.page-about {
  background: var(--ink-900);
  color: var(--text-on-dark);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: calc(var(--header-h) + 56px) 80px;
  background:
    radial-gradient(110% 80% at 88% -10%, rgba(47, 210, 168, .10), transparent 60%),
    radial-gradient(90% 70% at -5% 110%, rgba(255, 106, 31, .13), transparent 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 34px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--text-dim);
}

.page-about .about-hero__crumbs a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .about-hero__crumbs a:hover,
.page-about .about-hero__crumbs a:focus-visible {
  color: var(--flame-300);
}

.page-about .about-hero__crumbs [aria-current="page"] {
  color: var(--text-on-dark);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: end;
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--flame-500);
  font-family: var(--font-mono);
  letter-spacing: .1em;
}

.page-about .about-hero__title {
  font-size: clamp(38px, 6vw, 78px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: #fff;
  max-width: 12em;
}

.page-about .about-hero__lede {
  margin-top: 26px;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 44px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line-faint);
}

.page-about .about-fact dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.page-about .about-fact dd {
  margin-top: 8px;
  font-size: 30px;
  line-height: 1;
  color: var(--text-on-dark);
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(260px, 46vw, 520px);
  object-fit: cover;
}

.page-about .about-hero__figure figcaption {
  padding: 14px 20px 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  border-top: 1px solid var(--line-faint);
}

/* ---------- Chapter scaffold ---------- */
.page-about .about-chapter {
  padding-block: 76px;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(78px, 14vw, 150px);
  line-height: .78;
  letter-spacing: -.05em;
  color: rgba(234, 241, 248, .09);
  margin-bottom: -.16em;
  user-select: none;
}

.page-about .about-chapter__num--dark {
  color: rgba(10, 26, 42, .08);
}

.page-about .about-chapter__title {
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: #fff;
}

.page-about .about-chapter__title--dark {
  color: var(--ink-text);
}

.page-about .about-chapter__body {
  min-width: 0;
}

.page-about .about-chapter__body p {
  max-width: 40em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-chapter__body p + p {
  margin-top: 1.15em;
}

.page-about .about-chapter__note {
  margin-top: 30px;
  padding-left: 18px;
  border-left: 2px solid var(--line);
}

.page-about .link-inline {
  color: var(--flame-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 161, 103, .45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .link-inline:hover,
.page-about .link-inline:focus-visible {
  color: var(--flame-500);
  border-color: var(--flame-500);
}

.page-about .link-inline--dark {
  color: var(--jade-700);
  border-bottom-color: rgba(21, 135, 106, .4);
}

.page-about .link-inline--dark:hover,
.page-about .link-inline--dark:focus-visible {
  color: var(--flame-500);
  border-color: var(--flame-500);
}

/* ---------- Role bars ---------- */
.page-about .about-roles {
  display: grid;
  gap: 22px;
  margin-top: 34px;
  padding: 26px 22px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(18, 48, 74, .9), rgba(10, 26, 42, .55));
}

.page-about .about-role__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 10px;
}

.page-about .about-role__name {
  font-size: 15px;
  color: var(--text-on-dark);
}

.page-about .about-role__num {
  font-size: 18px;
  color: var(--jade-500);
}

.page-about .about-role__track {
  height: 6px;
  border-radius: var(--radius-pill);
  background: rgba(30, 74, 110, .45);
  overflow: hidden;
}

.page-about .about-role__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--jade-700), var(--jade-500));
  transition: width 900ms var(--ease);
}

.page-about .about-role--editors .about-role__fill { width: 35.5%; }
.page-about .about-role--refs .about-role__fill { width: 14.5%; }
.page-about .about-role--tech .about-role__fill { width: 33.9%; }

/* ---------- Method ---------- */
.page-about .about-method__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

.page-about .about-method__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-about .about-method__figure img {
  display: block;
  width: 100%;
  height: clamp(220px, 44vw, 420px);
  object-fit: cover;
}

.page-about .about-method__figure figcaption {
  padding: 12px 18px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  border-top: 1px solid var(--line-faint);
}

/* ---------- Version timeline ---------- */
.page-about .about-version__banner {
  margin: 0 0 30px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-about .about-version__banner img {
  display: block;
  width: 100%;
  height: clamp(180px, 32vw, 340px);
  object-fit: cover;
}

.page-about .about-version__banner figcaption {
  padding: 12px 20px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  border-top: 1px solid var(--line-faint);
}

.page-about .about-version__lede {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-on-dark);
}

.page-about .about-timeline {
  position: relative;
  margin-top: 34px;
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__node {
  position: relative;
  padding-bottom: 34px;
  outline: none;
}

.page-about .about-timeline__node:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -32px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--line);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__node:hover .about-timeline__dot,
.page-about .about-timeline__node:focus-visible .about-timeline__dot {
  background: var(--flame-300);
  border-color: var(--flame-300);
}

.page-about .about-timeline__node.is-current .about-timeline__dot {
  background: var(--flame-500);
  border-color: var(--flame-500);
  box-shadow: 0 0 0 6px rgba(255, 106, 31, .16);
}

.page-about .about-timeline__era {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--jade-500);
}

.page-about .about-timeline__name {
  margin-top: 8px;
  font-size: 20px;
  font-weight: 900;
  line-height: 1.3;
  color: #fff;
}

.page-about .about-timeline__desc {
  margin-top: 10px;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-timeline__keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  list-style: none;
  padding: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 320ms var(--ease), opacity 240ms var(--ease);
}

.page-about .about-timeline__keys li {
  padding: 5px 12px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-dim);
  white-space: nowrap;
}

.page-about .about-timeline__node:hover .about-timeline__keys,
.page-about .about-timeline__node:focus-visible .about-timeline__keys,
.page-about .about-timeline__node.is-current .about-timeline__keys {
  max-height: 120px;
  opacity: 1;
}

.page-about .about-timeline__node:hover .about-timeline__keys li,
.page-about .about-timeline__node:focus-visible .about-timeline__keys li {
  border-color: rgba(255, 161, 103, .5);
  color: var(--flame-300);
}

/* ---------- Ecosystem ---------- */
.page-about .about-eco {
  background: var(--mist);
  color: var(--ink-text);
  border-top: 1px solid var(--mist-line);
  border-bottom: 1px solid var(--mist-line);
}

.page-about .about-eco__head {
  max-width: 46em;
}

.page-about .about-eco__lede {
  margin-top: 20px;
  font-size: 17px;
  line-height: 1.85;
  color: #34424f;
}

.page-about .about-eco__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 44px;
}

.page-about .about-eco__card {
  padding: 26px 24px 28px;
  border: 1px solid var(--mist-line);
  border-radius: var(--radius-lg);
  background: #fff;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-eco__card:hover {
  border-color: var(--flame-300);
  transform: translateY(-3px);
}

.page-about .about-eco__index {
  font-size: 22px;
  color: var(--jade-700);
}

.page-about .about-eco__name {
  margin-top: 12px;
  font-size: 20px;
  font-weight: 900;
  color: var(--ink-text);
}

.page-about .about-eco__card p:not(.about-eco__index) {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: #46545f;
}

/* ---------- Pledge ---------- */
.page-about .about-pledge {
  padding-block: 76px 96px;
  background:
    radial-gradient(80% 90% at 100% 0%, rgba(255, 106, 31, .14), transparent 58%),
    var(--ink-900);
}

.page-about .about-pledge__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
}

.page-about .about-pledge__title {
  margin-top: 18px;
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: #fff;
}

.page-about .about-pledge__copy p:not(.eyebrow) {
  margin-top: 22px;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-pledge__aside {
  display: grid;
  gap: 12px;
  padding: 26px 22px;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(18, 48, 74, .92), rgba(10, 26, 42, .6));
}

.page-about .about-pledge__meta {
  margin-top: 6px;
  text-align: center;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--text-dim);
}

/* ---------- Responsive ---------- */
@media (min-width: 760px) {
  .page-about .about-chapter {
    padding-block: 96px;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(200px, 4fr) minmax(0, 8fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-chapter__head {
    position: sticky;
    top: calc(var(--header-h-compact) + 32px);
  }

  .page-about .about-method__split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    gap: 34px;
  }

  .page-about .about-eco__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-eco__card--wide {
    grid-column: 1 / -1;
  }

  .page-about .about-pledge__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .8fr);
    gap: 56px;
  }

  .page-about .about-pledge__aside {
    position: sticky;
    top: calc(var(--header-h-compact) + 32px);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 60px;
  }

  .page-about .about-timeline {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    gap: 0;
    padding: 44px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .page-about .about-timeline__node {
    padding: 0 22px 8px 0;
    scroll-snap-align: start;
  }

  .page-about .about-timeline__node:last-child {
    padding-right: 0;
  }

  .page-about .about-timeline__dot {
    left: 0;
    top: -44px;
    transform: translateY(-50%);
  }

  .page-about .about-timeline__keys {
    max-height: 120px;
    opacity: .62;
  }
}

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

  .page-about .about-eco__card--wide {
    grid-column: span 2;
  }
}

@media (max-width: 480px) {
  .page-about .about-hero__facts {
    gap: 18px 30px;
  }

  .page-about .about-fact dd {
    font-size: 26px;
  }

  .page-about .about-roles {
    padding: 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role__fill,
  .page-about .about-timeline__keys,
  .page-about .about-timeline__dot,
  .page-about .about-eco__card {
    transition: none;
  }

  .page-about .about-eco__card:hover {
    transform: none;
  }
}