.page-about {
  --axis-w: 52px;
  --about-rule: 1px solid var(--line-soft);
  --about-muted: rgba(30, 26, 22, 0.7);
  --about-faint: rgba(30, 26, 22, 0.14);
  padding-bottom: 64px;
  color: var(--brown-900);
  background: var(--paper-100);
}

.page-about .container {
  padding-top: 24px;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about figure {
  margin: 0;
}

.page-about figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--about-muted);
}

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

.page-about .about-masthead {
  display: grid;
  gap: 18px 40px;
  padding: 14px 0 34px;
  border-bottom: var(--about-rule);
  grid-template-areas:
    "eyebrow"
    "title"
    "lede"
    "lede2"
    "marks";
}

.page-about .about-masthead .eyebrow {
  grid-area: eyebrow;
}

.page-about .about-masthead h1 {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(36px, 8.4vw, 76px);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--ink-950);
}

.page-about .masthead-lede {
  grid-area: lede;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--brown-900);
  max-width: 62ch;
}

.page-about .masthead-lede--sub {
  grid-area: lede2;
  color: var(--about-muted);
}

.page-about .about-marks {
  grid-area: marks;
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-faint);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .about-mark {
  display: grid;
  gap: 4px;
  padding: 15px 4px 15px 0;
  background: var(--paper-100);
}

.page-about .mark-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 34px);
  font-weight: 500;
  line-height: 1;
  color: var(--brass-500);
  letter-spacing: -0.02em;
}

.page-about .mark-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-muted);
}

/* ---------- generic band ---------- */

.page-about .about-band {
  padding: 40px 0 38px;
  border-bottom: var(--about-rule);
}

.page-about .band-head {
  display: grid;
  gap: 10px;
}

.page-about .about-band h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(27px, 5.4vw, 44px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--ink-950);
}

.page-about .band-lede {
  margin: 4px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--brown-900);
  max-width: 68ch;
}

.page-about .band-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--about-muted);
  border-left: 2px solid var(--brass-line);
  padding-left: 12px;
}

/* ---------- origin ---------- */

.page-about .origin-grid {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-about .origin-copy p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.82;
}

.page-about .origin-copy p:last-child {
  margin-bottom: 0;
}

.page-about .origin-figure {
  position: relative;
}

.page-about .origin-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.02);
  border: 1px solid var(--about-faint);
}

/* ---------- axis ---------- */

.page-about .about-axis {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: var(--axis-w);
  top: 28px;
  bottom: 28px;
  width: 1px;
  background: linear-gradient(180deg, var(--brass-500), rgba(183, 123, 63, 0.12));
}

.page-about .axis-item {
  position: relative;
}

.page-about .axis-details {
  position: relative;
}

.page-about .axis-details > summary {
  position: relative;
  display: grid;
  grid-template-columns: var(--axis-w) minmax(0, 1fr);
  align-items: baseline;
  gap: 0;
  padding: 16px 30px 16px 0;
  cursor: pointer;
  list-style: none;
  border-top: var(--about-rule);
  transition: background var(--dur) var(--ease);
}

.page-about .axis-details > summary::-webkit-details-marker {
  display: none;
}

.page-about .axis-details > summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--brass-500);
}

.page-about .axis-details[open] > summary::after {
  content: "−";
}

.page-about .axis-details > summary:hover,
.page-about .axis-details > summary:focus-visible {
  background: rgba(183, 123, 63, 0.07);
  outline: none;
}

.page-about .axis-details > summary:focus-visible {
  box-shadow: inset 0 0 0 2px var(--brass-500);
}

.page-about .axis-year {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--brass-500);
  text-align: right;
  padding-right: 18px;
}

.page-about .axis-label {
  padding-left: 18px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-950);
  line-height: 1.35;
}

.page-about .axis-marker {
  position: absolute;
  left: calc(var(--axis-w) - 4.5px);
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper-100);
  border: 1.5px solid var(--brass-500);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .axis-details[open] .axis-marker {
  background: var(--celadon-500);
  border-color: var(--celadon-500);
  transform: scale(1.18);
}

.page-about .axis-body {
  padding: 0 0 18px calc(var(--axis-w) + 18px);
}

.page-about .axis-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--brown-900);
  max-width: 60ch;
}

.page-about .axis-figure {
  margin-top: 26px;
}

.page-about .axis-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.8);
  border: 1px solid var(--about-faint);
}

/* ---------- network ---------- */

.page-about .net-diagram {
  margin-top: 24px;
  padding: 20px;
  background: var(--ink-950);
  color: var(--mist-000);
  border-radius: 2px;
  display: grid;
  gap: 16px;
  position: relative;
  overflow: hidden;
}

.page-about .net-diagram::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -70px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(183, 123, 63, 0.28), transparent 68%);
  pointer-events: none;
}

.page-about .net-core {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 5px;
  padding: 16px 18px;
  border: 1px solid var(--brass-line);
  background: linear-gradient(160deg, rgba(183, 123, 63, 0.16), rgba(18, 44, 67, 0.5));
}

.page-about .net-core-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--brass-300);
}

.page-about .net-core-name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--mist-000);
}

.page-about .net-core-desc {
  font-size: 12.5px;
  color: var(--mist-text);
}

.page-about .net-ring {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
}

.page-about .net-node {
  display: grid;
  gap: 3px;
  padding: 12px 12px 13px;
  border: 1px solid var(--line-dark);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .net-node:hover,
.page-about .net-node:focus-within {
  border-color: var(--brass-300);
  background: rgba(183, 123, 63, 0.14);
  transform: translateY(-2px);
}

.page-about .net-node-name {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--mist-000);
}

.page-about .net-node-desc {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--mist-text);
}

.page-about .net-node--support .net-node-name {
  color: var(--celadon-200);
}

.page-about .net-footnote {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--about-muted);
}

/* ---------- team ---------- */

.page-about .team-grid {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}

.page-about .team-copy p {
  margin: 0 0 15px;
  font-size: 15.5px;
  line-height: 1.82;
}

.page-about .team-copy p:last-child {
  margin-bottom: 0;
}

.page-about .team-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.78);
  border: 1px solid var(--about-faint);
}

.page-about .team-lines {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-faint);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .team-line {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 14px 2px;
  background: var(--paper-100);
  align-items: baseline;
}

.page-about .team-line-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--brass-500);
}

.page-about .team-line-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-950);
}

.page-about .team-line-desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-muted);
}

/* ---------- feedback ---------- */

.page-about .feedback-list {
  margin: 22px 0 0;
  display: grid;
  gap: 0;
}

.page-about .feedback-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 14px 2px;
  border-top: var(--about-rule);
}

.page-about .feedback-row:last-child {
  border-bottom: var(--about-rule);
}

.page-about .feedback-row dt {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--about-muted);
}

.page-about .feedback-row dd {
  margin: 0;
  text-align: right;
  white-space: nowrap;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5.6vw, 32px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--brass-500);
}

.page-about .stat-unit {
  margin-left: 5px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--about-muted);
}

.page-about .feedback-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

/* ---------- cta ---------- */

.page-about .about-cta {
  margin-top: 40px;
  padding: 30px 20px 34px;
  background: var(--ink-950);
  color: var(--mist-000);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--brass-500), transparent);
}

.page-about .section-num--light {
  color: var(--brass-300);
}

.page-about .about-cta h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 5.6vw, 42px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--mist-000);
}

.page-about .cta-lede {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-text);
  max-width: 52ch;
}

.page-about .cta-links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .cta-links a {
  display: block;
  padding: 13px 14px;
  border: 1px solid var(--line-dark);
  font-size: 14.5px;
  color: var(--mist-000);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .cta-links a:hover,
.page-about .cta-links a:focus-visible {
  border-color: var(--brass-300);
  background: rgba(183, 123, 63, 0.18);
  color: var(--brass-300);
  outline: none;
}

.page-about .cta-contact {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .cta-mail {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--celadon-200);
  text-decoration: none;
  border-bottom: 1px solid rgba(174, 200, 187, 0.4);
  word-break: break-all;
}

.page-about .cta-mail:hover,
.page-about .cta-mail:focus-visible {
  color: var(--mist-000);
  border-bottom-color: var(--brass-300);
}

.page-about .about-cta .copy-state {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--celadon-200);
}

/* ---------- responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-mark {
    padding: 16px 14px 16px 0;
  }

  .page-about .band-head--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: end;
    gap: 8px 32px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --axis-w: 96px;
  }

  .page-about .container {
    padding-top: 32px;
  }

  .page-about .about-masthead {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    grid-template-areas:
      "eyebrow eyebrow"
      "title   lede"
      "title   lede2"
      "marks   marks";
    column-gap: 56px;
    row-gap: 20px;
    align-items: start;
    padding: 18px 0 40px;
  }

  .page-about .about-masthead h1 {
    max-width: 15ch;
  }

  .page-about .masthead-lede {
    padding-top: 10px;
  }

  .page-about .about-marks {
    margin-top: 14px;
  }

  .page-about .about-band {
    padding: 52px 0 48px;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    gap: 44px;
    align-items: start;
    margin-top: 28px;
  }

  .page-about .origin-figure {
    margin-top: 4px;
  }

  .page-about .axis-label {
    font-size: 21px;
  }

  .page-about .axis-year {
    font-size: 19px;
    padding-right: 26px;
  }

  .page-about .axis-body {
    padding-left: calc(var(--axis-w) + 26px);
  }

  .page-about .axis-figure {
    margin-top: 34px;
  }

  .page-about .net-diagram {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.9fr);
    gap: 18px;
    padding: 24px;
    align-items: start;
  }

  .page-about .net-core {
    padding: 22px 20px;
    height: 100%;
    align-content: center;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 40px;
    align-items: start;
    margin-top: 26px;
  }

  .page-about .team-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .feedback-list {
    margin-top: 26px;
  }

  .page-about .about-cta {
    margin-top: 52px;
    padding: 42px 40px 46px;
  }
}

@media (min-width: 1180px) {
  .page-about .team-lines {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-line {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px 16px 18px 0;
  }

  .page-about .team-line-num {
    grid-row: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .axis-marker,
  .page-about .net-node,
  .page-about .cta-links a,
  .page-about .axis-details > summary {
    transition: none;
  }

  .page-about .net-node:hover,
  .page-about .net-node:focus-within {
    transform: none;
  }
}