/* ============================================================
   EduFlow - MkDocs Material Custom Theme v3
   모든 테마 색상은 CSS 변수를 통해 동적으로 적용됩니다.
   43개 디자인 개선 항목 통합
   ============================================================ */

/* --- CSS 변수 (기본값: 인디고 테마) --- */
:root {
  /* 기본 테마색 */
  --ef-primary: #4f46e5;
  --ef-primary-dark: #4338ca;
  --ef-primary-light: #eef2ff;
  --ef-primary-lighter: #f5f3ff;
  --ef-accent: #7c3aed;
  --ef-primary-text: #312e81;
  --ef-primary-border: #c7d2fe;
  --ef-primary-deep: #1e1b4b;
  --ef-primary-deep-mid: #312e81;
  --ef-code-border: #e0e7ff;
  --ef-footer-link: #a5b4fc;
  --ef-footer-link-hover: #c7d2fe;

  /* 보조 색상 */
  --ef-success: #10b981;
  --ef-warning: #f59e0b;
  --ef-error: #ef4444;
  --ef-info: #0ea5e9;
  --ef-amber: #f59e0b;
  --ef-emerald: #10b981;
  --ef-rose: #f43f5e;
  --ef-sky: #0ea5e9;

  /* 그레이 스케일 */
  --ef-gray-50: #f9fafb;
  --ef-gray-100: #f3f4f6;
  --ef-gray-200: #e5e7eb;
  --ef-gray-300: #d1d5db;
  --ef-gray-400: #9ca3af;
  --ef-gray-500: #6b7280;
  --ef-gray-600: #4b5563;
  --ef-gray-700: #374151;
  --ef-gray-800: #1f2937;
  --ef-gray-900: #111827;

  /* UI 기본 */
  --ef-bg: #fafafa;
  --ef-card-bg: #ffffff;
  --ef-border: #e5e7eb;
  --ef-text: #1f2937;
  --ef-text-muted: #6b7280;
  --ef-radius: 14px;

  /* 그림자 시스템 */
  --ef-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --ef-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --ef-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --ef-shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
  --ef-shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* --- 다크모드 --- */
[data-md-color-scheme="slate"] {
  --ef-bg: #1e1e2e;
  --ef-card-bg: #2a2a3e;
  --ef-border: #3a3a4e;
  --ef-text: #e8eef7;
  --ef-text-muted: #94a3b8;
  --ef-primary-light: var(--ef-primary-deep-mid);
  --ef-primary-lighter: var(--ef-primary-deep);
  --ef-primary-text: var(--ef-footer-link);
  --ef-gray-50: #2a2a3e;
  --ef-gray-100: #3a3a4e;
  --ef-gray-700: #cbd5e1;
  --ef-gray-800: #e2e8f0;
  --ef-gray-900: #f1f5f9;
}

/* ============================================================
   전체 본문
   ============================================================ */
.md-content__inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   접근성 - 포커스 스타일
   ============================================================ */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--ef-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ============================================================
   헤더 (네비게이션 바)
   ============================================================ */
.md-header {
  background: linear-gradient(135deg, var(--ef-primary), var(--ef-accent)) !important;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.md-header__title {
  cursor: pointer;
}
.md-header__title:hover .md-header__topic:first-child {
  opacity: 0.85;
}
.md-header__topic:first-child {
  position: static !important;
  transform: none !important;
  opacity: 1 !important;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.md-header__topic + .md-header__topic {
  display: none !important;
}

.md-tabs {
  background: color-mix(in srgb, var(--ef-primary) 92%, transparent) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.md-tabs__link--active {
  font-weight: 600;
}

/* ============================================================
   타이포그래피 - 글꼴 크기 계층
   ============================================================ */
.md-typeset h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--ef-text);
  margin-top: 0;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--ef-primary), var(--ef-accent)) 1;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.md-typeset h2 {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--ef-text);
  margin-top: 3rem;
  padding: 0.6rem 0 0.5rem 1rem;
  border-left: 4px solid var(--ef-primary);
  border-bottom: none;
  background: linear-gradient(90deg, var(--ef-primary-light) 0%, transparent 100%);
  border-radius: 0 8px 8px 0;
  line-height: 1.35;
}

.md-typeset h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--ef-gray-700);
  margin-top: 2rem;
  padding-left: 0.8rem;
  border-left: 3px solid var(--ef-accent);
  line-height: 1.4;
}

[data-md-color-scheme="slate"] .md-typeset h3 {
  color: var(--ef-primary-text);
}

.md-typeset h4 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ef-text-muted);
  margin-top: 1.5rem;
}

.md-typeset p {
  font-size: 1.05rem;
  line-height: 2.0;
  color: var(--ef-gray-700);
  word-break: keep-all;
}

[data-md-color-scheme="slate"] .md-typeset p {
  color: #cbd5e1;
}

/* 이모지 헤딩 간격 */
.md-typeset h1 .twemoji,
.md-typeset h2 .twemoji,
.md-typeset h3 .twemoji {
  margin-right: 0.5rem;
  width: 1.2em;
  height: 1.2em;
  vertical-align: -0.15em;
}

/* ============================================================
   인용문 (blockquote) - 하이라이트 카드
   ============================================================ */
.md-typeset blockquote {
  border-left: 4px solid var(--ef-accent);
  background: linear-gradient(135deg, var(--ef-primary-lighter) 0%, var(--ef-primary-light) 100%);
  padding: 1.2rem 1.5rem;
  border-radius: 0 var(--ef-radius) var(--ef-radius) 0;
  margin: 1.8rem 0;
  color: var(--ef-primary-text);
  box-shadow: var(--ef-shadow-sm);
  position: relative;
}

.md-typeset blockquote::before {
  content: '\201C';
  position: absolute;
  top: -8px;
  left: 12px;
  font-size: 2.5rem;
  color: var(--ef-accent);
  opacity: 0.3;
  font-family: Georgia, serif;
}

.md-typeset blockquote p {
  color: var(--ef-primary-text);
  font-style: italic;
}

[data-md-color-scheme="slate"] .md-typeset blockquote {
  background: linear-gradient(135deg, var(--ef-primary-deep) 0%, var(--ef-primary-deep-mid) 100%);
  color: var(--ef-primary-text);
}

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

/* ============================================================
   코드 블록
   ============================================================ */
.md-typeset pre {
  border-radius: var(--ef-radius);
  border: 1px solid var(--ef-border);
  box-shadow: var(--ef-shadow-sm);
  margin: 1.5rem 0;
  overflow: hidden;
  background: #1e293b;
}

.md-typeset .highlight {
  background: transparent;
  border-radius: var(--ef-radius);
}

.md-typeset .highlight pre {
  background: #1e293b;
}

/* 코드 블록 제목 (파일명 헤더) */
.md-typeset .highlight .filename {
  background: #0f172a;
  color: #94a3b8;
  padding: 0.6rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-bottom: 1px solid #334155;
  letter-spacing: 0.02em;
}

.md-typeset code {
  border-radius: 6px;
  padding: 0.2em 0.45em;
  font-size: 0.87em;
  background: var(--ef-primary-light);
  color: var(--ef-accent);
  border: 1px solid var(--ef-code-border);
  font-weight: 500;
}

.md-typeset pre code {
  background: none;
  color: #e2e8f0;
  border: none;
  padding: 0;
  font-weight: normal;
}

/* 라이트모드에서도 코드 블록은 다크 배경 */
.md-typeset .highlight pre code {
  color: #e2e8f0;
}

[data-md-color-scheme="slate"] .md-typeset pre {
  background: #0f172a !important;
  border-color: #1e293b;
}

[data-md-color-scheme="slate"] .md-typeset .highlight pre {
  background: #0f172a;
}

[data-md-color-scheme="slate"] .md-typeset .highlight .filename {
  background: #020617;
  border-bottom-color: #1e293b;
}

[data-md-color-scheme="slate"] .md-typeset code {
  background: #1e293b;
  color: var(--ef-primary-text);
  border-color: #334155;
}

.md-clipboard {
  color: #64748b !important;
}
.md-clipboard:hover {
  color: #e2e8f0 !important;
}

/* Pygments 구문 강조 — 다크 테마 (라이트/다크 모드 공통) */
.highlight .hll { background-color: #334155; }
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .ch { color: #b0b8c4; font-style: italic; }  /* 주석 */
.highlight .k, .highlight .kn, .highlight .kd, .highlight .kp, .highlight .kr { color: #c084fc; font-weight: 600; }  /* 키워드 */
.highlight .nb, .highlight .bp { color: #22d3ee; }  /* 내장 함수 */
.highlight .nf, .highlight .fm { color: #34d399; }  /* 함수명 */
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sa, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sr, .highlight .ss { color: #fbbf24; }  /* 문자열 */
.highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .mb, .highlight .il { color: #f97316; }  /* 숫자 */
.highlight .o, .highlight .ow { color: #f472b6; }  /* 연산자 */
.highlight .n, .highlight .na, .highlight .nc, .highlight .nd, .highlight .ni, .highlight .ne, .highlight .nl, .highlight .nn, .highlight .no, .highlight .nt, .highlight .nv { color: #e2e8f0; }  /* 일반 이름 */
.highlight .p { color: #94a3b8; }  /* 구두점 */
.highlight .nc { color: #38bdf8; font-weight: 600; }  /* 클래스명 */
.highlight .nd { color: #a78bfa; }  /* 데코레이터 */
.highlight .err { color: #f87171; }  /* 에러 */

/* ============================================================
   체크리스트 (학습 목표) - 교육 최적화
   ============================================================ */
.md-typeset .task-list-item {
  list-style: none;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.6rem;
  background: var(--ef-gray-50);
  border-radius: 8px;
  transition: background 0.2s ease;
}

.md-typeset .task-list-item:hover {
  background: linear-gradient(135deg, var(--ef-primary-light), var(--ef-card-bg));
}

.md-typeset [type="checkbox"] {
  accent-color: var(--ef-primary);
  width: 1.2em;
  height: 1.2em;
  margin-right: 0.6em;
  vertical-align: -0.15em;
  cursor: pointer;
}

.md-typeset [type="checkbox"]:checked + span,
.md-typeset [type="checkbox"]:checked ~ * {
  color: var(--ef-emerald);
}

/* ============================================================
   어드모니션 (admonition) — 카드 스타일
   ============================================================ */
.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--ef-radius) !important;
  border: 1px solid var(--ef-border) !important;
  box-shadow: var(--ef-shadow-sm);
  margin: 1.8rem 0;
  overflow: hidden;
  transition: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.md-typeset .admonition:hover,
.md-typeset details:hover {
  box-shadow: var(--ef-shadow-md);
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-weight: 600;
  border-radius: 0 !important;
  letter-spacing: -0.01em;
}

.md-typeset .admonition.info {
  border-color: var(--ef-info) !important;
}

.md-typeset .admonition.tip {
  border-color: var(--ef-success) !important;
}

.md-typeset .admonition.warning {
  border-color: var(--ef-warning) !important;
}

.md-typeset .admonition.danger {
  border-color: var(--ef-error) !important;
}

/* ============================================================
   Details/Summary (접기/펼치기) - 애니메이션 개선
   ============================================================ */
.md-typeset details {
  background: var(--ef-card-bg);
}

.md-typeset details summary {
  padding: 0.9rem 1.2rem;
  cursor: pointer;
  user-select: none;
  background: linear-gradient(135deg, var(--ef-gray-50), var(--ef-gray-100));
  border-bottom: 1px solid var(--ef-border);
  font-weight: 600;
  color: var(--ef-text);
  transition: background 0.2s ease, color 0.2s ease;
}

.md-typeset details summary::marker {
  color: var(--ef-primary);
}

.md-typeset details summary:hover {
  background: linear-gradient(135deg, var(--ef-primary-light), var(--ef-primary-lighter));
  color: var(--ef-primary);
}

.md-typeset details[open] summary {
  background: linear-gradient(135deg, var(--ef-primary-light), var(--ef-primary-lighter));
  color: var(--ef-primary);
  border-bottom-color: var(--ef-primary-border);
}

.md-typeset details[open] {
  box-shadow: var(--ef-shadow-md);
}

.md-typeset details > *:not(summary) {
  padding: 0 1.2rem;
}

/* ============================================================
   탭 콘텐츠 (pymdownx.tabbed)
   ============================================================ */
.md-typeset .tabbed-set {
  border-radius: var(--ef-radius);
  overflow: hidden;
  border: 1px solid var(--ef-border);
  margin: 1.8rem 0;
  box-shadow: var(--ef-shadow-sm);
}

.md-typeset .tabbed-labels {
  background: var(--ef-gray-50);
  border-bottom: 2px solid var(--ef-border);
}

.md-typeset .tabbed-labels > label {
  font-weight: 600;
  color: var(--ef-text-muted);
  padding: 0.8rem 1.2rem;
  transition: color 0.2s ease;
}

.md-typeset .tabbed-labels > label:hover {
  color: var(--ef-primary);
}

.md-typeset .tabbed-labels > label--active,
.md-typeset .tabbed-set > input:checked + label {
  color: var(--ef-primary);
  border-bottom: 2px solid var(--ef-primary);
}

.md-typeset .tabbed-content {
  padding: 1.2rem;
}

/* ============================================================
   테이블
   ============================================================ */
.md-typeset table:not([class]) {
  border-radius: var(--ef-radius);
  overflow: hidden;
  border: 1px solid var(--ef-border);
  box-shadow: var(--ef-shadow-sm);
  margin: 1.8rem 0;
  width: 100%;
}

.md-typeset table:not([class]) thead {
  background: linear-gradient(135deg, var(--ef-primary-light), var(--ef-primary-lighter));
}

.md-typeset table:not([class]) th {
  color: var(--ef-primary-text);
  font-weight: 600;
  padding: 0.9rem 1.1rem;
  border-bottom: 2px solid var(--ef-primary-border);
  letter-spacing: -0.01em;
}

.md-typeset table:not([class]) td {
  padding: 0.75rem 1.1rem;
  border-bottom: 1px solid var(--ef-gray-100);
}

.md-typeset table:not([class]) tbody tr {
  transition: background 0.15s ease;
}

.md-typeset table:not([class]) tbody tr:hover {
  background: var(--ef-gray-50);
}

.md-typeset table:not([class]) tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================================
   용어 정의 (Definition List)
   ============================================================ */
.md-typeset dl {
  background: var(--ef-gray-50);
  padding: 1.2rem 1.5rem;
  border-radius: var(--ef-radius);
  border-left: 4px solid var(--ef-accent);
  margin: 1.5rem 0;
}

.md-typeset dt {
  font-weight: 700;
  color: var(--ef-primary);
  margin-top: 1rem;
  margin-bottom: 0.3rem;
}

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

.md-typeset dd {
  margin-left: 0;
  color: var(--ef-text-muted);
  line-height: 1.8;
  padding-left: 1rem;
  border-left: 2px solid var(--ef-border);
}

/* ============================================================
   각주 (Footnotes)
   ============================================================ */
.md-typeset .footnote {
  font-size: 0.9rem;
  border-top: 2px solid var(--ef-border);
  margin-top: 3rem;
  padding-top: 1.5rem;
}

.md-typeset .footnote-ref {
  color: var(--ef-primary);
  font-weight: 600;
}

.md-typeset .footnote-backref {
  color: var(--ef-accent);
}

/* ============================================================
   약어 (Abbreviations)
   ============================================================ */
.md-typeset abbr {
  border-bottom: 2px dotted var(--ef-primary);
  cursor: help;
  text-decoration: none;
}

/* ============================================================
   목록
   ============================================================ */
.md-typeset ul li,
.md-typeset ol li {
  margin-bottom: 0.35rem;
  line-height: 1.9;
}

.md-typeset ol > li::marker {
  color: var(--ef-primary);
  font-weight: 700;
}

/* ============================================================
   구분선
   ============================================================ */
.md-typeset hr {
  border: none;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--ef-border), transparent);
  margin: 3rem 0;
}

/* ============================================================
   Mermaid 다이어그램
   ============================================================ */
.mermaid {
  background: linear-gradient(135deg, var(--ef-gray-50), var(--ef-primary-lighter));
  border-radius: var(--ef-radius);
  padding: 2.5rem 1.5rem;
  border: 1px solid var(--ef-code-border);
  margin: 2.5rem 0;
  text-align: center;
  box-shadow: var(--ef-shadow-sm);
}

[data-md-color-scheme="slate"] .mermaid {
  background: linear-gradient(135deg, #1a1a2e, #2a2a3e);
  border-color: #4a4a5e;
}

/* ============================================================
   강조 텍스트
   ============================================================ */
.md-typeset strong {
  color: var(--ef-gray-900);
  font-weight: 700;
}

[data-md-color-scheme="slate"] .md-typeset strong {
  color: #f1f5f9;
}

.md-typeset mark {
  background: linear-gradient(120deg, #fef08a 0%, #fde68a 100%);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

/* ============================================================
   이미지
   ============================================================ */
.md-typeset img {
  border-radius: var(--ef-radius);
  box-shadow: var(--ef-shadow-md);
  margin: 1.5rem 0;
  transition: box-shadow 0.2s ease;
}

.md-typeset img:hover {
  box-shadow: var(--ef-shadow-lg);
}

/* 다크모드 이미지 필터 */
[data-md-color-scheme="slate"] .md-typeset img {
  filter: brightness(0.9) contrast(1.1);
}

/* ============================================================
   사이드바
   ============================================================ */
.md-nav__link--active {
  color: var(--ef-primary) !important;
  font-weight: 600;
}

.md-nav__item--nested > .md-nav__link {
  font-weight: 600;
  color: var(--ef-primary) !important;
}

/* ============================================================
   검색
   ============================================================ */
.md-search__input {
  border-radius: 10px !important;
}

/* ============================================================
   하단 네비게이션 (이전/다음)
   ============================================================ */
.md-footer {
  background: linear-gradient(135deg, var(--ef-primary-deep), var(--ef-primary-deep-mid)) !important;
}

.md-footer-nav__link {
  transition: all 0.2s ease;
}
.md-footer-nav__link:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.md-footer-meta {
  background: rgba(0, 0, 0, 0.2) !important;
  padding: 1rem;
}

.md-footer-meta a {
  color: var(--ef-footer-link) !important;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}
.md-footer-meta a:hover {
  color: var(--ef-footer-link-hover) !important;
  text-decoration: underline;
}

/* ============================================================
   스크롤바
   ============================================================ */
.md-sidebar__scrollwrap::-webkit-scrollbar {
  width: 4px;
}
.md-sidebar__scrollwrap::-webkit-scrollbar-thumb {
  background: var(--ef-gray-300);
  border-radius: 4px;
}
.md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover {
  background: var(--ef-gray-400);
}

/* ============================================================
   인덱스 페이지
   ============================================================ */
.md-typeset h1 + p {
  font-size: 1.1rem;
  color: var(--ef-text-muted);
  line-height: 1.7;
}

.md-typeset h3 + ul a {
  color: var(--ef-primary);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s ease;
}

.md-typeset h3 + ul a:hover {
  color: var(--ef-accent);
  text-decoration: underline;
}

/* ============================================================
   스텝/단계별 가이드
   ============================================================ */
.md-typeset h3[id^="step"] {
  background: linear-gradient(90deg, #fef3c7 0%, transparent 100%);
  padding: 0.5rem 0.8rem;
  border-left: 4px solid var(--ef-amber);
  border-radius: 0 8px 8px 0;
}

/* ============================================================
   스크롤 프로그레스 바 (JS에서 생성)
   ============================================================ */
.ef-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ef-primary), var(--ef-accent));
  z-index: 9999;
  transition: width 0.1s ease;
  pointer-events: none;
}

/* ============================================================
   반응형 - 태블릿
   ============================================================ */
@media (max-width: 768px) {
  .md-content__inner {
    padding: 1.2rem 1rem;
  }
  .md-typeset h1 {
    font-size: 1.8rem;
  }
  .md-typeset h2 {
    font-size: 1.4rem;
    padding: 0.5rem 0 0.4rem 0.8rem;
  }
  .md-typeset h3 {
    font-size: 1.15rem;
  }
  .md-typeset blockquote {
    padding: 1rem;
  }
  .md-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .md-tabs__link {
    white-space: nowrap;
    min-width: fit-content;
  }
  /* 터치 타겟 최소 48px */
  .md-nav__link {
    padding: 0.75rem 1rem !important;
  }
  .md-typeset [type="checkbox"] {
    width: 1.4em;
    height: 1.4em;
  }
}

/* ============================================================
   반응형 - 모바일
   ============================================================ */
@media (max-width: 480px) {
  .md-typeset h1 {
    font-size: 1.5rem;
  }
  .md-typeset h2 {
    font-size: 1.2rem;
  }
  .md-typeset h3 {
    font-size: 1.05rem;
  }
  .md-content__inner {
    padding: 1rem 0.75rem;
  }
  .md-typeset p {
    font-size: 0.95rem;
  }
  .md-search__input {
    padding: 0.8rem !important;
  }
}

/* ============================================================
   인쇄 스타일
   ============================================================ */
@media print {
  @page {
    size: A4;
    margin: 2cm;
  }

  .md-header,
  .md-tabs,
  .md-sidebar,
  .md-footer,
  .ef-scroll-progress,
  .md-search {
    display: none !important;
  }

  .md-content__inner {
    max-width: 100%;
    padding: 0;
    animation: none;
  }

  /* 타이포그래피 */
  .md-typeset h1 {
    border-image: none;
    border-bottom: 2px solid #333;
    font-size: 2rem;
  }

  .md-typeset h2 {
    background: none;
    border-left: 3px solid #333;
    padding-left: 0.5rem;
    page-break-before: auto;
    page-break-after: avoid;
    margin-top: 2rem;
  }

  .md-typeset h3 {
    page-break-after: avoid;
  }

  /* 페이지 나누기 규칙 */
  .md-typeset blockquote,
  .md-typeset .admonition,
  .md-typeset details,
  .md-typeset table,
  .mermaid {
    page-break-inside: avoid;
  }

  .md-typeset img {
    max-width: 100%;
    page-break-inside: avoid;
    box-shadow: none;
    filter: none;
  }

  /* 링크 URL 표시 */
  .md-typeset a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
    word-break: break-all;
  }

  .md-typeset a[href^="#"]:after,
  .md-typeset a[href$=".md"]:after {
    content: "";
  }

  /* 테이블 */
  .md-typeset table:not([class]) {
    box-shadow: none;
    border: 1px solid #999;
  }

  .md-typeset table:not([class]) thead {
    background: #f3f4f6 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .md-typeset table:not([class]) th {
    color: #000;
    border-bottom: 2px solid #333;
  }

  .md-typeset table:not([class]) td {
    border-bottom: 1px solid #ccc;
  }

  /* 인용문 */
  .md-typeset blockquote {
    background: #f5f5f5 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    color: #333;
    border-left-color: #666;
  }

  .md-typeset blockquote p {
    color: #333;
  }

  .md-typeset blockquote::before {
    display: none;
  }

  /* Mermaid */
  .mermaid {
    background: white !important;
    border: 1px solid #ccc;
    box-shadow: none;
  }

  .mermaid svg {
    max-width: 100%;
    height: auto;
  }

  /* 코드 블록 */
  .md-typeset pre {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .md-typeset code {
    background: #f5f5f5 !important;
    color: #333;
    border-color: #ccc;
  }

  /* 어드모니션 */
  .md-typeset .admonition,
  .md-typeset details {
    box-shadow: none;
    border: 1px solid #999 !important;
  }
}

/* ============================================================
   애니메이션
   ============================================================ */
.md-content__inner {
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============================================
   회로도 다이어그램 (circuit-diagrams.js 연동)
   ============================================= */
.hw-diagram {
  margin: 1.5rem 0;
  padding: 0;
  border-radius: 12px;
  overflow: hidden;
  background: var(--md-code-bg-color, #1e293b);
}

.hw-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.hw-diagram .hw-title {
  padding: 0.75rem 1rem 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--md-default-fg-color--light, #94a3b8);
  letter-spacing: 0.02em;
}

.hw-diagram .hw-notes {
  padding: 0.5rem 1rem 0.75rem;
  font-size: 0.8rem;
  color: var(--md-default-fg-color--lighter, #64748b);
  line-height: 1.6;
}

.hw-diagram .hw-notes li {
  margin-bottom: 0.25rem;
}

.hw-diagram .hw-notes li::marker {
  content: "⚠ ";
}

/* 호버 효과 & 툴팁 */
.hw-diagram [data-pin]:hover {
  cursor: pointer;
}

.hw-diagram .hw-tooltip {
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.hw-diagram .hw-tooltip.visible {
  opacity: 1;
}

/* 강조 핀 pulse 애니메이션 */
@keyframes hw-pulse {
  0%, 100% { opacity: 0.6; r: 8; }
  50% { opacity: 0.2; r: 14; }
}

.hw-diagram .highlight-pulse {
  animation: hw-pulse 2s ease-in-out infinite;
}

/* 다크모드 대응 */
[data-md-color-scheme="slate"] .hw-diagram {
  background: #0f172a;
}

/* 인쇄 시 */
@media print {
  .hw-diagram {
    break-inside: avoid;
    border: 1px solid #e2e8f0;
  }
  .hw-diagram .highlight-pulse {
    animation: none;
    opacity: 0.4;
  }
}

/* ============================================================
   SVG 다이어그램 (인라인 SVG 시각 자료)
   ============================================================ */
.svg-diagram {
  text-align: center;
  margin: 1.5em 0;
  overflow-x: auto;
}

.svg-diagram svg {
  max-width: 100%;
  height: auto;
}

/* 다크모드 대응 */
[data-md-color-scheme="slate"] .svg-diagram svg text {
  fill: #e0e0e0;
}

[data-md-color-scheme="slate"] .svg-diagram svg rect,
[data-md-color-scheme="slate"] .svg-diagram svg circle {
  stroke: #e0e0e0;
}

[data-md-color-scheme="slate"] .svg-diagram svg line,
[data-md-color-scheme="slate"] .svg-diagram svg path {
  stroke: #b0b0b0;
}

[data-md-color-scheme="slate"] .svg-diagram svg marker path {
  fill: #b0b0b0;
}

@media print {
  .svg-diagram {
    break-inside: avoid;
  }
}

/* ============================================================
   AI 리터러시 교재 컴포넌트 (Starlight 스타일 재현)
   md_in_html 확장 기반: <div class="..." markdown> 패턴
   ============================================================ */

/* --- 수업 배너 (lesson-banner) --- */
.lesson-banner {
  background: linear-gradient(135deg, var(--ef-primary-light) 0%, var(--ef-primary-lighter) 100%);
  border: 1px solid color-mix(in srgb, var(--ef-primary) 20%, transparent);
  border-radius: var(--ef-radius);
  padding: 1.5rem 2rem;
  margin: 0 0 2rem 0;
}

.lesson-banner > p:first-child {
  font-size: 0.92rem;
  color: var(--ef-text-muted);
  margin-bottom: 0.5rem;
}

.lesson-banner > p:first-child strong {
  color: var(--ef-primary-text);
}

.lesson-banner > blockquote {
  background: var(--ef-card-bg) !important;
  border-left: 4px solid var(--ef-accent) !important;
  border-radius: 0 8px 8px 0 !important;
  margin: 0.75rem 0 0 0 !important;
  padding: 0.75rem 1rem !important;
  box-shadow: var(--ef-shadow-sm);
}

.lesson-banner > blockquote::before {
  display: none !important;
}

[data-md-color-scheme="slate"] .lesson-banner {
  background: linear-gradient(135deg, color-mix(in srgb, var(--ef-primary) 15%, #1a1a2e) 0%, color-mix(in srgb, var(--ef-accent) 10%, #2a2a3e) 100%);
  border-color: var(--ef-border);
}

/* --- 카드 그리드 (cards-grid + card) --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--ef-card-bg);
  border: 1px solid var(--ef-border);
  border-radius: var(--ef-radius);
  padding: 1.25rem 1.5rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: var(--ef-shadow-hover);
  transform: translateY(-2px);
}

.card h3, .card h4 {
  margin-top: 0 !important;
  padding: 0 !important;
  border: none !important;
  background: none !important;
  font-size: 1.1rem !important;
  line-height: 1.4 !important;
}

.card > p:last-child {
  margin-bottom: 0;
  color: var(--ef-text-muted);
  font-size: 0.95rem;
}

/* 카드 색상 변형 — 상단 보더 */
.card-orange { border-top: 3px solid #f59e0b; }
.card-green  { border-top: 3px solid #10b981; }
.card-blue   { border-top: 3px solid #3b82f6; }
.card-red    { border-top: 3px solid #ef4444; }
.card-purple { border-top: 3px solid #8b5cf6; }

.card-orange h3, .card-orange h4 { color: #b45309 !important; }
.card-green h3,  .card-green h4  { color: #047857 !important; }
.card-blue h3,   .card-blue h4   { color: #1d4ed8 !important; }
.card-red h3,    .card-red h4    { color: #b91c1c !important; }
.card-purple h3, .card-purple h4 { color: #6d28d9 !important; }

[data-md-color-scheme="slate"] .card-orange h3,
[data-md-color-scheme="slate"] .card-orange h4 { color: #fbbf24 !important; }
[data-md-color-scheme="slate"] .card-green h3,
[data-md-color-scheme="slate"] .card-green h4  { color: #34d399 !important; }
[data-md-color-scheme="slate"] .card-blue h3,
[data-md-color-scheme="slate"] .card-blue h4   { color: #60a5fa !important; }
[data-md-color-scheme="slate"] .card-red h3,
[data-md-color-scheme="slate"] .card-red h4    { color: #f87171 !important; }
[data-md-color-scheme="slate"] .card-purple h3,
[data-md-color-scheme="slate"] .card-purple h4 { color: #a78bfa !important; }

[data-md-color-scheme="slate"] .card {
  background: var(--ef-card-bg);
  border-color: var(--ef-border);
}

/* --- Steps 컴포넌트 (steps + step) --- */
.steps {
  margin: 1.5rem 0;
  padding-left: 0;
  counter-reset: step-counter;
}

.step {
  position: relative;
  padding-left: 3rem;
  padding-bottom: 1.5rem;
  border-left: 2px solid color-mix(in srgb, var(--ef-primary) 30%, transparent);
  margin-left: 0.85rem;
  counter-increment: step-counter;
}

.step:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.step::before {
  content: counter(step-counter);
  position: absolute;
  left: -0.85rem;
  top: 0;
  width: 1.7rem;
  height: 1.7rem;
  background: var(--ef-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
  z-index: 1;
}

.step h4 {
  margin-top: 0 !important;
  padding: 0 !important;
  border: none !important;
  background: none !important;
  font-size: 1.05rem !important;
  color: var(--ef-primary-text) !important;
}

[data-md-color-scheme="slate"] .step {
  border-left-color: color-mix(in srgb, var(--ef-primary) 25%, transparent);
}

[data-md-color-scheme="slate"] .step::before {
  background: var(--ef-accent);
}

/* --- 링크 카드 (link-cards + link-card) --- */
.link-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.link-card {
  background: var(--ef-card-bg);
  border: 1px solid var(--ef-border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
  border-color: var(--ef-primary);
  box-shadow: var(--ef-shadow-md);
}

.link-card h4 {
  margin: 0 0 0.25rem 0 !important;
  padding: 0 !important;
  border: none !important;
  background: none !important;
  color: var(--ef-primary) !important;
  font-size: 1rem !important;
}

.link-card > p:last-child {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ef-text-muted);
  line-height: 1.5;
}

[data-md-color-scheme="slate"] .link-card {
  background: var(--ef-card-bg);
  border-color: var(--ef-border);
}

/* --- 평가 섹션 (assessment) --- */
.assessment {
  background: var(--ef-gray-50);
  border: 1px solid var(--ef-border);
  border-radius: var(--ef-radius);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
}

.assessment h3 {
  margin-top: 0 !important;
  border: none !important;
  background: none !important;
  padding: 0 !important;
  color: var(--ef-primary-text) !important;
}

.assessment details {
  margin: 0.5rem 0 1.5rem 0;
}

.assessment details summary {
  cursor: pointer;
  color: var(--ef-primary);
  font-weight: 600;
  font-size: 0.9rem;
}

[data-md-color-scheme="slate"] .assessment {
  background: color-mix(in srgb, var(--ef-card-bg) 80%, transparent);
}

/* --- AI 리터러시 컴포넌트 반응형 --- */
@media (max-width: 768px) {
  .lesson-banner {
    padding: 1rem 1.25rem;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .step {
    padding-left: 2.5rem;
  }
  .link-cards {
    grid-template-columns: 1fr;
  }
  .assessment {
    padding: 1rem 1.25rem;
  }
}

/* --- AI 리터러시 컴포넌트 인쇄 --- */
@media print {
  .lesson-banner {
    background: #f5f3ff !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    break-inside: avoid;
  }
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .card {
    box-shadow: none;
    border: 1px solid #d1d5db;
  }
  .card:hover {
    transform: none;
  }
  .step::before {
    background: #4f46e5 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .assessment {
    background: #f9fafb !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    break-inside: avoid;
  }
}

/* ============================================================
   발행 정보 푸터 (자연스러운 소형 푸터)
   ============================================================ */
.publish-footer {
  text-align: center;
  font-size: 0.75rem;
  color: #9ca3af;
  line-height: 1.8;
  padding: 0.5rem 0;
}

.publish-footer a {
  color: #9ca3af;
  text-decoration: none;
  border-bottom: 1px dotted #d1d5db;
  transition: color 0.2s;
}

.publish-footer a:hover {
  color: #6b7280;
}

[data-md-color-scheme="slate"] .publish-footer {
  color: #6b7280;
}

[data-md-color-scheme="slate"] .publish-footer a {
  color: #6b7280;
  border-bottom-color: #4b5563;
}

[data-md-color-scheme="slate"] .publish-footer a:hover {
  color: #9ca3af;
}

/* ============================================================
   EduFlow 퀴즈 엔진 (assessment_level 4)
   ============================================================ */
.ef-quiz {
  border: 1px solid var(--ef-primary-border, #c7d2fe);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--ef-primary-lighter, #f5f3ff);
}
.ef-quiz-question {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--ef-primary-text, #312e81);
}
.ef-quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.ef-quiz-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: white;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.9rem;
}
.ef-quiz-option:hover {
  border-color: var(--ef-primary, #4f46e5);
  background: var(--ef-primary-light, #eef2ff);
}
.ef-quiz-option input[type="radio"] {
  accent-color: var(--ef-primary, #4f46e5);
}
.ef-quiz-option.correct {
  border-color: #22c55e;
  background: #f0fdf4;
}
.ef-quiz-option.correct::after {
  content: '\2714';
  margin-left: auto;
  color: #22c55e;
  font-weight: bold;
}
.ef-quiz-option.wrong {
  border-color: #ef4444;
  background: #fef2f2;
}
.ef-quiz-option.wrong::after {
  content: '\2718';
  margin-left: auto;
  color: #ef4444;
  font-weight: bold;
}
.ef-quiz-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.ef-quiz-check, .ef-quiz-retry, .ef-quiz-summary-btn {
  padding: 0.5rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.ef-quiz-check {
  background: var(--ef-primary, #4f46e5);
  color: white;
}
.ef-quiz-check:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.ef-quiz-check:not(:disabled):hover {
  filter: brightness(1.1);
}
.ef-quiz-retry {
  background: #f1f5f9;
  color: #475569;
}
.ef-quiz-retry:hover {
  background: #e2e8f0;
}
.ef-quiz-feedback {
  display: none;
  margin-top: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
}
.ef-quiz-feedback.show { display: block; }
.ef-quiz-feedback.is-correct {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}
.ef-quiz-feedback.is-wrong {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}
.ef-quiz-summary-btn {
  display: block;
  margin: 1.5rem auto;
  background: var(--ef-primary, #4f46e5);
  color: white;
}
.ef-quiz-summary-btn:hover {
  filter: brightness(1.1);
}
/* 다크 모드 */
[data-md-color-scheme="slate"] .ef-quiz {
  background: #1e293b;
  border-color: #334155;
}
[data-md-color-scheme="slate"] .ef-quiz-question {
  color: var(--ef-primary-text, #c4b5fd);
}
[data-md-color-scheme="slate"] .ef-quiz-option {
  background: #0f172a;
  border-color: #334155;
  color: #e2e8f0;
}
[data-md-color-scheme="slate"] .ef-quiz-option:hover {
  background: #1e293b;
}
[data-md-color-scheme="slate"] .ef-quiz-option.correct {
  background: #052e16;
  border-color: #22c55e;
}
[data-md-color-scheme="slate"] .ef-quiz-option.wrong {
  background: #450a0a;
  border-color: #ef4444;
}
[data-md-color-scheme="slate"] .ef-quiz-feedback.is-correct {
  background: #052e16;
  color: #86efac;
  border-color: #166534;
}
[data-md-color-scheme="slate"] .ef-quiz-feedback.is-wrong {
  background: #450a0a;
  color: #fca5a5;
  border-color: #991b1b;
}
[data-md-color-scheme="slate"] .ef-quiz-retry {
  background: #334155;
  color: #e2e8f0;
}

/* ============================================================
   사이드바 토글 + 챕터 네비게이션
   ============================================================ */

/* 사이드바 토글 버튼 */
.ef-sidebar-toggle {
  position: fixed;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  z-index: 100;
  width: 24px;
  height: 48px;
  border-radius: 0 8px 8px 0;
  background: var(--md-primary-fg-color, #4051b5);
  color: white;
  border: none;
  box-shadow: 2px 0 8px rgba(0,0,0,0.15);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, left 0.3s;
  opacity: 0.7;
}
.ef-sidebar-toggle:hover {
  background: var(--md-primary-fg-color--dark, #303fa1);
  opacity: 1;
}
.ef-sidebar-toggle.is-collapsed {
  left: 0;
}
.ef-sidebar-toggle.is-collapsed svg {
  transform: rotate(180deg);
}

/* 사이드바 접힌 상태 */
.ef-sidebar-collapsed .md-sidebar--primary {
  width: 0 !important;
  min-width: 0 !important;
  overflow: hidden;
  opacity: 0;
  transition: width 0.3s, opacity 0.2s;
}
.md-sidebar--primary {
  transition: width 0.3s, opacity 0.2s;
}

/* MkDocs 기본 footer nav 숨김 (커스텀 네비게이션 사용) */
.md-footer__inner,
nav.md-footer__inner,
.md-footer .md-footer__inner {
  display: none !important;
}

/* 챕터 네비게이션 */
.ef-chapter-nav {
  display: flex;
  gap: 16px;
  margin: 48px 0 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(0,0,0,0.08);
}
.ef-chapter-nav__btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  border-radius: 14px;
  background: #f8f9fa;
  text-decoration: none !important;
  color: #374151 !important;
  transition: all 0.25s ease;
  border: 1px solid #e5e7eb;
}
.ef-chapter-nav__btn:hover {
  background: #f0f4ff;
  border-color: #93a3f8;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.12);
  color: #4338ca !important;
}
.ef-chapter-nav__next {
  justify-content: flex-end;
  text-align: right;
}
.ef-chapter-nav__arrow {
  font-size: 1.4rem;
  font-weight: 300;
  color: #9ca3af;
  transition: color 0.2s, transform 0.2s;
}
.ef-chapter-nav__btn:hover .ef-chapter-nav__arrow {
  color: #6366f1;
}
.ef-chapter-nav__prev:hover .ef-chapter-nav__arrow {
  transform: translateX(-4px);
}
.ef-chapter-nav__next:hover .ef-chapter-nav__arrow {
  transform: translateX(4px);
}
.ef-chapter-nav__info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.ef-chapter-nav__dir {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9ca3af;
  font-weight: 600;
}
.ef-chapter-nav__title {
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.35;
  color: inherit;
}

/* 다크모드 네비게이션 */
[data-md-color-scheme="slate"] .ef-chapter-nav {
  border-top-color: rgba(255,255,255,0.08);
}
[data-md-color-scheme="slate"] .ef-chapter-nav__btn {
  background: #1e293b;
  border-color: #334155;
  color: #e2e8f0 !important;
}
[data-md-color-scheme="slate"] .ef-chapter-nav__btn:hover {
  background: #1e1b4b;
  border-color: #6366f1;
  box-shadow: 0 6px 20px rgba(99,102,241,0.2);
  color: #a5b4fc !important;
}
[data-md-color-scheme="slate"] .ef-chapter-nav__arrow {
  color: #64748b;
}
[data-md-color-scheme="slate"] .ef-chapter-nav__btn:hover .ef-chapter-nav__arrow {
  color: #818cf8;
}
[data-md-color-scheme="slate"] .ef-chapter-nav__dir {
  color: #64748b;
}

/* 모바일에서 사이드바 토글 숨김 */
@media (max-width: 76.1875em) {
  .ef-sidebar-toggle { display: none; }
}
/* 모바일 네비게이션 스택 */
@media (max-width: 600px) {
  .ef-chapter-nav { flex-direction: column; gap: 8px; }
  .ef-chapter-nav__next { text-align: left; justify-content: flex-start; }
}

/* ============================================================
   이미지 & Mermaid 라이트박스
   ============================================================ */
.md-content img:not(.twemoji):not(.emojione):not(.mermaid img) {
  cursor: zoom-in;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.md-content img:not(.twemoji):not(.emojione):not(.mermaid img):hover {
  transform: scale(1.02);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}
.mermaid svg { cursor: zoom-in; }
.mermaid:has(svg):hover { box-shadow: 0 4px 20px rgba(0,0,0,0.1); border-radius: 8px; }

.ef-lightbox {
  position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.92); z-index: 9999;
  display: none; align-items: center; justify-content: center;
  flex-direction: column;
  cursor: zoom-out; opacity: 0; transition: opacity 0.3s ease;
}
.ef-lightbox.active { opacity: 1; }
.ef-lightbox-body { display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; }
.ef-lightbox-body > img {
  max-width: 92vw; max-height: 88vh;
  object-fit: contain; border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  transform: scale(0.9); transition: transform 0.3s ease;
}
.ef-lightbox.active .ef-lightbox-body > img { transform: scale(1); }
.ef-lightbox-body .ef-svg-wrapper {
  background: #fff; border-radius: 16px; padding: 1.5rem 2rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  width: 94vw; max-height: 90vh; overflow: auto;
  display: flex; align-items: center; justify-content: center;
  transform: scale(0.9); transition: transform 0.3s ease;
}
.ef-lightbox.active .ef-svg-wrapper { transform: scale(1); }
.ef-lightbox-body .ef-svg-wrapper svg {
  width: 100% !important; height: auto !important;
  max-height: 84vh; min-width: 88vw;
}
.ef-lightbox-caption {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.85); font-size: 0.95rem; text-align: center;
  max-width: 80vw; padding: 8px 20px;
  background: rgba(0,0,0,0.5); border-radius: 8px;
}
.ef-lightbox-close {
  position: absolute; top: 20px; right: 28px;
  color: #fff; font-size: 2rem; cursor: pointer;
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; background: rgba(255,255,255,0.1);
  transition: background 0.2s; z-index: 10000;
}
.ef-lightbox-close:hover { background: rgba(255,255,255,0.25); }

/* === Color Theme Override: blue === */
:root {
  --ef-primary: #2563eb;
  --ef-primary-dark: #1d4ed8;
  --ef-primary-light: #eff6ff;
  --ef-primary-lighter: #f0f9ff;
  --ef-accent: #0ea5e9;
  --ef-primary-text: #1e3a5f;
  --ef-primary-border: #bfdbfe;
  --ef-primary-deep: #172554;
  --ef-primary-deep-mid: #1e3a5f;
  --ef-code-border: #dbeafe;
  --ef-footer-link: #93c5fd;
  --ef-footer-link-hover: #bfdbfe;
}
[data-md-color-scheme="slate"] {
  --ef-primary-text: #93c5fd;
}