:root {
  --desk: #e7dcc8;
  --desk-deep: #ddd0b8;
  --paper: #f7f1e6;
  --ink: #241c15;
  --ink-soft: #5a4e43;
  --faint: #74685c;
  --line: rgba(36, 28, 21, 0.12);
  --cinnabar: #9d342c;
  --cinnabar-soft: rgba(157, 52, 44, 0.1);
  --moss: #3d6554;
  --shadow: 0 16px 40px rgba(72, 48, 22, 0.08);
  --sidebar: 300px;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --kai: "Kaiti SC", "STKaiti", "KaiTi", "Songti SC", serif;
  color-scheme: light;
}

html[data-theme="night"] {
  --desk: #14110e;
  --desk-deep: #1c1814;
  --paper: #241f1a;
  --ink: #f4ecdf;
  --ink-soft: #ddd2c2;
  --faint: #b3a594;
  --line: rgba(244, 236, 223, 0.14);
  --cinnabar: #e07a68;
  --cinnabar-soft: rgba(224, 122, 104, 0.14);
  --moss: #9dccb6;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body {
  font-family: var(--serif);
  color: var(--ink);
  background:
    radial-gradient(ellipse at 0% 0%, rgba(157, 52, 44, 0.08), transparent 36%),
    radial-gradient(ellipse at 100% 100%, rgba(61, 101, 84, 0.1), transparent 42%),
    var(--desk);
  letter-spacing: 0.02em;
}

button, input { font-family: inherit; color: inherit; }

button { cursor: pointer; }

button:focus-visible, input:focus-visible, a:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

#app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 22px 16px 16px;
  background: color-mix(in srgb, var(--paper) 72%, var(--desk));
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 0 6px 8px;
}

#close-catalog { display: none; margin-left: auto; }

.brand h1 {
  margin: 0;
  font-family: var(--kai);
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.brand p {
  margin: 4px 0 0;
  color: var(--faint);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.brand-mark {
  width: 46px;
  height: 46px;
  flex: none;
  border: 1.5px solid var(--cinnabar);
  background: transparent;
  color: var(--cinnabar);
  font-family: var(--kai);
  font-size: 1.35rem;
  letter-spacing: 0;
  transform: rotate(-8deg);
}

.side-tools { padding: 12px 6px 8px; }

.search input {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--line);
  background: transparent;
  padding: 8px 2px 7px;
  font-size: 0.95rem;
}

.search input::placeholder { color: var(--faint); }

.catalog {
  flex: 1;
  overflow: auto;
  padding: 6px 0 12px;
  min-height: 0;
}

.catalog-count {
  margin: 4px 8px 10px;
  color: var(--faint);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.vol-block { margin-bottom: 8px; }

.vol-name {
  position: sticky;
  top: 0;
  z-index: 1;
  margin: 0;
  width: 100%;
  text-align: left;
  border: none;
  background: color-mix(in srgb, var(--paper) 88%, var(--desk));
  color: var(--cinnabar);
  letter-spacing: 0.18em;
  padding: 8px 8px 6px;
  font-size: 0.92rem;
}

.vol-name[aria-pressed="true"] { background: var(--cinnabar-soft); }

.poem-link {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: none;
  border-left: 2px solid transparent;
  background: transparent;
  padding: 7px 8px 7px 12px;
  color: var(--ink);
}

.poem-link small {
  color: var(--faint);
  font-size: 0.78rem;
  flex: none;
}

.poem-link[aria-current="page"] {
  border-left-color: var(--cinnabar);
  background: var(--cinnabar-soft);
  color: var(--cinnabar);
}

.side-foot {
  border-top: 1px solid var(--line);
  padding-top: 8px;
  padding-bottom: env(safe-area-inset-bottom);
}

.foot-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.book-links {
  display: flex;
  align-items: center;
  gap: 1em;
  padding: 2px 8px 0;
  font-size: 0.98rem;
  letter-spacing: 0.16em;
}

.book-links a,
.book-links [aria-current="page"] {
  text-decoration: none;
  padding: 8px 0;
}

.book-links a { color: var(--cinnabar); }

.book-links [aria-current="page"] { color: var(--ink); }

.side-foot button, .text-btn {
  border: none;
  background: transparent;
  letter-spacing: 0.14em;
  padding: 6px 4px;
}

.side-foot p {
  margin: 8px 4px 0;
  color: var(--faint);
  font-size: 0.75rem;
  line-height: 1.6;
}

.content { min-width: 0; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 8px 22px;
  background: color-mix(in srgb, var(--desk) 86%, transparent);
  backdrop-filter: blur(10px);
}

#crumb {
  margin: 0;
  flex: 1;
  color: var(--faint);
  letter-spacing: 0.12em;
}

#menu-btn { display: none; }

#view { padding: 6px 22px 36px; }

.library, .reader { margin: 0 auto; }

.library { width: min(980px, 100%); }

.reader { width: min(740px, 100%); padding-bottom: 96px; }

.hero, .card, .sheet-head {
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 22px 24px;
  margin: 8px 0 22px;
  border: 1px solid var(--line);
}

.kicker, .section-label, .meta, .footnote {
  color: var(--faint);
  letter-spacing: 0.12em;
}

.kicker { margin: 0 0 6px; font-size: 0.82rem; }

.hero h2, .card h3, .poem-title, .stanza-label {
  font-family: var(--kai);
  font-weight: 500;
}

.hero h2 { margin: 0; font-size: 2rem; letter-spacing: 0.14em; }

.hero .excerpt, .card .excerpt {
  margin: 10px 0 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.open-btn, .pager button, .neighbor {
  border: 1px solid var(--line);
  background: transparent;
  padding: 8px 14px;
  letter-spacing: 0.14em;
}

.open-btn { color: var(--cinnabar); }

.filters { margin: 0 0 18px; }

.filter-row {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 2px;
  align-items: baseline;
  margin: 6px 0;
  padding-left: 3.4em;
}

.filter-label {
  position: absolute;
  left: 0;
  top: 4px;
  width: 3.2em;
  color: var(--faint);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.chip, .clear-btn {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 4px 8px;
  letter-spacing: 0.08em;
}

.chip[aria-pressed="true"] { color: var(--cinnabar); }

.clear-btn { color: var(--cinnabar); }

.library-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin: 8px 0 12px;
}

.library-head h2 {
  margin: 0;
  font-family: var(--kai);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.vol-section { margin: 18px 0 8px; }

.vol-section h2 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--cinnabar);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  min-height: 148px;
  text-align: left;
  border: 1px solid var(--line);
  padding: 16px 16px 14px;
}

.card:hover { border-color: color-mix(in srgb, var(--cinnabar) 45%, var(--line)); }

.card-title {
  margin: 6px 0 0;
  font-family: var(--kai);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.card .excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card .meta, .hero .meta { margin: 0; font-size: 0.82rem; }

.empty {
  padding: 48px 0;
  text-align: center;
  color: var(--faint);
}

.neighbors {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  min-height: 42px;
  margin-bottom: 8px;
}

.neighbor {
  max-width: 46%;
  border: none;
  padding: 6px 0;
  color: var(--ink-soft);
  background: transparent;
}

.neighbor.next { margin-left: auto; text-align: right; }

.sheet-head { padding: 28px 8px 8px; text-align: center; background: transparent; box-shadow: none; }

.byline {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  color: var(--ink-soft);
  letter-spacing: 0.12em;
}

.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.7em;
  height: 1.7em;
  margin-right: 4px;
  padding: 0 0.15em;
  border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar);
  font-family: var(--kai);
  letter-spacing: 0;
  transform: rotate(-8deg);
}

.dot { color: var(--faint); }

.title-reading {
  margin: 8px 0 0;
  color: var(--faint);
  letter-spacing: 0.14em;
  font-size: 0.92rem;
}

.poem-title {
  margin: 16px 0 0;
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: 0.18em;
  line-height: 1.25;
}

.poem-title .gloss { letter-spacing: 0.18em; }

.themes {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 10px;
}

.rule {
  width: 64px;
  height: 1px;
  margin: 20px auto 8px;
  background: var(--cinnabar);
  opacity: 0.75;
}

.verses { margin-top: 8px; scroll-margin-top: 76px; }

.verse-block, .stanza { margin: 0.85rem 0; }

.verse {
  margin: 0;
  text-align: center;
  font-size: clamp(1.28rem, 2.5vw, 1.72rem);
  line-height: 2;
  letter-spacing: 0.12em;
}

.layout-prose .verse {
  text-align: justify;
  text-indent: 2em;
  letter-spacing: 0.06em;
  line-height: 2.05;
  font-size: 1.22rem;
}

.stanza-label {
  margin: 1.3rem 0 0.2rem;
  text-align: center;
  color: var(--cinnabar);
  letter-spacing: 0.28em;
}

.trans {
  margin: 0.15rem auto 0.35rem;
  max-width: 38em;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.75;
  letter-spacing: 0.04em;
}

.layout-prose .trans {
  text-align: justify;
  text-indent: 2em;
}

.trans-mark {
  display: inline-block;
  margin-right: 0.45em;
  color: var(--cinnabar);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

.gloss {
  padding: 0;
  border: none;
  border-bottom: 1px dotted var(--cinnabar);
  background: transparent;
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  color: inherit;
}

.gloss.is-on {
  color: var(--cinnabar);
  background: var(--cinnabar-soft);
}

.leaf, .pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
  color: var(--faint);
}

.leaf button, .pager button {
  border: none;
  letter-spacing: 0.12em;
}

.leaf button:disabled, .pager button:disabled { opacity: 0.35; cursor: default; }

.drawer {
  margin-top: 22px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 6px;
}

.drawer-head h3 {
  margin: 0;
  font-family: var(--kai);
  font-weight: 500;
  letter-spacing: 0.2em;
  font-size: 1.15rem;
}

.note {
  margin: 0;
  padding: 0.72em 0;
  scroll-margin-top: 72px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  line-height: 1.9;
  text-align: justify;
}

.note-term {
  color: var(--cinnabar);
  letter-spacing: 0.04em;
}

.note .reading {
  color: var(--faint);
  font-size: 0.86em;
  letter-spacing: 0.02em;
}

.note.is-on {
  background: var(--cinnabar-soft);
  margin-inline: -8px;
  padding-inline: 8px;
}

.analysis-p {
  margin: 0 0 14px;
  color: var(--ink-soft);
  line-height: 1.9;
  text-align: justify;
}

.analysis-p { text-indent: 2em; }

.analysis-p + .pager { margin-bottom: 8px; }

.footnote {
  margin: 28px 0 0;
  text-align: center;
  font-size: 0.78rem;
  line-height: 1.7;
}

.dock {
  position: fixed;
  z-index: 6;
  left: var(--sidebar);
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px calc(12px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--desk) 90%, transparent);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.dock button {
  min-width: 92px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  letter-spacing: 0.22em;
  padding: 10px 16px 8px;
}

.dock button[aria-pressed="true"] { color: var(--cinnabar); }

.dock button[aria-pressed="true"]::after {
  content: "";
  display: block;
  width: 1.2em;
  height: 1px;
  margin: 6px auto 0;
  background: currentColor;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(28, 20, 12, 0.42);
  border: none;
}

.enter { animation: rise 0.35s ease; }

@keyframes rise {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (min-width: 861px) {
  #theme-btn-mini { display: none; }
}

@media (max-width: 860px) {
  #app { grid-template-columns: 1fr; }

  body.nav-open { overflow: hidden; }

  .sidebar {
    position: fixed;
    z-index: 30;
    width: min(78vw, 320px);
    transform: translateX(-105%);
    transition: transform 0.2s ease;
  }

  .sidebar.is-open { transform: none; }

  #menu-btn, #close-catalog { display: inline-block; }

  .dock { left: 0; }

  .hero {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .hero .open-btn { justify-self: start; }

  #view { padding-inline: 16px; }

  .verse { letter-spacing: 0.08em; }
}

@media (max-width: 430px) {
  .search input { font-size: 16px; }

  .book-links { font-size: 1.08rem; }

  .catalog-count,
  .vol-name,
  .filter-label,
  .library-head .meta,
  .vol-section h2 { font-size: 1rem; }

  .poem-link { font-size: 1.08rem; padding-top: 9px; padding-bottom: 9px; }

  .poem-link small { font-size: 0.95rem; }

  .side-foot p { font-size: 0.9rem; }

  .topbar,
  #crumb,
  .text-btn { font-size: 1.05rem; }

  .chip,
  .clear-btn {
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    padding: 6px 8px;
  }

  .card .meta { font-size: 0.98rem; }

  .card .excerpt { font-size: 1.08rem; line-height: 1.7; }

  .dock button {
    font-size: 1.15rem;
    letter-spacing: 0.1em;
    min-width: 0;
    padding: 12px 10px 8px;
  }
}

@media (pointer: coarse) {
  .keyhint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  .sidebar, .topbar, .dock, .scrim, .neighbors, .leaf, .filters, .footnote .keyhint {
    display: none !important;
  }

  #app { display: block; }

  body { background: white; }

}