:root {
  --bg: #faf9f7;
  --panel: #ffffff;
  --ink: #2b2a28;
  --ink-soft: #6b6862;
  --line: #e6e2da;
  --accent: #b7622e;
  --accent-soft: #fdf1e7;
  --hl: #ffe9a8;
  --hl-approx: #ffd6d6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Apple SD Gothic Neo", "Noto Sans KR", Pretendard, sans-serif;
}

body { display: flex; flex-direction: column; overflow: hidden; }

/* ---- 상단 바 ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}
.topbar-title { font-weight: 700; font-size: 15px; }
.topbar-actions { display: flex; gap: 8px; align-items: center; }

/* 상단 장 드롭다운 — 넓은 화면에선 왼쪽 내비가 있으므로 숨김 */
.chapter-select {
  display: none;
  font: inherit;
  font-size: 13px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  max-width: 200px;
}

button {
  font: inherit;
  font-size: 13px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}
button:hover { background: var(--bg); }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover { opacity: 0.9; }

/* ---- 3단 레이아웃 ---- */
.layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr) 340px;
  flex: 1;
  min-height: 0;
}

/* 왼쪽: 챕터 내비 */
.chapter-nav {
  overflow-y: auto;
  padding: 16px 10px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}
.nav-part {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
  margin: 16px 8px 4px;
}
.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--ink);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
}
.nav-item:hover { background: var(--bg); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-general { margin-bottom: 6px; border: 1px dashed var(--line); }
.nav-badge {
  flex-shrink: 0;
  min-width: 20px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border-radius: 10px;
  padding: 1px 6px;
}

/* 가운데: 읽기 패널 */
.reading-pane-wrap { overflow-y: auto; min-width: 0; }
.reading-pane {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 40px 120px;
  font-size: 17px;
  line-height: 1.9;
  word-break: keep-all;
}
.reading-pane h1 { font-size: 26px; margin: 4px 0 8px; line-height: 1.4; }
.reading-pane h2 { font-size: 19px; margin: 44px 0 12px; }
.reading-pane h2::before { content: "── "; color: var(--accent); }
.reading-pane p { margin: 0 0 1.1em; }
.ch-part { font-size: 13px; color: var(--accent); font-weight: 700; letter-spacing: 0.06em; margin: 0; }
.ch-intro {
  color: var(--ink-soft);
  font-size: 15px;
  border-left: 3px solid var(--line);
  padding-left: 14px;
  margin: 16px 0 36px;
}
.reading-pane hr { border: none; text-align: center; margin: 2em 0; }
.reading-pane hr::after { content: "⁂"; color: var(--ink-soft); }

/* 본문 하단 이전/다음 장 네비 */
.chapter-footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 40px 80px;
}
.chapter-footer-nav[hidden] { display: none; }
.footer-nav-btn {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  max-width: 48%;
  padding: 12px 16px;
  text-align: left;
  line-height: 1.4;
}
.footer-nav-btn:last-child { text-align: right; }
.fn-dir { font-size: 12px; color: var(--accent); font-weight: 700; }
.fn-title {
  font-size: 13.5px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 하이라이트 */
mark.comment-hl {
  background: var(--hl);
  padding: 1px 0;
  border-bottom: 2px solid #e8b93c;
  cursor: pointer;
}
mark.comment-hl.approx { background: var(--hl-approx); border-bottom-color: #e08787; }
mark.comment-hl:hover { filter: brightness(0.95); }
.flash { animation: flash-bg 1.6s ease; }
@keyframes flash-bg {
  0%, 40% { box-shadow: 0 0 0 3px var(--accent); }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* 오른쪽: 코멘트 사이드바 */
.comment-sidebar {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
  background: var(--panel);
  min-height: 0;
}
.sidebar-list { flex: 1; overflow-y: auto; padding: 16px 14px; }
.sidebar-empty { color: var(--ink-soft); font-size: 13.5px; line-height: 1.6; }
.sidebar-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-soft);
  margin: 18px 2px 8px;
}
.comment-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
  background: var(--bg);
  cursor: pointer;
}
.comment-card:hover { border-color: var(--accent); }
.comment-quote {
  font-size: 12.5px;
  color: var(--ink-soft);
  border-left: 3px solid var(--hl);
  padding-left: 8px;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.comment-text { font-size: 14px; line-height: 1.6; white-space: pre-wrap; }
.comment-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--ink-soft);
}
.comment-delete {
  font-size: 11.5px;
  padding: 2px 8px;
  color: var(--ink-soft);
  border-color: transparent;
  background: transparent;
}
.comment-delete:hover { color: #c0392b; background: transparent; }
.comment-badge {
  font-size: 11.5px;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
  display: inline-block;
}
.comment-badge.approx { background: var(--hl-approx); color: #8a3b3b; }
.comment-badge.orphan { background: #eee; color: var(--ink-soft); }

.sidebar-chapter-box {
  border-top: 1px solid var(--line);
  padding: 12px 14px;
  flex-shrink: 0;
}
.sidebar-chapter-box textarea {
  width: 100%;
  font: inherit;
  font-size: 13.5px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px;
  resize: vertical;
  margin-bottom: 8px;
}
.sidebar-chapter-box button { width: 100%; }

/* 코멘트 작성 폼 */
.comment-form {
  position: fixed;
  z-index: 60;
  left: 50%;
  top: 30%;
  transform: translateX(-50%);
  width: 420px;
  max-width: calc(100vw - 40px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.18);
  padding: 16px;
}
.comment-form-quote {
  font-size: 13px;
  color: var(--ink-soft);
  border-left: 3px solid var(--hl);
  padding-left: 10px;
  margin-bottom: 10px;
}
.comment-form textarea {
  width: 100%;
  font: inherit;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
  resize: vertical;
}
.comment-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 10px;
}

/* 접근 게이트 */
.gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}
/* hidden 속성이 display:flex를 이기도록 (UA 기본 display:none은 우선순위가 낮음) */
.gate-overlay[hidden] { display: none; }
.gate-box {
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 36px 44px;
}
.gate-box h2 { margin: 0 0 6px; }
.gate-box p { color: var(--ink-soft); font-size: 14px; }
.gate-box input {
  display: block;
  width: 220px;
  margin: 14px auto 10px;
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-align: center;
}
.gate-error { color: #c0392b; }

/* 좁은 화면: 내비를 접고 2단으로 */
@media (max-width: 1080px) {
  .layout { grid-template-columns: minmax(0, 1fr) 300px; }
  .chapter-nav { display: none; }
  /* 왼쪽 내비가 접히므로 상단 드롭다운으로 장 이동 */
  .chapter-select { display: block; }
}