.lf-reader {
  --lf-primary: #274C70;
  --lf-surface: #FFFFFF;
  --lf-background: #E9EFF4;
  --lf-ink: #203346;
  --lf-muted: #53677A;
  --lf-line: #CCD7E1;
  --lf-font: 'Segoe UI', Arial, sans-serif;
  --lf-display: Georgia, 'Times New Roman', serif;
  --lf-radius: .625rem;
  --lf-unit: .5rem;
  --lf-scroll-thumb: #9CADBD;
  --lf-scroll-track: #E9EFF4;
  --lf-scroll-hover: #647D94;
  --lf-scroll-active: #274C70;
  width: 100%; height: 720px; min-height: 420px; max-width: 100%;
  display: flex; flex-direction: column; position: relative;
  background: var(--lf-background); color: var(--lf-ink);
  font: 16px/1.5 var(--lf-font); text-align: left; isolation: isolate;
  border: 1px solid var(--lf-line); border-radius: 12px; overflow: hidden;
  color-scheme: light; container-type: inline-size; container-name: lat-book;
}
.lf-reader, .lf-reader *, .lf-reader *::before, .lf-reader *::after { box-sizing: border-box; }
.lf-reader, .lf-reader * { scrollbar-width: thin; scrollbar-color: var(--lf-scroll-thumb) var(--lf-scroll-track); }
.lf-reader ::-webkit-scrollbar { width: 8px; height: 8px; }
.lf-reader ::-webkit-scrollbar-track { background: var(--lf-scroll-track); }
.lf-reader ::-webkit-scrollbar-thumb { background: var(--lf-scroll-thumb); border-radius: 6px; }
.lf-reader ::-webkit-scrollbar-thumb:hover { background: var(--lf-scroll-hover); }
.lf-reader ::-webkit-scrollbar-thumb:active { background: var(--lf-scroll-active); }
.lf-reader [hidden] { display: none !important; }
.lf-reader button, .lf-reader input, .lf-reader a { font: inherit; letter-spacing: normal; text-transform: none; }
.lf-reader button { cursor: pointer; }
.lf-reader button:disabled { cursor: default; opacity: .35; }
.lf-reader :focus-visible { outline: 3px solid var(--lf-primary); outline-offset: 3px; }
.lf-reader:focus-visible { outline-offset: -3px; }
.lf-reader a { color: var(--lf-primary); }
.lf-reader svg { flex: 0 0 auto; }
.lf-reader .lf-header { min-height: 82px; flex-shrink: 0; padding: 16px 28px; display: flex; align-items: center; gap: 26px; border-bottom: 1px solid var(--lf-line); background: var(--lf-surface); }
.lf-reader .lf-brand { display: flex; align-items: center; gap: 11px; font: 32px/1 var(--lf-display); color: var(--lf-primary); flex-shrink: 0; }
.lf-reader .lf-brand > svg { width: 30px; height: 30px; }
.lf-reader .lf-brand-dot { color: var(--lf-muted); }
.lf-reader .lf-document { min-width: 0; border-left: 1px solid var(--lf-line); padding-left: 26px; flex: 1; }
.lf-reader .lf-title { font: 600 16px/1.45 var(--lf-font); color: var(--lf-ink); margin: 0; padding: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lf-reader .lf-meta { font-size: 12px; color: var(--lf-muted); display: block; margin-top: 3px; }
.lf-reader .lf-original { display: flex; align-items: center; justify-content: center; gap: 9px; min-height: 44px; padding: 8px 12px; flex-shrink: 0; text-decoration: none; font-size: 14px; border-radius: var(--lf-radius); }
.lf-reader .lf-original:hover { background: var(--lf-background); text-decoration: none; }
.lf-reader .lf-workspace { display: flex; min-height: 0; flex: 1; overflow: hidden; }
.lf-reader .lf-desk { position: relative; min-width: 0; min-height: 0; flex: 1; padding-bottom: 30px; }
.lf-reader .lf-stage { position: absolute; inset: 0 0 30px; overflow: hidden; overscroll-behavior: contain; }
.lf-reader.lf-zoomed .lf-stage { overflow: auto; scrollbar-gutter: stable both-edges; }
/* Rotated pages and tall shadow layers must not enlarge the scrollable book area. */
.lf-reader .lf-book-space { display: flex; align-items: center; justify-content: center; position: relative; overflow: clip; contain: layout paint; }
.lf-reader .lf-book { flex-shrink: 0; user-select: none; }
.lf-reader .lf-book .stf__block { cursor: grab; }
.lf-reader.lf-folding .lf-book .stf__block { cursor: grabbing; }
.lf-reader.lf-zoomed .lf-book .stf__block { cursor: auto; }
.lf-reader .lf-page { background: var(--lf-surface); overflow: hidden; box-shadow: 0 0 1px #20334640; }
.lf-reader .lf-page img { display: block; width: 100%; height: 100%; object-fit: contain; position: absolute; inset: 0; max-width: none; border: 0; border-radius: 0; user-select: none; }
.lf-reader .lf-page img:not([src]), .lf-reader .lf-thumb img:not([src]) { visibility: hidden; }
.lf-reader .lf-page::after { content: ''; position: absolute; inset: 0; pointer-events: none; box-shadow: inset 8px 0 20px -18px #20334699, inset -8px 0 20px -18px #20334666; }
.lf-reader .stf__wrapper { height: 100%; filter: drop-shadow(0 14px 12px #20334624); }
.lf-reader .lf-paper-label { position: absolute; inset: 0; display: grid; place-items: center; color: var(--lf-muted); font-size: 14px; }
.lf-reader .lf-edge { position: absolute; top: calc(50% - 34px); z-index: 5; }
.lf-reader .lf-edge-left { left: 12px; }
.lf-reader .lf-edge-right { right: 12px; }
.lf-reader .lf-edge .lf-btn { background: var(--lf-surface); border-radius: 50%; border-color: var(--lf-line); width: 44px; height: 44px; box-shadow: 0 2px 6px #2033460d; }
.lf-reader .lf-edge .lf-btn:disabled { opacity: 0; pointer-events: none; }
.lf-reader .lf-hint { position: absolute; left: 16px; right: 16px; bottom: 7px; margin: 0; text-align: center; font-size: 12px; line-height: 1.4; color: var(--lf-muted); pointer-events: none; }
.lf-reader .lf-cover-status { position: absolute; inset: 0; z-index: 10; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; background: var(--lf-background); padding: 24px; text-align: center; }
.lf-reader .lf-cover-status strong { font-size: 18px; font-weight: 600; }
.lf-reader .lf-load-detail { color: var(--lf-muted); font-size: 14px; max-width: 400px; }
.lf-reader .lf-spinner { width: 32px; height: 32px; border: 2px solid var(--lf-line); border-top-color: var(--lf-primary); border-radius: 50%; animation: lf-spin .75s linear infinite; margin-bottom: 8px; }
.lf-reader .lf-retry { background: var(--lf-primary); color: var(--lf-surface); border: 1px solid var(--lf-primary); border-radius: var(--lf-radius); padding: 10px 24px; min-height: 44px; margin-top: 8px; }
.lf-reader .lf-retry:hover { opacity: .88; }
.lf-reader .lf-toolbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; flex-shrink: 0; gap: 8px; padding: 12px 24px; border-top: 1px solid var(--lf-line); background: var(--lf-surface); }
.lf-reader .lf-tool-group { display: flex; align-items: center; gap: 4px; }
.lf-reader .lf-pages-toggle { gap: 8px; font-size: 14px; color: var(--lf-muted); }
.lf-reader .lf-btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px; margin: 0; width: 44px; height: 44px; min-width: 44px; border: 1px solid transparent; border-radius: var(--lf-radius); background: transparent; color: var(--lf-ink); box-shadow: none; line-height: 1; }
.lf-reader .lf-btn:not(:disabled):hover { background: var(--lf-background); border-color: var(--lf-line); }
.lf-reader .lf-btn:not(:disabled):active { background: var(--lf-line); }
.lf-reader .lf-btn[aria-expanded="true"] { background: var(--lf-background); border-color: var(--lf-line); color: var(--lf-primary); }
.lf-reader .lf-page-form { display: flex; align-items: center; gap: 7px; margin: 0; padding: 0; }
.lf-reader .lf-page-input { color: var(--lf-ink); background: var(--lf-background); border: 1px solid var(--lf-line); border-radius: 6px; width: 58px; height: 38px; min-height: 38px; padding: 4px; margin: 0; text-align: center; font-size: 14px; appearance: textfield; box-shadow: none; }
.lf-reader .lf-page-input::-webkit-inner-spin-button, .lf-reader .lf-page-input::-webkit-outer-spin-button { appearance: none; margin: 0; }
.lf-reader .lf-page-input[aria-invalid="true"] { outline: 2px solid var(--lf-primary); }
.lf-reader .lf-total { color: var(--lf-muted); font-size: 14px; min-width: 28px; }
.lf-reader .lf-zoom { min-width: 47px; text-align: center; font-size: 14px; color: var(--lf-ink); }
.lf-reader .lf-divider { width: 1px; height: 20px; background: var(--lf-line); margin: 0 10px; }
.lf-reader .lf-bottom { min-height: 34px; flex-shrink: 0; display: flex; gap: 12px; flex-wrap: wrap; padding: 0 28px 10px; background: var(--lf-surface); font-size: 12px; color: var(--lf-muted); }
.lf-reader .lf-keys { margin-left: auto; }
.lf-reader .lf-message { color: var(--lf-primary); }
.lf-reader .lf-thumbs { width: 188px; min-width: 188px; background: var(--lf-surface); border-right: 1px solid var(--lf-line); display: flex; flex-direction: column; min-height: 0; }
.lf-reader .lf-drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-bottom: 1px solid var(--lf-line); font-size: 14px; }
.lf-reader .lf-thumb-list { display: grid; grid-template-columns: 1fr; align-content: start; gap: 14px; padding: 14px 26px; overflow: auto; min-height: 0; overscroll-behavior: contain; }
.lf-reader .lf-thumb { background: transparent; color: var(--lf-muted); margin: 0; border: 2px solid transparent; border-radius: 6px; padding: 5px; display: flex; flex-direction: column; gap: 6px; align-items: center; font-size: 12px; line-height: 1.4; }
.lf-reader .lf-thumb:hover { background: var(--lf-background); }
.lf-reader .lf-thumb:active { background: var(--lf-line); }
.lf-reader .lf-thumb[aria-current] { border-color: var(--lf-primary); background: var(--lf-background); color: var(--lf-primary); }
.lf-reader .lf-thumb-paper { display: block; width: 100%; background: var(--lf-background); position: relative; overflow: hidden; border: 1px solid var(--lf-line); }
.lf-reader .lf-thumb img { display: block; width: 100%; height: 100%; object-fit: contain; position: absolute; inset: 0; border-radius: 0; }
.lf-reader .lf-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.lf-reader .lf-jump:focus-visible { position: static; width: auto; height: 44px; clip: auto; padding: 6px 10px; margin: 0; color: var(--lf-ink); background: var(--lf-background); border: 1px solid var(--lf-line); }
.lf-reader .lf-fallback { padding: 24px; }
.lf-reader:fullscreen { width: 100vw !important; height: 100dvh !important; border: 0; border-radius: 0; }
body.lf-standalone { margin: 0; padding: 0; background: #E9EFF4; }
.lf-standalone-main { margin: 0; padding: 0; width: 100%; max-width: none; }
.lf-standalone-main > .lf-reader { height: 100dvh; border: 0; border-radius: 0; }
.admin-bar .lf-standalone-main > .lf-reader { height: calc(100dvh - 32px); }
@keyframes lf-spin { to { transform: rotate(360deg); } }
@media (max-width: 782px) { .admin-bar .lf-standalone-main > .lf-reader { height: calc(100dvh - 46px); } }
@container lat-book (max-width: 659px) {
  .lf-reader .lf-header { min-height: 72px; padding: 12px 14px; gap: 14px; }
  .lf-reader .lf-brand { font-size: 28px; gap: 7px; }
  .lf-reader .lf-brand > svg { display: none; }
  .lf-reader .lf-document { padding-left: 14px; }
  .lf-reader .lf-title { font-size: 14px; }
  .lf-reader .lf-original { padding: 10px; }
  .lf-reader .lf-original span { display: none; }
  .lf-reader .lf-toolbar { padding: 6px 10px; gap: 2px 5px; }
  .lf-reader .lf-pages-toggle > span, .lf-reader .lf-keys, .lf-reader .lf-divider { display: none; }
  .lf-reader .lf-navigation { gap: 0; }
  .lf-reader .lf-zoom-group { gap: 0; }
  .lf-reader .lf-zoom { min-width: 42px; }
  .lf-reader .lf-bottom { padding: 4px 16px 8px; font-size: 12px; min-height: 30px; }
  .lf-reader .lf-workspace { flex-direction: column-reverse; }
  .lf-reader .lf-thumbs { width: 100%; min-width: 0; height: 148px; min-height: 148px; border-right: 0; border-top: 1px solid var(--lf-line); flex-direction: row; }
  .lf-reader .lf-drawer-head { padding: 4px; border: 0; }
  .lf-reader .lf-drawer-head strong { display: none; }
  .lf-reader .lf-thumb-list { display: flex; flex: 1; gap: 12px; padding: 10px; }
  .lf-reader .lf-thumb { width: 70px; min-width: 70px; height: 126px; }
  .lf-reader .lf-thumb-paper { max-height: 92px; }
  .lf-reader .lf-edge { display: none; }
}
@container lat-book (max-width: 440px) {
  .lf-reader .lf-toolbar { justify-content: center; }
  .lf-reader .lf-pages-toggle { margin-right: 12px; }
  .lf-reader .lf-zoom-group { width: 100%; justify-content: center; }
  .lf-reader .lf-toolbar .lf-page-input { width: 48px; }
}
@media (prefers-reduced-motion: reduce) {
  .lf-reader *, .lf-reader *::before, .lf-reader *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .lf-reader, .lf-reader * { scrollbar-color: auto; }
  .lf-reader .lf-btn, .lf-reader .lf-thumb, .lf-reader .lf-page-input { border: 1px solid ButtonText; }
  .lf-reader .lf-thumb[aria-current] { outline: 3px solid Highlight; }
}