.engagements-section {
  position: relative;
  overflow: hidden;
  padding: clamp(5.25rem, 8.5vw, 8rem) 0 clamp(5.75rem, 9vw, 8.75rem);
  background: var(--color-surface);
  scroll-margin-top: 5.2rem;
}

.engagements-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--color-signal-rgb), .5), transparent);
}

.engagements-section .container { position: relative; z-index: 1; }

.engagements-section__head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, .72fr);
  gap: 1.25rem clamp(3rem, 8vw, 9rem);
  align-items: end;
  margin-bottom: clamp(3rem, 5.5vw, 5rem);
}

.engagements-section__head .micro-label,
.engagements-section__head h2 { grid-column: 1; }

.engagements-section__head h2 {
  max-width: 13.5ch;
  font-size: clamp(2.6rem, 4.15vw, 4.05rem);
  line-height: 1.02;
  letter-spacing: -.052em;
}

.engagements-section__head > p:last-child {
  grid-column: 2;
  grid-row: 2;
  max-width: 35rem;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.68;
}

.engagement-index {
  --active-row: 0;
  position: relative;
  border-top: 1px solid rgba(var(--color-ink-rgb), .18);
  border-bottom: 1px solid rgba(var(--color-ink-rgb), .18);
}

.engagement-index__rail {
  position: absolute;
  z-index: 2;
  left: 0;
  top: 0;
  width: 2px;
  height: 25%;
  pointer-events: none;
  background: var(--color-signal);
  transform: translateY(calc(var(--active-row) * 100%));
  transition: transform 360ms var(--ease-out);
}

.engagement-record {
  position: relative;
  border-bottom: 1px solid rgba(var(--color-ink-rgb), .13);
}

.engagement-record:last-child { border-bottom: 0; }

.engagement-record__trigger {
  position: relative;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(9rem, .28fr) minmax(12rem, .48fr) minmax(18rem, 1fr);
  grid-template-rows: auto auto auto;
  gap: .55rem clamp(1.5rem, 4vw, 4.25rem);
  align-items: start;
  padding: clamp(1.65rem, 2.5vw, 2.25rem) clamp(2rem, 4vw, 4rem);
  color: var(--color-text);
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  transition: background var(--duration-medium), padding var(--duration-fast) var(--ease-out);
}

.engagement-record__trigger:hover,
.engagement-record__trigger:focus-visible,
.engagement-record.is-active > .engagement-record__trigger { background: rgba(var(--color-signal-rgb), .045); }

.engagement-record__trigger:focus-visible {
  z-index: 3;
  outline-offset: -4px;
}

.engagement-record__number {
  grid-column: 1;
  grid-row: 1;
  color: var(--color-signal-strong);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .055em;
  line-height: 1.4;
}

.engagement-record__trigger > strong {
  grid-column: 2;
  grid-row: 1;
  font: 600 clamp(1.2rem, 1.7vw, 1.55rem)/1.15 var(--font-display);
  letter-spacing: -.035em;
}

.engagement-record__trigger > small {
  grid-column: 2;
  grid-row: 2;
  color: var(--color-text-muted);
  font-size: .875rem;
  line-height: 1.5;
}

.engagement-record__role-summary {
  grid-column: 3;
  grid-row: 1;
  color: var(--color-text);
  font: 600 1rem/1.45 var(--font-display);
  letter-spacing: -.018em;
}

.engagement-record__context-summary {
  grid-column: 3;
  grid-row: 2;
  max-width: 58ch;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.6;
}

.engagement-record__index-lens {
  grid-column: 3;
  grid-row: 3;
  max-width: 64ch;
  color: var(--color-text-muted);
  font-size: .9375rem;
  line-height: 1.58;
}

.engagement-record__index-lens b {
  display: inline-block;
  margin-right: .5rem;
  color: var(--color-signal-strong);
  font-size: .75rem;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.engagement-record__trigger > i {
  position: absolute;
  right: 1.4rem;
  top: 2rem;
  width: .65rem;
  height: .65rem;
  border-right: 1px solid var(--color-signal-strong);
  border-bottom: 1px solid var(--color-signal-strong);
  transform: rotate(45deg);
  transition: transform var(--duration-fast) var(--ease-out);
}

.engagement-record.is-active > .engagement-record__trigger > i { transform: translateY(3px) rotate(225deg); }

.engagement-record__detail {
  padding: clamp(1.75rem, 3vw, 2.75rem) clamp(2rem, 4vw, 4rem);
  color: #f4f6f3;
  background:
    radial-gradient(circle at 88% 10%, rgba(var(--color-signal-rgb), .13), transparent 22rem),
    linear-gradient(145deg, #102c3b, #071725 78%);
  border-top: 1px solid rgba(var(--color-ink-rgb), .08);
}

.engagement-record__detail[hidden] { display: none !important; }

.engagement-record__evidence {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, .48fr);
  gap: clamp(2rem, 6vw, 6rem);
}

.engagement-record__evidence:has(> div:only-child) { grid-template-columns: 1fr; }

.engagement-record__label {
  color: #89d5ca;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .055em;
}

.engagement-record__evidence ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem 2rem;
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
}

.engagement-record__evidence li {
  position: relative;
  padding-left: 1rem;
  color: rgba(244,246,243,.76);
  font-size: 1.025rem;
  line-height: 1.58;
}

.engagement-record__evidence li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: .35rem;
  height: .35rem;
  background: #79cbbf;
}

.engagement-record__deliverable {
  align-self: start;
  padding-left: 1.35rem;
  border-left: 2px solid #79cbbf;
}

.engagement-record__deliverable strong {
  display: block;
  margin-top: .8rem;
  color: #f4f6f3;
  font: 600 clamp(1.45rem, 2.1vw, 1.95rem)/1.18 var(--font-display);
  letter-spacing: -.035em;
}

.engagement-record__deliverable span {
  display: block;
  margin-top: .55rem;
  color: rgba(244,246,243,.64);
  font-size: .9375rem;
  line-height: 1.55;
}

.engagements-section__exit {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: min(100% - (var(--gutter) * 2), var(--container-main));
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--color-signal-rgb), .45), rgba(var(--color-ink-rgb), .12), transparent);
  transform: translateX(-50%);
}

.engagements-section__exit i { position: absolute; left: 36%; top: -2px; width: 5px; aspect-ratio: 1; background: var(--color-signal); }

@media (max-width: 900px) {
  .engagements-section__head { grid-template-columns: 1fr; }
  .engagements-section__head .micro-label,
  .engagements-section__head h2,
  .engagements-section__head > p:last-child { grid-column: 1; grid-row: auto; }
  .engagement-record__trigger { grid-template-columns: minmax(8rem, .34fr) minmax(0, 1fr); }
  .engagement-record__number { grid-column: 1; }
  .engagement-record__trigger > strong,
  .engagement-record__trigger > small { grid-column: 2; }
  .engagement-record__role-summary,
  .engagement-record__context-summary,
  .engagement-record__index-lens { grid-column: 1 / -1; grid-row: auto; }
  .engagement-record__role-summary { margin-top: .55rem; }
}

@media (max-width: 640px) {
  .engagements-section { padding-block: 4.5rem 5.25rem; }
  .engagements-section__head { gap: 1rem; margin-bottom: 2.6rem; }
  .engagements-section__head h2 { max-width: 14ch; font-size: clamp(2.3rem, 9.5vw, 2.8rem); line-height: 1.06; }
  .engagements-section__head > p:last-child { font-size: 1rem; line-height: 1.65; }
  .engagement-index__rail { display: none; }
  .engagement-record__trigger { grid-template-columns: 1fr; gap: .45rem; padding: 1.45rem .15rem 1.45rem 0; }
  .engagement-record__number,
  .engagement-record__trigger > strong,
  .engagement-record__trigger > small,
  .engagement-record__role-summary,
  .engagement-record__context-summary,
  .engagement-record__index-lens { grid-column: 1; grid-row: auto; }
  .engagement-record__trigger > strong { margin-top: .25rem; font-size: 1.4rem; }
  .engagement-record__trigger > small { font-size: .8125rem; }
  .engagement-record__role-summary { margin-top: .55rem; font-size: 1rem; }
  .engagement-record__context-summary { font-size: 1rem; }
  .engagement-record__index-lens { margin-top: .35rem; font-size: 1rem; }
  .engagement-record__trigger > i { right: .2rem; top: 1.75rem; }
  .engagement-record__detail { margin-inline: calc(var(--gutter) * -1); padding: 1.5rem var(--gutter); }
  .engagement-record__evidence { grid-template-columns: 1fr; gap: 1.75rem; }
  .engagement-record__evidence ul { grid-template-columns: 1fr; }
}