.engagements-section {
  position: relative;
  overflow: hidden;
  padding: clamp(5.75rem, 9vw, 9rem) 0 clamp(6rem, 10vw, 9.5rem);
  background: var(--color-paper);
  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), .52), transparent);
}

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

.engagements-section__head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(19rem, .7fr);
  column-gap: clamp(3rem, 8vw, 9rem);
  row-gap: 1.25rem;
  margin-bottom: clamp(3rem, 6vw, 5.5rem);
}

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

.engagements-section__head h2 {
  max-width: 12ch;
  font-size: clamp(2.7rem, 4.7vw, 4.6rem);
  line-height: 1;
  letter-spacing: -.055em;
}

.engagements-section__head > p:last-child {
  grid-column: 2;
  grid-row: 2;
  align-self: end;
  max-width: 34rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-body-lg);
  line-height: 1.72;
}

.engagement-index {
  --active-row: 0;
  position: relative;
  display: grid;
  grid-template-columns: minmax(15.5rem, .66fr) minmax(0, 1.55fr);
  grid-template-rows: repeat(4, minmax(7.5rem, auto));
  min-height: 39rem;
  border: 1px solid rgba(var(--color-ink-rgb), .16);
  background: var(--color-surface);
}

.engagement-index__rail {
  position: absolute;
  z-index: 3;
  left: 0;
  top: 0;
  width: 3px;
  height: 25%;
  padding-block: .7rem;
  pointer-events: none;
  transform: translateY(calc(var(--active-row) * 100%));
  transition: transform 420ms var(--ease-out);
}

.engagement-index__rail span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-signal);
}

.engagement-record { display: contents; }

.engagement-record:nth-of-type(1) .engagement-record__trigger { grid-row: 1; }
.engagement-record:nth-of-type(2) .engagement-record__trigger { grid-row: 2; }
.engagement-record:nth-of-type(3) .engagement-record__trigger { grid-row: 3; }
.engagement-record:nth-of-type(4) .engagement-record__trigger { grid-row: 4; }

.engagement-record__trigger {
  position: relative;
  z-index: 2;
  grid-column: 1;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: .38rem;
  min-width: 0;
  padding: 1.15rem clamp(1.2rem, 2.5vw, 2rem);
  color: var(--color-text);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(var(--color-ink-rgb), .11);
  cursor: pointer;
  transition: color var(--duration-fast), background var(--duration-medium), padding var(--duration-fast) var(--ease-out);
}

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

.engagement-record__trigger::after {
  content: "→";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  color: var(--color-signal-strong);
  font-size: .9rem;
  opacity: 0;
  transform: translate(-5px, -50%);
  transition: opacity var(--duration-fast), transform var(--duration-fast) var(--ease-out);
}

.engagement-record__number {
  color: var(--color-signal-strong);
  font-size: .56rem;
  font-weight: 600;
  letter-spacing: .075em;
  line-height: 1.3;
}

.engagement-record__trigger strong {
  padding-right: 1.5rem;
  font: 600 clamp(1.08rem, 1.6vw, 1.35rem)/1.1 var(--font-display);
  letter-spacing: -.035em;
}

.engagement-record__trigger small {
  color: var(--color-text-muted);
  font-size: .64rem;
  font-weight: 600;
  line-height: 1.4;
}

.engagement-record__index-lens {
  max-width: 30ch;
  color: var(--color-text-muted);
  font-size: .65rem;
  line-height: 1.4;
}

.engagement-record__trigger:hover,
.engagement-record__trigger:focus-visible,
.engagement-record.is-active .engagement-record__trigger {
  padding-left: clamp(1.5rem, 2.9vw, 2.35rem);
  color: var(--color-ink);
  background: rgba(var(--color-signal-rgb), .075);
}

.engagement-record__trigger:hover::after,
.engagement-record__trigger:focus-visible::after,
.engagement-record.is-active .engagement-record__trigger::after {
  opacity: 1;
  transform: translate(0, -50%);
}

.engagement-record__trigger:focus-visible {
  z-index: 4;
  outline: 3px solid var(--color-signal);
  outline-offset: -3px;
}

.engagement-record__detail {
  position: relative;
  z-index: 1;
  grid-column: 2;
  grid-row: 1 / span 4;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(2rem, 4.4vw, 4rem);
  overflow: hidden;
  color: #f4f6f3;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  background: linear-gradient(142deg, rgba(16, 44, 59, .98), rgba(7, 23, 37, 1) 72%);
  transform: translateX(10px);
  transition: opacity 360ms var(--ease-out), transform 420ms var(--ease-out), visibility 0s linear 420ms;
}

.engagement-record__detail::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .24;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: clamp(4rem, 6vw, 6.5rem) clamp(4rem, 6vw, 6.5rem);
  mask-image: linear-gradient(135deg, black, transparent 72%);
}

.engagement-record__detail::after {
  content: "";
  position: absolute;
  right: -14rem;
  top: -17rem;
  width: 35rem;
  aspect-ratio: 1;
  border: 1px solid rgba(121, 203, 191, .18);
  border-radius: 50%;
  pointer-events: none;
}

.engagement-record.is-active .engagement-record__detail {
  z-index: 2;
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
  transition-delay: 0s;
}

.engagement-record__detail > * { position: relative; z-index: 1; }

.engagement-record__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem 1.2rem;
  margin-bottom: auto;
  color: rgba(244, 246, 243, .58);
  font-size: .58rem;
  font-weight: 600;
  letter-spacing: .07em;
  line-height: 1.4;
  text-transform: uppercase;
}

.engagement-record__meta span { position: relative; }
.engagement-record__meta span + span::before { content: "/"; position: absolute; left: -.75rem; color: #79cbbf; }

.engagement-record__case {
  margin: clamp(2.2rem, 5vh, 3.6rem) 0 .75rem;
  color: #89d5ca;
  font-size: .58rem;
  font-weight: 600;
  letter-spacing: .075em;
  text-transform: uppercase;
}

.engagement-record__detail h3 {
  max-width: 14ch;
  margin: 0;
  color: #f4f6f3;
  font-size: clamp(2.6rem, 5vw, 5rem);
  font-weight: 500;
  line-height: .96;
  letter-spacing: -.06em;
}

.engagement-record__role {
  margin: .85rem 0 0;
  color: #a7ddd5;
  font: 600 clamp(.82rem, 1.15vw, 1rem)/1.45 var(--font-display);
  letter-spacing: -.02em;
}

.engagement-record__context {
  max-width: 55ch;
  margin: 1.25rem 0 0;
  color: rgba(244, 246, 243, .72);
  font-size: clamp(.88rem, 1.15vw, 1rem);
  line-height: 1.65;
}

.engagement-record__evidence {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(12rem, .75fr);
  gap: clamp(1.5rem, 4vw, 3.6rem);
  margin-top: clamp(1.7rem, 4vh, 2.8rem);
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,.14);
}

.engagement-record__label {
  margin: 0 0 .72rem;
  color: rgba(244, 246, 243, .46);
  font-size: .54rem;
  font-weight: 600;
  letter-spacing: .075em;
  text-transform: uppercase;
}

.engagement-record__evidence ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .38rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.engagement-record__evidence li {
  position: relative;
  padding-left: .85rem;
  color: rgba(244, 246, 243, .72);
  font-size: .68rem;
  line-height: 1.48;
}

.engagement-record__evidence li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 4px;
  height: 4px;
  background: #79cbbf;
}

.engagement-record__deliverable {
  align-content: start;
  display: grid;
}

.engagement-record__deliverable strong {
  color: #f4f6f3;
  font: 600 clamp(1.05rem, 1.5vw, 1.3rem)/1.2 var(--font-display);
  letter-spacing: -.035em;
}

.engagement-record__deliverable span {
  margin-top: .35rem;
  color: rgba(244, 246, 243, .54);
  font-size: .65rem;
  line-height: 1.45;
}

.engagement-record__detail blockquote {
  display: grid;
  gap: .42rem;
  margin: auto 0 0;
  padding: clamp(1.3rem, 2.5vw, 1.8rem) 0 0 clamp(1rem, 2vw, 1.45rem);
  color: #f4f6f3;
  border-left: 2px solid #79cbbf;
  font: 500 clamp(1.15rem, 2vw, 1.7rem)/1.25 var(--font-display);
  letter-spacing: -.035em;
}

.engagement-record__detail blockquote span {
  color: #89d5ca;
  font: 600 .54rem/1.3 var(--font-body);
  letter-spacing: .075em;
}

.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-ink-rgb), .18), rgba(var(--color-signal-rgb), .48), transparent);
  transform: translateX(-50%);
}

.engagements-section__exit i { position: absolute; right: 22%; top: -2px; width: 5px; aspect-ratio: 1; background: var(--color-signal); }

@media (max-width: 900px) {
  .engagements-section__head { grid-template-columns: 1fr; gap: 1.25rem; }
  .engagements-section__head .micro-label,
  .engagements-section__head h2,
  .engagements-section__head > p:last-child { grid-column: 1; grid-row: auto; max-width: 44rem; }
  .engagement-index { grid-template-columns: minmax(13rem, .68fr) minmax(0, 1.35fr); }
  .engagement-record__detail { padding: 2rem; }
  .engagement-record__evidence { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .engagements-section { padding-block: 4.4rem 5rem; }
  .engagements-section__head { margin-bottom: 2.35rem; }
  .engagements-section__head h2 { font-size: clamp(2.45rem, 10vw, 2.9rem); }
  .engagements-section__head > p:last-child { font-size: .97rem; line-height: 1.67; }
  .engagement-index { display: block; min-height: 0; border: 0; background: transparent; }
  .engagement-index__rail { display: none; }
  .engagement-record { display: block; border-top: 1px solid rgba(var(--color-ink-rgb), .17); }
  .engagement-record:last-child { border-bottom: 1px solid rgba(var(--color-ink-rgb), .17); }
  .engagement-record__trigger { width: 100%; min-height: 0; padding: 1rem .25rem .95rem; border: 0; }
  .engagement-record__trigger::after { right: .25rem; }
  .engagement-record__trigger:hover,
  .engagement-record__trigger:focus-visible,
  .engagement-record.is-active .engagement-record__trigger { padding-left: .65rem; }
  .engagement-record__index-lens { display: none; }
  .engagement-record__detail,
  .engagement-record.is-active .engagement-record__detail {
    position: relative;
    display: flex;
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    min-height: 0;
    padding: 1.25rem 1.15rem 1.4rem;
    transform: none;
    transition: none;
  }
  .engagement-record__detail::before { opacity: .14; background-size: 4rem 4rem; }
  .engagement-record__detail::after { width: 20rem; right: -12rem; top: -10rem; }
  .engagement-record__meta { margin-bottom: 0; }
  .engagement-record__case { margin: 1.2rem 0 .55rem; }
  .engagement-record__detail h3 { font-size: clamp(2.25rem, 11vw, 3rem); }
  .engagement-record__context { margin-top: 1rem; font-size: .87rem; }
  .engagement-record__evidence { gap: 1.1rem; margin-top: 1.2rem; padding-top: 1rem; }
  .engagement-record__evidence ul { grid-template-columns: 1fr; gap: .38rem; }
  .engagement-record__evidence li { font-size: .7rem; }
  .engagement-record__detail blockquote { margin-top: 1.35rem; padding-top: 1.1rem; font-size: 1.12rem; }
}

@media (max-width: 390px) {
  .engagement-record__trigger strong { font-size: 1.03rem; }
  .engagement-record__detail { padding-inline: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .engagement-index__rail,
  .engagement-record__trigger,
  .engagement-record__trigger::after,
  .engagement-record__detail { transition: none; }
}