:root {
  --black: #090909;
  --panel: #121212;
  --panel-2: #181818;
  --white: #f4f3ee;
  --muted: #aaa9a2;
  --line: #34342f;
  --yellow: #ffd60a;
  --green: #0aa56b;
  --red: #e05249;
  --blue: #609ee8;
  --purple: #a77bd5;
}

* { box-sizing: border-box; }

html {
  background: var(--black);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 52% 9%, rgba(255, 214, 10, .045), transparent 28rem),
    var(--black);
}

.mast,
main,
footer {
  width: min(1780px, calc(100% - 48px));
  margin-inline: auto;
}

.mast {
  padding: 52px 0 42px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.section-label,
.stage__type {
  color: var(--yellow);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1 {
  max-width: 1100px;
  margin: 13px 0 14px;
  font-size: clamp(2rem, 4vw, 4.4rem);
  line-height: .98;
  letter-spacing: -.045em;
}

.mast > p {
  max-width: 940px;
  margin: 0;
  color: #d1d0ca;
  font-size: clamp(.95rem, 1.25vw, 1.15rem);
  line-height: 1.55;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 25px;
  margin-top: 26px;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.legend span { display: flex; align-items: center; gap: 8px; }

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.dot--model { background: var(--purple); }
.dot--research { background: var(--blue); }
.dot--code { background: var(--yellow); }
.dot--human { border: 2px solid var(--white); }

.pipeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 0;
  padding: 58px 0 70px;
}

.stage {
  position: relative;
  display: flex;
  min-height: 570px;
  padding: 25px 24px 22px;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--panel);
}

.stage--primary {
  border: 2px solid var(--yellow);
  background: #17150b;
}

.stage__number {
  color: #5f5e58;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -.06em;
}

.stage__type {
  min-height: 30px;
  margin-top: 8px;
}

.stage--model .stage__type { color: var(--purple); }
.stage--research .stage__type { color: var(--blue); }
.stage--code .stage__type { color: var(--yellow); }

.stage h2 {
  margin: 12px 0 10px;
  font-size: 1.35rem;
  line-height: 1.05;
  letter-spacing: -.025em;
}

.stage > p {
  margin: 0;
  color: #bdbcb5;
  font-size: .84rem;
  line-height: 1.48;
}

.connector {
  display: none;
}

.stage:not(:last-child)::after {
  position: absolute;
  z-index: 5;
  top: 46%;
  right: -14px;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--black);
  content: "→";
  font-size: 1rem;
  font-weight: 900;
  line-height: 27px;
  text-align: center;
}

.stage:nth-of-type(1) { grid-area: 1 / 1; }
.stage:nth-of-type(2) { grid-area: 1 / 2; }
.stage:nth-of-type(3) { grid-area: 1 / 3; }
.stage:nth-of-type(4) { grid-area: 2 / 3; }
.stage:nth-of-type(5) { grid-area: 2 / 2; }
.stage:nth-of-type(6) { grid-area: 2 / 1; }
.stage:nth-of-type(7) { grid-area: 3 / 1; }
.stage:nth-of-type(8) { grid-area: 3 / 2; }
.stage:nth-of-type(9) { grid-area: 3 / 3; }
.stage:nth-of-type(10) { grid-area: 4 / 3; }
.stage:nth-of-type(11) { grid-area: 4 / 2; }
.stage:nth-of-type(12) { grid-area: 4 / 1; }

.stage:nth-of-type(3)::after,
.stage:nth-of-type(6)::after,
.stage:nth-of-type(9)::after {
  top: auto;
  right: calc(50% - 14px);
  bottom: -14px;
  content: "↓";
}

.stage:nth-of-type(4)::after,
.stage:nth-of-type(5)::after,
.stage:nth-of-type(10)::after,
.stage:nth-of-type(11)::after {
  right: auto;
  left: -14px;
  content: "←";
}

.artifact {
  margin-top: auto;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  color: #aaa9a2;
  font-size: .72rem;
  line-height: 1.35;
}

.artifact b {
  display: block;
  margin-bottom: 4px;
  color: var(--white);
  font-size: .59rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.artifact--strong {
  margin-inline: -24px;
  padding: 16px 24px 0;
  border-color: var(--yellow);
  color: var(--yellow);
}

.stage__input {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 7px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid #292925;
  color: #aaa9a2;
  font-size: .67rem;
  line-height: 1.35;
}

.stage__input b {
  color: var(--white);
  font-size: .58rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.models {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 11px;
}

.models span {
  padding: 5px 7px;
  border: 1px solid rgba(167, 123, 213, .55);
  border-radius: 999px;
  color: #d8c4ed;
  font-size: .58rem;
  line-height: 1;
}

.models .model--code {
  border-color: rgba(255, 214, 10, .55);
  color: var(--yellow);
}

.stage--research .models span {
  border-color: rgba(96, 158, 232, .6);
  color: #b9d9ff;
}

.prompt-links {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 10px;
}

.prompt-links button {
  padding: 6px 8px;
  border: 1px solid #4b4a44;
  background: transparent;
  color: #d5d4cd;
  cursor: pointer;
  font: inherit;
  font-size: .6rem;
  font-weight: 700;
}

.prompt-links button::after {
  margin-left: 5px;
  color: var(--yellow);
  content: "↗";
}

.prompt-links button:hover,
.prompt-links button:focus-visible {
  border-color: var(--yellow);
  color: var(--yellow);
  outline: none;
}

.mini-flow,
.split,
.checks,
.outputs,
.ontology {
  display: grid;
  gap: 5px;
  margin-top: 18px;
}

.mini-flow {
  grid-template-columns: repeat(3, 1fr);
}

.mini-flow span,
.split span,
.checks span,
.outputs span {
  padding: 7px;
  border: 1px solid var(--line);
  color: #d1d0ca;
  font-size: .63rem;
  text-align: center;
}

.mini-flow b {
  grid-column: 1 / -1;
  padding: 8px;
  background: rgba(255, 214, 10, .11);
  color: var(--yellow);
  font-size: .63rem;
  text-align: center;
}

.split { grid-template-columns: 1fr 1fr; }
.split__support { border-color: var(--green) !important; }
.split__challenge { border-color: var(--red) !important; }

.ontology {
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.ontology__claim {
  padding: 13px 7px;
  background: var(--white);
  color: var(--black);
  font-size: .68rem;
  font-weight: 800;
  text-align: center;
}

.ontology__relation {
  color: var(--muted);
  font-size: .58rem;
}

.checks,
.outputs { grid-template-columns: 1fr 1fr; }

.claim-record,
.boundary {
  padding: 68px 0;
  border-top: 1px solid var(--line);
}

.claim-record > div:first-child {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 25px;
  align-items: baseline;
}

.claim-record h2,
.boundary h2 {
  margin: 0;
  font-size: clamp(1.4rem, 2.5vw, 2.7rem);
  letter-spacing: -.035em;
}

.facets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 34px;
  background: var(--line);
}

.facets article {
  min-height: 225px;
  padding: 28px;
  background: var(--panel);
}

.facets h3 {
  margin: 30px 0 8px;
  font-size: 1rem;
}

.facets p,
.boundary li,
.current-run {
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.5;
}

.facet-icon {
  display: block;
  width: 24px;
  height: 24px;
  border-radius: 50%;
}

.facet-icon--positive { background: var(--green); }
.facet-icon--depth {
  border: 1px solid var(--muted);
  background: conic-gradient(var(--white) 0 .6turn, transparent .6turn 1turn);
}
.facet-icon--coverage {
  border: 2px dashed var(--blue);
  background: rgba(96, 158, 232, .18);
}
.facet-icon--dependence {
  border: 5px double var(--purple);
}

.boundary__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 30px;
  background: var(--line);
}

.boundary__grid article {
  padding: 30px;
  background: var(--panel);
}

.boundary__grid h2 { font-size: 1.25rem; }
.boundary ul { margin: 18px 0 0; padding-left: 20px; }
.boundary li + li { margin-top: 7px; }

.current-run {
  margin: 1px 0 0;
  padding: 20px 30px;
  background: var(--panel-2);
}

.current-run b { color: var(--yellow); }

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 0 50px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .7rem;
}

footer a {
  color: var(--yellow);
  font-weight: 800;
  text-decoration: none;
}

#prompt-dialog {
  width: min(900px, calc(100% - 32px));
  max-height: min(86vh, 900px);
  padding: 32px;
  border: 1px solid #56554e;
  background: #101010;
  color: var(--white);
  box-shadow: 0 30px 100px rgba(0, 0, 0, .75);
}

#prompt-dialog::backdrop {
  background: rgba(0, 0, 0, .78);
  backdrop-filter: blur(2px);
}

.dialog__close {
  position: absolute;
  top: 16px;
  right: 18px;
  border: 0;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font-size: 1.8rem;
}

.dialog__eyebrow {
  color: var(--yellow);
  font-size: .62rem;
  font-weight: 800;
  letter-spacing: .12em;
}

#prompt-dialog h2 {
  margin: 10px 45px 8px 0;
  font-size: clamp(1.4rem, 3vw, 2.25rem);
  letter-spacing: -.035em;
}

.dialog__meta {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: .74rem;
  line-height: 1.45;
}

#prompt-text {
  max-height: 58vh;
  margin: 0;
  padding: 20px;
  overflow: auto;
  border: 1px solid #34342f;
  background: #080808;
  color: #d8d7d0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .72rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

@media (max-width: 1100px) {
  .mast,
  main,
  footer { width: min(100% - 28px, 1780px); }

  .pipeline {
    display: block;
    overflow: visible;
  }

  .stage {
    grid-area: auto !important;
    min-height: 0;
    margin-bottom: 28px;
  }

  .stage:not(:last-child)::after,
  .stage:nth-of-type(3)::after,
  .stage:nth-of-type(4)::after,
  .stage:nth-of-type(5)::after,
  .stage:nth-of-type(6)::after,
  .stage:nth-of-type(9)::after,
  .stage:nth-of-type(10)::after,
  .stage:nth-of-type(11)::after {
    top: auto;
    right: calc(50% - 14px);
    left: auto;
    bottom: -28px;
    content: "↓";
  }

  .artifact { margin-top: 28px; }

  .claim-record > div:first-child,
  .boundary__grid { grid-template-columns: 1fr; }

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

@media (max-width: 560px) {
  .mast { padding-top: 34px; }
  .facets { grid-template-columns: 1fr; }
  .legend { display: grid; grid-template-columns: 1fr 1fr; }
  footer { flex-direction: column; }
  #prompt-dialog { padding: 24px 18px; }
}