/* Sable and Lotus: rice paper, ink, and one vermilion seal. */

:root {
  --paper: #f4eee2;
  --paper-2: #ebe3d2;
  --ink: #241f19;
  --ink-2: #5c5348;
  --ink-3: #8a7e6e;
  --rule: #d9ceb9;
  --seal: #b3372a;
  --seal-ink: #fbf6ec;
  --grain-o: .55;
  --shadow: 0 1px 0 rgba(70, 45, 20, .05), 0 14px 32px -18px rgba(70, 45, 20, .35);

  --serif: "Literata", "Noto Serif TC", "Noto Serif JP", Georgia, serif;
  --display: "Cormorant Garamond", "Noto Serif TC", Georgia, serif;
  --cjk: "Noto Serif TC", "Noto Serif JP", "Songti TC", "PMingLiU", serif;

  --measure: 35rem;
  --gutter: clamp(1.15rem, 4.5vw, 2rem);
  --scale: 1;
  --text: calc(clamp(1.05rem, .98rem + .35vw, 1.2rem) * var(--scale));
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #171411; --paper-2: #211d18; --ink: #e9e1d2; --ink-2: #b0a594; --ink-3: #82786a;
    --rule: #39322a; --seal: #d6573f; --seal-ink: #1a1512; --grain-o: .18;
    --shadow: 0 1px 0 rgba(0, 0, 0, .3), 0 14px 32px -18px rgba(0, 0, 0, .8);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #171411; --paper-2: #211d18; --ink: #e9e1d2; --ink-2: #b0a594; --ink-3: #82786a;
  --rule: #39322a; --seal: #d6573f; --seal-ink: #1a1512; --grain-o: .18;
  --shadow: 0 1px 0 rgba(0, 0, 0, .3), 0 14px 32px -18px rgba(0, 0, 0, .8);
  color-scheme: dark;
}

:root[data-size="-1"] { --scale: .92; }
:root[data-size="1"] { --scale: 1.1; }
:root[data-size="2"] { --scale: 1.22; }
:root[data-size="3"] { --scale: 1.36; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.6;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
/* Paper grain, fixed so it does not swim while reading. A small pre-rendered tile, not an
   SVG noise filter: filters are recomputed on paint and are slow on budget phones. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: var(--grain-o);
  background: url("grain.png") 0 0 / 128px 128px;
}
::selection { background: rgba(179, 55, 42, .2); }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; border-radius: 2px; }
.skip { position: absolute; left: -999px; top: .5rem; z-index: 100; background: var(--ink); color: var(--paper); padding: .5rem .9rem; border-radius: .3rem; }
.skip:focus { left: .5rem; }
.cjk { font-family: var(--cjk); font-size: .95em; letter-spacing: .04em; font-style: normal; }

/* ---------------------------------------------------------------- seal */

.seal {
  --s: 2.5rem;
  display: inline-grid;
  place-items: center;
  flex: none;
  width: var(--s);
  height: var(--s);
  background: var(--seal);
  color: var(--seal-ink);
  font-family: var(--cjk);
  font-weight: 600;
  font-size: calc(var(--s) * .56);
  line-height: 1;
  border-radius: calc(var(--s) * .09);
  box-shadow: inset 0 0 0 calc(var(--s) * .075) var(--seal), inset 0 0 0 calc(var(--s) * .11) var(--seal-ink);
  transform: rotate(-2.5deg);
  -webkit-mask: url("speck.png") 0 0 / 40px 40px;
  mask: url("speck.png") 0 0 / 40px 40px;
}
.seal--num { font-family: var(--display); font-weight: 600; font-size: calc(var(--s) * .6); padding-bottom: .06em; }
.seal--sm { --s: 1.75rem; }
.seal--lg { --s: 3.6rem; }

/* ---------------------------------------------------------------- top bar */

.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60;
  background: var(--seal); transform: scaleX(0); transform-origin: 0 50%;
}
body:not(.is-chapter) .progress { display: none; }

.bar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .7rem var(--gutter);
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  -webkit-backdrop-filter: saturate(1.15) blur(12px);
  backdrop-filter: saturate(1.15) blur(12px);
  border-bottom: 1px solid transparent;
  transition: transform .35s ease, border-color .35s ease;
}
.bar.is-scrolled { border-bottom-color: var(--rule); }
.bar.is-hidden { transform: translateY(-100%); }
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; min-width: 0; }
.brand-name { font-family: var(--display); font-size: 1.2rem; font-weight: 600; letter-spacing: .01em; white-space: nowrap; }
.is-index .brand-name { visibility: hidden; }
.bar-nav { display: flex; align-items: center; gap: clamp(.75rem, 3vw, 1.5rem); font-size: .86rem; letter-spacing: .03em; }
.bar-nav a { text-decoration: none; color: var(--ink-2); }
.bar-nav a:hover { color: var(--ink); }
.aa {
  font: 500 1rem/1 var(--display); color: var(--ink);
  background: transparent; border: 1px solid var(--rule); border-radius: 999px;
  padding: .32rem .75rem .38rem; cursor: pointer;
}
.aa:hover, .aa[aria-expanded="true"] { border-color: var(--ink-3); }
@media (max-width: 420px) { .brand-name { display: none; } }

.settings {
  position: fixed; z-index: 55; top: 3.7rem; right: var(--gutter);
  width: min(17.5rem, calc(100vw - 2 * var(--gutter)));
  padding: 1rem 1.1rem; display: grid; gap: .9rem;
  background: var(--paper-2); border: 1px solid var(--rule); border-radius: .7rem; box-shadow: var(--shadow);
}
.settings[hidden] { display: none; }
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.set-label { font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.seg { display: inline-flex; border: 1px solid var(--rule); border-radius: 999px; overflow: hidden; }
.seg button {
  font: inherit; font-size: .85rem; color: var(--ink-2); background: transparent;
  border: 0; padding: .38rem .7rem; cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--rule); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.seg button:disabled { opacity: .35; cursor: default; }

/* ---------------------------------------------------------------- cover */

.cover {
  min-height: min(84vh, 50rem);
  display: grid; grid-template-columns: auto minmax(0, 31rem);
  align-items: center; justify-content: center;
  gap: clamp(2.5rem, 7vw, 6rem);
  padding: clamp(2.5rem, 8vh, 5rem) var(--gutter) clamp(3rem, 8vh, 5rem);
}
.cover-mark { display: flex; flex-direction: column; align-items: center; gap: 1.6rem; }
.cover-jp {
  writing-mode: vertical-rl;
  font-family: var(--cjk); font-weight: 600;
  font-size: clamp(3.4rem, 7.5vw, 5.8rem); line-height: 1; letter-spacing: .2em;
  margin-bottom: -.2em;
}
.kicker { margin: 0 0 1.1rem; font-size: .78rem; letter-spacing: .26em; text-transform: uppercase; color: var(--seal); }
.cover h1 {
  margin: 0;
  font-family: var(--display); font-weight: 500;
  font-size: clamp(3.1rem, 1.9rem + 5.2vw, 6rem); line-height: .92; letter-spacing: -.012em;
}
.cover-sub { margin: .7rem 0 0; font-family: var(--display); font-size: clamp(1.5rem, 1.15rem + 1.3vw, 2.15rem); color: var(--ink-2); }
.cover-tag { margin: 1.7rem 0 0; max-width: 26rem; color: var(--ink-2); line-height: 1.55; text-wrap: balance; }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2.3rem; }
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .82rem 1.3rem; border-radius: 999px;
  border: 1px solid var(--ink-3); color: var(--ink);
  font-size: .95rem; letter-spacing: .02em; text-decoration: none;
  transition: background-color .2s, border-color .2s, transform .2s;
}
.btn:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn.primary { background: var(--seal); border-color: var(--seal); color: var(--seal-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.btn[hidden] { display: none; }

@media (max-width: 760px) {
  .cover { grid-template-columns: 1fr; justify-items: center; text-align: center; min-height: 0; gap: 2.2rem; }
  .cover-mark { flex-direction: row; align-items: flex-end; gap: 1.1rem; }
  .cover-tag { margin-inline: auto; }
  .actions { justify-content: center; }
}

.epigraph { max-width: 38rem; margin: 0 auto; padding: 1rem var(--gutter) 3.5rem; text-align: center; }
.epigraph blockquote {
  margin: 0; font-family: var(--display); font-style: italic; font-weight: 500;
  font-size: clamp(1.55rem, 1.15rem + 1.6vw, 2.3rem); line-height: 1.25;
  text-wrap: balance;
}
.epigraph blockquote em { font-style: normal; }
.epigraph blockquote::before {
  content: ""; display: block; width: .5rem; height: .5rem; margin: 0 auto 1.6rem;
  background: var(--seal); transform: rotate(45deg);
}
.epigraph figcaption { margin-top: 1.1rem; font-size: .75rem; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); }

/* ---------------------------------------------------------------- contents */

.toc { max-width: 44rem; margin: 0 auto; padding: 1rem var(--gutter) 2rem; }
.toc h2 { margin: 0 0 1.4rem; text-align: center; font-family: var(--display); font-weight: 500; font-size: 2.2rem; }
.toc ol { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.toc li { border-bottom: 1px solid var(--rule); }
.toc a {
  display: grid; grid-template-columns: 7.2rem minmax(0, 1fr) auto; align-items: baseline; gap: 1rem;
  padding: 1.05rem .3rem; text-decoration: none;
  transition: background-color .2s;
}
.toc a:hover { background: color-mix(in srgb, var(--paper-2) 70%, transparent); }
.toc .lab { font-size: .74rem; letter-spacing: .17em; text-transform: uppercase; color: var(--ink-3); }
.toc .nm { font-family: var(--display); font-size: 1.5rem; font-weight: 500; line-height: 1.15; transition: color .2s; }
.toc a:hover .nm { color: var(--seal); }
.toc .min { font-size: .8rem; color: var(--ink-3); font-variant-numeric: tabular-nums; white-space: nowrap; }
.toc li.is-reading .min::before {
  content: ""; display: inline-block; width: .42em; height: .42em; margin-right: .55em; vertical-align: .12em;
  background: var(--seal); transform: rotate(45deg);
}
.toc li.is-read .nm { color: var(--ink-2); }
.toc li.is-read .min::after { content: " \00b7 read"; }
.toc-more, .toc-extra { margin: 1.6rem 0 0; text-align: center; font-size: .9rem; color: var(--ink-3); }
.toc-extra a { color: var(--ink-2); text-underline-offset: .2em; text-decoration-color: var(--rule); }
.toc-extra a:hover { color: var(--seal); }
@media (max-width: 560px) {
  .toc a { grid-template-columns: minmax(0, 1fr) auto; row-gap: .2rem; }
  .toc .lab { grid-column: 1 / -1; }
  .toc .lab:empty { display: none; }
}

/* ---------------------------------------------------------------- chapter */

.ch-head {
  max-width: 48rem; margin: clamp(3rem, 11vh, 6.5rem) auto clamp(2.2rem, 6vh, 3.5rem);
  padding: 0 var(--gutter); text-align: center;
  display: flex; flex-direction: column; align-items: center;
}
.ch-head .seal { --s: 2.7rem; margin-bottom: 1.5rem; }
.ch-label { margin: 0 0 .6rem; font-size: .76rem; letter-spacing: .26em; text-transform: uppercase; color: var(--ink-3); }
.ch-title {
  margin: 0; font-family: var(--display); font-weight: 500;
  font-size: clamp(2.35rem, 1.6rem + 3.2vw, 3.7rem); line-height: 1.05; letter-spacing: -.005em;
  text-wrap: balance;
}
.ch-title::after { content: ""; display: block; width: 3rem; height: 1px; margin: 1.6rem auto 0; background: var(--rule); }

.prose {
  max-width: calc(var(--measure) + 2 * var(--gutter));
  margin: 0 auto; padding: 0 var(--gutter);
  font-size: var(--text); line-height: 1.72;
  hyphens: auto; -webkit-hyphens: auto; text-wrap: pretty;
  font-variant-numeric: oldstyle-nums;
}
.prose p { margin: 0; }
.prose p + p { text-indent: 1.5em; }
.prose p.dateline + p, .prose p + p.dateline { text-indent: 0; }
.prose .lead { font-variant-caps: all-small-caps; letter-spacing: .07em; font-size: 1.06em; }
.prose .dateline {
  margin: 2.6em 0 1.5em; text-align: center; text-indent: 0;
  font-size: .74em; font-weight: 600; letter-spacing: .17em; text-transform: uppercase; color: var(--ink-2);
  font-variant-numeric: lining-nums; hyphens: manual; text-wrap: balance;
}
.prose > .dateline:first-child { margin-top: 0; }
.prose em { font-style: italic; }
.prose strong { font-weight: 600; }

.prose hr, .end-mark {
  position: relative; border: 0; height: .6em; width: 7.5em; margin: 2.8em auto;
  background:
    linear-gradient(var(--rule), var(--rule)) left center / 2.5em 1px no-repeat,
    linear-gradient(var(--rule), var(--rule)) right center / 2.5em 1px no-repeat;
}
.prose hr::after, .end-mark::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: .42em; height: .42em;
  background: var(--seal); transform: translate(-50%, -50%) rotate(45deg);
}
.end-mark { margin: 3.5rem auto 0; font-size: var(--text); }

.prose blockquote { margin: 1.8em 0; padding-left: 1.3em; border-left: 1px solid var(--rule); color: var(--ink-2); }

/* Poems: the Chinese is set in vertical columns, right to left, on vermilion-ruled paper,
   so the heads of the columns sit side by side along the top. */
.verse { margin: 2.6em auto; text-align: center; }
.verse-cjk {
  writing-mode: vertical-rl;
  width: max-content; max-width: 100%; margin: 0 auto 1.7em;
  font-family: var(--cjk); font-size: 1.28em; line-height: 1; letter-spacing: .34em;
  color: var(--ink); text-indent: 0;
  text-align: start;   /* every column starts at the top, as in a written letter */
}
/* Specific enough to beat `.prose p + p`: an indent or top margin here would push a
   column down and break the line of column heads. */
.prose .verse-cjk p {
  margin: 0; text-indent: 0; padding: .55em .55em .25em;
  border-left: 1px solid rgba(179, 55, 42, .32);
}
.prose .verse-cjk p:first-child { border-right: 1px solid rgba(179, 55, 42, .32); }
.verse-en { width: fit-content; max-width: 100%; margin: 0 auto; text-align: left; }
.prose .verse-en p { margin: 0; padding-left: 1.3em; text-indent: -1.3em; }
.verse-en + .verse-cjk { margin-top: 1.7em; }

.prose ul { padding-left: 1.2em; }

@media (max-width: 640px) {
  .prose p + p { text-indent: 0; margin-top: .9em; }
  .prose p + p.dateline { margin-top: 2.4em; }
}

/* ---------------------------------------------------------------- illustrations */

.plate { margin: 3em auto; width: min(100%, 26rem); text-align: center; }
.plate picture, .plate img { display: block; width: 100%; height: auto; }
.plate figcaption {
  margin-top: 1.15rem; text-indent: 0;
  font-family: var(--serif); font-size: .7rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-3);
}
/* Black-and-white plates are multiplied into the paper, so their white reads as the page itself,
   as if printed; a hairline frame stands off them like a plate in a book. */
.plate--mono img { mix-blend-mode: multiply; outline: 1px solid var(--rule); outline-offset: .55rem; }
.plate--color img { border-radius: 2px; box-shadow: var(--shadow); outline: 1px solid rgba(0, 0, 0, .06); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .plate--mono img { mix-blend-mode: normal; filter: brightness(.84) contrast(1.04); }
}
:root[data-theme="dark"] .plate--mono img { mix-blend-mode: normal; filter: brightness(.84) contrast(1.04); }
.plate--front { width: min(calc(100% - 2 * var(--gutter)), 30rem); margin: 0 auto 4rem; }

/* ---------------------------------------------------------------- pager, resume */

.pager {
  max-width: calc(var(--measure) + 6rem); margin: 3.5rem auto 0; padding: 0 var(--gutter);
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
.pager a, .pager .more {
  display: flex; flex-direction: column; gap: .35rem;
  padding: 1.15rem 1.3rem; border: 1px solid var(--rule); border-radius: .6rem;
  background: color-mix(in srgb, var(--paper-2) 75%, transparent);
  text-decoration: none; transition: border-color .2s, transform .2s;
}
.pager a:hover { border-color: var(--seal); transform: translateY(-1px); }
.pager .dir { font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); }
.pager .t { font-family: var(--display); font-size: 1.32rem; font-weight: 500; line-height: 1.2; }
.pager .prev .dir::before { content: "\2190\00a0\00a0"; }
.pager .next .dir::after { content: "\00a0\00a0\2192"; }
.pager .more .dir::after { content: none; }
.pager .next, .pager .more { grid-column: 2; text-align: right; align-items: flex-end; }
@media (max-width: 560px) {
  .pager { grid-template-columns: 1fr; }
  .pager .next, .pager .more { grid-column: auto; }
}

.resume {
  position: fixed; z-index: 40; left: 50%; bottom: max(1.2rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  font: inherit; font-size: .88rem; color: var(--paper); background: var(--ink);
  border: 0; border-radius: 999px; padding: .7rem 1.15rem; cursor: pointer;
  box-shadow: var(--shadow); white-space: nowrap;
  transition: opacity .4s, transform .4s;
}
.resume[hidden] { display: none; }
.resume.is-leaving { opacity: 0; transform: translate(-50%, .6rem); pointer-events: none; }

/* ---------------------------------------------------------------- cast */

.cast-wrap { max-width: 44rem; margin: 0 auto; padding: 0 var(--gutter); font-size: calc(1.02rem * var(--scale)); }
.cast-h { margin: 2.4rem 0 1rem; font-size: .76rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase; color: var(--seal); }
.cast-h:first-child { margin-top: 0; }
.cast { display: grid; grid-template-columns: minmax(0, 14rem) minmax(0, 1fr); margin: 0; border-top: 1px solid var(--rule); }
.cast dt, .cast dd { padding: .9rem 0; border-bottom: 1px solid var(--rule); }
.cast dt { padding-right: 1.5rem; line-height: 1.4; }
.cast dt strong { font-weight: 600; }
.cast dt .cjk { color: var(--ink-3); margin-left: .25em; }
.cast dd { margin: 0; color: var(--ink-2); line-height: 1.55; }
@media (max-width: 560px) {
  .cast { grid-template-columns: 1fr; }
  .cast dt { border-bottom: 0; padding-bottom: .15rem; }
  .cast dd { padding-top: 0; }
}

/* ---------------------------------------------------------------- footer */

.foot {
  margin-top: 5rem; padding: 2.2rem var(--gutter) 3rem;
  border-top: 1px solid var(--rule);
  text-align: center; font-size: .8rem; letter-spacing: .04em; color: var(--ink-3);
}

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

@media print {
  body::before, .bar, .progress, .settings, .pager, .resume, .foot, .skip { display: none !important; }
  body { background: #fff; color: #000; }
  .prose { max-width: none; font-size: 11pt; }
}