/* ============================================================
   클로드 코드 토큰 절약 가이드 — 슬라이드 스타일시트
   뷰포트 맞춤형, 스크롤 없는 프레젠테이션 설계
   ============================================================ */

/* ── 커스텀 속성 (라이트 테마) ── */
:root {
  --bg-primary: #f5f0eb;
  --bg-page: #fdfbf8;
  --text-primary: #2c2c2c;
  --text-secondary: #5a5a5a;
  --text-muted: #888;
  --accent: #d4622b;
  --accent-light: #f0ddd0;
  --accent-dark: #b8491a;
  --code-bg: #1e1e2e;
  --code-text: #cdd6f4;
  --code-comment: #6c7086;
  --code-header-bg: #313244;
  --info-bg: #eef4fb;
  --info-border: #4a90d9;
  --warning-bg: #fef6e6;
  --warning-border: #e8a838;
  --divider: #d4cfc8;
  --shadow-soft: 0 2px 20px rgba(0,0,0,0.06);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.08);
  --page-max-width: 860px;
  --nav-height: 52px;
  --font-body: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
  --font-size-base: 16px;
  --line-height: 1.7;
  --letter-spacing: -0.01em;
}

/* ── 다크 테마 ── */
[data-theme="dark"] {
  --bg-primary: #1a1a2e;
  --bg-page: #1e1e32;
  --text-primary: #e0ddd5;
  --text-secondary: #a8a4a0;
  --text-muted: #6b6b6b;
  --accent: #e8864a;
  --accent-light: #3a2a1e;
  --accent-dark: #f0a060;
  --code-bg: #11111b;
  --code-text: #cdd6f4;
  --code-comment: #585b70;
  --code-header-bg: #181825;
  --info-bg: #1a2332;
  --info-border: #5a9ae6;
  --warning-bg: #2a2210;
  --warning-border: #d4a030;
  --divider: #3a3a50;
  --shadow-soft: 0 2px 20px rgba(0,0,0,0.3);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
}

/* ── 리셋 & 기본 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: var(--font-size-base); scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height);
  letter-spacing: var(--letter-spacing);
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── 진행률 표시바 ── */
.progress-bar { position: fixed; top: 0; left: 0; width: 100%; height: 3px; background: var(--divider); z-index: 1000; }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent-dark)); transition: width 0.4s ease; border-radius: 0 2px 2px 0; }

/* ── 컨트롤 바 ── */
.controls-bar {
  position: fixed; top: 3px; left: 0; right: 0; height: var(--nav-height);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.2rem; background: var(--bg-page);
  border-bottom: 1px solid var(--divider); z-index: 900;
  backdrop-filter: blur(10px);
}
.controls-right { display: flex; gap: 0.3rem; align-items: center; }
.control-btn {
  background: none; border: 1px solid transparent; color: var(--text-secondary);
  cursor: pointer; padding: 0.4rem 0.6rem; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 600; transition: all 0.2s; font-family: var(--font-body);
}
.control-btn:hover { background: var(--accent-light); color: var(--accent); }
.page-indicator { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); letter-spacing: 0.05em; }

/* ── 목차 사이드바 ── */
.toc-sidebar {
  position: fixed; top: 0; left: -320px; width: 300px; height: 100vh;
  background: var(--bg-page); border-right: 1px solid var(--divider);
  z-index: 1100; padding: 1.5rem; transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto; box-shadow: var(--shadow-card);
}
.toc-sidebar.open { left: 0; }
.toc-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 2px solid var(--accent); }
.toc-header h2 { font-size: 1.1rem; font-weight: 700; color: var(--accent); }
.toc-close { background: none; border: none; font-size: 1.6rem; cursor: pointer; color: var(--text-muted); line-height: 1; padding: 0.2rem; }
.toc-close:hover { color: var(--accent); }
.toc-list { list-style: none; }
.toc-list li { margin-bottom: 0.3rem; }
.toc-link { display: block; padding: 0.6rem 0.8rem; color: var(--text-primary); text-decoration: none; border-radius: 8px; font-size: 0.9rem; transition: all 0.2s; }
.toc-link:hover { background: var(--accent-light); color: var(--accent); }
.toc-link.active { background: var(--accent); color: #fff; font-weight: 600; }
.toc-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 1050; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.toc-overlay.show { opacity: 1; pointer-events: auto; }

/* ── 책 컨테이너 ── */
.book-container { position: relative; width: 100%; height: calc(100vh - var(--nav-height) - 3px); margin-top: calc(var(--nav-height) + 3px); overflow: hidden; }

/* ── 슬라이드 페이지 공통 (스크롤 없음!) ── */
.page {
  position: absolute; inset: 0; display: flex; justify-content: center; align-items: center;
  overflow: hidden; padding: 1.5rem 1rem; opacity: 0; transform: translateX(60px);
  pointer-events: none; transition: opacity 0.5s ease, transform 0.5s ease;
}
.page.active { opacity: 1; transform: translateX(0); pointer-events: auto; }
.page.exit-left { opacity: 0; transform: translateX(-60px); }
.page.exit-right { opacity: 0; transform: translateX(60px); }
.page-inner {
  width: 100%; max-width: var(--page-max-width); background: var(--bg-page);
  border-radius: 12px; padding: 2rem 2.5rem; box-shadow: var(--shadow-card);
  max-height: calc(100vh - var(--nav-height) - 3px - 3rem);
  overflow: hidden; position: relative;
  display: flex; flex-direction: column;
}

/* ── 표지 페이지 ── */
.page-cover { align-items: center; }
.cover-content { text-align: center; max-width: 560px; padding: 1.5rem 2rem; }
.cover-decoration { display: flex; align-items: center; justify-content: center; gap: 1rem; margin: 1rem 0; }
.cover-line { flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent); max-width: 120px; }
.cover-diamond { color: var(--accent); font-size: 1rem; }
.cover-subtitle-top { font-size: 0.85rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.8rem; font-weight: 500; }
.cover-title { font-size: 2.4rem; font-weight: 800; line-height: 1.2; color: var(--text-primary); margin-bottom: 0.3rem; }
.cover-title-accent { color: var(--accent); display: block; font-size: 1.8rem; margin-top: 0.3rem; }
.cover-img-wrapper { margin: 1.2rem auto; max-width: 320px; }
.cover-image { width: 100%; border-radius: 12px; box-shadow: var(--shadow-card); }
.cover-description { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.8; margin: 0.8rem 0; }
.cover-author { font-size: 0.9rem; color: var(--text-muted); font-weight: 600; letter-spacing: 0.1em; margin-top: 0.3rem; }

/* ── 챕터 헤더 ── */
.chapter-header { text-align: center; margin-bottom: 1rem; flex-shrink: 0; }
.chapter-label {
  display: inline-block; font-size: 0.72rem; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin-bottom: 0.3rem; padding: 0.2rem 0.8rem;
  border: 1px solid var(--accent); border-radius: 20px;
}
.chapter-title { font-size: 1.5rem; font-weight: 800; margin-top: 0.5rem; color: var(--text-primary); line-height: 1.3; }
.chapter-divider { margin-top: 0.5rem; }
.divider-ornament { color: var(--accent); font-size: 1rem; }

/* ── 챕터 이미지 ── */
.chapter-image-wrapper { margin: 0 auto 0.8rem; max-width: 380px; text-align: center; flex-shrink: 0; }
.chapter-image { width: 100%; border-radius: 10px; box-shadow: var(--shadow-soft); }

/* ── 본문 텍스트 ── */
.body-text { max-width: 42em; margin: 0 auto; flex: 1; overflow: hidden; }
.body-text p { margin-bottom: 0.7em; color: var(--text-primary); font-size: 0.9rem; }
.body-text h3 { font-size: 1.05rem; font-weight: 700; margin-top: 0.8rem; margin-bottom: 0.4rem; color: var(--text-primary); padding-bottom: 0.3rem; border-bottom: 2px solid var(--accent-light); }
.body-text h4 { font-size: 0.92rem; font-weight: 700; margin-bottom: 0.3rem; color: var(--text-primary); }

/* ── 드롭캡 ── */
.drop-cap::first-letter { float: left; font-size: 3em; line-height: 0.8; font-weight: 800; color: var(--accent); margin-right: 0.08em; margin-top: 0.05em; }

/* ── 인포 박스 ── */
.info-box { background: var(--info-bg); border-left: 4px solid var(--info-border); border-radius: 0 10px 10px 0; padding: 0.7rem 1rem; margin: 0.6rem 0; }
.info-box-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.3rem; font-size: 0.85rem; }
.info-icon { font-size: 1rem; }
.info-box-body p { font-size: 0.82rem; margin-bottom: 0.3em; color: var(--text-secondary); }
.info-box-body p:last-child { margin-bottom: 0; }
.highlight-box { border-left-color: var(--accent); background: var(--accent-light); }

/* ── 경고 박스 ── */
.warning-box { display: flex; gap: 0.8rem; background: var(--warning-bg); border-left: 4px solid var(--warning-border); border-radius: 0 10px 10px 0; padding: 0.7rem 1rem; margin: 0.6rem 0; }
.warning-icon { font-size: 1.1rem; flex-shrink: 0; }
.warning-content { font-size: 0.82rem; }
.warning-content strong { display: block; margin-bottom: 0.2rem; }
.warning-content p { color: var(--text-secondary); margin-bottom: 0; }

/* ── 인용구 ── */
.styled-quote { position: relative; margin: 0.8rem 0; padding: 0.8rem 1rem 0.8rem 1.5rem; background: var(--accent-light); border-radius: 10px; border-left: 4px solid var(--accent); }
.styled-quote::before { content: '\201C'; position: absolute; top: -0.2rem; left: 0.5rem; font-size: 2.5rem; color: var(--accent); opacity: 0.3; line-height: 1; }
.styled-quote p { font-style: italic; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0; }

/* ── 코드 블록 ── */
.code-block { border-radius: 10px; overflow: hidden; margin: 0.5rem 0; box-shadow: var(--shadow-soft); }
.code-header { background: var(--code-header-bg); padding: 0.35rem 1rem; display: flex; align-items: center; }
.code-label { font-size: 0.7rem; color: #a6adc8; font-weight: 600; letter-spacing: 0.03em; font-family: var(--font-mono); }
.code-block pre { background: var(--code-bg); padding: 0.6rem 1rem; overflow-x: auto; margin: 0; }
.code-block code { font-family: var(--font-mono); font-size: 0.78rem; color: var(--code-text); line-height: 1.6; }
.code-block pre code { background: none; color: var(--code-text); padding: 0; border-radius: 0; font-size: 0.78rem; }
.code-comment { color: var(--code-comment); font-style: italic; }
code { font-family: var(--font-mono); background: var(--accent-light); color: var(--accent); padding: 0.12em 0.35em; border-radius: 4px; font-size: 0.85em; }

/* ── 테이블 ── */
.command-table { margin: 0.6rem 0; overflow-x: auto; }
.command-table table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.command-table th { background: var(--accent); color: #fff; padding: 0.45rem 0.7rem; text-align: left; font-weight: 600; font-size: 0.75rem; letter-spacing: 0.03em; }
.command-table th:first-child { border-radius: 8px 0 0 0; }
.command-table th:last-child { border-radius: 0 8px 0 0; }
.command-table td { padding: 0.4rem 0.7rem; border-bottom: 1px solid var(--divider); color: var(--text-primary); }
.command-table tr:last-child td { border-bottom: none; }
.command-table tr:nth-child(even) td { background: rgba(0,0,0,0.02); }
[data-theme="dark"] .command-table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

/* ── 스텝 박스 ── */
.step-box { display: flex; gap: 0.7rem; margin: 0.5rem 0; align-items: flex-start; }
.step-number { flex-shrink: 0; width: 28px; height: 28px; background: var(--accent); color: #fff; font-weight: 800; font-size: 0.8rem; display: flex; align-items: center; justify-content: center; border-radius: 50%; margin-top: 0.1rem; }
.step-content { flex: 1; }
.step-content p { font-size: 0.85rem; }

/* ── 워크플로우 스텝 ── */
.workflow-step { display: flex; gap: 1rem; margin: 0.5rem 0; padding: 0.7rem 1rem; background: var(--bg-primary); border-radius: 10px; align-items: flex-start; }
.workflow-number { flex-shrink: 0; font-size: 1.3rem; font-weight: 800; color: var(--accent); opacity: 0.5; line-height: 1; min-width: 32px; }
.workflow-content { flex: 1; }
.workflow-content p { font-size: 0.82rem; }

/* ── 목차 페이지 전용 ── */
.toc-main-list { list-style: none; }
.toc-item { margin-bottom: 0.3rem; }
.toc-page-link { display: flex; align-items: center; gap: 0.8rem; padding: 0.65rem 1rem; text-decoration: none; color: var(--text-primary); border-radius: 10px; transition: all 0.2s; }
.toc-page-link:hover { background: var(--accent-light); }
.toc-chapter-num { font-size: 1.3rem; font-weight: 800; color: var(--accent); opacity: 0.4; min-width: 36px; }
.toc-chapter-info { flex: 1; }
.toc-chapter-title { display: block; font-weight: 700; font-size: 0.92rem; margin-bottom: 0.1rem; }
.toc-chapter-desc { display: block; font-size: 0.75rem; color: var(--text-muted); }
.toc-dots { flex: 1; border-bottom: 2px dotted var(--divider); min-width: 20px; margin: 0 0.2rem; align-self: flex-end; margin-bottom: 0.4rem; }
.toc-page-num { font-size: 0.85rem; font-weight: 700; color: var(--accent); min-width: 20px; text-align: right; }

/* ── 페이지 푸터 ── */
.page-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 0.5rem; border-top: 1px solid var(--divider); font-size: 0.72rem; color: var(--text-muted); flex-shrink: 0; }

/* ── 마무리 장식 ── */
.ending-decoration { text-align: center; margin-top: 1rem; padding-top: 0.8rem; border-top: 1px solid var(--divider); }
.ending-decoration > span { color: var(--accent); font-size: 1.2rem; letter-spacing: 0.5em; }
.ending-text { margin-top: 0.5rem; font-size: 0.9rem; color: var(--text-secondary); }
.ending-author { font-weight: 700; color: var(--accent); margin-top: 0.2rem; font-size: 0.85rem; }

/* ── 네비게이션 버튼 ── */
.nav-btn {
  position: fixed; top: 50%; transform: translateY(-50%); width: 48px; height: 48px;
  border: none; border-radius: 50%; background: var(--bg-page); color: var(--text-secondary);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-card); z-index: 800; transition: all 0.25s;
}
.nav-btn:hover { background: var(--accent); color: #fff; transform: translateY(-50%) scale(1.1); }
.nav-btn:disabled { opacity: 0.2; cursor: default; pointer-events: none; }
.nav-prev { left: 1rem; }
.nav-next { right: 1rem; }

/* ── 슬라이드 전용: 2컬럼 레이아웃 ── */
.slide-two-col { display: flex; gap: 1.5rem; align-items: flex-start; flex: 1; overflow: hidden; }
.slide-col-left { flex: 1; min-width: 0; }
.slide-col-right { flex: 1; min-width: 0; }

/* ── 슬라이드 전용: 큰 텍스트 ── */
.slide-big-text { font-size: 1.05rem; line-height: 1.7; color: var(--text-primary); margin-bottom: 0.7rem; }

/* ── VS 비교 레이아웃 ── */
.vs-compare { display: flex; gap: 1rem; margin: 0.6rem 0; }
.vs-box { flex: 1; padding: 0.7rem; border-radius: 10px; }
.vs-bad { background: #fdeaea; border: 1px solid #e57373; }
.vs-good { background: #e8f5e9; border: 1px solid #66bb6a; }
[data-theme="dark"] .vs-bad { background: #2d1a1a; border-color: #c62828; }
[data-theme="dark"] .vs-good { background: #1a2d1a; border-color: #2e7d32; }
.vs-label { font-size: 0.75rem; font-weight: 700; margin-bottom: 0.3rem; }
.vs-bad .vs-label { color: #c62828; }
.vs-good .vs-label { color: #2e7d32; }
[data-theme="dark"] .vs-bad .vs-label { color: #ef9a9a; }
[data-theme="dark"] .vs-good .vs-label { color: #a5d6a7; }
.vs-box p { font-size: 0.78rem; margin-bottom: 0; }

/* ── 반응형: 태블릿 ── */
@media (max-width: 768px) {
  :root { --font-size-base: 14px; }
  .page-inner { padding: 1.5rem 1.2rem; }
  .cover-title { font-size: 1.8rem; }
  .cover-title-accent { font-size: 1.4rem; }
  .chapter-title { font-size: 1.2rem; }
  .nav-btn { width: 40px; height: 40px; }
  .nav-prev { left: 0.5rem; }
  .nav-next { right: 0.5rem; }
  .slide-two-col { flex-direction: column; gap: 0.8rem; }
  .vs-compare { flex-direction: column; }
}

/* ── 반응형: 모바일 ── */
@media (max-width: 480px) {
  :root { --font-size-base: 13px; }
  .page-inner { padding: 1rem 0.8rem; }
  .cover-title { font-size: 1.5rem; }
  .cover-title-accent { font-size: 1.1rem; }
  .chapter-title { font-size: 1.1rem; }
  .nav-btn { width: 36px; height: 36px; bottom: 1rem; top: auto; transform: none; }
  .nav-btn:hover { transform: scale(1.1); }
  .nav-prev { left: 1rem; }
  .nav-next { right: 1rem; }
  .controls-bar { padding: 0 0.8rem; }
  .step-box, .workflow-step { flex-direction: column; gap: 0.3rem; }
  .drop-cap::first-letter { font-size: 2.2em; }
  .page { padding: 0.5rem; }
}

/* ── 폰트 크기 조절 ── */
body.font-small { --font-size-base: 13px; }
body.font-large { --font-size-base: 18px; }
body.font-xlarge { --font-size-base: 20px; }

/* ── 스크롤바 숨기기 ── */
.page::-webkit-scrollbar { display: none; }

/* ── 인쇄 ── */
@media print {
  .controls-bar, .progress-bar, .nav-btn, .toc-sidebar, .toc-overlay { display: none !important; }
  .page { position: relative; opacity: 1; transform: none; pointer-events: auto; page-break-after: always; overflow: visible; }
  .book-container { height: auto; overflow: visible; margin-top: 0; }
  body { overflow: visible; height: auto; }
}