/* 읽기: 긴 글을 편하게 읽는 리더북 화면. 한 줄 34자 안팎, 넉넉한 행간, 명조 본문과 고딕 제목 */
body[data-mode="cards"] .reader { display: none; }
body[data-mode="read"] #cards { display: none; }

.reader {
  --r-size: 18px;
  --r-serif: "AppleMyungjo", "Noto Serif KR", "Nanum Myeongjo", "Batang", "바탕", serif;
  max-width: 1180px;
  margin: 0 auto;
}

/* 서재 */
.lib-top { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-bottom: 18px; }
.lib-top h1 { font-size: 1.35rem; margin: 0; font-weight: 700; letter-spacing: -.01em; }
.continue { display: flex; align-items: center; gap: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; text-decoration: none; color: inherit; }
.continue:hover { border-color: var(--accent); }
.c-k { font-size: .75rem; color: var(--accent); font-weight: 700; white-space: nowrap; }
.c-t { flex: 1; font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.c-p { font-family: var(--f-mono); color: var(--muted); font-size: .85rem; }
.shelf h2 { font-size: .78rem; letter-spacing: .06em; color: var(--muted); margin: 30px 0 10px; font-weight: 600; }
.books { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.book { display: flex; flex-direction: column; gap: 8px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 16px 14px; text-decoration: none; color: inherit; min-height: 150px; }
.book:hover { border-color: var(--accent); }
.b-label { font-family: var(--f-mono); font-size: .78rem; color: var(--accent); font-weight: 600; }
.book.done .b-label::after { content: "  ✓"; }
.b-title { font-family: var(--r-serif); font-size: 1.08rem; font-weight: 600; line-height: 1.45; flex: 1; word-break: keep-all; }
.b-meta { font-size: .78rem; color: var(--muted); }
.b-bar { height: 3px; background: var(--line); border-radius: 2px; overflow: hidden; }
.b-bar i { display: block; height: 100%; background: var(--accent); }
.r-empty { padding: 60px 0; text-align: center; color: var(--muted); }

/* 본문 상단 막대 */
.rbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 8px;
  margin: calc(-1 * max(20px, env(safe-area-inset-top))) calc(-1 * max(16px, env(safe-area-inset-right))) 0 calc(-1 * max(16px, env(safe-area-inset-left)));
  padding: max(10px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 10px max(16px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(12px); backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.rb-back { text-decoration: none; color: var(--accent); font-weight: 600; white-space: nowrap; }
.rb-title { flex: 1; min-width: 0; text-align: center; font-size: .85rem; color: var(--muted); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.rb-btn { border: 1px solid var(--line); background: var(--chip); border-radius: 8px; padding: 4px 11px; font-size: .85rem; cursor: pointer; }
.rb-btn small { font-size: .7em; }
.rprog { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; }
.rprog i { display: block; height: 100%; width: 0; background: var(--accent); }

.aa-pop { position: fixed; z-index: 21; top: calc(max(10px, env(safe-area-inset-top)) + 48px); right: max(16px, env(safe-area-inset-right)); background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 12px 32px rgba(0, 0, 0, .16); padding: 12px 14px; display: flex; flex-direction: column; gap: 12px; min-width: 250px; }
.aa-pop[hidden] { display: none; }
.aa-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: .88rem; }
.aa-ctl { display: inline-flex; align-items: center; gap: 8px; }
.aa-ctl b { font-family: var(--f-mono); min-width: 2ch; text-align: center; }
.aa-ctl .btn { padding: 4px 10px; }

/* 본문 */
.r-layout { display: grid; grid-template-columns: minmax(0, 1fr); justify-items: center; }
.prose {
  width: 100%; max-width: 34em;
  padding: 36px 2px 48px;
  font-family: var(--r-serif); font-size: var(--r-size); line-height: 1.9;
  color: var(--ink); word-break: keep-all; overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}
.reader.sans .prose { font-family: var(--f-body); line-height: 1.8; }
.prose h1, .prose h2, .prose h3 { font-family: var(--f-body); letter-spacing: -.015em; scroll-margin-top: 76px; }
.prose h1 { font-size: 1.7em; line-height: 1.3; margin: 0 0 .35em; }
.prose .byline { font-family: var(--f-body); color: var(--muted); font-size: .78em; margin: 0 0 2.4em; }
.prose h2 { font-size: 1.3em; line-height: 1.4; margin: 2.6em 0 .9em; padding-top: 1em; border-top: 1px solid var(--line); }
.prose h3 { font-size: 1.06em; line-height: 1.5; margin: 2em 0 .6em; color: var(--accent); }
.prose p { margin: 0 0 1.1em; }
.prose strong { font-weight: 700; }
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.3em; }
.prose li { margin: .4em 0; padding-left: .15em; }
.prose li > p { margin: 0; }
.prose blockquote { margin: 1.6em 0; padding: .1em 0 .1em 1.1em; border-left: 3px solid var(--accent); color: var(--muted); }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose .math { margin: 1.3em 0; padding: .3em 0; overflow-x: auto; overflow-y: hidden; font-size: .95em; }
.prose pre.code { font-family: var(--f-mono); font-size: .78em; line-height: 1.6; background: var(--chip); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow-x: auto; white-space: pre; }
.prose img { display: block; max-width: 100%; height: auto; margin: 1.8em auto; border-radius: 8px; background: #fff; }
.prose a { color: var(--accent); }
.table-wrap { margin: 1.5em 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.prose table { width: 100%; border-collapse: collapse; font-family: var(--f-body); font-size: .8em; line-height: 1.6; }
.prose th { background: var(--chip); text-align: left; font-weight: 600; white-space: nowrap; }
.prose th, .prose td { padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose tr:last-child td { border-bottom: 0; }
.prose td p, .prose th p { margin: 0 0 .4em; }
.prose td p:last-child, .prose th p:last-child { margin: 0; }

/* 목차: 좁은 화면에서는 버튼으로 여는 판, 넓은 화면에서는 왼쪽에 고정 */
.toc { display: none; }
.toc-title { font-size: .72rem; letter-spacing: .06em; color: var(--muted); font-weight: 600; margin: 0 0 6px 8px; }
.toc a { display: block; text-decoration: none; color: var(--ink); font-size: .86rem; line-height: 1.45; padding: 5px 8px; border-radius: 6px; }
.toc a:hover { background: var(--chip); }
.toc a.toc-h3 { padding-left: 20px; font-size: .8rem; color: var(--muted); }
body.toc-open .toc {
  display: block; position: fixed; z-index: 20;
  top: calc(max(10px, env(safe-area-inset-top)) + 48px); right: max(16px, env(safe-area-inset-right));
  width: min(360px, calc(100vw - 32px)); max-height: 72vh; overflow: auto;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 12px 32px rgba(0, 0, 0, .16); padding: 12px 8px;
}
@media (min-width: 1100px) {
  .r-layout { grid-template-columns: 250px minmax(0, 1fr) 250px; align-items: start; }
  .toc, body.toc-open .toc {
    display: block; position: sticky; top: 72px; z-index: auto;
    width: auto; max-height: calc(100vh - 96px); overflow: auto;
    margin-top: 36px; padding: 0; background: none; border: 0; box-shadow: none;
  }
  .rb-toc { display: none; }
}

/* 이전·다음 모듈 */
.rnav { max-width: 640px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 20px 0 40px; border-top: 1px solid var(--line); }
.rn { display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: inherit; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.rn:hover { border-color: var(--accent); }
.rn span { font-size: .75rem; color: var(--muted); }
.rn b { font-weight: 600; font-size: .9rem; line-height: 1.4; word-break: keep-all; }
.rn.next { grid-column: 2; text-align: right; }