:root {
  /* Ultraviolet bureaucracy — default scheme, mapped from Common Pitch */
  --paper: #eef1f6;
  --paper-light: #fcfff6;
  --ink: #061449;
  --ink-muted: #465685;
  --rule: #8ea0f0;
  --rule-dark: #5e72c9;
  --signal: #efff00;
  --vermilion: #0038ff;
  --grid-line: rgb(0 56 255 / 0.08);
  --sans: Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --page-gutter: clamp(1.25rem, 3vw, 3.5rem);
  --section-gap: clamp(5rem, 10vw, 10rem);
}

html[data-theme="suited-chili"] {
  /* Suited chili — alternate scheme, mapped from Common Pitch */
  --paper: #f0e2cb;
  --paper-light: #fff5e6;
  --ink: #2c0d08;
  --ink-muted: #75463b;
  --rule: #d8795f;
  --rule-dark: #b44732;
  --signal: #ffd21f;
  --vermilion: #ff4b1f;
  --grid-line: rgb(104 20 12 / 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent calc(100% - 1px), var(--grid-line) 1px),
    var(--paper);
  background-size: calc((100vw - (2 * var(--page-gutter))) / 12) 100%;
  background-position: var(--page-gutter) 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

p,
h1,
h2,
h3,
figure {
  margin-top: 0;
}

.mono {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.055em;
  line-height: 1.35;
  text-transform: uppercase;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: var(--paper-light);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 3fr 3fr 6fr auto;
  align-items: center;
  min-height: 5.25rem;
  margin: 0 var(--page-gutter);
  border-bottom: 1px solid var(--ink);
}

.wordmark {
  display: inline-flex;
  gap: 0.8rem;
  align-items: center;
  width: max-content;
  font-weight: 650;
  text-decoration: none;
}

.wordmark-index {
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.7rem;
}

.header-status {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin: 0;
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-dot {
  width: 0.55rem;
  height: 0.55rem;
  background: var(--signal);
  border: 1px solid var(--ink);
  border-radius: 50%;
}

nav {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.75rem);
  justify-content: flex-end;
}

nav a {
  padding: 0.4rem 0;
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.04em;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25rem;
  text-transform: uppercase;
}

.theme-trigger {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-left: clamp(1rem, 2.5vw, 2.75rem);
  padding: 0.42rem 0.48rem 0.42rem 0.68rem;
  color: var(--ink);
  background: var(--paper-light);
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}

.theme-trigger:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 2px;
}

.theme-swatch {
  position: relative;
  display: block;
  width: 1.3rem;
  height: 1.3rem;
  overflow: hidden;
  background: var(--signal);
  border: 1px solid var(--ink);
}

.theme-swatch::after {
  position: absolute;
  inset: 0 50% 0 0;
  background: var(--vermilion);
  content: "";
}

.hero {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  min-height: calc(100vh - 5.25rem);
  margin: 0 var(--page-gutter);
  padding: clamp(2rem, 5vw, 5.5rem) 0 2rem;
  border-bottom: 1px solid var(--ink);
}

.hero-meta {
  grid-column: 1 / 3;
  color: var(--ink-muted);
}

.hero-meta p {
  margin-bottom: 0.3rem;
}

.hero-thesis {
  grid-column: 3 / 12;
  align-self: start;
}

.eyebrow {
  margin-bottom: clamp(2rem, 5vw, 5.5rem);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1 {
  max-width: 12ch;
  margin-bottom: clamp(3rem, 6vw, 7rem);
  font-family: var(--serif);
  font-size: clamp(4.3rem, 8.7vw, 9.5rem);
  font-weight: 400;
  letter-spacing: -0.072em;
  line-height: 0.82;
}

h1 span {
  display: block;
}

h1 span:first-child {
  margin-left: 0.65em;
  font-style: italic;
}

h1 span:last-child {
  color: var(--vermilion);
}

.hero-brief {
  grid-column: 3 / 7;
  align-self: end;
  padding-right: clamp(1rem, 3vw, 3rem);
}

.hero-brief p {
  max-width: 42rem;
  margin-bottom: 0;
}

.hero-brief p + p {
  margin-top: 1.5rem;
  color: var(--ink-muted);
}

.hero-brief .lead {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1.8vw, 1.75rem);
  line-height: 1.25;
}

.system-figure {
  grid-column: 8 / 13;
  align-self: end;
  margin-bottom: 0;
  padding-left: clamp(1rem, 3vw, 3rem);
  border-left: 1px solid var(--rule);
}

.system-figure svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.figure-lines {
  fill: none;
  stroke: var(--rule-dark);
  stroke-width: 1;
}

#arrow path {
  fill: var(--rule-dark);
}

.figure-nodes circle {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 1.4;
}

.figure-nodes .figure-center {
  fill: var(--signal);
}

.figure-labels {
  fill: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
}

.figure-labels .center-label {
  font-size: 9px;
  text-anchor: middle;
}

.system-figure figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-muted);
  font-size: 0.74rem;
}

.register-section {
  display: grid;
  grid-template-columns: 2fr 10fr;
  gap: 0;
  margin: 0 var(--page-gutter);
  padding-top: var(--section-gap);
}

.section-index {
  padding-right: clamp(1rem, 3vw, 3rem);
}

.section-index p:last-child {
  max-width: 11rem;
  color: var(--ink-muted);
  font-family: var(--serif);
  font-style: italic;
}

.section-content {
  min-width: 0;
  padding-bottom: var(--section-gap);
  border-bottom: 1px solid var(--ink);
}

.section-heading {
  display: grid;
  grid-template-columns: 7fr 3fr;
  gap: 2rem;
  align-items: end;
  margin-bottom: clamp(3rem, 6vw, 6rem);
}

.section-heading h2,
.premise-copy h2,
.footer-title h2 {
  margin-bottom: 0;
  font-family: var(--serif);
  font-size: clamp(2.7rem, 5.5vw, 6.25rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.96;
}

.section-heading > p {
  max-width: 26rem;
  margin-bottom: 0.3rem;
  color: var(--ink-muted);
}

.premise-copy h2 {
  max-width: 12ch;
  margin-bottom: clamp(3rem, 6vw, 6rem);
}

.copy-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
}

.copy-columns p {
  max-width: 34rem;
  margin: 0;
  font-size: clamp(1rem, 1.2vw, 1.2rem);
}

.copy-columns p:first-child::first-letter {
  float: left;
  margin: 0.07em 0.12em 0 0;
  color: var(--vermilion);
  font-family: var(--serif);
  font-size: 4.8em;
  line-height: 0.72;
}

.workstream-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.workstream-list li {
  display: grid;
  grid-template-columns: 1fr 3fr 5fr 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--rule);
}

.workstream-list h3 {
  margin-bottom: 0;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.4vw, 2.6rem);
  font-weight: 400;
  letter-spacing: -0.03em;
}

.workstream-list p {
  max-width: 40rem;
  margin: 0;
  color: var(--ink-muted);
}

.stream-state {
  justify-self: end;
  padding: 0.25rem 0.4rem;
  border: 1px solid var(--rule-dark);
}

.matrix {
  border-top: 1px solid var(--ink);
}

.matrix-row {
  display: grid;
  grid-template-columns: 3fr 4fr 3fr;
  gap: clamp(1.25rem, 3vw, 3rem);
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}

.matrix-row span {
  max-width: 34rem;
}

.matrix-row span:first-child {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 1.6vw, 1.5rem);
}

.matrix-header {
  padding: 0.65rem 0;
  color: var(--ink-muted);
}

.matrix-header span:first-child {
  font-family: inherit;
  font-size: inherit;
}

.protocol-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

.protocol-grid article {
  min-height: 18rem;
  padding: clamp(1.5rem, 3vw, 3rem);
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.protocol-number {
  color: var(--ink-muted);
}

.protocol-grid h3 {
  max-width: 12ch;
  margin: 4rem 0 1.5rem;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.4vw, 3.6rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1;
}

.protocol-grid article p:last-child {
  max-width: 30rem;
  margin-bottom: 0;
  color: var(--ink-muted);
}

.inquiry {
  display: grid;
  grid-template-columns: 3fr 7fr;
  gap: clamp(2rem, 5vw, 5rem);
  margin-top: clamp(4rem, 8vw, 8rem);
  padding: clamp(1.5rem, 3vw, 3rem);
  color: var(--paper-light);
  background: var(--ink);
}

.inquiry > div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  min-height: 11rem;
}

.provisional {
  padding: 0.35rem 0.5rem;
  color: var(--ink);
  background: var(--signal);
}

.inquiry > p {
  max-width: 22ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.5vw, 4rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.site-footer {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(2rem, 5vw, 5rem);
  min-height: 75vh;
  margin-top: var(--section-gap);
  padding: var(--section-gap) var(--page-gutter) 2rem;
  color: var(--paper-light);
  background: var(--ink);
}

.footer-title h2 {
  max-width: 11ch;
  margin-top: clamp(2rem, 5vw, 5rem);
}

.footer-contact {
  align-self: center;
}

.footer-contact p {
  color: #b9c1c2;
}

.footer-contact a {
  display: inline-block;
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 3.2rem);
  text-decoration-color: var(--signal);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.25em;
}

.footer-meta {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, 1fr);
  align-self: end;
  padding-top: 1rem;
  border-top: 1px solid #6f7b80;
  color: #b9c1c2;
}

.footer-meta p {
  margin-bottom: 0;
}

.footer-meta p:last-child {
  text-align: right;
}

@media (max-width: 900px) {
  body {
    background-size: calc((100vw - (2 * var(--page-gutter))) / 4) 100%;
  }

  .site-header {
    grid-template-columns: 1fr auto;
    min-height: 4.5rem;
  }

  .header-status {
    justify-self: end;
  }

  nav {
    grid-column: 1 / -1;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-top: 1px solid var(--rule);
  }

  .theme-trigger {
    grid-column: 1 / -1;
    justify-self: start;
    margin-left: 0;
  }

  .hero {
    min-height: auto;
    padding-top: 2rem;
  }

  .hero-meta {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: repeat(2, 1fr);
    margin-bottom: 4rem;
  }

  .hero-meta p:nth-child(even) {
    text-align: right;
  }

  .hero-thesis {
    grid-column: 1 / -1;
  }

  h1 {
    font-size: clamp(4rem, 16vw, 7rem);
  }

  .hero-brief {
    grid-column: 1 / 8;
    padding-right: 1rem;
  }

  .system-figure {
    grid-column: 8 / 13;
    padding-left: 1rem;
  }

  .register-section {
    grid-template-columns: 1fr;
  }

  .section-index {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 0 1rem;
    border-bottom: 1px solid var(--rule);
  }

  .section-index p {
    margin-bottom: 0;
  }

  .section-index p:last-child {
    text-align: right;
  }

  .section-content {
    padding-top: 2rem;
  }

  .section-heading {
    grid-template-columns: 1fr;
  }

  .copy-columns {
    gap: 2rem;
  }

  .workstream-list li {
    grid-template-columns: 1fr 3fr 6fr;
  }

  .stream-state {
    display: none;
  }
}

@media (max-width: 640px) {
  :root {
    --page-gutter: 1.1rem;
    --section-gap: 5rem;
  }

  .wordmark-index {
    width: 1.9rem;
    height: 1.9rem;
  }

  .header-status {
    max-width: 9rem;
    text-align: right;
  }

  nav a {
    font-size: 0.59rem;
  }

  .hero {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .hero-meta,
  .hero-thesis,
  .hero-brief,
  .system-figure {
    grid-column: 1 / -1;
  }

  .eyebrow {
    max-width: 20rem;
    margin-bottom: 3rem;
  }

  h1 {
    margin-bottom: 4rem;
    font-size: clamp(2.95rem, 14.8vw, 5.8rem);
    line-height: 0.87;
  }

  h1 span:first-child {
    margin-left: 0;
  }

  .hero-brief {
    padding: 0;
  }

  .system-figure {
    margin-top: 4rem;
    padding: 2rem 0 0;
    border-top: 1px solid var(--rule);
    border-left: 0;
  }

  .system-figure figcaption {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-heading h2,
  .premise-copy h2,
  .footer-title h2 {
    font-size: clamp(2.8rem, 14vw, 4.8rem);
  }

  .copy-columns {
    grid-template-columns: 1fr;
  }

  .workstream-list li {
    grid-template-columns: 3.5rem 1fr;
    gap: 0.75rem;
    padding: 1.4rem 0;
  }

  .workstream-list p {
    grid-column: 2;
  }

  .matrix-header {
    display: none;
  }

  .matrix-row {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .matrix-row span {
    position: relative;
    padding-left: 5.2rem;
  }

  .matrix-row span::before {
    position: absolute;
    left: 0;
    color: var(--ink-muted);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .matrix-row span:nth-child(1)::before {
    content: "Pressure";
  }

  .matrix-row span:nth-child(2)::before {
    content: "Method";
  }

  .matrix-row span:nth-child(3)::before {
    content: "Output";
  }

  .protocol-grid {
    grid-template-columns: 1fr;
  }

  .protocol-grid article {
    min-height: 16rem;
  }

  .inquiry {
    grid-template-columns: 1fr;
  }

  .inquiry > div {
    min-height: auto;
    flex-direction: row;
    align-items: center;
  }

  .site-footer {
    grid-template-columns: 1fr;
    min-height: 90vh;
  }

  .footer-contact {
    align-self: start;
  }

  .footer-contact a {
    font-size: clamp(1.4rem, 7vw, 2.2rem);
  }

  .footer-meta {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 0.75rem;
  }

  .footer-meta p:nth-child(even) {
    text-align: right;
  }
}

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

@media print {
  body {
    background: white;
  }

  nav,
  .skip-link {
    display: none;
  }

  .hero,
  .site-footer {
    min-height: auto;
  }

  .register-section,
  .site-footer {
    break-inside: avoid;
  }
}