.page-about {
  --ab-rail: 208px;
  --ab-gap: clamp(1.6rem, 4vw, 3.4rem);
  --ab-cut: 20px;
  display: block;
  position: relative;
  color: var(--ink);
  background: var(--bg);
}

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

.page-about .cut-panel {
  clip-path: polygon(
    var(--ab-cut) 0,
    100% 0,
    100% calc(100% - var(--ab-cut)),
    calc(100% - var(--ab-cut)) 100%,
    0 100%,
    0 var(--ab-cut)
  );
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(2.2rem, 6vw, 4.2rem);
  background:
    radial-gradient(95% 80% at 92% 2%, rgba(30, 111, 92, .44), transparent 66%),
    linear-gradient(165deg, var(--bg) 0%, var(--bg-deep) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -22%;
  width: 64%;
  height: 74%;
  background: linear-gradient(150deg, rgba(198, 242, 78, .09), transparent 72%);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero-copy .eyebrow {
  display: block;
  margin: 0 0 .8rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-about .about-hero-copy h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  font-weight: 700;
  max-width: 18ch;
}

.page-about .about-lede {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(1rem, 1.5vw, 1.075rem);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-hero-stat {
  position: relative;
  padding: 1.2rem 1.25rem 1.3rem;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(12, 26, 22, .92), rgba(10, 12, 11, .94));
}

.page-about .about-stat-cap {
  margin: 0;
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-stat-list {
  list-style: none;
  margin: .9rem 0 0;
  padding: 0;
}

.page-about .about-stat-list li {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-stat-list li:last-child {
  border-bottom: 0;
}

.page-about .about-stat-num {
  min-width: 3.4ch;
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat-unit {
  font-size: .92rem;
  color: var(--ink-soft);
}

.page-about .about-stat-foot {
  margin: 1rem 0 0;
  padding-top: .9rem;
  border-top: 1px solid var(--line);
  font-size: .82rem;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- Layout ---------- */

.page-about .about-body {
  padding: clamp(2.4rem, 6vw, 4.6rem) 0 clamp(3rem, 8vw, 6rem);
  background:
    linear-gradient(180deg, rgba(10, 12, 11, .55) 0%, var(--bg) 42%, var(--bg) 100%);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
  align-items: start;
}

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

.page-about .about-rail-cap {
  margin: 0 0 .6rem;
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-index {
  list-style: none;
  display: flex;
  gap: .45rem;
  margin: 0;
  padding: 0 0 .3rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index li {
  flex: 0 0 auto;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .7rem;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: .84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-index a .mono {
  color: var(--mute);
  font-size: .74rem;
  letter-spacing: .06em;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--neon-soft);
  border-color: var(--neon);
  background: rgba(198, 242, 78, .07);
}

.page-about .about-index a:hover .mono,
.page-about .about-index a:focus-visible .mono {
  color: var(--neon);
}

/* ---------- Chapters ---------- */

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

.page-about .about-chapter {
  position: relative;
  padding-bottom: clamp(2.4rem, 6vw, 4rem);
}

.page-about .about-chapter + .about-chapter {
  padding-top: clamp(2.4rem, 6vw, 4rem);
  border-top: 1px solid var(--line);
}

.page-about .about-chapter-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .5rem 1rem;
  align-items: baseline;
  margin-bottom: 1.2rem;
}

.page-about .about-chapter-num {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-chapter-title {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  line-height: 1.3;
  letter-spacing: -.015em;
  font-weight: 700;
}

.page-about .about-chapter-note {
  margin: 0 0 1.6rem;
  max-width: 46ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-chapter-body {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-about .about-prose {
  max-width: 44ch;
}

.page-about .about-prose p {
  margin: 0 0 1.1em;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.page-about .about-prose p:first-child {
  color: var(--ink);
}

/* ---------- Media ---------- */

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

.page-about .about-media .photo-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(30, 111, 92, .28), rgba(10, 12, 11, .9));
  clip-path: polygon(
    var(--ab-cut) 0,
    100% 0,
    100% calc(100% - var(--ab-cut)),
    calc(100% - var(--ab-cut)) 100%,
    0 100%,
    0 var(--ab-cut)
  );
}

.page-about .about-media .photo-frame img {
  width: 100%;
  display: block;
  filter: saturate(.86) brightness(.88);
}

.page-about .about-media--team .photo-frame img {
  aspect-ratio: 11 / 8;
}

.page-about .about-media .photo-cap {
  margin: .7rem 0 0;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .about-media--rhythm {
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

/* ---------- Four lines ---------- */

.page-about .about-lines {
  display: grid;
  gap: .8rem;
}

.page-about .about-line {
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(30, 111, 92, .14), transparent 70%);
  clip-path: polygon(
    var(--ab-cut) 0,
    100% 0,
    100% calc(100% - var(--ab-cut)),
    calc(100% - var(--ab-cut)) 100%,
    0 100%,
    0 var(--ab-cut)
  );
  transition: border-color .24s var(--ease);
}

.page-about .about-line[open] {
  border-color: rgba(198, 242, 78, .38);
}

.page-about .about-line-sum {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
  padding: .95rem 1.15rem;
  cursor: pointer;
  list-style: none;
  transition: background-color .24s var(--ease);
}

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

.page-about .about-line-sum:hover {
  background: rgba(198, 242, 78, .05);
}

.page-about .about-line-code {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--neon);
}

.page-about .about-line-name {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-line-sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--mute);
  transition: color .2s var(--ease);
}

.page-about .about-line[open] .about-line-sum::after {
  content: "–";
  color: var(--neon);
}

.page-about .about-line-body {
  padding: 0 1.15rem 1.15rem;
  max-width: 46ch;
}

.page-about .about-line-body p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-line .tag {
  font-size: .72rem;
  line-height: 1;
  padding: .3rem .5rem;
  letter-spacing: .04em;
}

/* ---------- Timeline ---------- */

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

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 1.8rem 2rem;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(42, 58, 54, .25));
}

.page-about .about-tl-item:last-child::before {
  display: none;
}

.page-about .about-tl-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border: 1.5px solid var(--line);
  border-radius: 2px;
  transform: rotate(45deg);
  background: var(--bg);
  transition: border-color .3s var(--ease), background-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-tl-item.is-current::after,
.page-about .about-tl-item:hover::after {
  border-color: var(--neon);
  background: var(--neon);
  box-shadow: 0 0 0 5px rgba(198, 242, 78, .14);
}

.page-about .about-tl-time {
  display: block;
  margin-bottom: .45rem;
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl-item:not(.is-current) .about-tl-time {
  color: var(--mute);
}

.page-about .about-tl-title {
  margin: 0 0 .4rem;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-tl-body p {
  margin: 0;
  max-width: 42ch;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- Number index cards ---------- */

.page-about .about-index-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
}

.page-about .about-index-card {
  padding: 1.1rem 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--teal);
  background: linear-gradient(150deg, rgba(12, 26, 22, .85), rgba(10, 12, 11, .6));
}

.page-about .about-index-code {
  margin: 0 0 .55rem;
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--mute);
}

.page-about .about-index-card h3 {
  margin: 0 0 .5rem;
  font-size: 1rem;
  font-weight: 600;
}

.page-about .about-index-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- Team ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.2rem);
}

/* ---------- Goto list ---------- */

.page-about .about-goto {
  margin-top: .4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.page-about .about-goto-cap {
  margin: 0 0 .8rem;
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-goto-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-about .about-goto-link {
  display: grid;
  grid-template-columns: 1fr;
  gap: .2rem;
  padding: .85rem .1rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: background-color .22s var(--ease), padding-left .22s var(--ease);
}

.page-about .about-goto-link:hover,
.page-about .about-goto-link:focus-visible {
  background: rgba(198, 242, 78, .05);
  padding-left: .6rem;
}

.page-about .about-goto-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--neon-soft);
}

.page-about .about-goto-desc {
  font-size: .85rem;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- Responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-index-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-goto-link {
    grid-template-columns: 9.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(270px, .82fr);
  }

  .page-about .about-layout {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
  }

  .page-about .about-rail-sticky {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .about-index {
    flex-direction: column;
    overflow: visible;
    gap: .3rem;
    padding-bottom: 0;
  }

  .page-about .about-index a {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: .5rem .6rem;
    white-space: normal;
  }

  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible {
    border-left-color: var(--neon);
  }

  .page-about .about-chapter-body {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-index-card {
    border-left-width: 1px;
    border-top: 2px solid var(--teal);
  }
}

@media (min-width: 1120px) {
  .page-about .about-chapter-body {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-chapter-body .prose {
    max-width: 40ch;
  }

  .page-about .about-media {
    margin-top: .2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-line,
  .page-about .about-line-sum,
  .page-about .about-tl-item::after,
  .page-about .about-goto-link {
    transition: none;
  }
}
</main>