:root {
  color-scheme: light;
  --bg: #f2f4f3;
  --paper: #ffffff;
  --ink: #18211f;
  --muted: #66716e;
  --line: #d7ddda;
  --line-strong: #b9c3bf;
  --teal: #17675b;
  --teal-soft: #e2efeb;
  --ochre: #a96f19;
  --ochre-soft: #f4ead8;
  --red: #994c42;
  --red-soft: #f2e4e1;
  --nav: #202927;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}

button,
input,
audio,
video {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  background: var(--nav);
  color: #fff;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.topbar {
  min-height: 54px;
  border-bottom: 1px solid #35403d;
  background: var(--nav);
  color: #f7faf8;
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(1120px, calc(100% - 32px));
  min-height: 54px;
  margin: 0 auto;
  font-size: 13px;
  font-weight: 700;
}

.topbar-mark {
  width: 11px;
  height: 11px;
  background: #e1a548;
}

.topbar-count {
  margin-left: auto;
  color: #b9c6c2;
  font-variant-numeric: tabular-nums;
}

.back-link {
  color: #f7faf8;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.library-main,
.document-main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.library-main {
  padding: 64px 0 72px;
}

.document-main {
  padding: 48px 0 72px;
}

.library-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 48px;
  align-items: end;
  margin-bottom: 54px;
}

.eyebrow {
  grid-column: 1;
  margin: 0 0 9px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: 0;
}

.library-header h1 {
  grid-column: 1;
  margin-bottom: 12px;
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 500;
  line-height: 1.04;
}

.lede {
  grid-column: 1;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.library-stats {
  grid-column: 2;
  grid-row: 1 / span 3;
  display: grid;
  grid-template-columns: repeat(3, minmax(72px, auto));
  gap: 0;
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.library-stats div {
  padding: 15px 18px;
  border-right: 1px solid var(--line);
}

.library-stats div:last-child {
  border-right: 0;
}

.library-stats dt {
  color: var(--muted);
  font-size: 11px;
}

.library-stats dd {
  margin: 2px 0 0;
  font-family: Georgia, serif;
  font-size: 28px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--line-strong);
}

.section-heading h2 {
  margin: 0;
  font-size: 18px;
}

.section-heading span {
  color: var(--muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.document-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.document-card {
  position: relative;
  display: grid;
  grid-template-rows: 250px 1fr;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.document-card:hover {
  border-color: var(--line-strong);
}

.cover-frame {
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 20px;
  background: #e6ece9;
}

.document-card[data-accent="ochre"] .cover-frame {
  background: var(--ochre-soft);
}

.document-card[data-accent="red"] .cover-frame {
  background: var(--red-soft);
}

.document-card[data-accent="cyan"] .cover-frame {
  background: #dcecef;
}

.cover-frame img {
  display: block;
  width: 142px;
  height: 196px;
  object-fit: cover;
  object-position: center top;
  border: 1px solid rgba(24, 33, 31, .18);
  background: #fff;
  box-shadow: 0 8px 18px rgba(24, 33, 31, .13);
}

.document-card-body {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 20px;
}

.card-index {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.document-card h3 {
  margin-bottom: 5px;
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: 24px;
  font-weight: 500;
  line-height: 1.2;
}

.original-title {
  min-height: 42px;
  margin-bottom: 15px;
  color: var(--muted);
  font-family: Georgia, serif;
  font-size: 14px;
  line-height: 1.45;
}

.card-meta,
.variant-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 12px;
  color: var(--muted);
  font-size: 13px;
}

.variant-tags {
  margin-top: 11px;
}

.variant-tag {
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #f8faf9;
  color: var(--ink);
  font-size: 11px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-height: 42px;
  margin-top: 22px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: var(--teal);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.card-link::after {
  content: "→";
  font-size: 18px;
}

.card-link:hover {
  color: #0f4e45;
}

.status-panel {
  grid-column: 1 / -1;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--muted);
}

.status-panel.error {
  border-color: #d4aaa4;
  color: #7b3229;
}

.document-hero {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 32px;
}

.document-cover {
  width: 190px;
  height: 262px;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: 0 12px 25px rgba(24, 33, 31, .12);
}

.document-copy {
  min-width: 0;
  padding-bottom: 4px;
}

.document-copy .eyebrow {
  margin-bottom: 11px;
}

.document-title {
  max-width: 780px;
  margin-bottom: 10px;
  overflow-wrap: anywhere;
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: clamp(36px, 6vw, 62px);
  font-weight: 500;
  line-height: 1.02;
}

.document-original-title {
  max-width: 760px;
  margin-bottom: 18px;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-family: Georgia, serif;
  font-size: 17px;
}

.document-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.document-facts span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.document-facts span::before {
  width: 5px;
  height: 5px;
  background: var(--ochre);
  content: "";
}

.video-section {
  margin: 0 0 32px;
}

.video-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 12px;
  align-items: start;
}

.video-stage {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.video-stage video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #101514;
  object-fit: contain;
}

.video-current {
  padding: 14px 17px 16px;
  border-top: 1px solid var(--line);
}

.video-current-label {
  margin: 0 0 4px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.video-current h3 {
  margin: 0 0 3px;
  font-size: 18px;
  line-height: 1.3;
}

.video-current p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.video-list {
  display: grid;
  gap: 9px;
}

.video-select {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 11px;
  align-items: start;
  min-width: 0;
  width: 100%;
  min-height: 112px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.video-select:hover {
  border-color: var(--line-strong);
}

.video-select[data-active="true"] {
  border-color: var(--teal);
  background: #f8fbfa;
  box-shadow: inset 4px 0 0 var(--teal);
}

.video-number {
  color: var(--muted);
  font-family: Georgia, serif;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.video-choice-copy {
  min-width: 0;
}

.video-choice-label {
  display: block;
  margin-bottom: 4px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 800;
}

.video-choice-title {
  display: block;
  overflow-wrap: anywhere;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
}

.video-choice-meta {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 11px;
}

.variant-switch {
  display: flex;
  gap: 4px;
  width: fit-content;
  margin: 0 0 20px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.variant-switch[hidden] {
  display: none;
}

.variant-button {
  min-height: 38px;
  padding: 7px 15px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}

.variant-button[aria-pressed="true"] {
  background: var(--nav);
  color: #fff;
}

.variant-button:focus-visible,
.video-select:focus-visible,
.track-select:focus-visible,
.pdf-toggle:focus-visible,
.pdf-open-translation:focus-visible,
.pdf-open-external:focus-visible,
.pdf-close:focus-visible,
.card-link:focus-visible {
  outline: 3px solid #e1a548;
  outline-offset: 2px;
}

.reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
  padding: 16px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.reader-kicker {
  margin-bottom: 3px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.reader-summary,
.pdf-location,
.pdf-help {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.reader-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.pdf-toggle,
.pdf-open-translation,
.pdf-open-external {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.pdf-toggle {
  background: var(--nav);
  color: #fff;
  cursor: pointer;
}

.pdf-open-translation {
  border-color: #d2b47f;
  background: var(--ochre-soft);
  color: #68450f;
}

.pdf-open-external {
  background: transparent;
  color: var(--teal);
}

.pdf-toggle:hover {
  background: #263a36;
}

.pdf-open-translation:hover {
  background: #ead8b7;
}

.pdf-open-external:hover {
  background: var(--teal-soft);
}

.listening-layout {
  display: block;
}

.player-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px 28px;
  align-items: end;
  margin-bottom: 30px;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.now-playing-label {
  margin-bottom: 5px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.now-playing-title {
  margin-bottom: 5px;
  font-size: 22px;
  line-height: 1.25;
}

.now-playing-meta {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.player-panel audio {
  grid-column: 1 / -1;
  display: block;
  width: 100%;
}

.player-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  white-space: nowrap;
}

.auto-next {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

.auto-next input {
  width: 16px;
  height: 16px;
  accent-color: var(--teal);
}

.track-section {
  margin-top: 0;
}

.track-list {
  display: grid;
  gap: 9px;
}

.track-row {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.track-row[data-active="true"] {
  border-color: var(--teal);
  box-shadow: inset 4px 0 0 var(--teal);
}

.track-select {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  gap: 13px;
  align-items: center;
  min-width: 0;
  width: 100%;
  padding: 15px 14px;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.track-number {
  color: var(--muted);
  font-family: Georgia, serif;
  font-size: 20px;
  font-variant-numeric: tabular-nums;
}

.track-copy {
  min-width: 0;
}

.track-title {
  display: block;
  overflow-wrap: anywhere;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
}

.track-pages {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.track-duration {
  color: var(--muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.pdf-reader {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.pdf-reader[hidden] {
  display: none;
}

.pdf-reader-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.pdf-reader-header h2 {
  margin-bottom: 3px;
  font-size: 20px;
}

.pdf-close {
  display: grid;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.pdf-close:hover {
  background: var(--teal-soft);
}

.pdf-reader iframe {
  display: block;
  width: 100%;
  height: 74vh;
  min-height: 620px;
  border: 0;
  background: #e4e7e5;
}

.pdf-help {
  padding: 10px 16px 12px;
  border-top: 1px solid var(--line);
}

.pdf-help a {
  color: var(--teal);
  font-weight: 800;
}

.library-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

@media (min-width: 981px) {
  .listening-layout.pdf-visible {
    display: grid;
    grid-template-columns: minmax(350px, .72fr) minmax(0, 1.28fr);
    grid-template-areas:
      "player reader"
      "tracks reader";
    gap: 24px;
    align-items: start;
  }

  .listening-layout.pdf-visible .player-panel {
    grid-area: player;
  }

  .listening-layout.pdf-visible .track-section {
    grid-area: tracks;
  }

  .listening-layout.pdf-visible .pdf-reader {
    position: sticky;
    top: 72px;
    grid-area: reader;
  }

  .listening-layout.pdf-visible .player-panel {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-bottom: 0;
    padding: 18px;
  }

  .listening-layout.pdf-visible .player-actions {
    justify-content: flex-start;
  }

  .listening-layout.pdf-visible .player-panel audio {
    grid-column: 1;
  }

  .listening-layout.pdf-visible .track-select {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 9px;
    padding: 12px 10px;
  }

  .listening-layout.pdf-visible .track-duration {
    grid-column: 2;
  }

  .listening-layout.pdf-visible .pdf-reader iframe {
    height: calc(100vh - 104px);
    min-height: 680px;
  }
}

@media (max-width: 860px) {
  .library-header {
    display: block;
  }

  .library-stats {
    width: fit-content;
    margin-top: 28px;
  }

  .document-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-layout {
    grid-template-columns: 1fr;
  }

  .video-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (max-width: 620px) {
  .topbar-inner,
  .library-main,
  .document-main,
  .library-footer {
    width: min(100% - 24px, 1120px);
  }

  .library-main {
    padding: 42px 0 52px;
  }

  .document-main {
    padding: 30px 0 52px;
  }

  .library-header {
    margin-bottom: 38px;
  }

  .library-stats {
    width: 100%;
  }

  .library-stats div {
    min-width: 0;
    padding: 12px;
  }

  .document-grid {
    grid-template-columns: 1fr;
  }

  .document-card,
  .document-card:last-child {
    grid-column: auto;
    grid-template-columns: 116px minmax(0, 1fr);
    grid-template-rows: 1fr;
  }

  .cover-frame {
    min-height: 100%;
    padding: 12px;
  }

  .cover-frame img {
    width: 90px;
    height: 124px;
  }

  .document-card-body {
    padding: 16px;
  }

  .document-card h3 {
    font-size: 20px;
  }

  .original-title {
    min-height: 0;
    font-size: 12px;
  }

  .card-link {
    margin-top: 16px;
  }

  .document-hero {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
    margin-bottom: 26px;
  }

  .document-cover {
    width: 96px;
    height: 132px;
  }

  .document-copy .eyebrow {
    margin-top: 2px;
  }

  .document-title {
    margin-bottom: 8px;
    font-size: clamp(26px, 7vw, 36px);
    line-height: 1.08;
  }

  .document-original-title {
    margin-bottom: 13px;
    font-size: 14px;
    line-height: 1.4;
  }

  .document-facts {
    grid-column: 1 / -1;
  }

  .video-list {
    grid-template-columns: 1fr;
  }

  .video-select {
    min-height: 0;
  }

  .variant-switch {
    width: 100%;
  }

  .variant-button {
    flex: 1;
  }

  .reader-toolbar {
    display: block;
    align-items: flex-start;
  }

  .reader-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 12px;
  }

  .pdf-toggle,
  .pdf-open-translation,
  .pdf-open-external {
    width: 100%;
    padding-right: 8px;
    padding-left: 8px;
  }

  .reader-actions.has-translation .pdf-open-external {
    grid-column: 1 / -1;
  }

  .player-panel {
    grid-template-columns: 1fr;
    padding: 17px;
  }

  .player-actions {
    justify-content: space-between;
  }

  .player-panel audio {
    grid-column: 1;
  }

  .track-select {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 9px;
    padding: 13px 10px;
  }

  .track-duration {
    grid-column: 2;
  }

  .pdf-reader iframe {
    height: 70vh;
    min-height: 480px;
  }

  .listening-layout.pdf-visible {
    display: flex;
    flex-direction: column;
  }

  .listening-layout.pdf-visible .player-panel {
    order: 1;
    width: 100%;
  }

  .listening-layout.pdf-visible .pdf-reader {
    order: 2;
    width: 100%;
    margin-bottom: 30px;
  }

  .listening-layout.pdf-visible .track-section {
    order: 3;
    width: 100%;
  }
}

@media (max-width: 430px) {
  .document-hero {
    grid-template-columns: 82px minmax(0, 1fr);
    gap: 14px;
  }

  .document-cover {
    width: 82px;
    height: 113px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}