@font-face {
  font-family: PaperSerif;
  src: url('./serif.woff2') format('woff2');
  font-weight: 200 900;
  font-display: swap;
}
:root {
  --paper: #f4f0e7;
  --ink: #303a35;
  --muted: #62665e;
  --line: #d8d3c6;
  --accent: #936649;
  --serif: PaperSerif, Georgia, 'Songti SC', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 30px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}
img {
  max-width: 100%;
  display: block;
}
svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}
h1,
h2,
h3,
p {
  margin: 0;
}
button {
  border: 0;
  background: none;
}
a:hover {
  text-decoration-color: var(--accent);
}
[hidden] {
  display: none !important;
}
.skip {
  position: absolute;
  left: 16px;
  top: -100px;
  padding: 15px;
  background: var(--ink);
  color: white;
  z-index: 10;
}
.skip:focus {
  top: 16px;
}
.site-header {
  height: 90px;
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 550;
  letter-spacing: -0.6px;
}
.brand-cn {
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 3px;
  margin-left: 16px;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
}
.site-header nav a {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 5px;
}
.site-header nav a:hover {
  color: var(--accent);
}
.site-header .language {
  border-left: 1px solid var(--line);
  padding-left: 25px;
}
.github-link svg {
  width: 16px;
  height: 16px;
}
.hero {
  width: 100%;
  min-height: 675px;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  position: relative;
  padding: 62px 5% 88px;
  background: #eee9de;
  overflow: hidden;
}
.eyebrow {
  font-size: 10px;
  letter-spacing: 2px;
  line-height: 1.7;
  font-weight: 500;
  color: var(--muted);
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(76px, 8.2vw, 126px);
  font-weight: 400;
  line-height: 0.99;
  letter-spacing: -6px;
  margin: 28px 0 30px;
}
.title-cn {
  font-size: 20px;
  letter-spacing: 7px;
  display: inline-block;
  margin-left: 24px;
  vertical-align: baseline;
}
.hero-intro {
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.65;
  margin-bottom: 27px;
}
.text-link {
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 20px;
  padding: 10px 0;
  border-bottom: 1px solid var(--ink);
}
.text-link svg {
  transition: transform 0.2s;
}
.text-link:hover svg {
  transform: translateX(4px);
}
.hero-visual {
  height: 520px;
  position: relative;
  align-self: center;
  max-width: 670px;
}
.hero-book {
  position: absolute;
  display: block;
  box-shadow:
    0 12px 22px #2b2c241c,
    0 1px 2px #2b2c2422;
  transform: rotate(var(--rotation));
  animation: arrive 0.8s ease both;
  transition:
    transform 0.35s,
    box-shadow 0.35s;
}
.hero-book:hover {
  transform: rotate(0deg) translateY(-8px);
  box-shadow: 0 20px 30px #2b2c2422;
}
.hero-book-0 {
  width: 32%;
  left: 1%;
  top: 29%;
  --rotation: -11deg;
  animation-delay: 0.08s;
}
.hero-book-1 {
  width: 43%;
  left: 25%;
  top: 8%;
  --rotation: 0deg;
  z-index: 2;
  animation-delay: 0.18s;
}
.hero-book-2 {
  width: 32%;
  right: 1%;
  top: 29%;
  --rotation: 11deg;
  animation-delay: 0.28s;
}
.hero-note {
  position: absolute;
  bottom: 0;
  left: 25%;
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--muted);
}
.hero-bottom {
  position: absolute;
  left: 5%;
  right: 5%;
  bottom: 25px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 9px;
  letter-spacing: 1.2px;
  color: var(--muted);
}
.section-pad {
  padding: 100px 5%;
}
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 40px;
}
.section-heading h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 3.5vw, 48px);
  font-weight: 400;
  line-height: 1.4;
  margin-top: 14px;
  letter-spacing: -1.3px;
}
.section-heading > p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
}
.collection-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 15px 0;
  margin-bottom: 35px;
  font-size: 12px;
  color: var(--muted);
}
.filters {
  display: flex;
  gap: 24px;
}
.filters button {
  padding: 10px 0;
  position: relative;
  min-height: 44px;
  font-size: 12px;
  color: var(--muted);
}
.filters button[aria-pressed='true'] {
  color: var(--ink);
}
.filters button[aria-pressed='true']:after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: var(--ink);
}
.books {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 48px 30px;
}
.book-image {
  position: relative;
  box-shadow: 0 3px 8px #25251c12;
  transition:
    transform 0.3s,
    box-shadow 0.3s;
  aspect-ratio: 2/3;
}
.book-image img {
  width: 100%;
  height: auto;
}
.book-link:hover .book-image {
  transform: translateY(-7px);
  box-shadow: 0 12px 18px #25251c1a;
}
.book-open {
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 26px;
  height: 26px;
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
}
.book-link:hover .book-open,
.book-link:focus-visible .book-open {
  opacity: 1;
}
.book-caption {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}
.book-number {
  font-size: 9px;
  color: var(--muted);
  padding-top: 4px;
}
.book-caption h3 {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
}
.book-caption p {
  font-size: 10px;
  line-height: 1.6;
  margin-top: 6px;
  color: var(--muted);
}
.method {
  background: #eae5d9;
  border-top: 1px solid var(--line);
}
.method-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 65px;
  margin-top: 60px;
}
.method-steps > div {
  border-top: 1px solid #c7c1b3;
  padding-top: 24px;
}
.method-steps span {
  font-size: 11px;
  color: var(--accent);
}
.method-steps h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  margin: 20px 0 15px;
}
.method-steps p {
  font-size: 13px;
  line-height: 2.1;
  color: #62665e;
  max-width: 340px;
}
.skill-section {
  background: #303b34;
  color: var(--paper);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
}
.skill-section .eyebrow {
  color: #babeb0;
}
.skill-section h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 3.4vw, 46px);
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: -1px;
  margin: 18px 0 25px;
}
.skill-copy > p:not(.eyebrow) {
  font-size: 13px;
  line-height: 2;
  color: #c3c7bb;
  max-width: 440px;
}
.skill-section .text-link {
  border-color: #b4baaa;
  margin-top: 25px;
}
.skill-install {
  align-self: center;
  border-top: 1px solid #64705f;
  padding-top: 20px;
  min-width: 0;
}
.install-label {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: #bec5b6;
}
.skill-install pre {
  font:
    12px/2.1 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  margin: 25px 0 18px;
  color: #f0edde;
}
.copy-button {
  font-size: 11px;
  border: 1px solid currentColor;
  padding: 10px 15px;
  min-height: 40px;
  opacity: 0.85;
}
.copy-button:hover {
  opacity: 1;
}
.skill-example {
  font-size: 12px;
  line-height: 2.1;
  margin: 28px 0 18px;
  color: #ccd0c3;
}
.skill-example code {
  font-family: inherit;
}
.skill-install small {
  font-size: 10px;
  line-height: 1.8;
  color: #b3bcaa;
  display: block;
}
.install-resources {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  margin: 20px 0;
  font-size: 11px;
}
.install-resources a {
  text-underline-offset: 4px;
}
.install-cli {
  border-top: 1px solid #64705f;
  padding-top: 15px;
  font-size: 11px;
}
.install-cli summary {
  cursor: pointer;
}
.site-footer {
  padding: 40px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  border-top: 1px solid var(--line);
  font-size: 10px;
  line-height: 1.9;
  color: var(--muted);
}
.footer-name {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
}
.footer-name span {
  font-size: 12px;
  margin-left: 8px;
}
.site-footer a > svg {
  width: 12px;
  height: 12px;
  vertical-align: -2px;
}
.site-footer a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.detail-main {
  padding: 30px 5% 80px;
}
.back-link {
  font-size: 12px;
  color: var(--muted);
  display: inline-block;
  padding: 12px 0;
}
.detail-layout {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 7%;
  margin: 25px 0 70px;
  align-items: start;
}
.detail-display {
  background: #eae5d9;
  padding: 26px 50px 30px;
  display: flex;
  align-items: center;
  flex-direction: column;
}
.display-modes {
  display: flex;
  gap: 25px;
  font-size: 11px;
  margin-bottom: 26px;
}
.display-modes button {
  padding: 12px 0;
  min-height: 44px;
  color: var(--muted);
  border-bottom: 1px solid transparent;
}
.display-modes button[aria-pressed='true'] {
  border-color: var(--ink);
  color: var(--ink);
}
#cover-preview {
  width: 100%;
  max-width: 370px;
  height: auto;
  box-shadow: 0 8px 20px #28271f1a;
}
.display-caption {
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--muted);
  margin-top: 24px;
}
.detail-copy {
  padding-top: 36px;
  min-width: 0;
}
.detail-copy h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(34px, 3.4vw, 52px);
  line-height: 1.4;
  letter-spacing: -1.5px;
  margin: 15px 0;
}
.detail-subtitle {
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}
.detail-subtitle span {
  margin: 0 8px;
}
.detail-mood {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.7;
  margin: 36px 0 18px;
}
.detail-concept {
  font-size: 14px;
  line-height: 2;
  color: #595f56;
  max-width: 470px;
}
.detail-restraint {
  font-size: 12px;
  line-height: 1.9;
  color: var(--muted);
  margin-top: 20px;
}
.palette {
  display: flex;
  gap: 22px;
  margin: 28px 0;
  font-size: 9px;
  color: var(--muted);
  font-family: ui-monospace, monospace;
}
.palette span {
  display: flex;
  align-items: center;
  gap: 7px;
}
.palette i {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
}
.download-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 11px;
  border-top: 1px solid var(--line);
  padding-top: 25px;
}
.download-primary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--ink);
  color: var(--paper);
  padding: 17px 20px;
  font-size: 13px;
  transition: background 0.2s;
}
.download-primary:hover {
  background: #4b554a;
}
.edition-note {
  font-size: 10px;
  line-height: 1.9;
  color: var(--muted);
  margin: 24px 0;
}
.prompt-details {
  border-top: 1px solid var(--line);
  padding-top: 6px;
}
.prompt-details summary {
  cursor: pointer;
  font-size: 12px;
  padding: 16px 0;
}
.prompt-details p {
  font-size: 11px;
  line-height: 1.9;
  color: var(--muted);
  margin: 14px 0;
}
.prompt-details pre {
  font:
    11px/1.9 ui-monospace,
    SFMono-Regular,
    monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 360px;
  overflow: auto;
  background: #ebe6da;
  padding: 18px;
  margin: 20px 0;
}
.prompt-details h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 400;
  margin-top: 30px;
}
.prompt-details > a {
  font-size: 11px;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.prompt-file {
  margin-left: 15px;
}
.book-pagination {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  border-top: 1px solid var(--line);
  padding-top: 30px;
}
.book-pagination a {
  max-width: 45%;
}
.book-pagination a:last-child {
  text-align: right;
}
.book-pagination small {
  display: block;
  font-size: 10px;
  color: var(--muted);
  margin-bottom: 12px;
}
.book-pagination span {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.5;
}
.hero-book img {
  width: 100%;
  height: auto;
}
@keyframes arrive {
  from {
    opacity: 0;
    translate: 0 18px;
  }
  to {
    opacity: 1;
    translate: 0 0;
  }
}
@media (min-width: 1600px) {
  .hero {
    padding-left: calc((100vw - 1440px) / 2);
    padding-right: calc((100vw - 1440px) / 2);
  }
  .section-pad {
    padding-left: calc((100vw - 1440px) / 2);
    padding-right: calc((100vw - 1440px) / 2);
  }
}
@media (max-width: 1100px) {
  .hero {
    min-height: 610px;
    grid-template-columns: 0.9fr 1.1fr;
    padding-top: 60px;
  }
  .hero-visual {
    height: 430px;
  }
  .hero h1 {
    font-size: 88px;
  }
  .title-cn {
    font-size: 17px;
    margin-left: 12px;
  }
  .hero-intro {
    font-size: 21px;
  }
  .books {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 45px 35px;
  }
  .method-steps {
    gap: 35px;
  }
  .skill-section {
    gap: 50px;
  }
  .detail-display {
    padding: 22px 30px;
  }
  .detail-layout {
    gap: 5%;
  }
  .detail-copy {
    padding-top: 20px;
  }
  .detail-copy h1 {
    font-size: 36px;
  }
  .detail-mood {
    font-size: 20px;
    margin-top: 25px;
  }
  .detail-concept {
    font-size: 13px;
  }
  .site-footer {
    flex-wrap: wrap;
  }
}
@media (max-width: 700px) {
  .site-header {
    height: 72px;
    padding: 0 6%;
  }
  .brand {
    font-size: 20px;
    gap: 8px;
  }
  .brand-cn {
    display: none;
  }
  .site-header nav {
    gap: 18px;
  }
  .site-header .nav-method,
  .site-header .nav-collection {
    display: none;
  }
  .site-header .language {
    padding-left: 17px;
  }
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 40px 6% 62px;
  }
  .hero h1 {
    font-size: 84px;
    letter-spacing: -4px;
    line-height: 1;
    margin: 20px 0;
  }
  .title-cn {
    font-size: 20px;
    margin-left: 20px;
  }
  .hero-intro {
    font-size: 19px;
    line-height: 1.7;
    margin-bottom: 12px;
  }
  .hero-intro br {
    display: none;
  }
  .hero .text-link {
    font-size: 12px;
  }
  .hero-visual {
    width: 100%;
    height: 330px;
    max-width: 430px;
    justify-self: center;
    margin-top: 15px;
  }
  .hero-book-0 {
    top: 29%;
    left: 3%;
    width: 31%;
  }
  .hero-book-1 {
    top: 8%;
    left: 28%;
    width: 43%;
  }
  .hero-book-2 {
    top: 30%;
    right: 1%;
    width: 31%;
  }
  .hero-note {
    font-size: 8px;
    left: 28%;
    bottom: 2px;
  }
  .hero-bottom {
    font-size: 8px;
    left: 6%;
    right: 6%;
    bottom: 20px;
  }
  .hero-bottom span:last-child {
    display: none;
  }
  .section-pad {
    padding: 65px 6%;
  }
  .section-heading {
    display: block;
    margin-bottom: 28px;
  }
  .section-heading h2 {
    font-size: 31px;
    letter-spacing: -1px;
    margin-top: 12px;
  }
  .section-heading > p {
    margin-top: 16px;
    font-size: 12px;
  }
  .collection-toolbar {
    margin-bottom: 24px;
    font-size: 10px;
  }
  .filters {
    gap: 20px;
  }
  .filters button {
    font-size: 11px;
  }
  .books {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 24px;
  }
  .book-caption {
    gap: 8px;
    margin-top: 15px;
  }
  .book-caption h3 {
    font-size: 14px;
    line-height: 1.6;
  }
  .book-number {
    font-size: 8px;
  }
  .book-caption p {
    font-size: 9px;
  }
  .method-steps {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-top: 35px;
  }
  .method-steps > div {
    padding-top: 18px;
  }
  .method-steps h3 {
    font-size: 20px;
    margin: 13px 0 10px;
  }
  .method-steps p {
    max-width: none;
    font-size: 13px;
  }
  .skill-section {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .skill-section h2 {
    font-size: 32px;
  }
  .skill-install pre {
    font-size: 11px;
  }
  .site-footer {
    display: block;
    padding: 35px 6%;
  }
  .site-footer > p {
    margin-top: 20px;
  }
  .detail-main {
    padding: 20px 6% 50px;
  }
  .detail-layout {
    grid-template-columns: 1fr;
    margin-top: 20px;
    gap: 25px;
    margin-bottom: 50px;
  }
  .detail-display {
    padding: 15px 30px 24px;
  }
  .display-modes {
    margin-bottom: 18px;
  }
  .display-caption {
    font-size: 7px;
  }
  #cover-preview {
    max-width: 300px;
  }
  .detail-copy {
    padding-top: 10px;
  }
  .detail-copy h1 {
    font-size: 36px;
  }
  .detail-mood {
    font-size: 21px;
  }
  .detail-concept {
    font-size: 14px;
  }
  .book-pagination span {
    font-size: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *:before,
  *:after {
    animation: none !important;
    transition: none !important;
  }
}

/* Three deliverables, one quiet index. */
.deliverables {
  margin-top: 2.4rem;
  border-top: 1px solid var(--line, #d7d5c9);
}
.deliverables > h2 {
  font-size: 1rem;
  font-weight: 500;
  margin: 1.4rem 0 0.5rem;
}
.delivery-row {
  display: grid;
  grid-template-columns: 1.8rem minmax(0, 1fr) auto;
  gap: 0.6rem;
  align-items: center;
  padding: 1.05rem 0;
}
.delivery-number {
  font-size: 0.67rem;
  color: #7b7b70;
  align-self: start;
  padding-top: 0.2rem;
}
.delivery-row h3 {
  font-size: 0.98rem;
  font-weight: 500;
  margin: 0 0 0.3rem;
}
.delivery-row p {
  margin: 0;
  font-size: 0.72rem;
  color: #686d62;
  line-height: 1.6;
}
.delivery-row > a {
  font-size: 0.78rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.delivery-row svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.3;
}
.delivery-row .copy-button {
  margin: 0;
  font-size: 0.74rem;
  max-width: 9rem;
}
.other-language-download {
  display: block;
  margin: -0.3rem 0 0.3rem 2.4rem;
  font-size: 0.72rem;
  color: #686d62;
}
@media (max-width: 400px) {
  .delivery-row {
    grid-template-columns: 1.3rem minmax(0, 1fr) auto;
    gap: 0.35rem;
  }
  .delivery-row .copy-button {
    padding: 0.55rem 0.4rem;
  }
}