.page-about {
  --ab-rule: rgba(16, 32, 46, 0.16);
  --ab-muted: #46596a;
  --ab-page-num: rgba(11, 42, 74, 0.09);
  background: var(--paper);
  color: var(--char);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  overflow-x: hidden;
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  background:
    radial-gradient(circle at 84% 12%, rgba(232, 196, 124, 0.18), transparent 46%),
    radial-gradient(circle at 6% 92%, rgba(47, 93, 80, 0.35), transparent 52%),
    var(--ink-deep);
  color: var(--paper);
  border-bottom: 3px solid var(--coral);
  padding-bottom: clamp(36px, 6vw, 64px);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(247, 241, 230, 0.14) 1px, transparent 1px);
  background-size: 14px 14px;
  opacity: 0.5;
  mask-image: linear-gradient(120deg, transparent 35%, #000 100%);
  -webkit-mask-image: linear-gradient(120deg, transparent 35%, #000 100%);
}

.page-about .ab-hero-wrap {
  position: relative;
  z-index: 1;
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .ab-crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .ab-crumbs li+li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(169, 195, 214, 0.6);
}

.page-about .ab-crumbs a,
.page-about .ab-crumbs span {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .ab-crumbs a:hover,
.page-about .ab-crumbs a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--coral);
}

.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 56px);
  margin-top: clamp(28px, 5vw, 56px);
}

.page-about .ab-eyebrow {
  color: var(--gold);
  font-family: var(--font-num);
  letter-spacing: 0.16em;
  font-size: 11px;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin: 0 0 20px;
  color: var(--paper);
}

.page-about .ab-lead {
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.85;
  color: rgba(247, 241, 230, 0.86);
  max-width: 40em;
  margin: 0 0 26px;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero-aside {
  display: grid;
  gap: 14px;
}

.page-about .ab-aside-block {
  border: 2px solid rgba(169, 195, 214, 0.28);
  background: rgba(30, 74, 110, 0.4);
  padding: 16px 18px;
  box-shadow: 5px 5px 0 rgba(6, 26, 48, 0.45);
}

.page-about .ab-aside-num {
  font-family: var(--font-num);
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin: 0 0 6px;
  line-height: 1.2;
}

.page-about .ab-aside-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 241, 230, 0.82);
}

/* ---------- Body layout ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(36px, 6vw, 72px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .ab-index {
  border-left: 3px solid var(--coral);
  padding: 4px 0 4px 16px;
}

.page-about .ab-index-title {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tide);
  margin: 0 0 12px;
}

.page-about .ab-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.page-about .ab-index-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--ink-deep);
  text-decoration: none;
  font-size: 14px;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}

.page-about .ab-index-list a:hover,
.page-about .ab-index-list a:focus-visible {
  border-bottom-color: var(--coral);
}

.page-about .ab-index-num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .ab-index-foot {
  display: none;
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ab-muted);
}

/* ---------- Sections ---------- */
.page-about .ab-sec {
  position: relative;
  border-top: 2px solid var(--ab-rule);
  padding-top: clamp(28px, 4vw, 44px);
  margin-bottom: clamp(48px, 7vw, 84px);
}

.page-about .ab-sec:last-of-type {
  margin-bottom: clamp(36px, 6vw, 64px);
}

.page-about .ab-sec-num {
  display: block;
  font-family: var(--font-num);
  font-weight: 300;
  font-size: clamp(46px, 11vw, 108px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: var(--ab-page-num);
  margin-bottom: 10px;
}

.page-about .ab-sec-num--light {
  color: rgba(232, 196, 124, 0.22);
}

.page-about .ab-sec-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  margin: 0 0 18px;
  color: var(--ink-deep);
  max-width: 22em;
}

.page-about .ab-sec-title--light {
  color: var(--paper);
}

.page-about .ab-p {
  margin: 0 0 18px;
  max-width: 38em;
  color: var(--char);
}

.page-about .ab-p--light {
  color: rgba(247, 241, 230, 0.86);
}

.page-about .ab-p--tail {
  margin-top: 22px;
  padding-left: 18px;
  border-left: 4px solid var(--coral);
  color: var(--ab-muted);
  font-size: 15px;
}

.page-about .ab-note {
  margin: 22px 0 0;
  font-size: 15px;
  color: var(--ab-muted);
}

.page-about .ab-note a {
  color: var(--ink-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
}

.page-about .ab-note a:hover,
.page-about .ab-note a:focus-visible {
  background: rgba(255, 107, 74, 0.12);
}

/* ---------- Tabs ---------- */
.page-about .ab-tabs {
  position: relative;
  margin-top: 26px;
}

.page-about .ab-tab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .ab-tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 0;
}

.page-about .ab-tab {
  display: inline-block;
  cursor: pointer;
  border: 2px solid var(--ink-deep);
  background: transparent;
  color: var(--ink-deep);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 10px 18px;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-tab:hover {
  background: rgba(30, 74, 110, 0.08);
}

.page-about #ab-upd-keep:checked~.ab-tab-list .ab-tab[for="ab-upd-keep"],
.page-about #ab-upd-sort:checked~.ab-tab-list .ab-tab[for="ab-upd-sort"] {
  background: var(--ink-deep);
  color: var(--paper);
  box-shadow: 4px 4px 0 rgba(11, 42, 74, 0.2);
}

.page-about #ab-upd-keep:focus-visible~.ab-tab-list .ab-tab[for="ab-upd-keep"],
.page-about #ab-upd-sort:focus-visible~.ab-tab-list .ab-tab[for="ab-upd-sort"] {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

.page-about .ab-panels {
  border: 3px solid var(--ink-deep);
  border-top: none;
  background: rgba(255, 255, 255, 0.55);
  padding: clamp(20px, 3.4vw, 32px);
}

.page-about .ab-panel {
  display: none;
}

.page-about #ab-upd-keep:checked~.ab-panels .ab-panel--keep,
.page-about #ab-upd-sort:checked~.ab-panels .ab-panel--sort {
  display: block;
  animation: ab-fade 0.28s ease both;
}

@keyframes ab-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.page-about .ab-panel-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--ink-deep);
}

.page-about .ab-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--char);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 3px;
  background: var(--coral);
}

/* ---------- Layers ---------- */
.page-about .ab-layers {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-layer {
  border: 2px solid var(--ab-rule);
  border-left: 6px solid var(--tide);
  background: rgba(255, 255, 255, 0.5);
  padding: 20px 22px;
  box-shadow: 5px 5px 0 rgba(11, 42, 74, 0.08);
}

.page-about .ab-layer-tag {
  display: inline-block;
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--tide);
  border: 1px solid var(--ab-rule);
  padding: 3px 10px;
}

.page-about .ab-layer-title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--ink-deep);
}

.page-about .ab-layer-text {
  margin: 0;
  font-size: 15.5px;
  color: var(--ab-muted);
  max-width: 34em;
}

.page-about .ab-layer-link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
}

.page-about .ab-layer-link:hover,
.page-about .ab-layer-link:focus-visible {
  border-bottom-color: var(--coral);
}

/* ---------- Desk (dark) ---------- */
.page-about .ab-sec--dark {
  background: var(--ink-deep);
  border-top-color: transparent;
  padding: clamp(28px, 5vw, 48px) clamp(18px, 4vw, 40px) clamp(32px, 5vw, 52px);
  margin-left: calc(-1 * var(--gutter));
  margin-right: calc(-1 * var(--gutter));
  box-shadow: 6px 6px 0 rgba(6, 26, 48, 0.28);
}

.page-about .ab-desk {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .ab-desk-facts {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-about .ab-desk-facts li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 241, 230, 0.84);
}

.page-about .ab-desk-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .ab-desk-facts strong {
  color: var(--gold);
  font-weight: 600;
}

/* ---------- Figures ---------- */
.page-about .ab-figure {
  margin: 26px 0 0;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--ink-deep);
  box-shadow: 6px 6px 0 rgba(11, 42, 74, 0.16);
  background: var(--tide);
}

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

.page-about .ab-figure--desk img {
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(6, 26, 48, 0.55);
}

.page-about .ab-figcap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ab-muted);
}

.page-about .ab-figure--desk .ab-figcap {
  color: rgba(169, 195, 214, 0.9);
}

/* ---------- Steps ---------- */
.page-about .ab-steps {
  margin-top: 24px;
  display: grid;
  gap: 10px;
}

.page-about .ab-step {
  border: 2px solid var(--ab-rule);
  border-left: 5px solid var(--coral);
  background: rgba(255, 255, 255, 0.6);
  padding: 4px 16px;
  box-shadow: 4px 4px 0 rgba(11, 42, 74, 0.07);
}

.page-about .ab-step summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-deep);
}

.page-about .ab-step summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1;
  color: var(--tide);
}

.page-about .ab-step[open] summary::after {
  content: "−";
  color: var(--coral);
}

.page-about .ab-step summary:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

.page-about .ab-step-num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .ab-step p {
  margin: 0 0 14px;
  padding-left: 34px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 36em;
}

/* ---------- Timeline ---------- */
.page-about .ab-tl-graphic {
  margin: 20px 0 8px;
  border: 2px solid var(--ab-rule);
  background: rgba(255, 255, 255, 0.55);
  padding: 8px 10px;
}

.page-about .ab-tl-graphic svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-tl {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .ab-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 22px 22px;
  border-left: 2px solid rgba(11, 42, 74, 0.18);
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 10px;
  width: 12px;
  height: 12px;
  background: var(--ink-deep);
  border: 2px solid var(--paper);
}

.page-about .ab-tl-item--key::before {
  background: var(--gold);
  width: 14px;
  height: 14px;
  left: -8px;
}

.page-about .ab-tl-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .ab-tl-year {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--tide);
}

.page-about .ab-tl-item--key .ab-tl-year {
  color: var(--coral);
}

.page-about .ab-tl-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--ink-deep);
}

.page-about .ab-tl-body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 36em;
}

/* ---------- Stats ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-stat {
  border-top: 3px solid var(--ink-deep);
  padding-top: 12px;
}

.page-about .ab-stat-num {
  font-family: var(--font-num);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--ink-deep);
}

.page-about .ab-stat-label {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ab-muted);
}

/* ---------- Next ---------- */
.page-about .ab-next {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(26px, 5vw, 44px) clamp(18px, 4vw, 40px);
  border-top: 3px solid var(--coral);
  margin-left: calc(-1 * var(--gutter));
  margin-right: calc(-1 * var(--gutter));
}

.page-about .ab-next-kicker {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .ab-next-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.35;
  margin: 0 0 22px;
  color: var(--paper);
  max-width: 24em;
}

.page-about .ab-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .ab-next-card {
  display: block;
  text-decoration: none;
  border: 2px solid rgba(169, 195, 214, 0.3);
  padding: 14px 16px;
  color: var(--paper);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.page-about .ab-next-card:hover,
.page-about .ab-next-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: 5px 5px 0 rgba(255, 107, 74, 0.35);
}

.page-about .ab-next-num {
  display: block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 4px;
}

.page-about .ab-next-name {
  display: block;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.page-about .ab-next-desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(247, 241, 230, 0.76);
}

/* ---------- Reveal ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- Media queries ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

  .page-about .ab-tl-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 18px;
  }

  .page-about .ab-tl-year {
    padding-top: 2px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-body {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 5vw, 68px);
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--head-total) + 24px);
  }

  .page-about .ab-index-list {
    display: block;
  }

  .page-about .ab-index-list li+li {
    margin-top: 10px;
  }

  .page-about .ab-index-foot {
    display: block;
  }

  .page-about .ab-sec--dark,
  .page-about .ab-next {
    margin-left: 0;
    margin-right: 0;
  }

  .page-about .ab-desk {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .ab-layers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: stretch;
  }

  .page-about .ab-layer {
    display: flex;
    flex-direction: column;
  }

  .page-about .ab-layer-link {
    margin-top: auto;
    align-self: flex-start;
  }

  .page-about .ab-next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about #ab-upd-keep:checked~.ab-panels .ab-panel--keep,
  .page-about #ab-upd-sort:checked~.ab-panels .ab-panel--sort {
    animation: none;
  }

  .page-about .ab-next-card {
    transition: none;
  }

  .page-about .ab-next-card:hover,
  .page-about .ab-next-card:focus-visible {
    transform: none;
  }
}

.page-about {
  --ab-rule: rgba(16, 32, 46, 0.16);
  --ab-muted: #46596a;
  --ab-page-num: rgba(11, 42, 74, 0.09);
  background: var(--paper);
  color: var(--char);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  overflow-x: hidden;
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  background:
    radial-gradient(circle at 84% 12%, rgba(232, 196, 124, 0.18), transparent 46%),
    radial-gradient(circle at 6% 92%, rgba(47, 93, 80, 0.35), transparent 52%),
    var(--ink-deep);
  color: var(--paper);
  border-bottom: 3px solid var(--coral);
  padding-bottom: clamp(36px, 6vw, 64px);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(247, 241, 230, 0.14) 1px, transparent 1px);
  background-size: 14px 14px;
  opacity: 0.5;
  mask-image: linear-gradient(120deg, transparent 35%, #000 100%);
  -webkit-mask-image: linear-gradient(120deg, transparent 35%, #000 100%);
}

.page-about .ab-hero-wrap {
  position: relative;
  z-index: 1;
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .ab-crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .ab-crumbs li+li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(169, 195, 214, 0.6);
}

.page-about .ab-crumbs a,
.page-about .ab-crumbs span {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .ab-crumbs a:hover,
.page-about .ab-crumbs a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--coral);
}

.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 56px);
  margin-top: clamp(28px, 5vw, 56px);
}

.page-about .ab-eyebrow {
  color: var(--gold);
  font-family: var(--font-num);
  letter-spacing: 0.16em;
  font-size: 11px;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin: 0 0 20px;
  color: var(--paper);
}

.page-about .ab-lead {
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.85;
  color: rgba(247, 241, 230, 0.86);
  max-width: 40em;
  margin: 0 0 26px;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero-aside {
  display: grid;
  gap: 14px;
}

.page-about .ab-aside-block {
  border: 2px solid rgba(169, 195, 214, 0.28);
  background: rgba(30, 74, 110, 0.4);
  padding: 16px 18px;
  box-shadow: 5px 5px 0 rgba(6, 26, 48, 0.45);
}

.page-about .ab-aside-num {
  font-family: var(--font-num);
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin: 0 0 6px;
  line-height: 1.2;
}

.page-about .ab-aside-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 241, 230, 0.82);
}

/* ---------- Body layout ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(36px, 6vw, 72px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .ab-index {
  border-left: 3px solid var(--coral);
  padding: 4px 0 4px 16px;
}

.page-about .ab-index-title {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tide);
  margin: 0 0 12px;
}

.page-about .ab-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.page-about .ab-index-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--ink-deep);
  text-decoration: none;
  font-size: 14px;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}

.page-about .ab-index-list a:hover,
.page-about .ab-index-list a:focus-visible {
  border-bottom-color: var(--coral);
}

.page-about .ab-index-num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .ab-index-foot {
  display: none;
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ab-muted);
}

/* ---------- Sections ---------- */
.page-about .ab-sec {
  position: relative;
  border-top: 2px solid var(--ab-rule);
  padding-top: clamp(28px, 4vw, 44px);
  margin-bottom: clamp(48px, 7vw, 84px);
}

.page-about .ab-sec:last-of-type {
  margin-bottom: clamp(36px, 6vw, 64px);
}

.page-about .ab-sec-num {
  display: block;
  font-family: var(--font-num);
  font-weight: 300;
  font-size: clamp(46px, 11vw, 108px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: var(--ab-page-num);
  margin-bottom: 10px;
}

.page-about .ab-sec-num--light {
  color: rgba(232, 196, 124, 0.22);
}

.page-about .ab-sec-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  margin: 0 0 18px;
  color: var(--ink-deep);
  max-width: 22em;
}

.page-about .ab-sec-title--light {
  color: var(--paper);
}

.page-about .ab-p {
  margin: 0 0 18px;
  max-width: 38em;
  color: var(--char);
}

.page-about .ab-p--light {
  color: rgba(247, 241, 230, 0.86);
}

.page-about .ab-p--tail {
  margin-top: 22px;
  padding-left: 18px;
  border-left: 4px solid var(--coral);
  color: var(--ab-muted);
  font-size: 15px;
}

.page-about .ab-note {
  margin: 22px 0 0;
  font-size: 15px;
  color: var(--ab-muted);
}

.page-about .ab-note a {
  color: var(--ink-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
}

.page-about .ab-note a:hover,
.page-about .ab-note a:focus-visible {
  background: rgba(255, 107, 74, 0.12);
}

/* ---------- Tabs ---------- */
.page-about .ab-tabs {
  position: relative;
  margin-top: 26px;
}

.page-about .ab-tab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .ab-tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 0;
}

.page-about .ab-tab {
  display: inline-block;
  cursor: pointer;
  border: 2px solid var(--ink-deep);
  background: transparent;
  color: var(--ink-deep);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 10px 18px;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-tab:hover {
  background: rgba(30, 74, 110, 0.08);
}

.page-about #ab-upd-keep:checked~.ab-tab-list .ab-tab[for="ab-upd-keep"],
.page-about #ab-upd-sort:checked~.ab-tab-list .ab-tab[for="ab-upd-sort"] {
  background: var(--ink-deep);
  color: var(--paper);
  box-shadow: 4px 4px 0 rgba(11, 42, 74, 0.2);
}

.page-about #ab-upd-keep:focus-visible~.ab-tab-list .ab-tab[for="ab-upd-keep"],
.page-about #ab-upd-sort:focus-visible~.ab-tab-list .ab-tab[for="ab-upd-sort"] {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

.page-about .ab-panels {
  border: 3px solid var(--ink-deep);
  border-top: none;
  background: rgba(255, 255, 255, 0.55);
  padding: clamp(20px, 3.4vw, 32px);
}

.page-about .ab-panel {
  display: none;
}

.page-about #ab-upd-keep:checked~.ab-panels .ab-panel--keep,
.page-about #ab-upd-sort:checked~.ab-panels .ab-panel--sort {
  display: block;
  animation: ab-fade 0.28s ease both;
}

@keyframes ab-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.page-about .ab-panel-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--ink-deep);
}

.page-about .ab-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--char);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 3px;
  background: var(--coral);
}

/* ---------- Layers ---------- */
.page-about .ab-layers {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-layer {
  border: 2px solid var(--ab-rule);
  border-left: 6px solid var(--tide);
  background: rgba(255, 255, 255, 0.5);
  padding: 20px 22px;
  box-shadow: 5px 5px 0 rgba(11, 42, 74, 0.08);
}

.page-about .ab-layer-tag {
  display: inline-block;
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--tide);
  border: 1px solid var(--ab-rule);
  padding: 3px 10px;
}

.page-about .ab-layer-title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--ink-deep);
}

.page-about .ab-layer-text {
  margin: 0;
  font-size: 15.5px;
  color: var(--ab-muted);
  max-width: 34em;
}

.page-about .ab-layer-link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
}

.page-about .ab-layer-link:hover,
.page-about .ab-layer-link:focus-visible {
  border-bottom-color: var(--coral);
}

/* ---------- Desk (dark) ---------- */
.page-about .ab-sec--dark {
  background: var(--ink-deep);
  border-top-color: transparent;
  padding: clamp(28px, 5vw, 48px) clamp(18px, 4vw, 40px) clamp(32px, 5vw, 52px);
  margin-left: calc(-1 * var(--gutter));
  margin-right: calc(-1 * var(--gutter));
  box-shadow: 6px 6px 0 rgba(6, 26, 48, 0.28);
}

.page-about .ab-desk {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .ab-desk-facts {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-about .ab-desk-facts li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 241, 230, 0.84);
}

.page-about .ab-desk-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .ab-desk-facts strong {
  color: var(--gold);
  font-weight: 600;
}

/* ---------- Figures ---------- */
.page-about .ab-figure {
  margin: 26px 0 0;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--ink-deep);
  box-shadow: 6px 6px 0 rgba(11, 42, 74, 0.16);
  background: var(--tide);
}

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

.page-about .ab-figure--desk img {
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(6, 26, 48, 0.55);
}

.page-about .ab-figcap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ab-muted);
}

.page-about .ab-figure--desk .ab-figcap {
  color: rgba(169, 195, 214, 0.9);
}

/* ---------- Steps ---------- */
.page-about .ab-steps {
  margin-top: 24px;
  display: grid;
  gap: 10px;
}

.page-about .ab-step {
  border: 2px solid var(--ab-rule);
  border-left: 5px solid var(--coral);
  background: rgba(255, 255, 255, 0.6);
  padding: 4px 16px;
  box-shadow: 4px 4px 0 rgba(11, 42, 74, 0.07);
}

.page-about .ab-step summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-deep);
}

.page-about .ab-step summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1;
  color: var(--tide);
}

.page-about .ab-step[open] summary::after {
  content: "−";
  color: var(--coral);
}

.page-about .ab-step summary:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

.page-about .ab-step-num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .ab-step p {
  margin: 0 0 14px;
  padding-left: 34px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 36em;
}

/* ---------- Timeline ---------- */
.page-about .ab-tl-graphic {
  margin: 20px 0 8px;
  border: 2px solid var(--ab-rule);
  background: rgba(255, 255, 255, 0.55);
  padding: 8px 10px;
}

.page-about .ab-tl-graphic svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-tl {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .ab-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 22px 22px;
  border-left: 2px solid rgba(11, 42, 74, 0.18);
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 10px;
  width: 12px;
  height: 12px;
  background: var(--ink-deep);
  border: 2px solid var(--paper);
}

.page-about .ab-tl-item--key::before {
  background: var(--gold);
  width: 14px;
  height: 14px;
  left: -8px;
}

.page-about .ab-tl-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .ab-tl-year {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--tide);
}

.page-about .ab-tl-item--key .ab-tl-year {
  color: var(--coral);
}

.page-about .ab-tl-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--ink-deep);
}

.page-about .ab-tl-body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 36em;
}

/* ---------- Stats ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-stat {
  border-top: 3px solid var(--ink-deep);
  padding-top: 12px;
}

.page-about .ab-stat-num {
  font-family: var(--font-num);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--ink-deep);
}

.page-about .ab-stat-label {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ab-muted);
}

/* ---------- Next ---------- */
.page-about .ab-next {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(26px, 5vw, 44px) clamp(18px, 4vw, 40px);
  border-top: 3px solid var(--coral);
  margin-left: calc(-1 * var(--gutter));
  margin-right: calc(-1 * var(--gutter));
}

.page-about .ab-next-kicker {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .ab-next-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.35;
  margin: 0 0 22px;
  color: var(--paper);
  max-width: 24em;
}

.page-about .ab-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .ab-next-card {
  display: block;
  text-decoration: none;
  border: 2px solid rgba(169, 195, 214, 0.3);
  padding: 14px 16px;
  color: var(--paper);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.page-about .ab-next-card:hover,
.page-about .ab-next-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: 5px 5px 0 rgba(255, 107, 74, 0.35);
}

.page-about .ab-next-num {
  display: block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 4px;
}

.page-about .ab-next-name {
  display: block;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.page-about .ab-next-desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(247, 241, 230, 0.76);
}

/* ---------- Reveal ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- Media queries ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-tl-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 18px;
  }

  .page-about .ab-tl-year {
    padding-top: 2px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-body {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 5vw, 68px);
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--head-total) + 24px);
  }

  .page-about .ab-index-list {
    display: block;
  }

  .page-about .ab-index-list li+li {
    margin-top: 10px;
  }

  .page-about .ab-index-foot {
    display: block;
  }

  .page-about .ab-sec--dark,
  .page-about .ab-next {
    margin-left: 0;
    margin-right: 0;
  }

  .page-about .ab-desk {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .ab-layers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: stretch;
  }

  .page-about .ab-layer {
    display: flex;
    flex-direction: column;
  }

  .page-about .ab-layer-link {
    margin-top: auto;
    align-self: flex-start;
  }

  .page-about .ab-next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about #ab-upd-keep:checked~.ab-panels .ab-panel--keep,
  .page-about #ab-upd-sort:checked~.ab-panels .ab-panel--sort {
    animation: none;
  }

  .page-about .ab-next-card {
    transition: none;
  }

  .page-about .ab-next-card:hover,
  .page-about .ab-next-card:focus-visible {
    transform: none;
  }
}