.page-about {
  --about-rail-w: 200px;
  --about-gap: clamp(64px, 9vw, 132px);
  --about-edge: rgba(183, 196, 212, .22);
  --about-sun: rgba(255, 155, 69, .16);
}

/* ---------- HERO ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 11vw, 140px) 0 clamp(56px, 8vw, 104px);
  background:
    radial-gradient(120% 80% at 88% 8%, rgba(53, 232, 210, .12), transparent 58%),
    linear-gradient(180deg, var(--deep-900) 0%, var(--ink-950) 100%);
}

.page-about .about-hero__ticks {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: rgba(183, 196, 212, .09);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__crumb a,
.page-about .about-hero__crumb li {
  color: var(--mist-300);
}

.page-about .about-hero__crumb a:hover {
  color: var(--cyan-400);
}

.page-about .about-hero__eyebrow {
  color: var(--cyan-400);
  letter-spacing: .22em;
  margin: 0 0 20px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 8.4vw, 6.2rem);
  line-height: .98;
  letter-spacing: -.01em;
  font-weight: 800;
  color: var(--paper-50);
  margin: 0 0 clamp(24px, 3.5vw, 40px);
  max-width: 15ch;
}

.page-about .about-hero__lead {
  color: var(--mist-300);
  max-width: 62ch;
  margin: 0 0 clamp(44px, 6vw, 76px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-edge);
  border: 1px solid var(--about-edge);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 0;
}

.page-about .about-hero__grid .data-grid__cell {
  background: rgba(10, 27, 46, .72);
  padding: clamp(18px, 2.4vw, 28px);
}

.page-about .about-hero__grid .data-grid__label {
  color: var(--stone-500);
  font-size: .76rem;
  letter-spacing: .12em;
  margin-bottom: 10px;
}

.page-about .about-hero__grid .data-grid__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  color: var(--cyan-400);
  line-height: 1;
}

/* ---------- DOSSIER SHELL ---------- */

.page-about .about-dossier {
  padding: clamp(56px, 8vw, 108px) 0 clamp(72px, 10vw, 140px);
}

.page-about .about-dossier__inner {
  display: block;
}

/* ---------- RAIL ---------- */

.page-about .about-rail {
  margin-bottom: clamp(36px, 6vw, 0px);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  border-left: 0;
  min-width: max-content;
}

.page-about .about-node {
  flex: 0 0 auto;
}

.page-about .about-node a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--paper-100);
  border-radius: var(--radius-pill);
  background: rgba(245, 240, 230, .6);
  color: var(--ink-on-paper);
  text-decoration: none;
  font-size: .86rem;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-node a:hover,
.page-about .about-node a:focus-visible {
  border-color: var(--cyan-700);
  background: var(--paper-50);
  color: var(--cyan-700);
}

.page-about .about-node__num {
  color: var(--orange-500);
  font-size: .78rem;
}

/* ---------- CHAPTERS ---------- */

.page-about .chapter {
  padding-top: var(--about-gap);
}

.page-about .about-doc > .chapter:first-child {
  padding-top: 0;
}

.page-about .chapter__head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .chapter__num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(3.6rem, 11vw, 7.4rem);
  line-height: .82;
  font-weight: 800;
  color: rgba(14, 142, 133, .2);
  letter-spacing: -.02em;
  margin-bottom: 8px;
}

.page-about .chapter__title {
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink-950);
  margin: 0;
  max-width: 22ch;
}

.page-about .chapter__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  color: #4a5766;
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .chapter__text p {
  color: var(--ink-on-paper);
  margin: 0 0 1.4em;
}

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

.page-about .chapter__cta {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .chapter__cta a {
  color: var(--cyan-700);
  font-weight: 600;
}

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

/* ---------- FIGURES ---------- */

.page-about .about-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .media-frame img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-night {
  margin: clamp(56px, 8vw, 104px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ---------- PROCESS ---------- */

.page-about .process {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .process__figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .process__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--paper-100);
  border: 1px solid var(--paper-100);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .process__step {
  background: var(--paper-50);
  padding: clamp(20px, 2.6vw, 28px);
  transition: background-color 200ms var(--ease);
}

.page-about .process__step:hover {
  background: #fff;
}

.page-about .process__step-num {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--orange-500);
  margin-bottom: 10px;
}

.page-about .process__step-title {
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  font-weight: 700;
  color: var(--ink-950);
  margin: 0 0 10px;
  letter-spacing: -.005em;
}

.page-about .process__step p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: #4a5766;
}

/* ---------- CHRONO BAND ---------- */

.page-about .chrono-scroll {
  margin-top: var(--about-gap);
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 10px;
  -webkit-overflow-scrolling: touch;
}

.page-about .chrono {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 40px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(190px, 1fr));
  gap: 20px;
  min-width: 780px;
}

.page-about .chrono::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 6px;
  right: 6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange-500) 0%, var(--cyan-400) 100%);
}

.page-about .chrono__node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .chrono__dot {
  position: absolute;
  top: -34px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper-50);
  border: 3px solid var(--orange-500);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .chrono__node:nth-child(3) .chrono__dot,
.page-about .chrono__node:nth-child(4) .chrono__dot {
  border-color: var(--cyan-400);
}

.page-about .chrono__node:hover .chrono__dot {
  transform: scale(1.15);
  border-color: var(--cyan-700);
}

.page-about .chrono__stamp {
  font-size: .72rem;
  letter-spacing: .16em;
}

.page-about .chrono__title {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.8vw, 1.22rem);
  font-weight: 700;
  color: var(--ink-950);
  line-height: 1.24;
}

.page-about .chrono__meta {
  font-size: .74rem;
  color: var(--stone-500);
}

/* ---------- AXIS LIST ---------- */

.page-about .axis-list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--paper-100);
}

.page-about .axis-list__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--paper-100);
}

.page-about .axis-list__key {
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--cyan-700);
}

.page-about .axis-list__desc {
  margin: 0;
  color: var(--ink-on-paper);
  font-size: .95rem;
  line-height: 1.8;
}

/* ---------- TEAM ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .team-card {
  background: var(--paper-50);
  border: 1px solid var(--paper-100);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .team-card:hover {
  border-color: rgba(14, 142, 133, .38);
  transform: translateY(-2px);
}

.page-about .team-card__summary {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "count role"
    "hint hint";
  align-items: center;
  gap: 6px 16px;
  padding: clamp(18px, 2.4vw, 24px);
  cursor: pointer;
  list-style: none;
}

.page-about .team-card__summary::-webkit-details-marker {
  display: none;
}

.page-about .team-card__count {
  grid-area: count;
  font-size: 1rem;
  color: var(--orange-500);
  letter-spacing: .06em;
}

.page-about .team-card__role {
  grid-area: role;
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 700;
  color: var(--ink-950);
  margin: 0;
}

.page-about .team-card__hint {
  grid-area: hint;
  font-size: .78rem;
  color: var(--stone-500);
  letter-spacing: .08em;
}

.page-about .team-card[open] .team-card__hint {
  color: var(--cyan-700);
}

.page-about .team-card__body {
  padding: 0 clamp(18px, 2.4vw, 24px) clamp(20px, 2.6vw, 26px);
}

.page-about .team-card__body p {
  margin: 0 0 1em;
  color: #4a5766;
  font-size: .95rem;
  line-height: 1.8;
}

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

/* ---------- STANDARDS ---------- */

.page-about .about-standards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--paper-100);
  border: 1px solid var(--paper-100);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 0;
}

.page-about .about-standards .data-grid__cell {
  background: var(--paper-50);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-standards .data-grid__label {
  color: var(--stone-500);
  font-size: .76rem;
  letter-spacing: .12em;
  margin-bottom: 10px;
}

.page-about .about-standards .data-grid__value {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  color: var(--ink-950);
  line-height: 1.15;
  margin-bottom: 6px;
}

.page-about .about-standards .data-grid__note {
  margin: 0;
  font-size: .82rem;
  color: var(--stone-500);
  line-height: 1.6;
}

/* ---------- COOP ---------- */

.page-about .coop-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
}

/* ---------- RESPONSIVE ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .axis-list__item {
    grid-template-columns: 120px 1fr;
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .chapter__grid {
    grid-template-columns: 8fr 4fr;
    align-items: start;
  }

  .page-about .about-figure {
    position: sticky;
    top: 110px;
  }

  .page-about .process {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .process__figure {
    position: sticky;
    top: 110px;
  }

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

  .page-about .about-standards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-card__summary {
    grid-template-areas:
      "count"
      "role"
      "hint";
    gap: 8px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-dossier__inner {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 9fr);
    gap: clamp(40px, 5vw, 80px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 110px;
    margin-bottom: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-timeline {
    display: block;
    min-width: 0;
    border-left: 1px solid var(--paper-100);
    padding-left: 22px;
  }

  .page-about .about-node {
    position: relative;
    margin-bottom: 4px;
  }

  .page-about .about-node::before {
    content: "";
    position: absolute;
    left: -28px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--paper-100);
    transition: background-color 200ms var(--ease), transform 200ms var(--ease);
  }

  .page-about .about-node:hover::before {
    background: var(--cyan-400);
    transform: translateY(-50%) scale(1.15);
  }

  .page-about .about-node a {
    border-color: transparent;
    background: transparent;
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    color: var(--stone-500);
  }

  .page-about .about-node a:hover,
  .page-about .about-node a:focus-visible {
    border-color: transparent;
    background: var(--paper-100);
    color: var(--ink-950);
  }
}

@media (min-width: 1240px) {
  .page-about .chapter__grid {
    grid-template-columns: 7fr 5fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .chrono__dot,
  .page-about .about-node::before,
  .page-about .about-node a,
  .page-about .process__step {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }

  .page-about .chrono__node:hover .chrono__dot {
    transform: none;
  }
}