.about-page {
  min-height: 100%;
  overflow: hidden;
}

.about-header-label {
  margin-left: auto;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.about-header-link {
  display: inline-flex;
  min-height: 44px;
  padding: 0 4px;
  color: var(--muted);
  align-items: center;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.about-header-link:hover {
  color: var(--ink);
}

.about-shell {
  min-height: 0;
  padding: clamp(34px, 6vw, 82px) clamp(18px, 5vw, 72px) 80px;
  overflow-y: auto;
  flex: 1 1 auto;
  scroll-behavior: smooth;
}

.about-document {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.about-intro {
  display: grid;
  padding-bottom: clamp(34px, 5vw, 64px);
  border-bottom: 1px solid var(--line-strong);
  grid-template-columns: minmax(0, 760px);
}

.about-kicker,
.manual-section-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.about-intro h1 {
  margin: 0;
  color: var(--ink);
  font-size: 64px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 0.95;
}

.about-lede {
  max-width: 700px;
  margin: 24px 0 0;
  color: color-mix(in oklab, var(--ink) 88%, var(--muted));
  font-size: 16px;
  line-height: 1.7;
}

.manual-section {
  display: grid;
  padding: clamp(38px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--line-strong);
  grid-template-columns: minmax(180px, 0.34fr) minmax(0, 1fr);
  gap: clamp(26px, 6vw, 78px);
  scroll-margin-top: 24px;
}

.manual-section-heading {
  align-self: start;
}

.manual-section h2 {
  margin: 0;
  color: var(--ink);
  font-size: 27px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.15;
}

.catalogue-manual-section {
  display: block;
}

.catalogue-manual-section .manual-section-heading {
  max-width: 760px;
}

.catalogue-operation {
  max-width: 62ch;
  margin: 12px 0 0;
  color: color-mix(in oklab, var(--ink) 77%, var(--muted));
  font-size: 12px;
  line-height: 1.6;
}

.manual-section-note {
  max-width: 270px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.manual-copy {
  min-width: 0;
}

.manual-copy > :first-child {
  margin-top: 0;
}

.manual-copy > :last-child {
  margin-bottom: 0;
}

.manual-copy p,
.manual-copy li {
  max-width: 78ch;
  color: color-mix(in oklab, var(--ink) 77%, var(--muted));
  font-size: 12px;
  line-height: 1.75;
}

.manual-copy ol,
.manual-copy ul {
  padding-left: 20px;
  margin: 18px 0;
}

.manual-copy li + li {
  margin-top: 10px;
}

.manual-copy a,
.page-entry h3 a {
  color: var(--accent);
  text-decoration-color: color-mix(in oklab, var(--accent) 45%, transparent);
  text-underline-offset: 3px;
}

.manual-copy a:hover,
.page-entry h3 a:hover {
  text-decoration-color: currentColor;
}

.page-list {
  display: grid;
  border-top: 1px solid var(--line-strong);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-entry {
  min-width: 0;
  padding: 22px 20px 24px 0;
  border-bottom: 1px solid var(--line);
}

.page-entry:nth-child(odd) {
  padding-right: 28px;
  border-right: 1px solid var(--line);
}

.page-entry:nth-child(even) {
  padding-left: 28px;
}

.page-entry h3 {
  margin: 0 0 9px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.035em;
  line-height: 1.4;
}

.page-entry p {
  margin: 0;
  color: color-mix(in oklab, var(--ink) 72%, var(--muted));
  font-size: 11px;
  line-height: 1.7;
}

.technical-list {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.technical-list div {
  display: grid;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(110px, 0.28fr) minmax(0, 1fr);
  gap: 24px;
}

.technical-list dt,
.technical-list dd {
  margin: 0;
}

.technical-list dt {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.technical-list dd {
  max-width: 72ch;
  color: color-mix(in oklab, var(--ink) 78%, var(--muted));
  font-size: 11px;
  line-height: 1.7;
}

.about-footer {
  display: flex;
  padding-top: 28px;
  color: var(--muted);
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.about-footer-credit {
  max-width: 620px;
  letter-spacing: 0;
  line-height: 1.6;
  text-align: center;
  text-transform: none;
}

@media (max-width: 760px) {
  .about-header-label {
    display: none;
  }

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

  .about-intro h1 {
    font-size: 46px;
  }

  .manual-section-note {
    max-width: 62ch;
  }
}

@media (max-width: 560px) {
  .about-shell {
    padding-top: 28px;
    padding-bottom: 50px;
  }

  .about-intro h1 {
    font-size: 36px;
  }

  .manual-section h2 {
    font-size: 22px;
  }

  .page-list {
    grid-template-columns: 1fr;
  }

  .page-entry,
  .page-entry:nth-child(odd),
  .page-entry:nth-child(even) {
    padding: 19px 0 21px;
    border-right: 0;
  }

  .technical-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .about-footer {
    flex-direction: column;
    gap: 8px;
  }
}