/* ============================================================
   VARIANT A — "Paper & Ink, Edition II"
   A book, not a SaaS. Editorial layout: masthead, title page,
   table of contents, numbered chapters, figures, colophon.
   Palette mirrored from ui/theme/Color.kt (light).
   Zero JS · zero webfonts · zero external requests.
   ============================================================ */

:root {
  --paper-bright: #fdfbf6;
  --paper: #f8f4ec;
  --paper-deep: #f0e9db;
  --ink: #1d1812;
  --ink-soft: #5c5547;
  --ink-faint: #8e8674;
  --hairline: #e5dccb;
  --vermilion: #6b3a5b;
  --vermilion-deep: #4a2740;
  --on-vermilion: #fdf5fa;
  --moss: #5f7150;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  --shell: 1080px;
  --margin-col: 168px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper-bright);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  /* faint laid-paper texture, pure CSS */
  background-image:
    repeating-linear-gradient(0deg, rgba(29, 24, 18, 0.014) 0 1px, transparent 1px 28px);
}

.shell { width: min(100% - 3rem, var(--shell)); margin-inline: auto; }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 0.45em; }
p { margin: 0 0 1em; max-width: 66ch; }
a { color: var(--vermilion); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--vermilion-deep); }

.smallcaps {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---- Masthead: a newspaper head, not an app bar ------------------ */

header.masthead {
  border-bottom: 3px double var(--ink);
  background: var(--paper-bright);
}

.masthead-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;
  gap: 1rem;
  padding: 1.2rem 0 1rem;
}

.masthead-side { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-faint); }
.masthead-side.right { text-align: right; }

.wordmark { justify-self: center; display: inline-flex; align-items: center; text-decoration: none; }
.wordmark img { display: block; height: 36px; width: auto; }

nav.toc-bar {
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem 2rem;
  padding: 0.65rem 0;
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
nav.toc-bar a { color: var(--ink-soft); text-decoration: none; }
nav.toc-bar a:hover { color: var(--vermilion); }

/* ---- Title page --------------------------------------------------- */

.titlepage { padding: clamp(4rem, 10vw, 7.5rem) 0 clamp(3rem, 7vw, 5rem); text-align: center; }

.titlepage .kicker { margin-bottom: 2.2rem; }
.titlepage .kicker::before, .titlepage .kicker::after { content: "— "; letter-spacing: 0; color: var(--hairline); }
.titlepage .kicker::after { content: " —"; }

.titlepage h1 {
  font-size: clamp(3rem, 9.5vw, 6.4rem);
  font-weight: 600;
  letter-spacing: -0.028em;
  margin: 0 auto 0.4em;
  max-width: 14ch;
}
.titlepage h1 em { font-style: italic; color: var(--vermilion); }

.titlepage .rule { width: 96px; height: 4px; background: var(--vermilion); margin: 2.2rem auto; }

.lede {
  font-size: clamp(1.15rem, 2.3vw, 1.4rem);
  color: var(--ink-soft);
  max-width: 46ch;
  margin-inline: auto;
  font-style: italic;
}

.actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 2.6rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.9rem;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid var(--ink);
}
.btn-primary { background: var(--ink); color: var(--paper-bright); }
.btn-primary:hover { background: var(--vermilion); border-color: var(--vermilion); color: var(--on-vermilion); }
.btn-quiet { color: var(--ink); background: transparent; }
.btn-quiet:hover { border-color: var(--vermilion); color: var(--vermilion); }

.title-note { font-family: var(--sans); font-size: 0.85rem; color: var(--ink-faint); margin-top: 1.6rem; }
.title-note .ios { border: 1px solid var(--hairline); border-radius: 999px; padding: 0.2rem 0.75rem; margin-left: 0.5rem; white-space: nowrap; }

/* ---- Table of contents ------------------------------------------- */

section.contents { border-top: 1px solid var(--hairline); padding: clamp(2.5rem, 6vw, 4rem) 0; }

.contents-inner { max-width: 620px; margin-inline: auto; }
.contents-inner .smallcaps { display: block; text-align: center; margin-bottom: 2rem; }

ol.toc { list-style: none; margin: 0; padding: 0; }
ol.toc li { display: flex; align-items: baseline; gap: 0.8rem; padding: 0.55rem 0; font-size: 1.06rem; }
ol.toc .num { font-family: var(--sans); font-size: 0.78rem; font-weight: 600; color: var(--vermilion); width: 2rem; flex: none; }
ol.toc a { color: var(--ink); text-decoration: none; }
ol.toc a:hover { color: var(--vermilion); }
ol.toc .leader { flex: 1; border-bottom: 1px dotted var(--ink-faint); transform: translateY(-4px); }
ol.toc .page { font-family: var(--sans); font-size: 0.8rem; color: var(--ink-faint); }

/* ---- Chapters ----------------------------------------------------- */

section.chapter { border-top: 1px solid var(--hairline); padding: clamp(3.2rem, 8vw, 5.5rem) 0; }

.chapter-grid {
  display: grid;
  grid-template-columns: var(--margin-col) minmax(0, 1fr);
  gap: 2.5rem;
}

.chapter-marker { text-align: right; }
.chapter-marker .roman {
  display: block;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 5vw, 3.6rem);
  line-height: 1;
  color: var(--paper-deep);
  -webkit-text-stroke: 1px var(--ink-faint);
  font-weight: 700;
}
.chapter-marker .smallcaps { display: block; margin-top: 0.9rem; }

.chapter h2 { font-size: clamp(2rem, 4.6vw, 3rem); max-width: 18ch; }
.chapter h2 .accent { color: var(--vermilion); }

.chapter .opening { font-size: 1.12rem; }
.chapter .opening::first-letter {
  font-size: 3.4em;
  float: left;
  line-height: 0.82;
  padding: 0.07em 0.12em 0 0;
  color: var(--vermilion);
  font-weight: 600;
}

/* Feature entries: an index, not a card grid */
dl.entries { margin: 2.4rem 0 0; display: grid; gap: 0; }
dl.entries > div { display: grid; grid-template-columns: minmax(180px, 240px) 1fr; gap: 1.4rem; padding: 1.15rem 0; border-top: 1px solid var(--hairline); }
dl.entries dt { font-weight: 600; font-size: 1.08rem; margin: 0; }
dl.entries dt .idx { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; color: var(--vermilion); display: block; letter-spacing: 0.18em; margin-bottom: 0.25rem; }
dl.entries dd { margin: 0; color: var(--ink-soft); font-size: 1rem; max-width: 58ch; }

/* Pull statement */
.pull {
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.3;
  font-style: italic;
  max-width: 26ch;
  margin: 0;
  padding-left: 1.4rem;
  border-left: 4px solid var(--vermilion);
}
.pull .attr { display: block; font-style: normal; font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); margin-top: 1.2rem; }

/* ---- Plates (figures) --------------------------------------------- */

.plates { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 2.4rem; margin-top: 2.6rem; }

figure.plate { margin: 0; }
figure.plate .frame {
  border: 1px solid var(--hairline);
  background: var(--paper);
  padding: 0.9rem;
  box-shadow: 4px 4px 0 var(--paper-deep);
}
figure.plate img { display: block; width: 100%; height: auto; border: 1px solid var(--hairline); }
figure.plate figcaption { font-style: italic; font-size: 0.92rem; color: var(--ink-soft); margin-top: 0.85rem; }
figure.plate figcaption b { font-style: normal; font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--vermilion); margin-right: 0.5rem; }

.plate-note { font-family: var(--sans); font-size: 0.8rem; color: var(--ink-faint); margin-top: 1.8rem; }

/* ---- Appendix table ----------------------------------------------- */

.table-wrap { overflow-x: auto; margin-top: 2.4rem; border: 1px solid var(--hairline); background: var(--paper); }
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 0.98rem; }
caption { caption-side: top; text-align: left; padding: 1rem 1.2rem 0.4rem; font-style: italic; color: var(--ink-soft); }
th, td { text-align: left; padding: 0.9rem 1.2rem; border-top: 1px solid var(--hairline); vertical-align: top; }
thead th { font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); font-weight: 600; border-top: none; }
tbody th { font-weight: 600; width: 30%; }
td { color: var(--ink-soft); }

/* ---- Price: a bookplate ------------------------------------------- */

.bookplate {
  margin-top: 2.6rem;
  max-width: 460px;
  border: 1px solid var(--ink);
  outline: 1px solid var(--ink);
  outline-offset: 4px;
  background: var(--paper);
  padding: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
}
.bookplate .figure { font-size: clamp(3.4rem, 8vw, 4.6rem); line-height: 1; letter-spacing: -0.03em; }
.bookplate .figure sup { font-size: 0.35em; vertical-align: 1.4em; color: var(--vermilion); }
.bookplate .terms { font-family: var(--sans); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); margin: 0.9rem 0 1.4rem; }
.bookplate ul { list-style: none; margin: 0 0 1.4rem; padding: 1.1rem 0 0; border-top: 1px solid var(--hairline); text-align: left; }
.bookplate li { padding-left: 1.5rem; position: relative; color: var(--ink-soft); font-size: 0.98rem; margin-bottom: 0.45rem; }
.bookplate li::before { content: "☙"; position: absolute; left: 0; color: var(--vermilion); }
.bookplate .fine { font-family: var(--sans); font-size: 0.78rem; color: var(--ink-faint); margin: 1.1rem 0 0; }

/* ---- Footnotes (FAQ) ---------------------------------------------- */

.footnotes { max-width: 70ch; margin-top: 2rem; counter-reset: fn; }
details { border-top: 1px solid var(--hairline); padding: 1.05rem 0; counter-increment: fn; }
details summary { cursor: pointer; font-weight: 600; font-size: 1.04rem; list-style: none; display: flex; gap: 0.9rem; align-items: baseline; }
details summary::before { content: counter(fn) "."; font-family: var(--sans); font-size: 0.78rem; font-weight: 600; color: var(--vermilion); flex: none; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; margin-left: auto; color: var(--vermilion); font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { margin: 0.8rem 0 0 1.6rem; color: var(--ink-soft); font-size: 0.99rem; }

/* ---- Colophon ------------------------------------------------------ */

footer.colophon {
  border-top: 3px double var(--ink);
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: 2.6rem 0 3.6rem;
  text-align: center;
}
footer.colophon .smallcaps { display: block; margin-bottom: 1rem; }
footer.colophon p { max-width: 52ch; margin-inline: auto; font-style: italic; color: var(--ink-soft); font-size: 0.98rem; }
footer.colophon nav { margin-top: 1.4rem; font-family: var(--sans); font-size: 0.85rem; }
footer.colophon nav a { color: var(--ink-soft); text-decoration: none; margin: 0 0.9rem; }
footer.colophon nav a:hover { color: var(--vermilion); }
footer.colophon .brandmark { width: 44px; height: 44px; margin-bottom: 1.2rem; }

/* ---- Responsive ---------------------------------------------------- */

@media (max-width: 860px) {
  .chapter-grid { grid-template-columns: minmax(0, 1fr); gap: 1.2rem; }
  .chapter-marker { text-align: left; display: flex; align-items: baseline; gap: 1rem; }
  .chapter-marker .smallcaps { margin-top: 0; }
  dl.entries > div { grid-template-columns: 1fr; gap: 0.35rem; }
  .masthead-side { display: none; }
  .masthead-row { grid-template-columns: 1fr; }
}

/* ---- Prose (legal pages) -------------------------------------------- */

.prose { padding: clamp(3rem, 7vw, 5rem) 0; max-width: 72ch; }
.prose .eyebrow { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.24em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 1.1rem; }
.prose .page-title { font-size: clamp(2.2rem, 5vw, 3.2rem); margin-bottom: 0.8em; }
.prose h2 { margin-top: 2.4rem; font-size: 1.5rem; }
.prose p { color: var(--ink-soft); }
.prose ul { color: var(--ink-soft); padding-left: 1.2rem; }
.prose li { margin-bottom: 0.4rem; }
.prose .stamp { color: var(--ink-faint); font-size: 0.92rem; font-family: var(--sans); }
.prose .callout { border: 1px solid var(--vermilion); border-radius: 4px; padding: 1.1rem 1.3rem; background: var(--paper); }
.prose .callout p { margin: 0; color: var(--ink); }