/* ========================================================================
   QRID — qrid.club
   Editorial typographic system. No SaaS templates. No emojis.
   Charcoal #343d44 on bone #fafaf6, gold #bf9b55 used as ink.
   Display: Fraunces (variable). Text: Geist. Mono: JetBrains Mono.
   ======================================================================== */

/* ---------- Tokens ---------- */
:root {
  /* Palette — strict */
  --ink: #343d44;
  --ink-soft: #5b6570;
  --ink-faint: #8a929b;
  --bone: #fafaf6;
  --bone-warm: #f3efe4;
  --rule: #d9d4c5;
  --rule-soft: #e7e3d6;
  --gold: #bf9b55;
  --gold-deep: #8f7232;
  --paper: #ffffff;

  /* Type scale — modular ~1.25 */
  --t-eyebrow: 0.6875rem;   /* 11px */
  --t-small:   0.8125rem;   /* 13px */
  --t-body:    1.0rem;      /* 16px */
  --t-lede:    1.1875rem;   /* 19px */
  --t-h4:      1.375rem;    /* 22px */
  --t-h3:      1.875rem;    /* 30px */
  --t-h2:      2.5rem;      /* 40px */
  --t-h1:      clamp(2.75rem, 6vw + 0.5rem, 5.75rem);
  --t-display: clamp(3.25rem, 9vw, 7.5rem);

  /* Rhythm */
  --measure: 64ch;
  --gutter: clamp(1.25rem, 2.5vw, 2rem);
  --column: 76rem;
  --wide:   88rem;

  /* Type families */
  --serif:  "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --sans:   "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:   "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--sans);
  font-size: var(--t-body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--bone);
  font-feature-settings: "ss01", "ss02", "cv11";
  font-variant-numeric: oldstyle-nums;
}

img, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* Selection */
::selection { background: var(--gold); color: var(--paper); }

/* Skip link */
.skip {
  position: absolute;
  left: -9999px;
  top: auto;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: var(--t-small);
  z-index: 999;
}
.skip:focus { left: 1rem; top: 1rem; }

/* Focus */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- Layout primitives ---------- */
.wrap {
  width: 100%;
  max-width: var(--column);
  padding-inline: var(--gutter);
  margin-inline: auto;
}
.wrap--wide { max-width: var(--wide); }
.wrap--narrow { max-width: 56rem; }

/* Grid 12 */
.grid12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
  row-gap: var(--gutter);
}

/* Hairline rules */
.rule { border: 0; border-top: 1px solid var(--rule); margin-block: 0; }
.rule--soft { border-top-color: var(--rule-soft); }
.rule--gold { border-top-color: var(--gold); }
.rule--thick { border-top-width: 2px; border-top-color: var(--ink); }

/* Eyebrow */
.eyebrow {
  font-family: var(--mono);
  font-size: var(--t-eyebrow);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 500;
}
.eyebrow--gold { color: var(--gold-deep); }

/* Lede */
.lede {
  font-family: var(--serif);
  font-size: var(--t-lede);
  line-height: 1.55;
  font-weight: 400;
  font-variation-settings: "opsz" 16, "SOFT" 50;
  color: var(--ink);
  max-width: var(--measure);
}

/* Headings */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.04;
  color: var(--ink);
  font-variation-settings: "opsz" 144, "SOFT" 30;
  text-wrap: balance;
}
h2 { font-size: var(--t-h2); line-height: 1.08; }
h3 { font-size: var(--t-h3); line-height: 1.15; }
h4 { font-family: var(--sans); font-size: var(--t-h4); font-weight: 500; letter-spacing: -0.01em; line-height: 1.25; }

p { max-width: var(--measure); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bone) 85%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}
.site-header[data-scrolled="true"] { border-bottom-color: var(--rule-soft); }
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
}
.brand-wordmark { height: 28px; width: auto; flex: 0 0 auto; }
@media (max-width: 520px) {
  .brand-wordmark { height: 24px; }
}
.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  font-size: 0.9375rem;
  color: var(--ink);
  position: relative;
  transition: color 150ms ease;
}
.nav-links a:hover { color: var(--gold-deep); }
.nav-cta {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.06em;
  padding: 0.55rem 1rem;
  border: 1px solid var(--ink);
  color: var(--ink);
  transition: background 160ms ease, color 160ms ease;
}
.nav-cta:hover { background: var(--ink); color: var(--bone); }
.nav-toggle,
.nav-mobile { display: none; }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--mono);
    font-size: var(--t-small);
    color: var(--ink);
  }
  .nav-toggle svg { width: 18px; height: 18px; }
  .nav-mobile {
    display: none;
    border-top: 1px solid var(--rule-soft);
    padding: 1rem var(--gutter) 1.5rem;
    background: var(--bone);
  }
  .nav-mobile[data-open="true"] { display: block; }
  .nav-mobile ul { list-style: none; display: grid; gap: 0.85rem; }
  .nav-mobile a { font-size: 1.0625rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.35rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.005em;
  border: 1px solid transparent;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--ink);
  color: var(--bone);
  border-color: var(--ink);
}
.btn--primary:hover { background: var(--gold-deep); border-color: var(--gold-deep); }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--ghost:hover { background: var(--ink); color: var(--bone); }
.btn--quiet {
  padding: 0;
  background: transparent;
  border: 0;
  color: var(--ink);
  border-bottom: 1px solid var(--gold);
  border-radius: 0;
  padding-bottom: 2px;
}
.btn--quiet:hover { color: var(--gold-deep); }
.btn .arrow { display: inline-block; transition: transform 180ms ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Section frame ---------- */
section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.section-head .num {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.16em;
  color: var(--gold-deep);
  text-transform: uppercase;
}

/* ---------- Hero ---------- */
.hero { padding-block: clamp(4rem, 9vw, 9rem) clamp(3.5rem, 6vw, 6rem); position: relative; }
.hero-inner {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
}
.hero-meta .dot { width: 6px; height: 6px; background: var(--gold); display: inline-block; }
.hero h1 {
  font-size: var(--t-h1);
  font-weight: 350;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  letter-spacing: -0.025em;
  line-height: 0.96;
}
.hero h1 em {
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  color: var(--gold-deep);
}
.hero h1 .underline {
  background-image: linear-gradient(to top, var(--gold) 0, var(--gold) 2px, transparent 2px);
  background-position: 0 92%;
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.hero-aside {
  border-left: 1px solid var(--rule);
  padding-left: clamp(1.25rem, 2vw, 2rem);
  align-self: end;
  padding-bottom: 0.5rem;
}
.hero-aside .pull {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.375rem;
  line-height: 1.4;
  color: var(--ink);
  font-variation-settings: "opsz" 24, "SOFT" 100;
  text-wrap: balance;
}
.hero-aside cite {
  display: block;
  margin-top: 1rem;
  font-style: normal;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* Hero monogram */
.monogram {
  position: absolute;
  right: var(--gutter);
  top: 1.5rem;
  width: clamp(72px, 8vw, 110px);
  height: auto;
  opacity: 0.85;
  pointer-events: none;
}

@media (max-width: 880px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-aside { border-left: 0; border-top: 1px solid var(--rule); padding-left: 0; padding-top: 1.5rem; }
  .monogram { display: none; }
}

/* Hero footer strip — small, calm, specific */
.hero-strip {
  margin-top: clamp(3.5rem, 7vw, 6rem);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
}
.hero-strip dt {
  font-family: var(--mono);
  font-size: var(--t-eyebrow);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}
.hero-strip dd {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--ink);
  font-variation-settings: "opsz" 16;
}
@media (max-width: 580px) {
  .hero-strip { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* ---------- Thesis section ---------- */
.thesis {
  background: var(--paper);
  border-block: 1px solid var(--rule-soft);
}
.thesis-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(2rem, 5vw, 5rem);
}
.thesis-grid h2 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  line-height: 1;
  font-weight: 350;
  letter-spacing: -0.02em;
}
.thesis-body p + p { margin-top: 1.25rem; }
.thesis-body p {
  font-family: var(--serif);
  font-size: var(--t-lede);
  line-height: 1.6;
  font-variation-settings: "opsz" 18, "SOFT" 50;
}
.pillars {
  margin-top: 3.5rem;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
}
.pillars li {
  display: grid;
  grid-template-columns: 6rem 1fr 2fr;
  align-items: baseline;
  gap: 2rem;
  padding-block: 2rem;
  border-top: 1px solid var(--rule-soft);
}
.pillars li:last-child { border-bottom: 1px solid var(--rule-soft); }
.pillars .marker {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.16em;
  color: var(--gold-deep);
  text-transform: uppercase;
}
.pillars h3 {
  font-family: var(--serif);
  font-size: 1.625rem;
  font-weight: 400;
  font-variation-settings: "opsz" 36;
  line-height: 1.15;
}
.pillars p { font-size: 1rem; color: var(--ink-soft); line-height: 1.55; max-width: 56ch; }

@media (max-width: 880px) {
  .thesis-grid { grid-template-columns: 1fr; }
  .pillars li { grid-template-columns: 1fr; gap: 0.5rem; padding-block: 1.5rem; }
}

/* ---------- Network section ---------- */
.network {
  background: var(--bone);
}
.network-grid {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.network-text p { font-family: var(--serif); font-size: var(--t-lede); line-height: 1.6; }
.network-text p + p { margin-top: 1rem; }
.network-svg-wrap {
  background: var(--paper);
  border: 1px solid var(--rule-soft);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  position: relative;
}
.network-svg-wrap svg { width: 100%; height: auto; }
.network-svg-wrap figcaption {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
@media (max-width: 880px) {
  .network-grid { grid-template-columns: 1fr; }
}

/* ---------- Operators / Members / Partners ---------- */
.split {
  background: var(--paper);
  border-block: 1px solid var(--rule-soft);
}
.split + .split { border-top: 0; }
.split-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
.split--reverse .split-grid {
  grid-template-columns: 7fr 5fr;
}
.split-head h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  margin-top: 0.5rem;
  line-height: 1.05;
}
.split-head .eyebrow { display: block; margin-bottom: 1.25rem; }
.split-body { padding-top: 0.5rem; }
.split-body p { font-family: var(--serif); font-size: var(--t-lede); line-height: 1.6; }

/* Numbered list — gold serif numerals */
.numlist {
  list-style: none;
  margin-top: 0.5rem;
  counter-reset: item;
}
.numlist > li {
  counter-increment: item;
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.5rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--rule-soft);
}
.numlist > li:last-child { border-bottom: 1px solid var(--rule-soft); }
.numlist > li::before {
  content: counter(item, decimal-leading-zero);
  font-family: var(--serif);
  font-style: italic;
  font-size: 2rem;
  font-weight: 400;
  font-variation-settings: "opsz" 36, "SOFT" 100;
  color: var(--gold);
  line-height: 1;
}
.numlist h4 { margin-bottom: 0.35rem; }
.numlist p { font-size: 1rem; color: var(--ink-soft); max-width: 56ch; }

/* Touchpoints inline list (members) */
.touchpoints {
  list-style: none;
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.04em;
}
.touchpoints li {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--rule);
  color: var(--ink);
}

@media (max-width: 880px) {
  .split-grid, .split--reverse .split-grid { grid-template-columns: 1fr; }
}

/* ---------- Foundation (built on KaritKarma) ---------- */
.foundation {
  background: var(--bone-warm);
}
.foundation-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}
.foundation-grid h2 { font-size: clamp(2rem, 3.5vw, 2.75rem); }
.tech-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
}
.tech-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: baseline;
}
.tech-list li:nth-child(odd) { padding-right: 1.25rem; border-right: 1px solid var(--rule); }
.tech-list li:nth-child(even) { padding-left: 1.25rem; }
.tech-list dt {
  font-family: var(--serif);
  font-size: 1.1875rem;
  font-weight: 400;
  font-style: italic;
  font-variation-settings: "opsz" 24, "SOFT" 100;
  color: var(--ink);
}
.tech-list dd {
  font-family: var(--mono);
  font-size: var(--t-small);
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
@media (max-width: 720px) {
  .foundation-grid { grid-template-columns: 1fr; }
  .tech-list { grid-template-columns: 1fr; }
  .tech-list li:nth-child(odd) { padding-right: 0; border-right: 0; }
  .tech-list li:nth-child(even) { padding-left: 0; }
}

/* ---------- Numbers — restrained big serif numerals ---------- */
.numbers {
  background: var(--ink);
  color: var(--bone);
}
.numbers h2, .numbers .eyebrow { color: var(--bone); }
.numbers .eyebrow { color: color-mix(in srgb, var(--gold) 90%, var(--bone) 10%); }
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 3rem;
}
.numbers-grid > div {
  padding: 2rem 1.5rem 2rem 0;
  border-right: 1px solid color-mix(in srgb, var(--bone) 14%, transparent);
}
.numbers-grid > div:last-child { border-right: 0; padding-right: 0; }
.numbers-grid > div + div { padding-left: 1.5rem; }
.numbers-grid .figure {
  font-family: var(--serif);
  font-size: clamp(3rem, 7vw, 5.25rem);
  font-weight: 350;
  letter-spacing: -0.03em;
  line-height: 1;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  color: var(--bone);
}
.numbers-grid .figure sup {
  font-family: var(--mono);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  margin-left: 0.35rem;
  color: var(--gold);
  vertical-align: super;
  font-variation-settings: normal;
}
.numbers-grid .label {
  margin-top: 1.25rem;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--bone) 75%, transparent);
  line-height: 1.45;
}
@media (max-width: 880px) {
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .numbers-grid > div { padding: 1.5rem 1rem 1.5rem 0; border-bottom: 1px solid color-mix(in srgb, var(--bone) 14%, transparent); }
  .numbers-grid > div:nth-child(2n) { padding-right: 0; border-right: 0; padding-left: 1rem; }
  .numbers-grid > div + div { padding-left: 1rem; }
  .numbers-grid > div:nth-last-child(-n+2) { border-bottom: 0; }
}
@media (max-width: 460px) {
  .numbers-grid { grid-template-columns: 1fr; }
  .numbers-grid > div { padding: 1.25rem 0; border-right: 0; border-bottom: 1px solid color-mix(in srgb, var(--bone) 14%, transparent); }
  .numbers-grid > div + div { padding-left: 0; }
}

/* ---------- Roadmap teaser ---------- */
.roadmap-list {
  list-style: none;
  border-top: 1px solid var(--rule);
}
.roadmap-list li {
  display: grid;
  grid-template-columns: 8rem 1fr auto;
  gap: 1.5rem;
  align-items: baseline;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.roadmap-list .when {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-deep);
}
.roadmap-list h4 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.375rem;
  font-weight: 400;
  font-variation-settings: "opsz" 24, "SOFT" 100;
}
.roadmap-list .status {
  font-family: var(--mono);
  font-size: var(--t-small);
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}
@media (max-width: 720px) {
  .roadmap-list li { grid-template-columns: 1fr; gap: 0.4rem; padding-block: 1.25rem; }
  .roadmap-list .when { order: -1; }
}

/* ---------- Pricing — typographic comparison, NOT 3-card SaaS ---------- */
.pricing { background: var(--paper); border-block: 1px solid var(--rule-soft); }
.tiers {
  margin-top: 1rem;
  border-top: 1px solid var(--rule);
}
.tier {
  display: grid;
  grid-template-columns: 1fr 1.5fr 2fr auto;
  gap: clamp(1rem, 3vw, 3rem);
  padding-block: 2rem;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.tier-name {
  font-family: var(--serif);
  font-size: 2.25rem;
  font-weight: 400;
  font-variation-settings: "opsz" 36;
  line-height: 1;
  letter-spacing: -0.015em;
}
.tier-name em { font-style: italic; color: var(--gold-deep); font-variation-settings: "opsz" 36, "SOFT" 100; }
.tier-tag {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-transform: uppercase;
}
.tier-desc { font-size: 1rem; line-height: 1.55; color: var(--ink); max-width: 50ch; }
.tier-action a {
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}
.tier-action a:hover { color: var(--gold-deep); }
@media (max-width: 880px) {
  .tier { grid-template-columns: 1fr; gap: 0.75rem; padding-block: 1.5rem; }
}

/* ---------- FAQ ---------- */
.faq { background: var(--bone); }
.faq-list {
  border-top: 1px solid var(--rule);
}
.faq-list details {
  border-bottom: 1px solid var(--rule);
  padding-block: 1.25rem;
}
.faq-list summary {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 2rem;
  gap: 1rem;
  align-items: baseline;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  font-variation-settings: "opsz" 36;
  line-height: 1.3;
  color: var(--ink);
  padding-right: 0.5rem;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--gold);
  transition: transform 200ms ease;
  text-align: right;
  font-variation-settings: "opsz" 36, "SOFT" 100;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list .answer {
  margin-top: 0.85rem;
  padding-right: 3rem;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 64ch;
}

/* ---------- Lead form ---------- */
.lead { background: var(--paper); border-top: 1px solid var(--rule-soft); }
.lead-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(2rem, 5vw, 5rem);
}
.lead-intro h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
}
.lead-intro p { font-family: var(--serif); font-size: var(--t-lede); line-height: 1.6; margin-top: 1rem; }
.lead-meta {
  margin-top: 2.5rem;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
  display: grid;
  gap: 0.5rem;
}
.lead-meta a { color: var(--ink); border-bottom: 1px solid var(--gold); padding-bottom: 1px; }
.lead-form { display: grid; gap: 1.4rem; }
.field { display: grid; gap: 0.45rem; }
.field label {
  font-family: var(--mono);
  font-size: var(--t-eyebrow);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.field input, .field textarea, .field select {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink);
  padding: 0.55rem 0;
  color: var(--ink);
  border-radius: 0;
  transition: border-color 160ms ease;
}
.field textarea { resize: vertical; min-height: 5.5rem; line-height: 1.55; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-bottom-color: var(--gold);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.lead-submit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}
.lead-status[data-state="success"] { color: var(--gold-deep); }
.lead-status[data-state="error"] { color: #a34a2c; }
.lead-status {
  font-family: var(--mono);
  font-size: var(--t-small);
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
@media (max-width: 880px) {
  .lead-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: color-mix(in srgb, var(--bone) 80%, transparent);
  padding-block: clamp(3rem, 6vw, 5rem);
}
.foot-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}
.foot-brand {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 400;
  font-variation-settings: "opsz" 36;
  letter-spacing: -0.015em;
  color: var(--bone);
}
.foot-brand small {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--bone) 60%, transparent);
  font-variation-settings: normal;
  font-weight: normal;
}
.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
}
.foot-col h5 {
  font-family: var(--mono);
  font-size: var(--t-eyebrow);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
  font-weight: 500;
}
.foot-col ul { list-style: none; display: grid; gap: 0.55rem; }
.foot-col a {
  font-size: var(--t-small);
  color: color-mix(in srgb, var(--bone) 80%, transparent);
  transition: color 150ms ease;
}
.foot-col a:hover { color: var(--gold); }
.foot-col p { font-size: var(--t-small); color: color-mix(in srgb, var(--bone) 70%, transparent); line-height: 1.55; }

.foot-bar {
  margin-top: clamp(2rem, 5vw, 4rem);
  padding-top: 1.25rem;
  border-top: 1px solid color-mix(in srgb, var(--bone) 12%, transparent);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--bone) 55%, transparent);
}
.foot-bar a { color: inherit; }
.foot-bar a:hover { color: var(--gold); }
@media (max-width: 880px) {
  .foot-grid { grid-template-columns: 1fr; }
  .foot-cols { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .foot-cols { grid-template-columns: 1fr; }
}

/* ---------- Reveal on scroll (subtle) ---------- */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Doc page (architecture) ---------- */
.doc {
  max-width: 64rem;
  margin: 0 auto;
  padding-block: clamp(3rem, 7vw, 6rem);
  padding-inline: var(--gutter);
}
.doc header.doc-head { margin-bottom: 3rem; }
.doc header.doc-head .eyebrow { display: block; margin-bottom: 1rem; }
.doc h1 { font-size: clamp(2.5rem, 5vw, 4.25rem); line-height: 1; font-weight: 350; }
.doc .doc-lede {
  margin-top: 1.5rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1.55;
  font-variation-settings: "opsz" 24, "SOFT" 50;
  max-width: 56ch;
}
.doc article > section { padding-block: clamp(2.5rem, 5vw, 4rem); }
.doc article > section + section { border-top: 1px solid var(--rule-soft); }
.doc h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 1.25rem;
  letter-spacing: -0.015em;
}
.doc h3 {
  font-size: 1.375rem;
  margin-block: 1.5rem 0.5rem;
  font-style: italic;
  font-variation-settings: "opsz" 36, "SOFT" 100;
  color: var(--gold-deep);
}
.doc p { font-size: 1.0625rem; line-height: 1.65; margin-bottom: 1rem; max-width: 64ch; }
.doc p strong { font-weight: 500; color: var(--ink); }
.doc ul, .doc ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.doc ul li, .doc ol li { margin-bottom: 0.5rem; max-width: 60ch; line-height: 1.6; }
.doc ul li::marker { color: var(--gold); }

.doc-diagram {
  background: var(--paper);
  border: 1px solid var(--rule-soft);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  margin-block: 2rem;
}
.doc-diagram svg { width: 100%; height: auto; }
.doc-diagram figcaption {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.doc-toc {
  margin-block: 2rem 3rem;
  padding: 1.25rem 1.5rem;
  border-left: 2px solid var(--gold);
  background: var(--bone-warm);
}
.doc-toc .eyebrow { display: block; margin-bottom: 0.85rem; }
.doc-toc ol { list-style: decimal; padding-left: 1.5rem; margin: 0; }
.doc-toc li { margin-bottom: 0.4rem; font-size: 0.9375rem; }
.doc-toc a { color: var(--ink); border-bottom: 1px solid transparent; }
.doc-toc a:hover { border-bottom-color: var(--gold); }
.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.doc-back:hover { color: var(--gold-deep); }
.doc-foot {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 2px solid var(--ink);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--mono);
  font-size: var(--t-small);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}