/* ==========================================================================
   ethanjfarrar.com — styles
   Vanilla CSS. Custom properties for theming. Mobile-first.
   Headings: Source Serif 4. Body/UI: Inter. One accent: deep blue-gray.

   Design language: a single accent device recurs as the site's signature —
   a thin rule at the top of the page, a short marker that anchors the hero
   and each section heading, the phase numbers, and the closing divider.
   Restraint is the statement; the accent is used sparingly and on purpose.
   ========================================================================== */

/* --- Fonts (self-hosted, latin subset, variable) ------------------------- */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("fonts/inter-latin.woff2") format("woff2");
}

@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-serif-4-latin.woff2") format("woff2");
}

/* --- Design tokens ------------------------------------------------------- */

:root {
  /* Type families */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", "Roboto Mono", Menlo, Consolas, monospace;

  /* Type scale */
  --fs-body: 1.125rem;                        /* 18px */
  --fs-lead: 1.1875rem;                       /* 19px */
  --fs-small: 0.9375rem;                      /* 15px */
  --fs-label: 0.8125rem;                      /* 13px */
  --fs-h3: 1.25rem;                           /* 20px */
  --fs-h2: 1.75rem;                           /* 28px */
  --fs-h1: clamp(2.25rem, 4.5vw + 1rem, 3.5rem);   /* 36 -> 56px */
  --fs-price: clamp(1.875rem, 2.5vw + 0.75rem, 2.25rem);

  /* Line heights */
  --lh-body: 1.65;
  --lh-heading: 1.2;
  --lh-hero: 1.05;

  /* Color */
  --bg: #faf9f7;
  --text: #1f1f1f;
  --text-secondary: #595754;
  --border: #e4e1db;
  --hairline: #ebe8e2;
  --accent: #213a54;
  --accent-hover: #152737;
  --accent-muted: color-mix(in srgb, var(--accent) 48%, var(--bg));
  --card-bg: #f4f2ed;
  --divider: #d9d5cc;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;

  /* Layout */
  --page-width: 50rem;     /* 800px page frame */
  --measure: 42rem;        /* ~672px prose measure */
  --section-pad: clamp(3.5rem, 6.5vw, 5.5rem);

  /* The recurring accent marker */
  --marker-width: 2.5rem;

  /* Card / control radius */
  --radius: 4px;
  --radius-card: 0.5rem;   /* 8px — crisper editorial card corners */

  /* Motion — one professional ease (expo-out) for every micro-interaction */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Reset / base -------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  border-top: 3px solid var(--accent);   /* page signature rule */
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: var(--lh-heading);
  letter-spacing: -0.012em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.06em;
  transition: color 0.18s var(--ease), text-decoration-color 0.18s var(--ease);
}

a:hover {
  color: var(--accent-hover);
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* --- Button (primary CTA) ------------------------------------------------ */

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
  padding: 0.85rem 1.6rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.1s var(--ease);
}

.button:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--bg);
}

.button:active {
  transform: scale(0.98);
}

/* --- Utilities ----------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--page-width);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 3rem);
}

/* Constrain prose to a comfortable measure, flush-left within the frame */
.measure > * {
  max-width: var(--measure);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--text);
  color: var(--bg);
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  z-index: 10;
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

/* --- Header -------------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.site-header__name {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1875rem;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.site-header__name::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  background: var(--accent);
  border-radius: 2px;
}

.site-header__name:hover {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: var(--space-5);
}

.site-nav a {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.25em;
  text-decoration-color: currentColor;
}

/* --- Sections + the recurring marker ------------------------------------- */

.section > .container {
  position: relative;
  border-top: 1px solid var(--divider);
  padding-block: var(--section-pad);
}

/* A small accent diamond centered on each section divider, breaking the rule. */
.section > .container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1.25rem;
  height: 0.7rem;
  transform: translate(-50%, -50%);
  background: var(--bg);
}

.section > .container::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 0.5rem;
  height: 0.5rem;
  transform: translate(-50%, -50%) rotate(45deg);
  background: var(--accent);
}

.section__heading {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-5);
}

/* Short accent rule that anchors the hero and each section heading */
.section__heading::before {
  content: "";
  display: block;
  width: var(--marker-width);
  height: 2px;
  margin-bottom: var(--space-4);
  background: var(--accent);
}

/* --- Hero ---------------------------------------------------------------- */

.hero > .container {
  padding-block: clamp(5rem, 12vw, 8.5rem) clamp(3.5rem, 7vw, 5rem);
}

/* Centered hero block — equal whitespace both sides */
.hero__body {
  max-width: var(--measure);
  margin-inline: auto;
  text-align: center;
}

.hero__headline {
  font-size: var(--fs-h1);
  line-height: var(--lh-hero);
  letter-spacing: -0.028em;
  max-width: 18ch;
  margin-inline: auto;
}

.hero__subhead {
  margin-top: var(--space-5);
  max-width: 33rem;
  margin-inline: auto;
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.hero__actions {
  margin-top: var(--space-6);
}

/* --- Background (lead-in) ------------------------------------------------ */

.section--background p {
  font-size: var(--fs-lead);
}

.section--background p + p {
  margin-top: var(--space-4);
}

/* --- Pillars ------------------------------------------------------------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  counter-reset: pillar;
}

.pillar {
  border-top: 1px solid var(--border);
  padding-top: var(--space-4);
}

.pillar::before {
  counter-increment: pillar;
  content: counter(pillar, decimal-leading-zero);
  display: block;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  font-variant-numeric: lining-nums tabular-nums;
  color: var(--accent-muted);
  margin-bottom: var(--space-3);
}

.pillar__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-3);
}

/* The core-claim phrase in each pillar body, emphasized in medium weight */
.pillar__key {
  font-weight: 500;
}

/* --- Workflows ----------------------------------------------------------- */

.workflows {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.workflow {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: clamp(1.5rem, 3vw, 2rem);
  transition: box-shadow 0.2s var(--ease);
}

.workflow:hover {
  box-shadow: 0 2px 10px rgba(31, 31, 31, 0.05);
}

.workflow__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-2);
}

.workflow__timeline {
  margin-top: auto;
  padding-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-variant-numeric: lining-nums tabular-nums;
  color: var(--text-secondary);
}

/* --- Pricing ------------------------------------------------------------- */

.pricing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.offering {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--card-bg);
  padding: clamp(1.75rem, 3.5vw, 2.5rem);
  transition: box-shadow 0.2s var(--ease);
}

.offering:hover {
  box-shadow: 0 2px 10px rgba(31, 31, 31, 0.05);
}

.offering__price {
  font-family: var(--font-serif);
  font-size: var(--fs-price);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--accent);
  font-variant-numeric: lining-nums tabular-nums;
  white-space: nowrap;
}

.offering__name {
  font-size: var(--fs-h3);
  margin-top: var(--space-3);
}

.offering__desc {
  margin-top: var(--space-3);
  color: var(--text-secondary);
}

/* --- How it works -------------------------------------------------------- */

.phases {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: phase;
}

.phase {
  position: relative;
  padding: var(--space-4) 0 var(--space-4) 2.75rem;
  border-top: 1px solid var(--hairline);
}

.phase:first-child {
  border-top: 0;
  padding-top: 0;
}

.phase::before {
  counter-increment: phase;
  content: counter(phase);
  position: absolute;
  left: 0;
  top: var(--space-4);
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: lining-nums tabular-nums;
}

.phase:first-child::before {
  top: 0;
}

.phase__name {
  font-weight: 600;
}

/* --- FAQ ----------------------------------------------------------------- */

.faq {
  display: flex;
  flex-direction: column;
}

.faq__item {
  padding-block: var(--space-5);
  border-top: 1px solid var(--hairline);
}

.faq__item:first-child {
  padding-top: 0;
  border-top: 0;
}

.faq__question {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-3);
}

.faq__answer {
  color: var(--text-secondary);
}

.methodology-link {
  margin-top: var(--space-6);
  font-size: var(--fs-small);
}

/* --- CTA (the close) ----------------------------------------------------- */

.section--cta > .container {
  border-top-width: 2px;
  border-top-color: var(--accent);
}

/* the close is anchored by the accent rule above, so it skips the marker */
.section--cta .section__heading::before {
  display: none;
}

.section--cta p {
  margin-top: var(--space-3);
  max-width: 34rem;
}

.cta__email {
  margin-top: var(--space-5);
}

.cta__email a {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  text-underline-offset: 0.2em;
}

/* --- Footer -------------------------------------------------------------- */

.site-footer {
  margin-top: var(--space-8);
  border-top: 1px solid var(--divider);
  font-size: var(--fs-small);
  color: var(--text-secondary);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-6) var(--space-5);
}

.site-footer__brand {
  max-width: 24rem;
}

.site-footer__name {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--text);
}

.site-footer__name::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  background: var(--accent);
  border-radius: 2px;
}

.site-footer__tagline {
  margin: var(--space-2) 0 0;
  color: var(--text-secondary);
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.site-footer__base {
  display: flex;
  justify-content: space-between;
  padding-block: var(--space-4);
  border-top: 1px solid var(--border);
}

.site-footer__copy {
  margin: 0;
}

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

/* Stack the three pillars before they get cramped on tablets. */
@media (max-width: 820px) {
  .pillars {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .pillar {
    padding-block: var(--space-5);
  }

  .pillar:first-child {
    padding-top: 0;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 1rem;
  }

  .hero__subhead {
    font-size: 1.125rem;
  }

  .workflows,
  .pricing {
    grid-template-columns: 1fr;
  }
}

/* --- Motion preferences -------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .button:active {
    transform: none;
  }
}

/* --- Methodology document ------------------------------------------------ */

.doc > .container {
  padding-block: clamp(3rem, 7vw, 4.5rem) var(--space-7);
}

.doc__title {
  font-size: clamp(1.875rem, 4vw + 0.5rem, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.doc__title::before,
.doc h2::before {
  content: "";
  display: block;
  width: var(--marker-width);
  height: 2px;
  margin-bottom: var(--space-4);
  background: var(--accent);
}

.doc h2 {
  font-size: var(--fs-h2);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.doc p {
  margin-top: var(--space-4);
}

.doc__title + p {
  margin-top: var(--space-5);
  font-size: 1.3125rem;
  line-height: 1.5;
}

/* Run-in principle leads — the named principles and case-study components
   read as sub-headings, structuring the document for a scanning reviewer. */
.doc p > strong:first-child {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1875rem;
  letter-spacing: -0.005em;
  margin-bottom: var(--space-2);
}

/* Lining, tabular figures so numbers read like a financial exhibit. */
.doc p,
.doc__list li {
  font-variant-numeric: lining-nums tabular-nums;
}

/* Downloadable-PDF affordance — mono meta label, ties the motif across pages. */
.doc__download {
  margin-top: var(--space-5);
}

.doc__download a {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.doc__download a::before {
  content: "\2193\00a0";
}

.doc__list {
  margin-top: var(--space-4);
  padding-left: 1.25rem;
}

.doc__list li {
  margin-top: var(--space-3);
  padding-left: 0.25rem;
}

.doc__list li::marker {
  color: var(--accent);
}

.doc__rule {
  margin-top: var(--space-8);
  border: 0;
  border-top: 1px solid var(--border);
}

.doc__note {
  margin-top: var(--space-4);
  color: var(--text-secondary);
  font-size: var(--fs-small);
  font-style: italic;
}

/* Workflow figure — left-aligned to the section heading, extending right
   of the prose measure on wide screens so the diagram labels stay
   legible. The diagram itself (.flow) is an HTML/CSS component that
   reflows instead of scaling. */
.doc__figure {
  max-width: none;
  width: clamp(100%, calc(100% + (100vw - var(--page-width)) / 2 - 1.5rem), 60rem);
  margin: var(--space-4) 0 0;
}

/* Homepage variant: the figure breaks out of the page frame
   symmetrically (centered) instead of extending right from the heading. */
.doc__figure--center {
  --figure-width: min(60rem, 92vw);
  width: var(--figure-width);
  margin-inline: calc((100% - var(--figure-width)) / 2);
}

/* Workflow diagram. All internal sizes are in em so one font-size scales
   the whole component: fluid on mid-width screens, compact in print.
   Horizontal grid by default (and in print); stacks below 60em. */
.flow {
  font-size: clamp(0.75rem, 0.85vw + 0.3rem, 1rem);
  font-family: var(--font-sans);
  font-variant-numeric: lining-nums tabular-nums;
  line-height: 1.3;
  color: #25303b;
  display: grid;
  grid-template-columns: max-content 2.1em minmax(0, 1fr) minmax(0, 2fr) minmax(0, 1fr) 3.1em minmax(0, 1.7fr) 2.1em minmax(0, 1fr);
  row-gap: 0.55em;
  print-color-adjust: exact;
  -webkit-print-color-adjust: exact;
}

/* Lane labels — zone headers inside their panels */
.flow__lane {
  justify-self: start;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 0.72em;
  letter-spacing: 0.15em;
  color: #6f665a;
  white-space: nowrap;
}

.flow__lane--assembly { grid-row: 1; grid-column: 1 / -1; }
.flow__lane--judgment { color: #5b6b7d; }

/* Main row: systems → assembly box → divide → review → deliverable */
.flow__systems {
  grid-row: 1;
  grid-column: 1;
  align-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.45em;
}

.flow__title {
  font-family: var(--font-serif);
  font-size: 0.94em;
}

.flow__meta {
  font-family: var(--font-mono);
  font-size: 0.59em;
  letter-spacing: 0.02em;
  color: #9b9080;
  white-space: nowrap;
}

/* The assembly box subgrids onto the capture/build/draft tracks, so the
   model bar (and the "builds" connector) can align to the Build track.
   Its lane label sits inside, as the zone header. */
.flow__box {
  grid-row: 1;
  grid-column: 3 / 6;
  display: grid;
  grid-template-columns: subgrid;
  grid-template-rows: auto 1fr;
  row-gap: 0.4em;
  align-items: center;
  padding: 0.8em 0.5em;
  background: #fbf8f1;
  border: 1px solid #d8d0c2;
  border-radius: var(--radius);
}

.flow__box .flow__step { grid-row: 2; }

.flow__step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.35em;
  min-width: 0;
}

/* Step chevrons, drawn on the shared track boundary */
.flow__step + .flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0.45em;
  height: 0.45em;
  border-top: 0.11em solid #213a54;
  border-right: 0.11em solid #213a54;
  transform: translate(-50%, -50%) rotate(45deg);
}

.flow__num {
  font-family: var(--font-mono);
  font-size: 0.625em;
  letter-spacing: 0.05em;
  color: #aaa094;
  white-space: nowrap;
}

.flow__steptitle {
  font-family: var(--font-serif);
  font-size: 1em;
}

.flow__desc {
  font-size: 0.69em;
  color: #837a6e;
  max-width: 8.5em;
}

.flow__subrow {
  display: flex;
  align-items: center;
  gap: 0.35em;
}

.flow__sub {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2em;
  padding: 0.45em 0.55em;
  background: #fffdf9;
  border: 1px solid #d8d0c2;
  border-radius: 3px;
}

.flow__sub--ai {
  background: #f4ede3;
  border-color: #c3b9a8;
}

.flow__subtitle {
  font-family: var(--font-serif);
  font-size: 0.69em;
  white-space: nowrap;
}

.flow__subdesc {
  font-size: 0.53em;
  color: #837a6e;
}

.flow__motto {
  font-family: var(--font-mono);
  font-size: 0.53em;
  letter-spacing: 0.035em;
  color: #5b6b7d;
  white-space: nowrap;
}

/* Parallel descriptor on the human side — the zone panel's footer line */
.flow__motto--judgment {
  align-self: flex-start;
  white-space: normal;
  text-align: left;
}

.flow__node {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 0.4em;
  padding: 0.9em 1em;
  border-radius: var(--radius);
}

/* Human territory — a bounded judgment zone: light cool panel with the
   navy border and the navy Review block as its focal mass. The finished
   deliverable sits OUTSIDE the zone as its output. */
.flow__human {
  grid-row: 1;
  grid-column: 7;
  display: flex;
  flex-direction: column;
  gap: 0.6em;
  padding: 0.8em;
  background: #eef1f6;
  border: 1px solid #213a54;
  border-radius: var(--radius);
}

.flow__review {
  flex: 1;
  background: #213a54;
}

.flow__review .flow__title { font-size: 1.06em; color: #f6f2eb; }

.flow__deliverable {
  grid-row: 1;
  grid-column: 9;
  align-self: center;
  background: #fffdf9;
  border: 1px solid #d8d0c2;
}

.flow__deliverable .flow__desc { max-width: none; }

/* Connectors — drawn in CSS so they can rotate when the flow stacks */
.flow__arrow {
  position: relative;
  align-self: center;
}

.flow__arrow--in { grid-row: 1; grid-column: 2; }
.flow__arrow--out { grid-row: 1; grid-column: 8; }

.flow__arrow--in,
.flow__arrow--out {
  width: 2.1em;
  height: 0.9em;
}

.flow__arrow--in::before,
.flow__arrow--out::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0.45em;
  height: 0.1em;
  transform: translateY(-50%);
  background: #213a54;
}

.flow__arrow--in::after,
.flow__arrow--out::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  border: 0.3em solid transparent;
  border-right: 0;
  border-left: 0.48em solid #213a54;
}

.flow__arrow--sub {
  flex: none;
  width: 1.05em;
  height: 0.8em;
}

.flow__arrow--sub::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0.4em;
  height: 0.09em;
  transform: translateY(-50%);
  background: #213a54;
}

.flow__arrow--sub::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  border: 0.26em solid transparent;
  border-right: 0;
  border-left: 0.42em solid #213a54;
}

/* The divide between automated assembly and human judgment */
.flow__divide {
  grid-row: 1;
  grid-column: 6;
  position: relative;
  align-self: center;
  width: 3.1em;
  height: 1em;
}

.flow__divide::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0.45em;
  height: 0.1em;
  transform: translateY(-50%);
  background: #213a54;
}

.flow__divide::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  border: 0.3em solid transparent;
  border-right: 0;
  border-left: 0.48em solid #213a54;
}

.flow__diamond {
  position: absolute;
  top: 50%;
  left: 42%;
  width: 0.58em;
  height: 0.58em;
  margin: -0.29em 0 0 -0.29em;
  background: #213a54;
  transform: rotate(45deg);
}

/* Down-links into the model bar */
.flow__link {
  grid-row: 2;
  display: flex;
  align-items: center;
  gap: 0.45em;
}

/* "builds" originates at the Build step: centered beneath it (Build is
   the middle step of the box) with the connector contacting the box
   edge directly below it, so Draft doesn't read as a model-builder. */
.flow__link--builds { grid-column: 4; justify-self: center; margin-top: -0.55em; }
.flow__link--builds .flow__larrow { height: 2.65em; }
.flow__link--traces { grid-column: 9; justify-self: center; }

.flow__llabel {
  font-family: var(--font-mono);
  font-size: 0.53em;
  color: #5b6b7d;
}

.flow__link--traces .flow__llabel {
  max-width: 9em;
  text-align: right;
}

.flow__larrow {
  position: relative;
  flex: none;
  width: 0.9em;
  height: 2.1em;
}

.flow__larrow::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0.42em;
  width: 0.09em;
  transform: translateX(-50%);
  background: #213a54;
}

.flow__larrow::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  border: 0.28em solid transparent;
  border-bottom: 0;
  border-top: 0.45em solid #213a54;
}

/* The model bar — single source of truth */
/* The bar starts at the Build track — Capture precedes the model */
.flow__model {
  grid-row: 3;
  grid-column: 4 / 10;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.3em 0.55em;
  padding: 0.6em 1.7em;
  background: #e9edf2;
  border: 1px solid #cdd6e0;
  border-radius: 5px;
}

/* "THE MODEL" — the same short mono/caps label on the desktop bar and
   the stacked rail; the source-of-truth line lives in the caption. */
.flow__modeltitle {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.72em;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #213a54;
}

/* Figure caption — horizontal, beneath the figure in both layouts */
.flow__caption {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.53rem;
  letter-spacing: 0.035em;
  color: #5b6b7d;
  text-align: center;
}

/* Stacked flow on narrow screens (screen-only: print keeps the
   horizontal layout). DOM order is the stack order. */
@media screen and (max-width: 60em) {
  .doc__figure {
    width: 100%;
  }

  .doc__figure--center {
    margin-inline: 0;
  }

  /* Stacked: the process flows down the first column while the model
     runs as a skinny vertical bar down the right side, spanning the
     assembly through the deliverable — the desktop arrangement rotated
     90°. The middle column holds the two connectors, which auto-place
     beside their sources (builds beside the assembly box, traces-back
     beside the deliverable) and point right into the bar. */
  .flow {
    font-size: 1rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) max-content 2.2em;
    column-gap: 0;
    row-gap: 0.7em;
    align-items: center;
  }

  .flow > * {
    grid-area: auto / 1 / auto / auto;
    justify-self: center;
  }

  /* The box spans four rows (label / capture / build / draft) via
     subgrid, so the rail can start at the Build row — Capture and the
     zone header sit above it. */
  .flow__box {
    grid-row: span 4;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: subgrid;
    justify-self: stretch;
    padding: 1.1em 1em;
  }

  .flow__box .flow__step {
    grid-row: auto;
    padding-block: 0.3em;
  }

  /* The human zone stacks as a single panel; the deliverable follows
     below it as its output. */
  .flow__human {
    justify-self: stretch;
    padding: 1em;
  }

  .flow__step + .flow__step::before {
    left: 50%;
    top: -0.35em;
    transform: translate(-50%, -50%) rotate(135deg);
  }

  .flow__node {
    justify-self: stretch;
    padding: 1em;
  }

  .flow__subrow {
    flex-direction: column;
    gap: 0.4em;
  }

  .flow__motto {
    white-space: normal;
    text-align: center;
  }

  .flow__arrow--sub {
    width: 0.8em;
    height: 1.05em;
  }

  .flow__arrow--sub::before {
    left: 50%;
    top: 0;
    bottom: 0.4em;
    right: auto;
    width: 0.09em;
    height: auto;
    transform: translateX(-50%);
  }

  .flow__arrow--sub::after {
    left: 50%;
    top: auto;
    right: auto;
    bottom: 0;
    transform: translateX(-50%);
    border: 0.26em solid transparent;
    border-bottom: 0;
    border-top: 0.42em solid #213a54;
  }

  /* Connectors: full-gutter tie-lines — the line runs from the box/card
     edge into the rail, with its label above. Both connectors share the
     same anatomy. */
  .flow__link {
    grid-column: 2;
    flex-direction: column;
    gap: 0.3em;
    margin-top: 0;
    justify-self: stretch;
  }

  .flow__link--builds {
    flex-direction: column-reverse;
  }

  .flow__link--builds {
    grid-row: 5;
  }

  .flow__link--traces {
    grid-row: 10;
  }

  .flow__link--builds .flow__larrow {
    height: 0.9em;
  }

  .flow__llabel,
  .flow__link--traces .flow__llabel {
    text-align: center;
  }

  .flow__link--traces .flow__llabel {
    max-width: 8em;
  }

  .flow__larrow {
    width: 100%;
    height: 0.9em;
  }

  .flow__larrow::before {
    left: 0;
    right: 0.45em;
    top: 50%;
    bottom: auto;
    width: auto;
    height: 0.09em;
    transform: translateY(-50%);
  }

  .flow__larrow::after {
    left: auto;
    right: 0;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    border: 0.28em solid transparent;
    border-right: 0;
    border-left: 0.45em solid #213a54;
  }

  /* The model: a skinny vertical rail spanning the rows from the
     assembly box through the finished deliverable. Sideways short label
     reading bottom-to-top (vertical-rl flipped 180° — Safari has no
     sideways-lr); the full source-of-truth line moves to the caption. */
  .flow__model {
    grid-column: 3;
    grid-row: 5 / 11;
    justify-self: stretch;
    align-self: stretch;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 0.55em;
    padding: 1.2em 0.5em;
  }

  .flow__arrow--in,
  .flow__arrow--out {
    width: 0.9em;
    height: 1.9em;
  }

  .flow__arrow--in::before,
  .flow__arrow--out::before {
    top: 0;
    bottom: 0.42em;
    left: 50%;
    right: auto;
    width: 0.1em;
    height: auto;
    transform: translateX(-50%);
  }

  .flow__arrow--in::after,
  .flow__arrow--out::after {
    top: auto;
    bottom: 0;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    border: 0.3em solid transparent;
    border-bottom: 0;
    border-top: 0.48em solid #213a54;
  }

  .flow__divide {
    width: 1em;
    height: 2.6em;
    margin-block: 0.25em;
  }

  .flow__divide::before {
    top: 0;
    bottom: 0.45em;
    left: 50%;
    right: auto;
    width: 0.1em;
    height: auto;
    transform: translateX(-50%);
  }

  .flow__divide::after {
    top: auto;
    bottom: 0;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    border: 0.3em solid transparent;
    border-bottom: 0;
    border-top: 0.48em solid #213a54;
  }

  .flow__diamond {
    left: 50%;
    top: 42%;
  }
}

/* --- Print (clean "Save as PDF" for the methodology page) ---------------- */

@media print {
  body {
    border-top: 0;
    background: #fff;
    color: #000;
    font-size: 11pt;
    line-height: 1.5;
  }

  .site-header,
  .site-footer,
  .skip-link {
    display: none !important;
  }

  .container {
    max-width: none;
    padding-inline: 0;
  }

  .measure > * {
    max-width: none;
  }

  .doc > .container {
    padding: 0;
  }

  .doc__title::before,
  .doc h2::before {
    display: none;
  }

  .doc__title {
    font-size: 22pt;
  }

  .doc h2 {
    font-size: 14pt;
    margin-top: 18pt;
    break-after: avoid;
  }

  .doc p,
  .doc__list li {
    orphans: 3;
    widows: 3;
  }

  .doc__list li::marker {
    color: #000;
  }

  .doc__note {
    color: #333;
  }

  .doc__figure {
    width: 100%;
    margin: 8pt 0 0;
    break-inside: avoid;
  }

  /* Compact horizontal flow so the diagram fits the print page width.
     The stacked layout is screen-only, so the grid layout holds here. */
  .flow {
    font-size: 0.66rem;
  }

  .doc__download {
    display: none;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  @page {
    margin: 2cm;
  }
}