:root {
  color-scheme: light dark;
  --page: #f7f7f4;
  --surface: #ffffff;
  --surface-muted: #f0f1ed;
  --ink: #20221f;
  --muted: #5f645d;
  --line: #cfd2ca;
  --accent: #315f72;
  --accent-soft: #e5f0f3;
  --selected: #eaf3ed;
  --warning: #9a3f2f;
  --measure: 76rem;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--page);
  color: var(--ink);
  line-height: 1.5;
}

body {
  margin: 0;
}

main {
  width: min(100%, var(--measure));
  min-height: 100vh;
  margin-inline: auto;
  padding: clamp(1rem, 3vw, 3rem);
}

header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

header > p:first-child {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.version-line {
  margin-block: 0.65rem 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.application-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-block: 1rem 0;
}

.documentation-link {
  display: inline-block;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--accent);
  border-radius: 0.25rem;
  background: var(--accent);
  color: #ffffff;
  font-weight: 750;
  text-decoration: none;
}

.documentation-link:hover,
.documentation-link:focus-visible {
  filter: brightness(1.08);
  text-decoration: underline;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 650;
  letter-spacing: -0.035em;
}

h2 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}

h3 {
  margin-top: 1.6rem;
  font-size: 1rem;
}

p {
  max-width: 72ch;
}

a {
  color: var(--accent);
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible,
button:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

section,
nav,
aside,
footer {
  margin-block: 2rem;
}

form {
  max-width: 62rem;
}

label {
  font-weight: 650;
}

button,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  color: var(--ink);
  font: inherit;
}

button,
select {
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
}

button {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  filter: brightness(1.08);
}

textarea {
  display: block;
  width: 100%;
  min-height: 15rem;
  padding: 0.9rem 1rem;
  resize: vertical;
  background: var(--surface);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  line-height: 1.55;
}

textarea[readonly] {
  min-height: 10rem;
  background: var(--surface-muted);
}

[role="alert"] {
  max-width: none;
  padding: 0.8rem 1rem;
  border-left: 0.3rem solid var(--warning);
  background: color-mix(in srgb, var(--warning) 10%, var(--surface));
}

[data-concept="draft-origin"] {
  color: var(--muted);
}

.spa-status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html[data-spa-navigating] {
  cursor: progress;
}

[data-concept="stage-preview"],
[data-concept="depth-navigator"] {
  padding-block: 1.5rem;
  border-block: 1px solid var(--line);
}

[data-concept="stage-preview"] ol,
[data-concept="depth-navigator"] ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

[data-concept="stage-preview"] li,
[data-concept="depth-navigator"] li {
  min-height: 5.2rem;
  padding: 0.75rem 1rem;
  border-left: 0.2rem solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

[data-concept="stage-preview"] strong,
[data-concept="depth-navigator"] a {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--ink);
  font-weight: 750;
}

[data-concept="depth-navigator"] li:has([aria-current="step"]) {
  border-left-color: var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}

[aria-label="Step through enrichment"] {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-block: -0.75rem 2rem;
  color: var(--muted);
}

[data-concept="current-stage-output"] {
  padding-top: 1.25rem;
}

.layer-canvas {
  min-height: 18rem;
  padding: clamp(1rem, 2.5vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: var(--surface);
}

.layer-intro {
  margin-top: 0;
  color: var(--muted);
}

.source-document {
  max-width: 72ch;
  padding: clamp(1rem, 3vw, 2rem);
  border-left: 0.25rem solid var(--accent);
  background: var(--surface-muted);
  font-family: ui-serif, Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.8;
  white-space: pre-wrap;
}

.source-spans {
  max-height: 20rem;
  overflow-y: auto;
}

.linguistic-sentence {
  margin-block: 1.5rem;
}

.linguistic-sentence h3 {
  margin-block: 0 0.55rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.token-stream,
.phrase-bank,
.referent-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.linguistic-token,
.mention-phrase,
.referent-chip {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  background: var(--surface-muted);
  color: var(--ink);
  text-decoration: none;
}

.linguistic-token small,
.mention-phrase small,
.referent-chip small,
.role-list small,
.grounding-map small {
  color: var(--muted);
  font-size: 0.7rem;
}

.linguistic-token small {
  display: flex;
  gap: 0.35rem;
}

.linguistic-token small span + span::before {
  margin-right: 0.35rem;
  content: "·";
}

.linguistic-token:hover,
.mention-phrase:hover,
.referent-chip:hover {
  border-color: var(--accent);
}

.phrase-bank,
.referent-bank {
  margin-block: 1.25rem 2rem;
}

.mention-phrase {
  border-left: 0.25rem solid var(--accent);
}

.referent-chip {
  border-radius: 2rem;
  background: var(--selected);
}

.enrichment-cards,
.final-output {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.enrichment-card,
.structured-finding {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: var(--surface-muted);
}

.enrichment-card > header,
.structured-finding > header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 0.2rem 1rem;
  margin: 0 0 0.8rem;
  padding: 0 0 0.7rem;
}

.enrichment-card > header > p,
.structured-finding > header > p {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.enrichment-card h3,
.structured-finding h3 {
  margin: 0;
  font-size: 1.05rem;
}

.status-badge {
  padding: 0.15rem 0.45rem;
  border-radius: 1rem;
  background: var(--selected);
  color: var(--ink);
  font-size: 0.72rem;
  white-space: nowrap;
}

.role-list,
.finding-fields {
  margin: 0;
}

.role-list > div,
.finding-fields > div {
  display: grid;
  grid-template-columns: minmax(6rem, 0.7fr) minmax(0, 1.3fr);
  gap: 0.75rem;
  padding-block: 0.45rem;
  border-bottom: 1px solid var(--line);
}

.role-list dt,
.finding-fields dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: capitalize;
}

.role-list dd,
.finding-fields dd {
  margin: 0;
}

.role-list dd small {
  display: block;
}

[data-status="unresolved"] {
  color: var(--warning);
}

.grounding-map {
  display: grid;
  gap: 0.65rem;
}

.grounding-map article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-left: 0.25rem solid var(--line);
  background: var(--surface-muted);
}

.grounding-map article[data-grounding-status="accepted"] {
  border-left-color: var(--accent);
  background: var(--selected);
}

.grounding-map article > div {
  display: flex;
  flex-direction: column;
}

.structured-finding {
  background: var(--surface);
  box-shadow: inset 0 0 0 0.15rem var(--selected);
}

.frame-links {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.frame-links a {
  margin-right: 0.45rem;
}

.validation-summary {
  margin-bottom: 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.validation-summary ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem 1rem;
  padding: 0;
  list-style: none;
}

.validation-summary li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.84rem;
}

[data-focus-role="subject"] {
  outline: 0.2rem solid var(--accent);
  outline-offset: 0.15rem;
}

.object-index {
  margin-top: 1.5rem;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(18rem, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.workspace > aside {
  margin: 0;
  padding-left: 1.4rem;
  border-left: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

caption {
  padding-block: 0.5rem;
  color: var(--muted);
  text-align: left;
}

th,
td {
  padding: 0.6rem 0.7rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
}

th {
  background: var(--surface-muted);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

tr[data-focus-role="subject"] {
  background: var(--selected);
}

tr[data-focus-role="antecedent"] {
  background: var(--accent-soft);
}

pre,
code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9em;
}

code {
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  padding: 1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  background: var(--surface-muted);
  white-space: pre-wrap;
}

details {
  margin-block: 1rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

footer,
aside[aria-label="Proof-of-concept boundary"] {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #202321;
    --surface: #292d2a;
    --surface-muted: #323733;
    --ink: #f0f1ed;
    --muted: #b7bcb5;
    --line: #555d56;
    --accent: #8fc1d1;
    --accent-soft: #293d43;
    --selected: #2c4335;
    --warning: #ee8c78;
  }

  button {
    color: #152126;
  }
}

@media (max-width: 760px) {

  .application-links {
    align-items: flex-start;
    flex-direction: column;
  }

  [data-concept="stage-preview"] ol,
  [data-concept="depth-navigator"] ol {
    grid-template-columns: 1fr;
  }

  [data-concept="stage-preview"] li,
  [data-concept="depth-navigator"] li {
    min-height: auto;
  }

  [aria-label="Step through enrichment"],
  .workspace {
    display: block;
  }

  .enrichment-cards,
  .final-output,
  .validation-summary ul {
    grid-template-columns: 1fr;
  }

  .grounding-map article {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .grounding-map article > span {
    transform: rotate(90deg);
  }

  [aria-label="Step through enrichment"] > * {
    display: block;
    margin-block: 0.5rem;
  }

  .workspace > aside {
    margin-top: 2rem;
    padding: 1.5rem 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  table {
    display: block;
    overflow-x: auto;
  }
}