.page-about {
  --about-gap: clamp(20px, 3vw, 34px);
  --about-hang: clamp(3.4rem, 8vw, 6rem);
  position: relative;
  padding-bottom: clamp(48px, 8vw, 112px);
  background:
    radial-gradient(1100px 520px at 84% -6%, rgba(51, 178, 124, 0.10), transparent 62%),
    radial-gradient(820px 460px at 6% 26%, rgba(255, 122, 47, 0.055), transparent 66%);
  color: var(--paper);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3vw, 34px) 0 clamp(34px, 5vw, 58px);
}

.page-about .about-hero::after {
  content: "";
  display: block;
  margin-top: clamp(28px, 4vw, 46px);
  height: 3px;
  background: linear-gradient(90deg, var(--grass) 0%, var(--score) 44%, transparent 100%);
  opacity: 0.55;
}

.page-about .about-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-hero__kicker span + span::before {
  content: "·";
  margin-right: 22px;
  color: var(--line);
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 8.6vw, 6.2rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 18ch;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--grass);
  position: relative;
}

.page-about .about-hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.08em;
  height: 2px;
  background: linear-gradient(90deg, var(--grass), transparent);
}

.page-about .about-hero__lower {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.3vw, 1.0625rem);
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.9;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stat {
  background: var(--panel);
  padding: 14px 16px 16px;
}

.page-about .about-hero__stat dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-about .about-hero__stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-hero__digit {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--sprout);
  letter-spacing: -0.02em;
}

.page-about .about-hero__digit.num--score {
  color: var(--score);
}

.page-about .about-hero__unit {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--muted);
}

.page-about .about-shell {
  display: grid;
  gap: clamp(40px, 5vw, 56px);
  margin-top: clamp(8px, 2vw, 18px);
}

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

/* ---------- chapter ---------- */

.page-about .about-chapter {
  position: relative;
  padding: clamp(38px, 5.4vw, 66px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapter:last-of-type {
  border-bottom: 0;
}

.page-about .chapter__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.6rem, 7vw, 3.6rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--line);
  transition: color 220ms var(--ease);
}

.page-about .about-chapter[data-active] .chapter__num {
  color: var(--grass);
}

.page-about .chapter__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .lead {
  margin: 0 0 clamp(22px, 3.2vw, 34px);
  max-width: 62ch;
  color: var(--paper);
  opacity: 0.88;
  line-height: 1.68;
}

.page-about .muted {
  color: var(--muted);
}

.page-about .quote {
  margin: clamp(18px, 2.4vw, 26px) 0;
  padding: 6px 0 6px 18px;
  border-left: 3px solid var(--grass);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-note {
  margin: clamp(20px, 2.8vw, 30px) 0 0;
  max-width: 62ch;
  line-height: 1.68;
}

/* ---------- split layout ---------- */

.page-about .about-split {
  display: grid;
  gap: clamp(22px, 3.2vw, 38px);
  align-items: start;
}

.page-about .about-split__fig {
  margin: 0;
}

.page-about .about-split__fig--wide {
  aspect-ratio: 3 / 2;
}

.page-about .about-split__body p {
  margin: 0 0 1.1em;
  max-width: 62ch;
  line-height: 1.72;
}

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

/* ---------- timeline ---------- */

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .phase {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .phase:hover,
.page-about .phase[open] {
  border-color: var(--grass);
  transform: translateY(-2px);
}

.page-about .phase__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .phase__summary:focus-visible {
  outline: 2px solid var(--score);
  outline-offset: -2px;
}

.page-about .phase__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--grass);
  flex: 0 0 auto;
}

.page-about .phase__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.02rem, 1.8vw, 1.28rem);
  line-height: 1.2;
  color: var(--paper);
  flex: 1 1 auto;
}

.page-about .phase__meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  flex: 0 0 auto;
  white-space: nowrap;
}

.page-about .phase__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
  margin-top: 0;
}

.page-about .phase__body p {
  margin: 14px 0 0;
  line-height: 1.7;
  color: var(--paper);
  opacity: 0.88;
}

.page-about .phase__facts {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .phase__facts li {
  position: relative;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.94rem;
}

.page-about .phase__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--sprout);
}

/* ---------- flowline ---------- */

.page-about .flowline {
  position: relative;
  margin: 0 0 clamp(26px, 3.6vw, 40px);
}

.page-about .flowline__deco {
  display: none;
}

.page-about .flowline__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  counter-reset: none;
}

.page-about .flowline__step {
  position: relative;
  padding: 16px 18px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .flowline__step:hover,
.page-about .flowline__step:focus-within {
  border-color: var(--grass);
  transform: translateY(-2px);
}

.page-about .flowline__dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border: 1px solid var(--grass);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--sprout);
  background: rgba(51, 178, 124, 0.12);
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-about .flowline__step:hover .flowline__dot,
.page-about .flowline__step:focus-within .flowline__dot {
  background: var(--grass);
  color: var(--deep);
}

.page-about .flowline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .flowline__desc {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-flow-fig {
  margin: 0;
}

/* ---------- roles ---------- */

.page-about .roles {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-about .roles__card {
  padding: 20px 20px 22px;
}

.page-about .roles__card .tag {
  margin-bottom: 14px;
}

.page-about .roles__name {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.1rem, 1.9vw, 1.32rem);
  line-height: 1.22;
  color: var(--paper);
}

.page-about .roles__card p {
  margin: 0 0 12px;
  line-height: 1.68;
  color: var(--paper);
  opacity: 0.86;
}

.page-about .roles__cadence {
  margin: 0 !important;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted) !important;
  opacity: 1 !important;
}

.page-about .roles__cadence .num {
  color: var(--score);
}

/* ---------- outlook ---------- */

.page-about .outlook {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: clamp(26px, 3.6vw, 40px);
}

.page-about .outlook__item {
  background: var(--panel);
  padding: clamp(18px, 2.4vw, 26px);
  transition: background 200ms var(--ease);
}

.page-about .outlook__item:hover {
  background: #16304b;
}

.page-about .outlook__idx {
  display: block;
  margin-bottom: 10px;
  color: var(--sprout);
}

.page-about .outlook__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  line-height: 1.24;
  color: var(--paper);
}

.page-about .outlook__item p {
  margin: 0;
  line-height: 1.68;
  color: var(--muted);
}

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

.page-about .about-cta {
  display: grid;
  gap: 16px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--odds);
  background: linear-gradient(120deg, rgba(255, 122, 47, 0.09), rgba(51, 178, 124, 0.06) 60%, transparent);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  line-height: 1.68;
  color: var(--paper);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- index rail ---------- */

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  min-width: 0;
}

.page-about .about-index__head {
  margin: 0 0 14px;
  color: var(--muted);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 8px;
  border-left: 2px solid transparent;
  font-size: 0.92rem;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--grass);
  background: rgba(51, 178, 124, 0.08);
  outline: none;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--grass);
  flex: 0 0 auto;
}

.page-about .about-index__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}

/* ---------- media ---------- */

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background-color: var(--panel);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(36, 64, 94, 0.5) 0 1px,
    transparent 1px 9px
  );
  box-shadow: var(--shadow-paper);
}

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

.page-about .media-frame--tall {
  aspect-ratio: 3 / 4;
}

.page-about .media-frame--wide {
  aspect-ratio: 16 / 9;
}

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

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

@media (min-width: 1000px) {
  .page-about .about-hero__lower {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1fr);
    gap: clamp(28px, 3.6vw, 48px);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
  }

  .page-about .about-split--reverse .about-split__body {
    order: 1;
  }

  .page-about .about-split--reverse .about-split__fig {
    order: 2;
  }

  .page-about .flowline__deco {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: -18px;
    width: 100%;
    height: 44px;
    pointer-events: none;
    opacity: 0.55;
  }

  .page-about .flowline__steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
    padding-top: 22px;
  }

  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .phase__summary {
    flex-wrap: wrap;
    gap: 8px;
  }

  .page-about .phase__meta {
    width: 100%;
  }
}

@media (min-width: 1180px) {
  .page-about .about-shell {
    grid-template-columns: minmax(0, 1fr) 208px;
    gap: clamp(36px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: var(--anchor);
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: 20px;
    max-height: calc(100vh - var(--anchor) - 40px);
    overflow-y: auto;
  }

  .page-about .about-chapter {
    padding-left: var(--about-hang);
  }

  .page-about .chapter__num {
    position: absolute;
    left: 0;
    top: clamp(40px, 5.4vw, 66px);
    margin: 0;
    font-size: clamp(3rem, 5.2vw, 4.6rem);
    line-height: 0.86;
    width: calc(var(--about-hang) - 18px);
  }
}

@media (min-width: 1400px) {
  .page-about .about-hero h1 {
    max-width: 16ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .phase,
  .page-about .flowline__step,
  .page-about .flowline__dot,
  .page-about .chapter__num,
  .page-about .about-index__link,
  .page-about .outlook__item {
    transition: none;
  }

  .page-about .phase:hover,
  .page-about .phase[open],
  .page-about .flowline__step:hover,
  .page-about .flowline__step:focus-within {
    transform: none;
  }
}