/* Collective Direction - a routing ledger where many implementation traces
   converge on one human-held direction. Unique to this essay. */

:root {
  color-scheme: light;
  --field: #d8dde0;
  --paper: #f5f1e7;
  --paper-deep: #e9e2d3;
  --ink: #171c21;
  --ink-soft: #565f64;
  --grid: rgba(28, 55, 72, 0.105);
  --line: #a8afb0;
  --cobalt: #16548e;
  --rust: #a54c31;
  --signal: #c91e38;
  --focus: #005fcc;
  --body-size: clamp(1.04rem, 0.98rem + 0.3vw, 1.2rem);
}

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

html {
  scroll-behavior: smooth;
  background: var(--field);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.28), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.22)),
    var(--field);
  font-family: "IBM Plex Serif", "Iowan Old Style", Georgia, serif;
}

a {
  color: var(--cobalt);
  text-decoration-thickness: 0.075em;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #0b345a;
  text-decoration-thickness: 0.12em;
}

a:focus-visible {
  border-radius: 2px;
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

::selection {
  color: var(--ink);
  background: #f0afba;
}

.skip-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 20;
  padding: 0.65rem 0.9rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink);
  font: 600 0.78rem/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}

.skip-link:focus {
  top: 1rem;
}

.site-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem 2rem;
  max-width: 94rem;
  margin: 0 auto;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  font: 500 0.78rem/1.5 "IBM Plex Sans", "Segoe UI", sans-serif;
  letter-spacing: 0.035em;
}

.site-top nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.4rem;
}

.site-top a {
  color: var(--ink);
}

.site-top .brand {
  font-weight: 700;
  text-decoration: none;
}

.site-top [aria-current="page"] {
  color: var(--signal);
  text-decoration: none;
}

.machine-sheet {
  position: relative;
  max-width: 94rem;
  margin: 0 auto 4rem;
  overflow: hidden;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 1.5rem 1.5rem;
  border: 1px solid #98a0a2;
  box-shadow: 0 1.5rem 4rem rgba(24, 35, 42, 0.2);
}

.machine-sheet::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0.42rem;
  background: var(--signal);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(22rem, 0.88fr);
  gap: clamp(2rem, 6vw, 7rem);
  align-items: center;
  min-height: 43rem;
  padding: clamp(3.5rem, 8vw, 8rem) clamp(1.6rem, 6vw, 6rem) clamp(3rem, 7vw, 6rem);
  background: rgba(245, 241, 231, 0.82);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow,
.byline,
.section-index,
.rail-note,
.article-footer {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

.eyebrow {
  margin: 0 0 2.3rem;
  color: var(--rust);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: clamp(3rem, 6.7vw, 7rem);
  font-weight: 650;
  letter-spacing: -0.075em;
  line-height: 0.94;
  text-wrap: balance;
}

.deck {
  max-width: 31rem;
  margin: 2.2rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.12rem, 1rem + 0.55vw, 1.48rem);
  font-style: italic;
  line-height: 1.45;
}

.byline {
  margin: 2.2rem 0 0;
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.7;
}

.draft-mark {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.08rem 0.35rem;
  color: var(--signal);
  border: 1px solid currentColor;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.routing-map {
  width: 100%;
  height: auto;
  max-height: 34rem;
  color: var(--ink-soft);
  filter: drop-shadow(0 0.45rem 0 rgba(22, 84, 142, 0.08));
}

.routing-map path,
.routing-map line,
.routing-map circle {
  vector-effect: non-scaling-stroke;
}

.routing-map .route {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.routing-map .route--blue {
  color: var(--cobalt);
}

.routing-map .route--rust {
  color: var(--rust);
}

.routing-map .direction {
  stroke: var(--signal);
  stroke-width: 8;
}

.routing-map circle {
  fill: var(--paper);
  stroke: currentColor;
  stroke-width: 2;
}

.routing-map .decision {
  fill: var(--signal);
  stroke: var(--paper);
  stroke-width: 4;
}

.reading-grid {
  display: grid;
  grid-template-columns: minmax(7rem, 12rem) minmax(0, 43rem) minmax(2rem, 1fr);
  gap: clamp(1.5rem, 4vw, 5rem);
  justify-content: center;
  padding: clamp(3rem, 7vw, 6rem) clamp(1.4rem, 5vw, 5rem) 6rem;
  background: rgba(245, 241, 231, 0.72);
}

.direction-rail {
  position: relative;
  grid-column: 1;
  min-height: 100%;
  border-right: 1px solid var(--line);
}

.direction-rail::before {
  content: "";
  position: absolute;
  top: 0;
  right: -2px;
  width: 3px;
  height: 34%;
  background: var(--signal);
}

.rail-note {
  position: sticky;
  top: 1.5rem;
  max-width: 12ch;
  margin: 0;
  padding-right: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.66rem;
  line-height: 1.65;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rail-note::after {
  content: "";
  display: block;
  width: 0.62rem;
  height: 0.62rem;
  margin-top: 1.2rem;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 0.35rem var(--paper), 0 0 0 0.42rem var(--signal);
}

.article-body {
  grid-column: 2;
  min-width: 0;
  font-size: var(--body-size);
  line-height: 1.72;
}

.article-body > p,
.article-body section > p {
  margin: 0 0 1.45em;
  text-align: justify;
  text-wrap: pretty;
  hyphens: auto;
  orphans: 3;
  widows: 3;
}

.article-body > p:first-child::first-letter {
  float: left;
  margin: 0.08em 0.1em 0 0;
  color: var(--signal);
  font: 650 4.25em/0.76 "IBM Plex Sans", "Segoe UI", sans-serif;
}

.article-section {
  position: relative;
  margin-top: 4.5rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
}

.article-section::before {
  content: "";
  position: absolute;
  top: -0.34rem;
  left: 0;
  width: 0.68rem;
  height: 0.68rem;
  background: var(--paper);
  border: 2px solid var(--cobalt);
  border-radius: 50%;
}

.section-index {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--rust);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

h2 {
  max-width: 20ch;
  margin: 0 0 1.6rem;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: clamp(1.65rem, 1.25rem + 1.5vw, 2.55rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1.1;
  text-wrap: balance;
}

.article-section--boundary {
  margin-inline: clamp(-2rem, -4vw, -1rem);
  padding-inline: clamp(1rem, 4vw, 2rem);
  padding-bottom: 0.25rem;
  background:
    linear-gradient(90deg, rgba(201, 30, 56, 0.08), transparent 24%),
    rgba(233, 226, 211, 0.45);
  border-top-color: rgba(165, 76, 49, 0.6);
}

.article-section--boundary::before {
  left: clamp(1rem, 4vw, 2rem);
  border-color: var(--signal);
}

.article-section--boundary .section-index {
  color: var(--signal);
}

.article-footer {
  grid-column: 2;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.7;
}

.article-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.4rem;
}

@media (max-width: 66rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.72fr);
    gap: 2rem;
  }

  .reading-grid {
    grid-template-columns: 6rem minmax(0, 43rem);
  }
}

@media (max-width: 48rem) {
  .site-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 4rem;
  }

  h1 {
    font-size: clamp(2.65rem, 13vw, 4.7rem);
  }

  .routing-map {
    max-height: 18rem;
  }

  .reading-grid {
    display: block;
    padding-inline: clamp(1.3rem, 5vw, 2.3rem);
  }

  .direction-rail {
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .direction-rail::before {
    top: auto;
    right: auto;
    bottom: -2px;
    left: 0;
    width: 34%;
    height: 3px;
  }

  .rail-note {
    position: static;
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: none;
    padding: 0;
  }

  .rail-note::after {
    flex: none;
    order: -1;
    margin: 0 0 0 0.4rem;
  }

  .article-body > p,
  .article-body section > p {
    hyphens: none;
    text-align: left;
  }

  .article-section {
    margin-top: 3.5rem;
  }

  .article-section--boundary {
    margin-inline: -0.7rem;
    padding-inline: 0.7rem;
  }
}

@media (prefers-contrast: more) {
  :root {
    --field: #fff;
    --paper: #fff;
    --paper-deep: #fff;
    --ink: #000;
    --ink-soft: #222;
    --grid: rgba(0, 0, 0, 0.14);
    --line: #555;
    --cobalt: #003f7a;
    --rust: #752a12;
    --signal: #a4001d;
  }
}

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

@media print {
  body {
    background: #fff;
  }

  .site-top,
  .direction-rail {
    display: none;
  }

  .machine-sheet {
    margin: 0;
    border: 0;
    box-shadow: none;
  }

  .hero {
    min-height: auto;
    padding: 1.5cm 1.4cm 1cm;
  }

  .reading-grid {
    display: block;
    padding: 1cm 1.4cm;
  }

  .article-body {
    max-width: none;
    font-size: 10.5pt;
  }

  .article-section h2,
  .article-section .section-index {
    break-after: avoid-page;
  }
}