/* Thistle — site styles */

:root {
  color-scheme: light;
  --paper: #f6f7f9;
  --paper-raised: #ffffff;
  --paper-quiet: #fafbfc;
  --ink: #141b26;
  --ink-muted: #545e6e;
  --ink-faint: #8a94a3;
  --rule: #e4e8ed;
  --rule-strong: #d2d8e0;
  --rule-firm: #b4bdc9;
  --accent: #1c2e52;
  --accent-deep: #1c2e52;
  --accent-muted: #6a7a99;
  --wash: #eef1f5;
  --green: #2c6e49;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --page: min(1440px, calc(100vw - 48px));
  --measure: 880px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.tabular { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ---------- Header ---------- */
.site-header {
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  border-bottom: 1px solid var(--rule-strong);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
}
.site-header__inner {
  align-items: center;
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr auto 1fr;
  height: 68px;
  margin: 0 auto;
  width: var(--page);
}
.brand { display: inline-flex; text-decoration: none; width: max-content; }
.brand img { display: block; height: 30px; object-fit: contain; width: 30px; }
.site-nav { display: flex; gap: 1.75rem; }
.site-nav a, .header-link {
  color: var(--ink-faint);
  font-size: .7rem;
  font-weight: 650;
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}
.site-nav a:hover, .header-link:hover, .site-nav a[aria-current] { color: var(--ink); }
.header-link { color: var(--accent); justify-self: end; }

/* ---------- Type primitives ---------- */
.kicker {
  color: var(--ink-faint);
  font-size: .69rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.kicker a { text-decoration: none; }
.kicker a:hover { color: var(--ink); }

.cta {
  align-items: center;
  border: 1px solid var(--ink);
  border-radius: 2px;
  display: inline-flex;
  font-size: .72rem;
  font-weight: 700;
  justify-content: center;
  letter-spacing: .1em;
  min-height: 44px;
  padding: .7rem 1.2rem;
  text-decoration: none;
  text-transform: uppercase;
}
.cta.primary { background: var(--ink); color: var(--paper-raised); }
.cta.primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.cta.secondary { background: transparent; color: var(--ink); }
.cta.secondary:hover { background: var(--paper-raised); }

/* ---------- Page head ---------- */
.page-head {
  align-items: end;
  border-bottom: 1px solid var(--rule-strong);
  display: grid;
  gap: 2rem 4rem;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
  margin: 0 auto;
  padding: 6rem 0 3.5rem;
  width: var(--page);
}
.page-head h1 {
  font-family: var(--serif);
  font-size: clamp(3rem, 6.2vw, 6.4rem);
  font-weight: 500;
  letter-spacing: -.05em;
  line-height: .92;
  margin: 1.1rem 0 0;
  max-width: 12ch;
}
.page-head .subhead {
  color: var(--ink-muted);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  line-height: 1.4;
  margin: 0 0 .4rem;
  max-width: 34ch;
}

/* ---------- Product index strip ---------- */
.product-strip { border-bottom: 1px solid var(--rule); }
.product-strip nav {
  display: flex;
  gap: 0;
  margin: 0 auto;
  overflow-x: auto;
  scrollbar-width: thin;
  width: var(--page);
}
.product-strip a {
  border-bottom: 3px solid transparent;
  color: var(--ink-muted);
  flex: 0 0 auto;
  font-size: .73rem;
  letter-spacing: .04em;
  padding: .85rem .9rem .7rem;
  text-decoration: none;
}
.product-strip a:first-child { padding-left: 0; }
.product-strip a:hover { color: var(--ink); }
.product-strip a[aria-current] { border-bottom-color: var(--accent); color: var(--ink); font-weight: 700; }

/* ---------- Sections ---------- */
.section {
  border-bottom: 1px solid var(--rule-strong);
  display: grid;
  grid-template-columns: .56fr 1.44fr;
  margin: 0 auto;
  width: var(--page);
}
.section:last-of-type { border-bottom: 0; }
.section__head {
  border-right: 1px solid var(--rule-strong);
  padding: 4.5rem clamp(2rem, 5vw, 5rem) 4.5rem 0;
}
.section__head h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.6vw, 3.4rem);
  font-weight: 500;
  letter-spacing: -.04em;
  line-height: 1;
  margin: .7rem 0 0;
}
.section__body { padding: 4.5rem 0 4.5rem clamp(2rem, 5vw, 5rem); }
.section__body > :first-child { margin-top: 0; }
.section__body p {
  color: var(--ink-muted);
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.5;
  margin: 0 0 1.1rem;
  max-width: 58ch;
}
.section__body p strong { color: var(--ink); font-weight: 600; }
.section__body h3 {
  font-size: .72rem;
  letter-spacing: .11em;
  margin: 2.6rem 0 .9rem;
  text-transform: uppercase;
}
.statement {
  color: var(--ink) !important;
  font-family: var(--serif);
  font-size: clamp(1.45rem, 2.5vw, 2.2rem) !important;
  line-height: 1.25 !important;
  max-width: 28ch !important;
}

/* Label / value rows */
.spec { margin: 0 0 1.5rem; max-width: var(--measure); }
.spec-row {
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  display: grid;
  gap: 1rem 2rem;
  grid-template-columns: 11rem 1fr;
  padding: 1.05rem 0;
}
.spec-row:first-child { border-top: 1px solid var(--rule); }
.spec-row > span {
  color: var(--ink-faint);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.spec-row > div { font-family: var(--serif); font-size: 1.08rem; line-height: 1.45; }
.spec-row > div strong { font-weight: 600; }
.spec-row > div a { color: var(--accent); text-underline-offset: 2px; }
.spec-row > div a:hover { color: var(--ink); }
.spec-row > div small {
  color: var(--ink-muted);
  display: block;
  font-family: var(--serif);
  font-size: .98rem;
  margin-top: .25rem;
}

/* Ordered ladder (rate ladder) */
.ladder { counter-reset: rung; list-style: none; margin: 0 0 1.5rem; max-width: var(--measure); padding: 0; }
.ladder li {
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  counter-increment: rung;
  display: grid;
  gap: 1rem;
  grid-template-columns: 2.5rem 9rem 1fr;
  padding: 1rem 0;
}
.ladder li:first-child { border-top: 1px solid var(--rule); }
.ladder li::before {
  color: var(--accent);
  content: counter(rung, decimal-leading-zero);
  font-family: var(--mono);
  font-size: .72rem;
}
.ladder li > span { font-family: var(--serif); font-size: 1.2rem; font-weight: 600; }
.ladder li > div { color: var(--ink-muted); font-family: var(--serif); font-size: 1.05rem; }

/* Limit / caveat block */
.limit {
  background: var(--paper-quiet);
  border-left: 3px solid var(--rule-firm);
  margin: 2rem 0 0;
  max-width: var(--measure);
  padding: .95rem 1.1rem;
}
.limit span { color: var(--ink-faint); display: block; font-size: .61rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.limit p { color: var(--ink) !important; font-size: 1.05rem !important; margin: .3rem 0 0 !important; }

/* Matter map */
.matter-map { display: grid; gap: .5rem; grid-template-columns: repeat(3, 1fr); max-width: var(--measure); }
.matter-map > div {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 2px;
  min-height: 64px;
  padding: .7rem .8rem;
}
.matter-map strong { display: block; font-family: var(--serif); font-size: 1rem; font-weight: 600; }
.matter-map .core {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper-raised);
  display: flex;
  flex-direction: column;
  grid-column: 2;
  grid-row: 1 / span 3;
  justify-content: center;
}
.matter-map .core strong { font-size: 1.5rem; }
.matter-map .core span { color: var(--rule-firm); font-family: var(--mono); font-size: .66rem; letter-spacing: .06em; margin-top: .35rem; }

/* Product overview list */
.index-list { border-top: 1px solid var(--rule-strong); margin: 0 auto; width: var(--page); }
.index-row {
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  display: grid;
  gap: 1rem 3rem;
  grid-template-columns: 3rem minmax(12rem, .5fr) 1.5fr auto;
  padding: 1.6rem 0;
}
.index-row .num { color: var(--ink-faint); font-family: var(--mono); font-size: .7rem; }
.index-row h2 { font-family: var(--serif); font-size: clamp(1.5rem, 2.4vw, 2.1rem); font-weight: 500; letter-spacing: -.03em; line-height: 1.1; margin: 0; }
.index-row p { color: var(--ink-muted); font-family: var(--serif); font-size: 1.12rem; line-height: 1.45; margin: 0; max-width: 60ch; }
.index-row a.more {
  color: var(--accent);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}
.index-row a.more:hover { color: var(--ink); }

/* Prose (philosophy) */
.prose { margin: 0 auto; max-width: 42rem; padding: 4.5rem 0 5rem; width: var(--page); }
.prose p { color: var(--ink-muted); font-family: var(--serif); font-size: 1.25rem; line-height: 1.6; margin: 0 0 1.25rem; }
.prose p.lead { color: var(--ink); font-size: clamp(1.45rem, 2.4vw, 1.9rem); line-height: 1.35; }
.prose p.big { border-left: 3px solid var(--accent); color: var(--ink); font-size: clamp(1.35rem, 2.2vw, 1.7rem); line-height: 1.35; margin: 2.2rem 0; padding-left: 1.2rem; }
.prose h2 {
  border-top: 1px solid var(--rule-strong);
  color: var(--ink-faint);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .13em;
  margin: 3.2rem 0 1.2rem;
  padding-top: 1.4rem;
  text-transform: uppercase;
}
.prose a { color: var(--accent); text-underline-offset: 2px; }

/* Changelog */
.log { margin: 0 auto; padding: 1rem 0 4rem; width: var(--page); }
.log-entry {
  align-items: start;
  border-bottom: 1px solid var(--rule-strong);
  display: grid;
  gap: 2rem 4rem;
  grid-template-columns: 14rem minmax(0, 1fr);
  padding: 3.5rem 0;
}
.log-meta { position: sticky; top: calc(68px + 1.75rem); }
.log-date { color: var(--ink); display: block; font-family: var(--mono); font-size: .8rem; letter-spacing: .04em; }
.log-tag {
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  color: var(--ink-faint);
  display: inline-block;
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .1em;
  margin-top: .7rem;
  padding: .14rem .45rem;
  text-transform: uppercase;
}
.log-body { max-width: 46rem; }
.log-body h2 { font-family: var(--serif); font-size: clamp(1.7rem, 2.8vw, 2.4rem); font-weight: 500; letter-spacing: -.035em; line-height: 1.1; margin: 0 0 1rem; }
.log-body p, .log-body li { color: var(--ink-muted); font-family: var(--serif); font-size: 1.1rem; line-height: 1.55; }
.log-body p { margin: 0 0 .9rem; }
.log-body .entry-lede { color: var(--ink); font-size: 1.25rem; }
.log-body li strong { color: var(--ink); font-weight: 600; }
.log-section { margin-top: 2rem; }
.log-section h3 { font-size: .7rem; letter-spacing: .11em; margin: 0 0 .8rem; text-transform: uppercase; }
.log-body ul { margin: 0 0 .9rem; padding: 0; list-style: none; }
.log-body li { border-top: 1px solid var(--rule); padding: .6rem 0 .6rem 1.2rem; position: relative; }
.log-body li::before { color: var(--rule-firm); content: "—"; left: 0; position: absolute; }

.footnote { color: var(--ink-faint); font-family: var(--mono); font-size: .7rem; line-height: 1.6; margin: 2.5rem 0 0; max-width: 70ch; }

/* Overview highlights */
.proof {
  border-bottom: 1px solid var(--rule-strong);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0 auto;
  width: var(--page);
}
.proof > div { padding: 2.6rem 2rem 2.8rem 0; }
.proof > div + div { border-left: 1px solid var(--rule-strong); padding-left: 2rem; }
.proof strong { display: block; font-family: var(--serif); font-size: clamp(1.4rem, 2.2vw, 1.9rem); font-weight: 500; letter-spacing: -.03em; line-height: 1.12; }
.proof p { color: var(--ink-muted); font-family: var(--serif); font-size: 1.02rem; line-height: 1.45; margin: .7rem 0 0; max-width: 34ch; }
.proof a { color: var(--accent); display: inline-block; font-size: .66rem; font-weight: 700; letter-spacing: .1em; margin-top: .9rem; text-decoration: none; text-transform: uppercase; }
.proof a:hover { color: var(--ink); }

.index-group { margin: 0 auto; padding: 3.5rem 0 0; width: var(--page); }
.index-group > .kicker { padding-bottom: .9rem; }
.index-group .index-list { width: 100%; }

/* Field Notes */
.note-list { border-top: 1px solid var(--rule-strong); margin: 0 auto 2rem; width: var(--page); }
.note-row {
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  color: inherit;
  display: grid;
  gap: .5rem 3rem;
  grid-template-columns: 12rem minmax(0, 1fr) 9rem;
  padding: 1.8rem 0;
  text-decoration: none;
}
.note-row:hover h2 { color: var(--accent); }
.note-row .kicker { font-size: .62rem; }
.note-row h2 { font-family: var(--serif); font-size: clamp(1.45rem, 2.3vw, 2rem); font-weight: 500; letter-spacing: -.03em; line-height: 1.12; margin: 0; }
.note-row p { color: var(--ink-muted); font-family: var(--serif); font-size: 1.08rem; line-height: 1.45; margin: .5rem 0 0; max-width: 62ch; }
.note-row time { color: var(--ink-faint); font-family: var(--mono); font-size: .7rem; text-align: right; }
.note-date { color: var(--ink-faint); display: block; font-family: var(--mono); font-size: .75rem; letter-spacing: .04em; margin-top: 1.4rem; }
.prose ul.qlist { border-left: 3px solid var(--rule-firm); list-style: none; margin: 1.6rem 0 2rem; padding: .2rem 0 .2rem 1.2rem; }
.prose ul.qlist li { color: var(--ink); font-family: var(--serif); font-size: 1.25rem; line-height: 1.5; padding: .15rem 0; }

/* Legal pages */
.legal { margin: 0 auto; max-width: 46rem; padding: 3rem 0 5rem; width: var(--page); }
.legal p, .legal li { color: var(--ink-muted); font-family: var(--serif); font-size: 1.08rem; line-height: 1.62; }
.legal p { margin: 0 0 1.05em; }
.legal ol, .legal ul { margin: 0 0 1.2em; padding-left: 1.5em; }
.legal li { margin: 0 0 .45em; }
.legal a { color: var(--accent); text-underline-offset: 2px; }
.legal h2 { border-top: 1px solid var(--rule-strong); font-family: var(--serif); font-size: 1.45rem; font-weight: 600; letter-spacing: -.02em; line-height: 1.2; margin: 2.6rem 0 .9rem; padding-top: 1.4rem; scroll-margin-top: 90px; }
.legal h3 { font-size: .74rem; letter-spacing: .1em; margin: 1.8rem 0 .6rem; text-transform: uppercase; }
.legal .toc { background: var(--paper-raised); border: 1px solid var(--rule-strong); border-radius: 2px; margin: 0 0 2.5rem; padding: 1.3rem 1.5rem; }
.legal .toc h2 { border: 0; color: var(--ink-faint); font-family: var(--sans); font-size: .66rem; font-weight: 700; letter-spacing: .12em; margin: 0 0 .8rem; padding: 0; text-transform: uppercase; }
.legal .toc ol { column-gap: 2rem; columns: 2; list-style: none; margin: 0; padding: 0; }
.legal .toc li { break-inside: avoid; font-family: var(--sans); font-size: .82rem; line-height: 1.4; margin: 0 0 .45rem; }
.legal .toc a { color: var(--ink); text-decoration: none; }
.legal .toc a:hover { color: var(--accent); }

/* ---------- Get started band ---------- */
.start {
  border-top: 1px solid var(--rule-strong);
  display: grid;
  gap: 2rem 4rem;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .7fr);
  margin: 0 auto;
  padding: 5.5rem 0;
  width: var(--page);
}
.start h2 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4.6vw, 4.6rem);
  font-weight: 500;
  letter-spacing: -.045em;
  line-height: .98;
  margin: .75rem 0 0;
  max-width: 14ch;
}
.start__offer { align-self: end; }
.price { align-items: baseline; display: flex; gap: .6rem; margin: 0 0 .35rem; }
.price strong { font-family: var(--serif); font-size: 3rem; font-weight: 500; letter-spacing: -.03em; line-height: 1; }
.price span { color: var(--ink-muted); font-size: .8rem; }
.start__offer p { color: var(--ink-muted); font-family: var(--serif); font-size: 1.1rem; margin: 0 0 1.4rem; max-width: 34ch; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--rule-strong); margin: 0 auto; padding: 2.5rem 0 2.5rem; width: var(--page); }
.site-footer__grid { display: grid; gap: 2rem; grid-template-columns: 1.4fr repeat(3, 1fr); }
.site-footer .brand img { height: 26px; width: 26px; }
.site-footer h4 { color: var(--ink-faint); font-size: .62rem; letter-spacing: .12em; margin: 0 0 .7rem; text-transform: uppercase; }
.site-footer nav a { color: var(--ink-muted); display: block; font-size: .8rem; padding: .18rem 0; text-decoration: none; }
.site-footer nav a:hover { color: var(--ink); }
.site-footer__base { border-top: 1px solid var(--rule); color: var(--ink-faint); display: flex; font-family: var(--mono); font-size: .65rem; justify-content: space-between; margin-top: 2rem; padding-top: 1.2rem; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .index-row { grid-template-columns: 2.5rem minmax(10rem, .6fr) 1.4fr; }
  .index-row a.more { grid-column: 3; }
}
@media (max-width: 760px) {
  :root { --page: calc(100vw - 32px); }
  .site-header__inner { gap: .5rem 1rem; grid-template-columns: auto 1fr; height: auto; padding: .7rem 0 0; }
  .site-nav { grid-column: 1 / -1; grid-row: 2; overflow-x: auto; padding: .55rem 0 .7rem; scrollbar-width: none; gap: 1.3rem; }
  .page-head { grid-template-columns: 1fr; padding: 3.5rem 0 2.5rem; }
  .section { grid-template-columns: 1fr; }
  .section__head { border-bottom: 1px solid var(--rule); border-right: 0; padding: 3rem 0 1.5rem; }
  .section__body { padding: 2rem 0 3rem; }
  .spec-row { grid-template-columns: 1fr; gap: .3rem; }
  .ladder li { grid-template-columns: 2rem 1fr; }
  .ladder li > div { grid-column: 2; }
  .index-row { gap: .4rem 1rem; grid-template-columns: 2rem 1fr; }
  .index-row p, .index-row a.more { grid-column: 2; }
  .proof { grid-template-columns: 1fr; }
  .proof > div { padding: 1.8rem 0; }
  .proof > div + div { border-left: 0; border-top: 1px solid var(--rule); padding-left: 0; }
  .note-row { gap: .35rem; grid-template-columns: 1fr; padding: 1.4rem 0; }
  .note-row time { text-align: left; }
  .legal .toc ol { columns: 1; }
  .log-entry { gap: 1rem; grid-template-columns: 1fr; padding: 2.5rem 0; }
  .log-meta { position: static; }
  .start { grid-template-columns: 1fr; padding: 4rem 0; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .site-footer__base { flex-direction: column; gap: .4rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* Field note heading */
.page-head--note { grid-template-columns: 1fr; }
.page-head--note h1 { font-size: clamp(2.6rem, 5vw, 4.8rem); line-height: .98; max-width: 20ch; }