.1em 0.5em;
  border-radius: 0.3rem;
  font-weight: 800;
}

/* 홈 giant button (1 차 CTA) */
.home-cta {
  display: flex;
  justify-content: center;
  margin: 1.5em 0;
}

.home-giant-btn {
  font-size: 1.3em !important;
  padding: 1em 2em !important;
  font-weight: 800 !important;
  border-radius: 0.6rem !important;
  background: linear-gradient(135deg, var(--md-primary-fg-color), var(--md-accent-fg-color)) !important;
  color: white !important;
  border: none !important;
  box-shadow: 0 4px 14px rgba(63, 81, 181, 0.25) !important;
  transition: transform 0.15s ease, box-shadow 0.15s ease !important;
  letter-spacing: -0.01em;
}

.home-giant-btn:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 22px rgba(63, 81, 181, 0.4) !important;
  color: white !important;
}

/* 홈 H3 (2 차 진입점) — 단순 */
.md-content article:has(.home-cta) > h3 {
  font-size: 1.05em;
  color: var(--md-default-fg-color--light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin: 2.5em 0 1em;
  text-align: center;
  border: none;
  padding: 0;
}

/* 홈 본문 link list (2 차 진입) — 간격 보강 */
.md-content article:has(.home-cta) > ul {
  list-style: none;
  padding: 0;
}

.md-content article:has(.home-cta) > ul > li {
  padding: 0.6em 0.8em;
  margin-block: 0.4em;
  border-radius: 0.4rem;
  background: var(--md-code-bg-color);
  transition: background 0.15s ease;
  font-size: 0.95em;
}

.md-content article:has(.home-cta) > ul > li:hover {
  background: rgba(63, 81, 181, 0.08);
}

.md-content article:has(.home-cta) > ul > li > .md-button {
  margin-left: 0.5em;
  font-size: 0.85em;
}

/* 홈 hr 단순 */
.md-content article:has(.home-cta) > hr {
  border: 0;
  border-top: 1px solid var(--md-default-fg-color--lightest);
  margin: 2em 0;
}

/* =============================================================================
   Phase E10-3 — 읽기 시간 배지 + 페이지 footer 메타
   ============================================================================= */

/* 읽기 시간 배지 — H1 직후 작은 inline */
.reading-time-badge {
  display: inline-block;
  background: var(--md-code-bg-color);
  color: var(--md-default-fg-color--light);
  font-size: 0.8em;
  font-weight: 500;
  padding: 0.2em 0.7em;
  border-radius: 1em;
  margin: 0.2em 0 0.8em 0;
  letter-spacing: 0.02em;
  border: 1px solid var(--md-default-fg-color--lightest);
}

/* 페이지 footer 메타 details — 항상 닫힌 상태 (개발자 명시 클릭 시만 펼침) */
.md-typeset details[class~="note"]:has(summary:contains("이 페이지 정보")),
.md-typeset details > summary:has-text("이 페이지 정보") {
  margin-top: 2em;
  font-size: 0.85em;
}

/* =============================================================================
   Phase E11-1 — TOC 좌·우 정비 (사용자 4 호소 #1·#2)
   우측 H3 숨김 + 사이드바 4 그룹 헤더 강조 + SVG 세로형 대비
   ============================================================================= */

/* 우측 TOC — H3 이하 숨김 (H2 만 표시, pkg1 기준 55 → 9 항목) */
.md-nav--secondary .md-nav__list .md-nav__list {
  display: none;
}

/* 우측 TOC — 최대 높이 제한 + 스크롤 (긴 페이지 대비) */
.md-nav--secondary .md-nav__list {
  max-height: calc(100vh - 220px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--md-default-fg-color--lightest) transparent;
}

.md-nav--secondary .md-nav__list::-webkit-scrollbar {
  width: 4px;
}

.md-nav--secondary .md-nav__list::-webkit-scrollbar-thumb {
  background: var(--md-default-fg-color--lightest);
  border-radius: 2px;
}

/* 우측 TOC 제목 보강 — "On this page" 영문 → 시각 강조 */
.md-nav--secondary > .md-nav__title {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--md-primary-fg-color);
  margin-bottom: 0.5em;
  padding: 0.6em 0.5em;
  border-bottom: 2px solid var(--md-default-fg-color--lightest);
  text-transform: none;
}

/* 우측 TOC H2 항목 — 적당한 간격 + 가독성 */
.md-nav--secondary .md-nav__link {
  padding: 0.35em 0;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--md-default-fg-color--light);
}

.md-nav--secondary .md-nav__link--active {
  color: var(--md-primary-fg-color);
  font-weight: 700;
  background: none;
  border-left: none;
}

/* 좌측 사이드바 4 그룹 헤더 — 더 강한 시각 분리 */
.md-nav--lifted > .md-nav__list > .md-nav__item--section > .md-nav__link,
.md-nav--lifted > .md-nav__list > .md-nav__item--section > label.md-nav__link {
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--md-primary-fg-color);
  padding: 0.7em 0.6em 0.5em;
  letter-spacing: -0.01em;
}

/* 사이드바 sub-그룹 (4 그룹 안의 nested) 들여쓰기 단순화 */
.md-nav--lifted .md-nav .md-nav .md-nav {
  padding-left: 0.5em;
  border-left: 1px solid var(--md-default-fg-color--lightest);
  margin-left: 0.4em;
}

/* [E14-Fix] SVG 이미지 정책 전면 재정의 (사용자 호소 "세로로 너무 큼")
   - 일반 figure: 90% 폭 + 여백 + 적절한 max-height
   - 세로형 디자인 SVG (600×800): 620×850 (정확한 viewBox 표시)
   - mmdc 다이어그램 (다양한 viewBox): max-width 760px + max-height 540px (강제 제한)
   - 홈 hero: 700×600
   - 진단 C 보고: L910 selector 가 L503 의 280px override 문제 해결 */
.md-typeset figure svg,
.md-typeset figure img,
.md-typeset .md-content figure svg.zoomable,
.md-typeset .md-content figure img.zoomable,
.md-typeset .hero-svg-wrap svg,
.md-typeset .hero-svg-wrap img,
.md-typeset img[src$=".svg"] {
  max-width: 100%;
  max-height: 720px;     /* 무제한 → 720px 강제 제한 (사용자 "세로 너무 큼" 호소) */
  width: auto;
  height: auto;
  margin: 1.5em auto;
  display: block;
  object-fit: contain;
}

/* 세로형 디자인 SVG (assets/svg/, viewBox 600×800) */
.md-typeset figure img[src*="/svg/"],
.md-typeset img[src*="/svg/"]:not([src*="/diagrams/"]) {
  max-width: 620px;      /* 720px → 620px (viewBox 600 + 여백) */
  max-height: 850px;
}

/* mmdc 변환 다이어그램 (가로형 위주, viewBox 200~2900px 광범위) */
.md-typeset img[src*="/diagrams/"] {
  max-width: 760px !important;   /* 100% → 760px (본문 폭 가득 차게 안 늘어남) */
  max-height: 540px !important;  /* none → 540px (사용자 호소 핵심 fix) */
  width: auto !important;
  height: auto !important;
}

/* hero SVG (홈) — 본문 폭 절반 */
.md-content article:has(.home-cta) figure svg,
.md-content article:has(.home-cta) figure img {
  max-width: 700px !important;
  max-height: 600px !important;
}

/* 모바일 추가 제한 (640px 이하) */
@media screen and (max-width: 40em) {
  .md-typeset img[src*="/diagrams/"] {
    max-width: 100% !important;
    max-height: 400px !important;
  }
  .md-typeset figure img[src*="/svg/"],
  .md-typeset img[src*="/svg/"]:not([src*="/diagrams/"]) {
    max-width: 100%;
    max-height: 600px;
  }
}

/* 모바일 — TOC 양쪽 비활성 시 본문 폭 정상 */
@media screen and (max-width: 76.1875em) {
  .md-nav--secondary {
    display: none;
  }
}

/* =============================================================================
   Phase E12-A — 현대적 SaaS 디자인 시스템 (Linear · Vercel · Stripe 톤)
   ----------------------------------------------------------------------------
   사용자 피드백 — 기본 Material 톤 (딥블루+틸+앰버) → Indigo·Violet·Pink 그라데이션,
   slate neutral, glassmorphism, 정교 다층 shadow, 한국어 본문 가독성 우선.
   기존 Phase E10·E11 hooks selector (--active, .lightbox-, .placeholder-tag,
   .admonition.copy, .meta-marker, .home-cta, .home-giant-btn, .reading-time-badge)
   는 1 줄도 변경 안 함 (보존). 이하 ~500 줄은 끝에 적층.
   ============================================================================= */

:root {
  /* === Indigo · Violet primary scale === */
  --color-indigo-50:  #EEF2FF;
  --color-indigo-100: #E0E7FF;
  --color-indigo-200: #C7D2FE;
  --color-indigo-400: #818CF8;
  --color-indigo-500: #6366F1;
  --color-indigo-600: #4F46E5;
  --color-indigo-700: #4338CA;
  --color-indigo-800: #3730A3;
  --color-indigo-900: #312E81;

  --color-violet-500: #8B5CF6;
  --color-pink-500:   #EC4899;
  --color-cyan-500:   #06B6D4;

  /* === Slate (neutral) === */
  --color-slate-50:   #F8FAFC;
  --color-slate-100:  #F1F5F9;
  --color-slate-200:  #E2E8F0;
  --color-slate-300:  #CBD5E1;
  --color-slate-400:  #94A3B8;
  --color-slate-500:  #64748B;
  --color-slate-600:  #475569;
  --color-slate-700:  #334155;
  --color-slate-800:  #1E293B;
  --color-slate-900:  #0F172A;
  --color-slate-950:  #020617;

  /* === Accent === */
  --color-emerald-500: #10B981;
  --color-amber-500:   #F59E0B;
  --color-rose-500:    #F43F5E;

  /* === Brand gradients === */
  --grad-brand:      linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
  --grad-brand-soft: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(236,72,153,0.04) 100%);
  --grad-cool:       linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
  --grad-warm:       linear-gradient(135deg, #F59E0B 0%, #EC4899 100%);

  /* === Shadows (정교 다층) === */
  --shadow-xs: 0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm: 0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.08), 0 2px 4px -2px rgba(15,23,42,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15,23,42,0.10), 0 4px 6px -4px rgba(15,23,42,0.06);
  --shadow-xl: 0 20px 25px -5px rgba(15,23,42,0.12), 0 8px 10px -6px rgba(15,23,42,0.08);
  --shadow-glow-indigo: 0 0 0 1px rgba(99,102,241,0.16), 0 8px 24px -4px rgba(99,102,241,0.32);

  /* === Radius === */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* === Spacing === */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;

  /* === Typography scale === */
  --font-size-xs:   0.78rem;
  --font-size-sm:   0.87rem;
  --font-size-base: 1rem;
  --font-size-lg:   1.13rem;
  --font-size-xl:   1.31rem;
  --font-size-2xl:  1.69rem;
  --font-size-3xl:  2.13rem;
  --font-size-4xl:  2.75rem;

  /* === Easing === */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* === MkDocs Material 토큰 override (라이트) ============================ */
:root,
[data-md-color-scheme="default"] {
  --md-primary-fg-color:        var(--color-indigo-600);
  --md-primary-fg-color--light: var(--color-indigo-400);
  --md-primary-fg-color--dark:  var(--color-indigo-800);
  --md-accent-fg-color:         var(--color-violet-500);
  --md-accent-fg-color--transparent: rgba(139, 92, 246, 0.1);
  --md-typeset-a-color:         var(--color-indigo-600);
}

/* === 본문 typography 계층 — H1~H3 + 단락 ============================== */
.md-typeset h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--color-slate-900);
  margin: 0 0 0.6em;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.md-typeset h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: -0.018em;
  line-height: 1.25;
  color: var(--color-slate-900);
  margin: 1.8em 0 0.7em;
  padding-bottom: 0.3em;
  border-bottom: 2px solid transparent;
  border-image: var(--grad-brand) 1;
  border-image-slice: 1;
}

.md-typeset h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.3;
  color: var(--color-slate-800);
  margin: 1.6em 0 0.6em;
}

.md-typeset h4 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-slate-700);
  margin: 1.4em 0 0.5em;
}

.md-typeset p {
  font-size: var(--font-size-lg);
  line-height: 1.75;
  color: var(--color-slate-700);
  margin: 0 0 1em;
}

.md-typeset p + p {
  margin-top: 1.4em;
}

.md-typeset h2 + p { margin-top: 0.6em; }
.md-typeset h3 + p { margin-top: 0.4em; }
.md-typeset table + p,
.md-typeset p + table { margin-top: 1.5em; }
.md-typeset figure { margin: 2em auto; }

/* === blockquote — glassmorphism + gradient bar ======================== */
.md-typeset blockquote {
  position: relative;
  background: rgba(99, 102, 241, 0.04);
  border-left: 3px solid transparent;
  border-image: var(--grad-brand) 1;
  border-image-slice: 1;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 0.85em 1.1em;
  margin: 1em 0;
  color: var(--color-slate-700);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-xs);
}

/* nested 인용 (출처 표기) — 더 흐린 톤 + subtle gradient bar */
.md-typeset blockquote blockquote {
  background: rgba(139, 92, 246, 0.05);
  border-left-width: 2px;
  font-size: 0.95em;
  color: var(--color-slate-600);
}

/* === 표 — rounded + gradient header ================================== */
.md-typeset table:not([class]) {
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid var(--color-slate-200);
  font-size: 0.9em;
}

.md-typeset table:not([class]) th {
  background: var(--grad-brand);
  color: #fff;
  font-weight: 600;
  letter-spacing: -0.005em;
  padding: 0.75em 1em;
  border: none;
}

.md-typeset table:not([class]) td {
  padding: 0.7em 1em;
  border-top: 1px solid var(--color-slate-100);
  color: var(--color-slate-700);
}

.md-typeset table:not([class]) tr:nth-child(even) td {
  background: var(--color-slate-50);
}

.md-typeset table:not([class]) tr:hover td {
  background: rgba(99, 102, 241, 0.04);
}

/* === 카드 그리드 — hover 강화 ========================================= */
.md-typeset .grid.cards > ul > li {
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  background: #fff;
  padding: var(--space-lg);
  transition:
    transform 250ms var(--ease-out),
    box-shadow 250ms var(--ease-out),
    border-color 250ms var(--ease-out);
}

.md-typeset .grid.cards > ul > li:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-indigo-400);
}

/* === admonition — glassmorphism + gradient left bar =================== */
.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-200);
  border-left: 4px solid transparent;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.md-typeset .admonition.note,
.md-typeset details.note {
  border-image: var(--grad-cool) 1;
  border-image-slice: 1;
  border-left-width: 4px;
}

.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-image: linear-gradient(135deg, #10B981 0%, #06B6D4 100%) 1;
  border-image-slice: 1;
}

.md-typeset .admonition.warning,
.md-typeset details.warning {
  border-image: var(--grad-warm) 1;
  border-image-slice: 1;
}

.md-typeset .admonition.danger,
.md-typeset details.danger {
  border-image: linear-gradient(135deg, #F43F5E 0%, #EC4899 100%) 1;
  border-image-slice: 1;
}

/* copy admonition (E10·E11 hook 의존성 보존 + 보강) */
.md-typeset .admonition.copy {
  border-left: 4px solid transparent;
  border-image: linear-gradient(180deg, #F59E0B 0%, #F43F5E 100%) 1;
  border-image-slice: 1;
  background: linear-gradient(135deg,
    rgba(245, 158, 11, 0.06) 0%,
    rgba(244, 63, 94, 0.04) 100%);
}

/* === Hover · focus 14 종 ============================================== */

/* 본문 링크 — gradient underline grow */
.md-typeset a:not(.md-button):not(.md-nav__link) {
  color: var(--color-indigo-600);
  text-decoration: none;
  background-image: var(--grad-brand);
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 200ms var(--ease-out), color 200ms var(--ease-out);
}

.md-typeset a:not(.md-button):not(.md-nav__link):hover {
  color: var(--color-indigo-700);
  background-size: 100% 2px;
}

/* 사이드바 active — gradient subtle + 좌측 gradient border (E10 hook 보존) */
.md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.10) 0%,
    rgba(139, 92, 246, 0.04) 60%,
    transparent 100%);
  font-weight: 700;
}

/* inline code — slate-100 + indigo-700 */
.md-typeset code {
  background: var(--color-slate-100);
  color: var(--color-indigo-700);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.4em;
  font-size: 0.92em;
  font-weight: 500;
  border: 1px solid var(--color-slate-200);
}

.md-typeset pre code {
  background: transparent;
  border: none;
  color: inherit;
  padding: 0;
}

.md-typeset pre {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* md-button — primary indigo gradient */
.md-typeset .md-button {
  border-radius: var(--radius-md);
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: all 200ms var(--ease-out);
  border: 1px solid var(--color-slate-200);
}

.md-typeset .md-button--primary {
  background: var(--grad-brand);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

.md-typeset .md-button--primary:hover,
.md-typeset .md-button--primary:focus {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-indigo);
  color: #fff;
}

.md-typeset .md-button:not(.md-button--primary):hover {
  border-color: var(--color-indigo-400);
  background: rgba(99, 102, 241, 0.04);
  color: var(--color-indigo-700);
}

/* 헤더 (md-header) — 살짝 glass */
.md-header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-xs);
  color: var(--color-slate-900);
}

[data-md-color-scheme="default"] .md-header {
  color: var(--color-slate-900);
}

[data-md-color-scheme="default"] .md-header__title,
[data-md-color-scheme="default"] .md-search__input {
  color: var(--color-slate-900);
}

[data-md-color-scheme="default"] .md-search__input::placeholder {
  color: var(--color-slate-500);
}

/* === 세로형 레이아웃 정리 =========================================== */
:root {
  --md-grid: 76rem;       /* [E12-Fix-3] 60rem → 76rem (~1216px) — 사용자 "본문 폭 좁음" 호소 */
}

.md-grid {
  max-width: 76rem;
}

/* === 페이지 진입 애니메이션 ========================================== */
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes cardStaggerIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes admonitionSlideIn {
  from { opacity: 0; transform: translateX(-8px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes heroGradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.md-content article {
  animation: pageFadeIn 400ms var(--ease-out);
}

.md-typeset .grid.cards > ul > li {
  animation: cardStaggerIn 450ms var(--ease-out) both;
}

.md-typeset .grid.cards > ul > li:nth-child(2) { animation-delay: 60ms; }
.md-typeset .grid.cards > ul > li:nth-child(3) { animation-delay: 120ms; }
.md-typeset .grid.cards > ul > li:nth-child(4) { animation-delay: 180ms; }
.md-typeset .grid.cards > ul > li:nth-child(5) { animation-delay: 240ms; }
.md-typeset .grid.cards > ul > li:nth-child(6) { animation-delay: 300ms; }

.md-typeset .admonition,
.md-typeset details {
  animation: admonitionSlideIn 350ms var(--ease-out) both;
}

/* hero gradient (홈·index 의 home-cta 영역) — 부드러운 shift */
.md-content article:has(.home-cta) h1 {
  background: var(--grad-brand);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation:
    pageFadeIn 400ms var(--ease-out),
    heroGradientShift 8s linear infinite;
}

/* prefers-reduced-motion — 모션 비활성 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* === 다크 모드 (slate-based) ========================================== */
[data-md-color-scheme="slate"] {
  --md-default-bg-color:        var(--color-slate-950);
  --md-default-bg-color--light: var(--color-slate-900);
  --md-default-fg-color:        var(--color-slate-100);
  --md-default-fg-color--light: var(--color-slate-300);
  --md-default-fg-color--lighter: var(--color-slate-400);
  --md-default-fg-color--lightest: var(--color-slate-700);

  --md-primary-fg-color:        var(--color-indigo-500);
  --md-primary-fg-color--light: var(--color-indigo-400);
  --md-primary-fg-color--dark:  var(--color-indigo-700);
  --md-accent-fg-color:         var(--color-violet-500);
  --md-typeset-a-color:         var(--color-indigo-400);

  --md-code-bg-color:           var(--color-slate-800);
  --md-code-fg-color:           var(--color-slate-100);

  /* 다크 그림자 — rgba(0,0,0,0.5) 기반 */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.30);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.40), 0 1px 2px rgba(0,0,0,0.30);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.50), 0 2px 4px -2px rgba(0,0,0,0.40);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.55), 0 4px 6px -4px rgba(0,0,0,0.45);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.60), 0 8px 10px -6px rgba(0,0,0,0.50);
  --shadow-glow-indigo: 0 0 0 1px rgba(99,102,241,0.32), 0 8px 24px -4px rgba(99,102,241,0.45);
}

[data-md-color-scheme="slate"] .md-typeset h1 {
  color: var(--color-slate-50);
}

[data-md-color-scheme="slate"] .md-typeset h2,
[data-md-color-scheme="slate"] .md-typeset h3 {
  color: var(--color-slate-100);
}

[data-md-color-scheme="slate"] .md-typeset h4 {
  color: var(--color-slate-200);
}

[data-md-color-scheme="slate"] .md-typeset p {
  color: var(--color-slate-300);
}

[data-md-color-scheme="slate"] .md-typeset blockquote {
  background: rgba(99, 102, 241, 0.10);
  color: var(--color-slate-200);
}

[data-md-color-scheme="slate"] .md-typeset blockquote blockquote {
  background: rgba(139, 92, 246, 0.08);
  color: var(--color-slate-400);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) {
  border-color: var(--color-slate-700);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) td {
  background: var(--color-slate-900);
  border-top-color: var(--color-slate-800);
  color: var(--color-slate-200);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) tr:nth-child(even) td {
  background: var(--color-slate-800);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) tr:hover td {
  background: rgba(99, 102, 241, 0.12);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li {
  background: var(--color-slate-900);
  border-color: var(--color-slate-700);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li:hover {
  border-color: var(--color-indigo-400);
  background: var(--color-slate-800);
}

[data-md-color-scheme="slate"] .md-typeset .admonition,
[data-md-color-scheme="slate"] .md-typeset details {
  background: rgba(30, 41, 59, 0.7);
  border-color: var(--color-slate-700);
}

[data-md-color-scheme="slate"] .md-typeset code {
  background: var(--color-slate-800);
  color: var(--color-indigo-200);
  border-color: var(--color-slate-700);
}

[data-md-color-scheme="slate"] .md-header {
  background: rgba(2, 6, 23, 0.85);
  color: var(--color-slate-100);
}

[data-md-color-scheme="slate"] .md-typeset a:not(.md-button):not(.md-nav__link) {
  color: var(--color-indigo-400);
}

[data-md-color-scheme="slate"] .md-typeset a:not(.md-button):not(.md-nav__link):hover {
  color: var(--color-indigo-200);
}

[data-md-color-scheme="slate"] .md-nav__link--active,
[data-md-color-scheme="slate"] .md-nav__item--active > .md-nav__link {
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.20) 0%,
    rgba(139, 92, 246, 0.08) 60%,
    transparent 100%);
}

[data-md-color-scheme="slate"] .md-typeset .admonition.copy {
  background: linear-gradient(135deg,
    rgba(245, 158, 11, 0.10) 0%,
    rgba(244, 63, 94, 0.06) 100%);
}

/* =========================== Phase E12-A 끝 ============================== */

/* =============================================================================
   Phase E12-D — 사이드바 콘텐츠 그룹 정리 (사용자 "왼쪽 메뉴 꼬라지" 호소)
   문제: 콘텐츠 그룹 안 25 항목 일괄 노출 + 간격 넓음 + 시각 위계 약함
   해결: 항목 간격 축소·sub-그룹 헤더 시각 차별·active 그룹만 강조 펼침
   ============================================================================= */

/* 좌측 사이드바 — 항목 간격 압축 (현재 너무 넓음) */
.md-nav__item {
  padding: 0;
}

.md-nav__list .md-nav__list .md-nav__item {
  margin: 0;
}

/* 사이드바 항목 link — 간격 축소·폰트 약간 줄임 */
.md-sidebar--primary .md-nav__link {
  padding: 0.32em 0.6em;
  margin: 0.05em 0;
  font-size: 0.82rem;
  line-height: 1.4;
  border-radius: 6px;
  transition: background 0.18s var(--ease-out, ease), color 0.18s var(--ease-out, ease);
}

.md-sidebar--primary .md-nav__link:hover {
  background: var(--color-indigo-50, rgba(99, 102, 241, 0.06));
  color: var(--color-indigo-700, #4338CA);
}

/* sub-그룹 헤더 (🔧 기술 트랙·📦 통합 파일럿·🎯 시나리오·모듈) — 시각 위계 명확화 */
.md-nav--lifted .md-nav .md-nav .md-nav__title,
.md-nav--lifted label.md-nav__link.md-nav__container {
  font-weight: 700;
  font-size: 0.78rem;
  color: var(--color-slate-700, #334155);
  text-transform: none;
  letter-spacing: -0.005em;
  padding: 0.55em 0.6em 0.3em;
  margin-top: 0.5em;
  margin-bottom: 0.1em;
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.04) 0%,
    transparent 80%);
  border-left: 2px solid var(--color-indigo-200, #C7D2FE);
  border-radius: 0 6px 6px 0;
  letter-spacing: -0.005em;
}

/* 1 그룹 헤더 (🚀 시작·📦 콘텐츠·📋 운영·참고·📌 메타) — 더 강한 시각 강조 */
.md-nav--lifted > .md-nav__list > .md-nav__item--section > .md-nav__link,
.md-nav--lifted > .md-nav__list > .md-nav__item--section > label.md-nav__link {
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--color-indigo-700, #4338CA);
  padding: 0.7em 0.6em 0.35em;
  margin-top: 0.6em;
  letter-spacing: -0.012em;
  border-left: 3px solid var(--color-indigo-500, #6366F1);
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.08) 0%,
    transparent 60%);
  border-radius: 0 8px 8px 0;
}

/* sub-그룹 안 항목 들여쓰기 정리 (단일 단계만 들여쓰기, 다중 단계 회피) */
.md-nav--lifted .md-nav .md-nav .md-nav .md-nav__link {
  padding-left: 1em;
  font-size: 0.81rem;
  color: var(--color-slate-700, #334155);
}

/* 활성 항목 — 더 명확한 강조 (Phase E11-1 의 단순 좌측 보더 → gradient + glow) */
.md-sidebar--primary .md-nav__link--active,
.md-sidebar--primary .md-nav__item--active > .md-nav__link {
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.16) 0%,
    rgba(139, 92, 246, 0.06) 60%,
    transparent 100%);
  color: var(--color-indigo-700, #4338CA);
  border-left: 3px solid var(--color-indigo-500, #6366F1);
  font-weight: 700;
  padding-left: calc(0.6em - 3px);
  border-radius: 0 6px 6px 0;
  box-shadow: 0 1px 2px rgba(99, 102, 241, 0.08);
}

/* 비활성 sub-그룹 — 항목 시각 약화 (active 그룹만 부각) */
.md-nav--lifted > .md-nav__list > .md-nav__item--section:not(:has(.md-nav__link--active))
  > nav.md-nav > .md-nav__list .md-nav__link {
  color: var(--color-slate-600, #475569);
}

/* 사이드바 전체 좌·우 padding 축소 (1 화면에 더 많은 항목) */
.md-sidebar--primary .md-sidebar__scrollwrap {
  scrollbar-width: thin;
  scrollbar-color: var(--color-slate-300, #CBD5E1) transparent;
}

.md-sidebar--primary .md-sidebar__inner {
  padding: 0.6rem 0.4rem;
}

/* sub-그룹 사이 separator (시각 분리) */
.md-nav--lifted .md-nav__item--section + .md-nav__item--section {
  margin-top: 0.4em;
  padding-top: 0.4em;
  border-top: 1px dashed var(--color-slate-200, #E2E8F0);
}

/* 다크 모드 호환 */
[data-md-color-scheme="slate"] .md-nav--lifted > .md-nav__list > .md-nav__item--section > .md-nav__link,
[data-md-color-scheme="slate"] .md-nav--lifted > .md-nav__list > .md-nav__item--section > label.md-nav__link {
  color: var(--color-indigo-400, #818CF8);
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.18) 0%,
    transparent 60%);
}

[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav__link {
  color: var(--color-slate-300, #CBD5E1);
}

[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav__link:hover {
  background: rgba(99, 102, 241, 0.16);
  color: var(--color-indigo-200, #C7D2FE);
}

[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav__link--active,
[data-md-color-scheme="slate"] .md-sidebar--primary .md-nav__item--active > .md-nav__link {
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.28) 0%,
    rgba(139, 92, 246, 0.10) 60%,
    transparent 100%);
  color: var(--color-indigo-200, #C7D2FE);
}

/* =========================== Phase E12-D 끝 ============================== */

/* =============================================================================
   Phase E14-B — SCN ID 자동 hyperlink 시각 (사용자 "낯선 ID 표 친화" 호소)
   ============================================================================= */

a.scn-link {
  color: var(--color-indigo-600, #4F46E5);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dotted var(--color-indigo-400, #818CF8);
  padding: 0 1px;
  transition: color 0.15s var(--ease-out, ease), border-bottom-color 0.15s var(--ease-out, ease), background 0.15s;
  white-space: nowrap;
}

a.scn-link:hover {
  color: var(--color-indigo-700, #4338CA);
  border-bottom-color: var(--color-indigo-600, #4F46E5);
  background: var(--color-indigo-50, rgba(99, 102, 241, 0.06));
  border-radius: 3px;
}

a.scn-link:focus-visible {
  outline: 2px solid var(--color-indigo-500, #6366F1);
  outline-offset: 2px;
  border-radius: 3px;
}

/* 다크 모드 호환 */
[data-md-color-scheme="slate"] a.scn-link {
  color: var(--color-indigo-300, #A5B4FC);
  border-bottom-color: var(--color-indigo-400, #818CF8);
}

[data-md-color-scheme="slate"] a.scn-link:hover {
  color: var(--color-indigo-200, #C7D2FE);
  background: rgba(99, 102, 241, 0.16);
}

/* =========================== Phase E14-B 끝 ============================== */

/* =============================================================================
   Phase E16 — 본문 자동 생성 페이지 (generate.md)
   ============================================================================= */

.generate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

@media screen and (max-width: 60em) {
  .generate-grid {
    grid-template-columns: 1fr;
  }
}

.generate-form-col,
.generate-result-col {
  background: var(--md-default-bg-color);
  border: 1px solid var(--color-slate-200, #E2E8F0);
  border-radius: var(--radius-lg, 14px);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(15, 23, 42, 0.06));
}

.generate-form-col h3,
.generate-result-col h3 {
  margin-top: 0 !important;
  margin-bottom: 0.8em !important;
  font-size: 1.05rem;
  color: var(--color-indigo-700, #4338CA);
}

.form-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}

.form-fields label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-slate-700, #334155);
  margin-bottom: -0.3em;
}

.form-fields input {
  border: 1px solid var(--color-slate-300, #CBD5E1);
  border-radius: 8px;
  padding: 0.5em 0.75em;
  font-family: var(--md-text-font);
  font-size: 0.92rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  transition: border-color 0.15s var(--ease-out, ease), box-shadow 0.15s var(--ease-out, ease);
}

.form-fields input:focus {
  border-color: var(--color-indigo-500, #6366F1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.16);
  outline: none;
}

.form-fields input::placeholder {
  color: var(--color-slate-300, #CBD5E1);
  font-weight: 400;
}

.blk-controls,
.output-controls {
  display: flex;
  gap: 0.5rem;
  margin: 0.8em 0;
  flex-wrap: wrap;
}

.blk-controls button,
.output-controls button {
  padding: 0.5em 1em;
  border-radius: 6px;
  border: 1px solid var(--color-slate-300, #CBD5E1);
  background: var(--md-default-bg-color);
  color: var(--color-slate-700, #334155);
  font-family: var(--md-text-font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s var(--ease-out, ease);
}

.blk-controls button:hover,
.output-controls button:hover {
  background: var(--color-indigo-50, #EEF2FF);
  border-color: var(--color-indigo-400, #818CF8);
  color: var(--color-indigo-700, #4338CA);
}

.blk-controls button.primary {
  background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  color: white;
  border: 0;
  padding: 0.5em 1.5em;
}

.blk-controls button.primary:hover {
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.32);
  transform: translateY(-1px);
}

.blk-checklist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.4rem 1rem;
  margin: 1em 0;
  padding: 1rem;
  background: var(--color-slate-50, #F8FAFC);
  border-radius: 8px;
  border: 1px solid var(--color-slate-200, #E2E8F0);
}

.blk-checklist .blk-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.3em 0.5em;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.12s var(--ease-out, ease);
}

.blk-checklist .blk-item:hover {
  background: rgba(99, 102, 241, 0.06);
}

.blk-checklist .blk-item input {
  margin-top: 0.2em;
  accent-color: var(--color-indigo-500, #6366F1);
}

.blk-checklist .blk-item span {
  font-size: 0.85rem;
  color: var(--color-slate-700, #334155);
  line-height: 1.4;
}

#output {
  width: 100%;
  min-height: 380px;
  font-family: var(--md-code-font, monospace);
  font-size: 0.85rem;
  line-height: 1.6;
  border: 1px solid var(--color-slate-300, #CBD5E1);
  border-radius: 8px;
  padding: 1em;
  background: var(--color-slate-50, #F8FAFC);
  color: var(--md-default-fg-color);
  resize: vertical;
}

#output:focus {
  border-color: var(--color-indigo-500, #6366F1);
  outline: none;
}

.output-meta {
  margin-top: 0.6em;
  font-size: 0.78rem;
  color: var(--color-slate-500, #64748B);
}

.output-meta .warn {
  color: var(--color-amber-600, #D97706);
  font-weight: 600;
}

.error-message {
  margin: 1em 0;
  padding: 0.8em 1em;
  color: var(--color-rose-500, #F43F5E);
  font-size: 0.85rem;
}

.error-message:empty {
  display: none;
}

/* 다크 모드 */
[data-md-color-scheme="slate"] .generate-form-col,
[data-md-color-scheme="slate"] .generate-result-col {
  background: var(--color-slate-900, #0F172A);
  border-color: var(--color-slate-700, #334155);
}

[data-md-color-scheme="slate"] .form-fields input,
[data-md-color-scheme="slate"] #output {
  background: var(--color-slate-950, #020617);
  border-color: var(--color-slate-600, #475569);
  color: var(--color-slate-100, #F1F5F9);
}

[data-md-color-scheme="slate"] .blk-checklist {
  background: var(--color-slate-900, #0F172A);
  border-color: var(--color-slate-700, #334155);
}

.blk-controls button.primary.ai {
  background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
}

.blk-controls button.primary.ai:hover {
  background: linear-gradient(135deg, #059669 0%, #0891B2 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.32);
}

.ai-controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.6rem;
  align-items: center;
  margin: 1em 0;
  padding: 1rem;
  background: var(--color-slate-50, #F8FAFC);
  border-radius: 8px;
  border: 1px solid var(--color-slate-200, #E2E8F0);
}

.ai-controls label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-slate-700, #334155);
  white-space: nowrap;
}

.ai-controls input[type="password"] {
  border: 1px solid var(--color-slate-300, #CBD5E1);
  border-radius: 6px;
  padding: 0.5em 0.7em;
  font-family: var(--md-code-font, monospace);
  font-size: 0.85rem;
}

.ai-controls input[type="password"]:focus {
  border-color: var(--color-emerald-500, #10B981);
  outline: none;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.16);
}

.ai-controls button {
  padding: 0.5em 0.9em;
  border-radius: 6px;
  border: 1px solid var(--color-slate-300, #CBD5E1);
  background: var(--md-default-bg-color);
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
}

.ai-controls button:hover {
  border-color: var(--color-rose-500, #F43F5E);
  color: var(--color-rose-500, #F43F5E);
}

.ai-status {
  margin: 0.6em 0;
  padding: 0.5em 0.8em;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-slate-600, #475569);
  border-radius: 6px;
  min-height: 1.2em;
}

.ai-status:not(:empty) {
  background: var(--color-slate-50, #F8FAFC);
  border: 1px solid var(--color-slate-200, #E2E8F0);
}

[data-md-color-scheme="slate"] .ai-controls {
  background: var(--color-slate-900, #0F172A);
  border-color: var(--color-slate-700, #334155);
}

[data-md-color-scheme="slate"] .ai-controls input[type="password"] {
  background: var(--color-slate-950, #020617);
  border-color: var(--color-slate-600, #475569);
  color: var(--color-slate-100, #F1F5F9);
}

/* === Phase E16 Stage 3 — 4 모드 + 패키지 카드 + § 트리 + 검색 === */

.asset-stats {
  font-size: 0.85rem;
  color: var(--color-slate-500, #64748B);
  text-align: center;
  margin: 0.5em 0 1em;
  padding: 0.4em 0.8em;
  background: var(--color-indigo-50, #EEF2FF);
  border-radius: 6px;
  border: 1px solid var(--color-indigo-200, #C7D2FE);
}

.selected-count {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-indigo-600, #4F46E5);
  padding: 0.4em 0.8em;
  background: var(--color-indigo-50, #EEF2FF);
  border-radius: 6px;
}

/* 모드 탭 */
.generate-tabs {
  display: flex;
  gap: 0.4rem;
  margin: 1.5em 0 0.8em;
  flex-wrap: wrap;
}

.generate-tabs button {
  padding: 0.6em 1.2em;
  border: 1px solid var(--color-slate-300, #CBD5E1);
  background: var(--md-default-bg-color);
  color: var(--color-slate-700, #334155);
  border-radius: 8px;
  font-family: var(--md-text-font);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s var(--ease-out, ease);
}

.generate-tabs button:hover {
  border-color: var(--color-indigo-400, #818CF8);
  color: var(--color-indigo-700, #4338CA);
}

.generate-tabs button.active {
  background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  color: white;
  border-color: transparent;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.32);
}

/* 패키지 카드 (⚡ 빠른) */
.pkg-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1em 0;
}

.pkg-card {
  padding: 1.1rem;
  border: 1px solid var(--color-slate-200, #E2E8F0);
  border-radius: 12px;
  cursor: pointer;
  background: var(--md-default-bg-color);
  transition: all 0.18s var(--ease-out, ease);
}

.pkg-card:hover {
  border-color: var(--color-indigo-400, #818CF8);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md, 0 4px 6px -1px rgba(15, 23, 42, 0.08));
}

.pkg-card.selected {
  border-color: var(--color-indigo-500, #6366F1);
  background: var(--color-indigo-50, #EEF2FF);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.16);
}

.pkg-card-header {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-indigo-700, #4338CA);
  margin-bottom: 0.4em;
}

.pkg-card-sub {
  font-size: 0.8rem;
  color: var(--color-slate-600, #475569);
  margin-bottom: 0.6em;
}

.pkg-card-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-slate-500, #64748B);
  display: inline-block;
  padding: 0.2em 0.6em;
  background: var(--color-slate-100, #F1F5F9);
  border-radius: 4px;
}

/* § 트리 */
.section-tree {
  margin: 1em 0;
}

.section-group {
  border: 1px solid var(--color-slate-200, #E2E8F0);
  border-radius: 8px;
  margin-bottom: 0.5em;
  background: var(--md-default-bg-color);
  overflow: hidden;
}

.section-group summary {
  padding: 0.7em 1em;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-indigo-700, #4338CA);
  cursor: pointer;
  background: var(--color-slate-50, #F8FAFC);
  border-bottom: 1px solid transparent;
  list-style: none;
}

.section-group summary::before {
  content: "▶";
  display: inline-block;
  margin-right: 0.5em;
  font-size: 0.7em;
  transition: transform 0.15s;
  color: var(--color-indigo-500, #6366F1);
}

.section-group[open] summary::before {
  transform: rotate(90deg);
}

.section-group[open] summary {
  border-bottom-color: var(--color-slate-200, #E2E8F0);
}

.section-block-list {
  padding: 0.5em 1em;
  max-height: 360px;
  overflow-y: auto;
}

/* 카테고리 배지 */
.cat-badge {
  display: inline-block;
  padding: 0.1em 0.5em;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-right: 0.4em;
  letter-spacing: 0.04em;
}

.cat-badge.cat-track   { background: #E0E7FF; color: #4338CA; }
.cat-badge.cat-package { background: #FCE7F3; color: #BE185D; }
.cat-badge.cat-scenario { background: #FEF3C7; color: #B45309; }
.cat-badge.cat-guide   { background: #D1FAE5; color: #047857; }
.cat-badge.cat-module  { background: #E0F2FE; color: #0369A1; }

/* 블록 미리보기 */
.blk-preview {
  font-size: 0.78rem;
  color: var(--color-slate-500, #64748B);
  margin-top: 0.2em;
  padding-left: 0.3em;
  font-style: italic;
  line-height: 1.4;
}

/* 자유 검색 */
.search-input {
  width: 100%;
  padding: 0.7em 1em;
  border: 1px solid var(--color-slate-300, #CBD5E1);
  border-radius: 8px;
  font-family: var(--md-text-font);
  font-size: 0.95rem;
  background: var(--md-default-bg-color);
  margin-bottom: 1em;
}

.search-input:focus {
  border-color: var(--color-indigo-500, #6366F1);
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.16);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
}

.search-hint {
  padding: 0.5em 0;
  font-size: 0.85rem;
  color: var(--color-slate-500, #64748B);
  font-weight: 600;
}

/* 다크 모드 */
[data-md-color-scheme="slate"] .pkg-card {
  background: var(--color-slate-900, #0F172A);
  border-color: var(--color-slate-700, #334155);
}

[data-md-color-scheme="slate"] .pkg-card:hover,
[data-md-color-scheme="slate"] .pkg-card.selected {
  background: rgba(99, 102, 241, 0.10);
}

[data-md-color-scheme="slate"] .section-group {
  background: var(--color-slate-900, #0F172A);
  border-color: var(--color-slate-700, #334155);
}

[data-md-color-scheme="slate"] .section-group summary {
  background: var(--color-slate-800, #1E293B);
}

[data-md-color-scheme="slate"] .search-input {
  background: var(--color-slate-950, #020617);
  border-color: var(--color-slate-600, #475569);
}

/* =========================== Phase E16 Stage 3 끝 ============================== */

/* =============================================================================
   Domain knowledge guide hero — wide, plain-language overview
   ============================================================================= */

.md-typeset figure:has(img[src$="domain-knowledge.svg"]) {
  width: min(100%, 940px);
  margin: 1.1rem auto 1.6rem;
  text-align: center;
}

.md-typeset figure img[src$="domain-knowledge.svg"],
.md-typeset img[src$="domain-knowledge.svg"] {
  width: 100% !important;
  max-width: 900px !important;
  max-height: none !important;
  height: auto !important;
  display: block;
  margin-inline: auto;
}

@media screen and (max-width: 40em) {
  .md-typeset figure:has(img[src$="domain-knowledge.svg"]) {
    width: min(calc(100vw - 2rem), 340px);
    max-width: min(calc(100vw - 2rem), 340px);
    margin-left: 0;
    margin-right: auto;
    transform: none;
  }

  .md-typeset figure img[src$="domain-knowledge.svg"],
  .md-typeset img[src$="domain-knowledge.svg"] {
    width: min(calc(100vw - 2rem), 340px) !important;
    max-width: min(calc(100vw - 2rem), 340px) !important;
  }
}