/* Open Colophon
   Ink on paper. No accent colour: a registry that takes no side on AI
   should not have a brand colour telling you which side it is on.
   No webfonts, no CDN, no build step — the site must be servable from
   a folder in twenty years. */

:root {
  --paper:  #ffffff;
  --ink:    #0a0a0a;
  --rule:   #d4d4d4;
  --held:   #8a8a8a;   /* held, not published */
  --measure: 34rem;
  --gutter: clamp(1.5rem, 6vw, 7rem);
  --grotesk: "Helvetica Neue", Helvetica, Arial, "Inter", system-ui, sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--grotesk);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--ink); }
a:hover { background: var(--ink); color: var(--paper); border-bottom-color: transparent; }
a:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; background: none; color: inherit; }

/* ------------------------------------------------------------ masthead */

.masthead {
  padding: var(--gutter) var(--gutter) 0;
}

.wordmark {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0;
}

.wordmark a { border: 0; }
.wordmark a:hover { background: none; color: inherit; }

/* ------------------------------------------------------------ headline */

.hero {
  padding: clamp(3rem, 11vh, 8rem) var(--gutter) 0;
}

.hero__headline {
  font-size: clamp(2.8rem, 11vw, 8.5rem);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  margin: 0;
  max-width: 15ch;
}

.hero__standfirst {
  margin: clamp(2rem, 5vh, 3.5rem) 0 0;
  max-width: var(--measure);
  font-size: 1.06rem;
}

.hero__standfirst + .hero__standfirst { margin-top: 1.1rem; }

/* --------------------------------------------------------- the ladder
   The signature. A colophon is a list of production facts, each either
   stated or not. Filled bars are conventions books already keep; the
   open bar is the one this registry exists for. It is drawn empty on
   purpose, and it stays empty until somebody fills it. */

.ladder {
  padding: clamp(4rem, 12vh, 9rem) var(--gutter) 0;
}

.ladder__list { list-style: none; margin: 0; padding: 0; max-width: 46rem; }

.ladder__row {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  padding: 0.55rem 0;
}

.ladder__label {
  flex: 0 0 9.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ladder__bar {
  height: 13px;
  background: var(--ink);
  transform-origin: left center;
}

.ladder__row--open .ladder__bar {
  background: transparent;
  border: 1px solid var(--ink);
}

.ladder__row--open .ladder__label { font-weight: 700; }

.ladder__note {
  margin: 2.25rem 0 0;
  max-width: var(--measure);
  font-size: 0.95rem;
}

@media (prefers-reduced-motion: no-preference) {
  .ladder__bar { animation: draw 0.5s cubic-bezier(0.2, 0, 0, 1) backwards; }
  @keyframes draw { from { transform: scaleX(0); } to { transform: scaleX(1); } }
}

/* --------------------------------------------------------------- states */

.states { padding: clamp(4rem, 12vh, 9rem) var(--gutter) 0; }

.states__list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 46rem;
  border-top: 1px solid var(--ink);
}

.states__item {
  border-bottom: 1px solid var(--rule);
  padding: 1.1rem 0;
  display: flex;
  gap: 1.25rem;
  align-items: baseline;
}

.states__name {
  flex: 0 0 9.5rem;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.states__gloss { margin: 0; font-size: 0.98rem; }

/* --------------------------------------------------------- section head */

.eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 1.25rem;
}

/* --------------------------------------------------------------- prose */

.prose {
  padding: var(--gutter);
  max-width: calc(var(--measure) + var(--gutter) * 2);
}

.prose h1 {
  font-size: clamp(2.2rem, 7vw, 4rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin: 0 0 1.5rem;
}

.prose h2 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 3.5rem 0 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--ink);
}

.prose h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 2rem 0 0.6rem;
}

.prose p { margin: 0 0 1.1rem; }
.prose ul, .prose ol { margin: 0 0 1.1rem; padding-left: 1.1rem; }
.prose li { margin-bottom: 0.4rem; }
.prose strong { font-weight: 700; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.prose th, .prose td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 1rem 0.7rem 0;
  border-bottom: 1px solid var(--rule);
}

.prose th {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border-bottom-color: var(--ink);
}

.prose .version {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--held);
  margin-bottom: 3rem;
}

/* -------------------------------------------------------------- footer */

.footer {
  margin-top: clamp(5rem, 16vh, 11rem);
  padding: 2rem var(--gutter) 3.5rem;
  border-top: 1px solid var(--ink);
  font-size: 0.86rem;
}

.footer p { margin: 0 0 0.6rem; max-width: var(--measure); }
.footer p:last-child { margin-bottom: 0; }
.footer .footer__disclosure { color: var(--held); }

@media (max-width: 34rem) {
  .ladder__row, .states__item { flex-direction: column; gap: 0.4rem; }
  .ladder__label, .states__name { flex: none; }
  .ladder__bar { width: 100% !important; }
}

/* --- hero fit: bound the glyph column, size the headline to what's left */

.hero__grid { grid-template-columns: minmax(0, 1fr) clamp(4.5rem, 14vw, 12rem); }

.hero__figure img { width: 100%; height: auto; }

.hero__headline {
  font-size: clamp(2.3rem, 7vw, 6.2rem);
  max-width: 13ch;
  overflow-wrap: break-word;
}

@media (max-width: 46rem) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__figure img { width: auto; height: clamp(5rem, 12vh, 8rem); }
  .hero__headline { max-width: 100%; }
}

/* --- hero fit: bound the glyph column, size the headline to what's left */

.hero__grid { grid-template-columns: minmax(0, 1fr) clamp(4.5rem, 14vw, 12rem); }

.hero__figure img { width: 100%; height: auto; }

.hero__headline {
  font-size: clamp(2.3rem, 7vw, 6.2rem);
  max-width: 13ch;
  overflow-wrap: break-word;
}

@media (max-width: 46rem) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__figure img { width: auto; height: clamp(5rem, 12vh, 8rem); }
  .hero__headline { max-width: 100%; }
}

/* --- hero split: 70% text, 30% mark */

.hero__grid { grid-template-columns: 70% 30%; gap: 0; }

.hero__figure { padding-left: clamp(1rem, 3vw, 3rem); }
.hero__figure img { width: 100%; height: auto; }

.hero__headline { font-size: clamp(2.3rem, 6.4vw, 6.4rem); max-width: 100%; }

@media (max-width: 46rem) {
  .hero__grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero__figure { padding-left: 0; }
  .hero__figure img { width: auto; height: clamp(5rem, 12vh, 8rem); }
}

.hero__figure svg { display: block; width: 100%; height: auto; }

/* --- hero: text 70 / mark 30, definitive */

.hero__grid {
  display: grid !important;
  grid-template-columns: 70% 30%;
  align-items: start;
  gap: 0;
}

.hero__figure { margin: 0; padding-left: clamp(1rem, 3vw, 3rem); }

.hero__figure svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 70vh;
}

@media (max-width: 46rem) {
  .hero__grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero__figure { padding-left: 0; order: -1; }
  .hero__figure svg { width: auto; height: clamp(5rem, 12vh, 8rem); }
}