.line-documentation {
  --line-red: #a12f29;
  --line-muted: #626262;
  --line-column: 9.5rem;
  width: min(72rem, calc(100% - 2 * var(--page-x)));
  margin-top: 5rem;
}

.line-title {
  align-items: baseline;
}

.line-title > span {
  padding-bottom: 0;
}

.line-introduction {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 1rem 3rem;
  margin: 1.25rem 0 2.75rem;
}

.line-tagline {
  max-width: 32rem;
  margin: 0;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.4;
}

.line-photo,
.line-source-figure,
.line-call-flow {
  min-width: 0;
  margin: 0;
}

.line-photo img,
.line-source-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.line-photo figcaption,
.line-source-figure figcaption,
.line-call-flow figcaption {
  margin-top: 0.7rem;
  color: var(--line-muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.line-chapter {
  display: grid;
  grid-template-columns: var(--line-column) minmax(0, 42rem);
  gap: 0 1.5rem;
  margin: clamp(3.5rem, 8vw, 6rem) 0 2.75rem;
}

.line-chapter-copy {
  grid-column: 2;
}

.line-chapter-copy h2 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.45rem, 2.5vw, 1.85rem);
  line-height: 1.15;
  font-weight: 500;
}

.line-chapter-copy p,
.line-interlude p {
  margin: 0 0 1rem;
}

.line-chapter-copy p:last-child,
.line-interlude p:last-child {
  margin-bottom: 0;
}

.line-photo-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.line-agent-roles {
  display: grid;
  gap: 1.25rem;
  margin: 1.75rem 0 0;
}

.line-agent-roles > div {
  display: grid;
  grid-template-columns: 11.5rem minmax(0, 1fr);
  gap: 0.6rem 1.25rem;
  padding-top: 0.8rem;
  border-top: 1px solid #d5d5d5;
}

.line-agent-roles dt {
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.55;
}

.line-agent-roles dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

.line-source-figure {
  padding: 1.5rem;
  background: #f5f4f1;
}

.line-source-image {
  display: block;
}

.line-source-image:focus-visible,
.line-manual-link:focus-visible {
  outline: 2px solid var(--line-red);
  outline-offset: 0.3rem;
}

.line-source-note {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.6875rem;
}

.line-organisation {
  margin: 0 0 3.5rem calc(var(--line-column) + 1.5rem);
}

.line-call-flow {
  margin: 0 0 3.5rem;
}

.line-call-flow ol {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.line-call-flow li {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
  min-width: 0;
  padding: 1rem 1.25rem 0 0;
  font-size: 0.75rem;
  line-height: 1.5;
}

.line-call-flow li:last-child {
  padding-right: 0;
}

.line-call-flow .line-flow-step {
  margin-bottom: 0.2rem;
  color: var(--line-red);
  font-size: 0.6875rem;
}

.line-call-flow strong {
  font-size: 0.875rem;
  font-weight: 500;
}

.line-call-flow li > span:last-child {
  color: var(--line-muted);
}

.line-call-flow figcaption {
  margin-top: 1.75rem;
}

.line-interlude {
  width: min(42rem, calc(100% - var(--line-column) - 1.5rem));
  margin: 3.5rem 0 3.5rem calc(var(--line-column) + 1.5rem);
}

.line-status {
  font-size: 0.75em;
  letter-spacing: 0.03em;
}

.line-equipment-pair {
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.75fr);
  align-items: center;
  column-gap: clamp(1.5rem, 7vw, 6rem);
}

.line-tariff-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  align-items: start;
  gap: 3rem;
}

.line-tariff-layout .line-photo {
  margin-top: 3.5rem;
}

.line-manual-link {
  text-decoration-color: var(--line-red);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.line-manual-link:hover {
  color: var(--line-red);
  text-decoration-thickness: 2px;
}

.line-chapter-copy .line-manual-note {
  margin-top: 1.5rem;
  color: var(--line-muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.line-script-excerpt {
  max-width: 42rem;
  margin: 0 0 3.5rem calc(var(--line-column) + 1.5rem);
}

.line-documentation > .line-chapter:last-child {
  margin-bottom: 5rem;
}

.line-credits {
  max-width: 42rem;
  margin: 4rem 0 5rem calc(var(--line-column) + 1.5rem);
  padding-top: 1.5rem;
}

.line-credits h2 {
  margin: 0 0 2rem;
  font-size: 1.45rem;
  line-height: 1.2;
  font-weight: 500;
}

.line-credit-list {
  display: grid;
  gap: 1.5rem;
  margin: 0;
}

.line-credit-list > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 1.5rem;
}

.line-credit-list dt,
.line-credit-list dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
}

.line-credit-list dt { color: var(--line-muted); }

@media (max-width: 900px) {
  .line-documentation {
    --line-column: 4rem;
  }

  .line-introduction {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .line-tariff-layout {
    gap: 1.5rem;
  }
}

@media (max-width: 600px) {
  .line-documentation {
    --line-column: 1.5rem;
    margin-top: 3.5rem;
  }

  .line-introduction {
    margin-bottom: 2rem;
  }

  .line-chapter {
    gap: 0 0.75rem;
    margin-top: 3.5rem;
    margin-bottom: 2rem;
  }

  .line-chapter-copy h2 {
    margin-bottom: 1.15rem;
  }

  .line-photo-pair {
    gap: 0.75rem;
  }

  .line-agent-roles > div {
    grid-template-columns: 1fr;
  }

  .line-source-figure {
    padding: 0.75rem;
  }

  .line-organisation,
  .line-script-excerpt {
    margin-left: 0;
    margin-bottom: 2.5rem;
  }

  .line-call-flow {
    margin-left: calc(var(--line-column) + 0.75rem);
    margin-bottom: 2.5rem;
  }

  .line-call-flow ol {
    grid-template-columns: 1fr;
  }

  .line-call-flow li {
    gap: 0.15rem;
    padding: 0 0 1.5rem;
  }

  .line-call-flow li:last-child {
    padding-bottom: 0;
  }

  .line-interlude {
    width: auto;
    margin: 2.5rem 0 2.5rem calc(var(--line-column) + 0.75rem);
  }

  .line-equipment-pair {
    column-gap: 1.5rem;
  }

  .line-tariff-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .line-tariff-layout .line-photo {
    width: 78%;
    margin: 0 0 0 auto;
  }

  .line-documentation > .line-chapter:last-child {
    margin-bottom: 3rem;
  }

  .line-credits {
    margin: 3rem 0 3rem calc(var(--line-column) + 0.75rem);
  }

  .line-credit-list > div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (max-width: 380px) {
  .line-photo-pair {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}