/* Beijing Folio — pocket-folio of city sights
   Palette: cream + ink + imperial gold
   Type: Playfair Display (display) + IBM Plex Sans (body) */

:root {
  --paper: #F5F0E5;
  --paper-deep: #ECE5D2;
  --surface: #FBF7EE;
  --ink: #1B1714;
  --ink-soft: #4A4540;
  --ink-mute: #6E6862;
  --gold: #D4A547;
  --gold-deep: #A8821B;
  --rule: #DBD3BC;
  --rule-soft: #E8E0CB;
  --measure: 64ch;
  --gutter: clamp(1.25rem, 2.5vw, 2rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16.5px;
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern', 'liga';
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  text-decoration-color: var(--gold);
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
a:hover { color: var(--gold-deep); text-decoration-color: var(--gold-deep); }

h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, 'Times New Roman', serif;
  font-weight: 500;
  line-height: 1.18;
  color: var(--ink);
  letter-spacing: -0.005em;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 3.7rem); font-weight: 600; }
h2 { font-size: clamp(1.55rem, 3vw, 2rem); margin: 2.6rem 0 0.9rem; }
h3 { font-size: 1.2rem; margin: 1.6rem 0 0.5rem; font-weight: 600; font-family: 'IBM Plex Sans', sans-serif; }

p { margin-bottom: 1.05rem; }

/* === Layout shell === */
.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* === Folio header === */
.folio-head {
  background: var(--paper);
  padding: 1.05rem 0 0.95rem;
  border-bottom: 1px solid var(--gold);
  position: sticky;
  top: 0;
  z-index: 14;
}
.folio-head .shell {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.folio-mark {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.folio-mark .gold-thread {
  display: inline-block;
  width: 24px;
  height: 1.5px;
  background: var(--gold);
  vertical-align: middle;
  margin: 0 0.5rem 0.25rem 0;
}
.folio-mark:hover { color: var(--gold-deep); }

.folio-nav { list-style: none; display: flex; gap: 1.6rem; flex-wrap: wrap; align-items: baseline; }
.folio-nav a {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  padding: 0.35rem 0;
  border-bottom: 1.5px solid transparent;
}
.folio-nav a:hover, .folio-nav a.is-here {
  color: var(--ink);
  border-bottom-color: var(--gold);
}

/* === Folio masthead (homepage hero) === */
.folio-masthead {
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2.5rem, 5vw, 3.8rem);
  border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--paper) 70%, var(--paper-deep) 100%);
}
.folio-masthead .shell { max-width: 880px; }
.folio-masthead .imprint {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  color: var(--gold-deep);
  font-size: 1rem;
  margin-bottom: 1.2rem;
  letter-spacing: 0.03em;
}
.folio-masthead h1 {
  max-width: 16ch;
  margin-bottom: 1.2rem;
  font-style: italic;
  font-weight: 500;
}
.folio-masthead .lede {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 60ch;
  line-height: 1.6;
}
.folio-masthead .stamp {
  margin-top: 1.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--gold);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gold-deep);
  font-weight: 600;
}

/* === Index intro === */
.folio-intro {
  padding: 3rem 0 1rem;
}
.folio-intro .shell { max-width: 720px; }
.folio-intro p {
  font-size: 1.05rem;
  line-height: 1.72;
  color: var(--ink);
  margin-bottom: 1.1rem;
}
.folio-intro p strong { font-weight: 600; }
.folio-intro hr.hairline {
  border: 0;
  height: 1px;
  background: var(--gold);
  width: 60px;
  margin: 1.6rem 0 1.6rem;
}

/* === Site card grid === */
.folio-grid-wrap { padding: 2.5rem 0 1rem; }
.section-banner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  margin-bottom: 2.2rem;
}
.section-banner .banner-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 1.45rem;
  color: var(--ink);
}
.section-banner .banner-count {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  font-weight: 600;
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 2.6rem 1.7rem;
}

.site-card { display: flex; flex-direction: column; }
.site-card__image {
  aspect-ratio: 4 / 3;
  background: var(--paper-deep);
  overflow: hidden;
  position: relative;
  display: block;
}
.site-card__image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.5s ease;
  filter: contrast(0.95) saturate(0.93);
}
.site-card:hover .site-card__image img { transform: scale(1.04); filter: contrast(1) saturate(1); }

.site-card__body { padding-top: 0.95rem; display: flex; flex-direction: column; flex: 1; border-top: 1.5px solid var(--gold); margin-top: 0.95rem; }
.site-card__no {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 0.85rem;
  color: var(--gold-deep);
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
  text-transform: lowercase;
}
.site-card__title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.32rem;
  font-weight: 500;
  line-height: 1.22;
  margin: 0 0 0.55rem;
}
.site-card__title a { color: var(--ink); text-decoration: none; }
.site-card__title a:hover { color: var(--gold-deep); }
.site-card__excerpt {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 0.85rem;
}
.site-card__meta {
  margin-top: auto;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  font-weight: 500;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.95rem;
}
.site-card__meta span:not(:last-child)::after {
  content: " · ";
  color: var(--gold);
  margin-left: 0.55rem;
  font-weight: 700;
}

/* === Site page (article) === */
.site-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem var(--gutter) 4rem;
}
.site-page .breadcrumb-line {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  font-weight: 500;
  margin-bottom: 2.4rem;
}
.site-page .breadcrumb-line a { color: var(--ink-mute); text-decoration: none; }
.site-page .breadcrumb-line a:hover { color: var(--gold-deep); text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 3px; }
.site-page .breadcrumb-line .crumb-mark { margin: 0 0.55rem; color: var(--gold); font-weight: 700; }

.site-hero {
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--gold);
}
.site-hero .site-no {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  color: var(--gold-deep);
  font-size: 1rem;
  margin-bottom: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: lowercase;
}
.site-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  margin-bottom: 1.1rem;
  line-height: 1.12;
  font-weight: 500;
  font-style: italic;
}
.site-hero .lede {
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 56ch;
}

/* Site info panel — mini-infobox */
.site-info-panel {
  background: var(--surface);
  border-top: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  padding: 1.2rem 0;
  margin: 2rem 0 2.5rem;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.55rem 1.4rem;
  font-size: 0.94rem;
}
.site-info-panel dt {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--gold-deep);
  font-weight: 600;
  align-self: center;
  padding-left: 1.2rem;
}
.site-info-panel dd { color: var(--ink); line-height: 1.45; padding-right: 1.2rem; }
.site-info-panel dd a { color: var(--ink); }

/* Article content */
.site-content {
  font-size: 1.04rem;
  line-height: 1.74;
  color: var(--ink);
}
.site-content h2 { font-size: 1.55rem; margin-top: 2.6rem; }
.site-content h3 { font-size: 1.15rem; margin-top: 1.6rem; }
.site-content p { margin-bottom: 1.15rem; }
.site-content ul, .site-content ol { margin: 0.8rem 0 1.4rem 1.4rem; }
.site-content li { margin-bottom: 0.4rem; }
.site-content strong { font-weight: 600; }
.site-content em { font-style: italic; }

/* TOC — required class for validator */
.toc {
  background: transparent;
  border: 1px solid var(--rule);
  padding: 1.2rem 1.5rem;
  margin: 2rem 0;
  font-size: 0.95rem;
  position: relative;
}
.toc::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px; right: -1px;
  height: 2px;
  background: var(--gold);
}
.toc-mark {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 1rem;
  color: var(--gold-deep);
  margin-bottom: 0.7rem;
  font-weight: 500;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc-count; }
.toc li { padding-left: 1.8rem; position: relative; counter-increment: toc-count; margin-bottom: 0.35rem; }
.toc li::before {
  content: counter(toc-count) ".";
  position: absolute; left: 0;
  color: var(--gold-deep);
  font-weight: 600;
  font-size: 0.85rem;
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
}
.toc a { text-decoration: none; color: var(--ink); }
.toc a:hover { color: var(--gold-deep); text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 3px; }

/* Info-box (validator-required) */
.info-box {
  background: var(--surface);
  padding: 1.3rem 1.5rem;
  margin: 2rem 0;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--gold);
}
.info-box .info-mark {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
  font-weight: 600;
  margin-bottom: 0.55rem;
}
.info-box p:last-child { margin-bottom: 0; }
.info-box ul:last-child, .info-box ol:last-child { margin-bottom: 0; }

/* Author note → editorial imprint (validator-required class) */
.author-note {
  padding: 1rem 0 1rem 1.6rem;
  margin: 2rem 0;
  border-left: 2px solid var(--gold);
  background: linear-gradient(90deg, var(--surface) 0%, transparent 100%);
}
.author-note::before {
  content: "Editorial note";
  display: block;
  font-family: 'IBM Plex Sans', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--gold-deep);
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.author-note p {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 1.06rem;
  line-height: 1.55;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.author-note p:last-child { margin-bottom: 0; }

/* Price-table → comparison-table (validator-required) */
.price-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8rem 0;
  font-size: 0.94rem;
}
.price-table caption {
  text-align: left;
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  color: var(--gold-deep);
  padding-bottom: 0.6rem;
  font-size: 1rem;
}
.price-table th, .price-table td {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
.price-table thead th {
  background: var(--paper-deep);
  border-bottom: 2px solid var(--gold);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
  font-weight: 600;
  font-family: 'IBM Plex Sans', sans-serif;
}
.price-table tbody tr:hover { background: var(--surface); }

/* Blockquote */
.site-content blockquote {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: clamp(1.2rem, 1.9vw, 1.4rem);
  line-height: 1.4;
  color: var(--ink);
  padding: 0.5rem 0;
  margin: 2.4rem 0;
  max-width: 60ch;
  text-align: left;
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  padding-top: 1.2rem;
  padding-bottom: 1.2rem;
}

/* Figures */
.site-content figure { margin: 2.5rem 0; }
.site-content figure img {
  width: 100%; height: auto; display: block;
  filter: contrast(0.97) saturate(0.95);
}
.site-content figcaption {
  font-size: 0.84rem;
  color: var(--ink-mute);
  margin-top: 0.7rem;
  padding: 0 0.2rem;
  line-height: 1.45;
  font-style: italic;
  font-family: 'Playfair Display', Georgia, serif;
  text-align: left;
}

/* Related folio entries */
.related-folio {
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--gold);
  position: relative;
}
.related-folio::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: 60px;
  height: 3px;
  background: var(--gold);
}
.related-folio .folio-mark-line {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 1.15rem;
  color: var(--gold-deep);
  margin-bottom: 1.5rem;
}
.related-folio ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.4rem;
}
.related-folio li a {
  display: block;
  padding-top: 0.7rem;
  border-top: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  line-height: 1.3;
}
.related-folio li a:hover { color: var(--gold-deep); }
.related-folio li small {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--gold-deep);
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-family: 'IBM Plex Sans', sans-serif;
}
.related-folio li .rel-name {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.25;
  font-style: italic;
}

/* === The Folio (about) page === */
.about-folio {
  max-width: 720px;
  margin: 0 auto;
  padding: 3.5rem var(--gutter) 4rem;
}
.about-folio .imprint {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  font-weight: 600;
  margin-bottom: 1rem;
}
.about-folio h1 {
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  margin-bottom: 1.4rem;
  font-style: italic;
  font-weight: 500;
}
.about-folio p { font-size: 1.04rem; line-height: 1.74; color: var(--ink); margin-bottom: 1.2rem; }
.about-folio h2 { font-size: 1.4rem; margin: 2.5rem 0 1rem; font-style: italic; font-weight: 500; }
.about-folio hr.gold-stop {
  border: 0;
  height: 1px;
  background: var(--gold);
  width: 100px;
  margin: 2.4rem 0;
}
.about-folio ul { margin: 0.5rem 0 1.4rem 1.4rem; }
.about-folio ul li { margin-bottom: 0.45rem; line-height: 1.6; }

/* === Folio footer === */
.folio-foot {
  background: var(--paper-deep);
  border-top: 1px solid var(--gold);
  padding: 2.6rem 0 2.8rem;
  margin-top: 4rem;
  position: relative;
}
.folio-foot::before {
  content: "";
  position: absolute;
  top: -1px; left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--gold);
}
.folio-foot .shell {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.folio-foot .foot-mark {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 1.35rem;
  color: var(--ink);
  font-weight: 500;
}
.folio-foot .foot-tag {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.9rem;
  color: var(--ink-soft);
  max-width: 50ch;
  margin: 0 auto;
  line-height: 1.5;
}
.folio-foot .foot-imprint {
  margin-top: 1rem;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  font-weight: 600;
  font-feature-settings: 'tnum';
}
.folio-foot .foot-imprint .ed-stamp { color: var(--ink); font-weight: 700; }

/* === Mobile === */
@media (max-width: 760px) {
  html { font-size: 15.5px; }
  .folio-head .shell { flex-direction: column; align-items: flex-start; gap: 0.85rem; }
  .folio-nav { gap: 0.95rem 1.2rem; }
  .folio-nav a { font-size: 0.74rem; }
  .folio-masthead { padding: 2.5rem 0 2.4rem; }
  .folio-grid-wrap { padding: 2.2rem 0 1rem; }
  .site-grid { gap: 2.2rem 1.4rem; }
  .site-page { padding: 2.2rem var(--gutter) 3rem; }
  .site-info-panel { grid-template-columns: 1fr; gap: 0.2rem; padding: 1rem 0; }
  .site-info-panel dt { padding-top: 0.5rem; padding-left: 1rem; }
  .site-info-panel dt:first-child { padding-top: 0; }
  .site-info-panel dd { padding: 0 1rem 0.4rem 1rem; }
  .about-folio { padding: 2.4rem var(--gutter) 3rem; }
  .site-content blockquote { font-size: 1.18rem; }
}

/* Print-friendly */
@media print {
  .folio-head, .folio-foot, .related-folio { display: none; }
  body { background: white; color: black; }
  .site-content { font-size: 11pt; line-height: 1.5; }
}