/* ==========================================================================
   Individual reference work
   Uses the same hero and compact switcher principle as service detail pages
   ========================================================================== */

.reference-page-eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.reference-page-eyebrow a {
  color: inherit;
  text-decoration: none;
}

.reference-page-eyebrow a:hover {
  color: var(--color-inverse);
}

.reference-page-eyebrow span {
  color: var(--color-accent);
}

.reference-detail-section {
  position: relative;
  padding-block: clamp(2.75rem, 4.5vw, 5rem);
  background: var(--color-page);
}

.reference-detail-section::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border-strong) 12%,
    var(--color-accent) 50%,
    var(--color-border-strong) 88%,
    transparent 100%
  );
  content: "";
}

.reference-detail-section::after {
  position: absolute;
  top: -0.22rem;
  left: 50%;
  width: 0.45rem;
  height: 0.45rem;
  border: 1px solid var(--color-page);
  background: var(--color-accent);
  content: "";
  transform: translateX(-50%) rotate(45deg);
}

.reference-detail-layout {
  display: grid;
  grid-template-columns: minmax(12rem, 15rem) minmax(0, 68rem);
  gap: clamp(2rem, 4vw, 4.75rem);
  align-items: start;
  justify-content: start;
}

.reference-detail-sidebar {
  position: sticky;
  top: var(--sticky-offset);
}

.reference-side-nav {
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
}

.reference-side-nav-head {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--color-border-strong);
  color: var(--color-text-subtle);
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  line-height: 1;
  text-transform: uppercase;
}

.reference-side-nav ul {
  display: grid;
  max-height: min(39rem, calc(100vh - 11rem));
  margin: 0;
  padding: 0;
  overflow-y: auto;
  list-style: none;
  scrollbar-width: thin;
}

.reference-side-nav li + li {
  border-top: 1px solid var(--color-border);
}

.reference-side-nav a {
  position: relative;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  gap: 0.6rem;
  align-items: center;
  min-height: 3.65rem;
  padding: 0.7rem 0.75rem;
  color: var(--color-muted);
  text-decoration: none;
}

.reference-side-nav a::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 3px;
  background: var(--color-accent);
  content: "";
  opacity: 0;
}

.reference-side-nav-number {
  color: var(--color-text-subtle);
  font-size: 0.68rem;
  font-weight: 950;
  letter-spacing: 0.06em;
}

.reference-side-nav-copy {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.reference-side-nav-copy strong {
  color: inherit;
  font-size: 0.79rem;
  font-weight: 800;
  line-height: 1.2;
}

.reference-side-nav-copy small {
  color: var(--color-text-subtle);
  font-size: 0.62rem;
  font-weight: 750;
  letter-spacing: 0.06em;
}

.reference-side-nav-arrow {
  color: var(--color-text-subtle);
  font-size: 0.95rem;
  opacity: 0;
  transform: translateX(-0.2rem);
  transition: opacity 180ms ease, transform 180ms ease;
}

.reference-side-nav a:hover,
.reference-side-nav a.is-active {
  background: var(--color-surface-muted);
  color: var(--color-text);
}

.reference-side-nav a:hover .reference-side-nav-arrow,
.reference-side-nav a.is-active .reference-side-nav-arrow,
.reference-side-nav a.is-active::before {
  opacity: 1;
}

.reference-side-nav a:hover .reference-side-nav-arrow,
.reference-side-nav a.is-active .reference-side-nav-arrow {
  transform: translateX(0);
}

.reference-side-nav a.is-active .reference-side-nav-number {
  color: var(--color-accent-dark);
}

.reference-side-nav a:focus-visible {
  z-index: 1;
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.reference-detail-content {
  width: 100%;
  max-width: 68rem;
}

.reference-detail-document-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: clamp(1.5rem, 2.5vw, 2.25rem);
}

.reference-detail-document-head .eyebrow {
  flex: 0 0 auto;
  margin: 0;
  color: var(--color-accent-dark);
}

.reference-detail-document-rule {
  width: 100%;
  height: 1px;
  background: var(--color-border-strong);
}

.reference-detail-featured {
  margin: 0;
  overflow: hidden;
  background: var(--color-surface-muted);
}

.reference-detail-featured img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.reference-detail-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  border-right: 1px solid var(--color-border-strong);
  border-bottom: 1px solid var(--color-border-strong);
}

.reference-detail-facts > div {
  min-width: 0;
  padding: 1rem;
  border-top: 1px solid var(--color-border-strong);
  border-left: 1px solid var(--color-border-strong);
  background: var(--color-surface);
}

.reference-detail-facts dt {
  margin: 0 0 0.35rem;
  color: var(--color-text-subtle);
  font-size: 0.61rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  line-height: 1.2;
  text-transform: uppercase;
}

.reference-detail-facts dd {
  margin: 0;
  color: var(--color-text);
  font-size: clamp(0.82rem, 0.9vw, 0.95rem);
  font-weight: 800;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.reference-detail-body {
  max-width: 54rem;
  margin-top: clamp(2.25rem, 4vw, 4rem);
}

.reference-detail-body > *:first-child,
.reference-story-copy > *:first-child {
  margin-top: 0;
}

.reference-detail-body > *:last-child,
.reference-story-copy > *:last-child {
  margin-bottom: 0;
}

.reference-detail-body > p:first-child {
  color: var(--color-text-soft);
  font-size: clamp(1.08rem, 1.2vw, 1.22rem);
  line-height: 1.7;
}

.reference-detail-body h2,
.reference-detail-body h3 {
  color: var(--color-text);
  font-weight: var(--font-weight-heading);
  letter-spacing: var(--tracking-title);
  line-height: 1;
}

.reference-detail-body h2 {
  margin-top: clamp(2.5rem, 4vw, 3.5rem);
  margin-bottom: 0.8rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  font-size: clamp(1.8rem, 3vw, 3.25rem);
}

.reference-detail-body h3 {
  margin-top: 2rem;
  margin-bottom: 0.65rem;
  font-size: clamp(1.3rem, 2vw, 2rem);
}

.reference-detail-body p,
.reference-detail-body li,
.reference-story-copy p,
.reference-story-copy li {
  color: var(--color-muted);
  font-size: clamp(0.98rem, 1vw, 1.08rem);
  line-height: 1.7;
}

.reference-detail-body li::marker,
.reference-story-copy li::marker {
  color: var(--color-accent-dark);
  font-weight: 800;
}

.reference-story {
  margin-top: clamp(3rem, 6vw, 6rem);
  border-top: 1px solid var(--color-border-strong);
}

.reference-story-section {
  display: grid;
  grid-template-columns: clamp(4.5rem, 8vw, 7.5rem) minmax(0, 48rem);
  gap: clamp(1.25rem, 3vw, 3rem);
  padding-block: clamp(2rem, 4vw, 3.75rem);
  border-bottom: 1px solid var(--color-border-strong);
}

.reference-story-number {
  color: var(--color-text-faint);
  font-size: var(--font-size-display-number);
  font-weight: 950;
  letter-spacing: -0.08em;
  line-height: 0.78;
}

.reference-story-section .eyebrow {
  margin: 0 0 1rem;
  color: var(--color-accent-dark);
}

.reference-gallery {
  margin-top: clamp(3.5rem, 7vw, 7rem);
}

.reference-gallery-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-strong);
}

.reference-gallery-head .eyebrow {
  margin: 0 0 0.45rem;
  color: var(--color-accent-dark);
}

.reference-gallery-head h2 {
  margin: 0;
  color: var(--color-text);
  font-size: var(--font-size-panel-title);
  font-weight: var(--font-weight-heading);
  letter-spacing: var(--tracking-title);
  line-height: 1;
}

.reference-gallery-head > span {
  color: var(--color-text-subtle);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.reference-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-border-strong);
}

.reference-gallery-link {
  display: block;
  min-width: 0;
  overflow: hidden;
  background: var(--color-surface-muted);
}

.reference-gallery-image,
.reference-gallery-link img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 220ms ease;
}

.reference-gallery-link:hover img {
  transform: scale(1.025);
}

.reference-gallery-link:focus-visible {
  position: relative;
  z-index: 1;
  outline: 3px solid var(--color-accent);
  outline-offset: -3px;
}

.reference-detail-next {
  margin-top: clamp(3rem, 5vw, 4.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border-strong);
}

.reference-detail-next a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem 1.5rem;
  align-items: end;
  color: var(--color-text);
  text-decoration: none;
}

.reference-detail-next-label {
  grid-column: 1 / -1;
  color: var(--color-text-subtle);
  font-size: var(--font-size-kicker);
  font-weight: 900;
  letter-spacing: var(--tracking-kicker);
  text-transform: uppercase;
}

.reference-detail-next strong {
  max-width: 48rem;
  font-size: clamp(1.45rem, 2.6vw, 2.65rem);
  font-weight: var(--font-weight-heading);
  letter-spacing: var(--tracking-title);
  line-height: 1;
  transition: color 180ms ease;
}

.reference-detail-next-arrow {
  color: var(--color-text-subtle);
  font-size: 1.9rem;
  line-height: 1;
  transition: color 180ms ease, transform 180ms ease;
}

.reference-detail-next a:hover strong,
.reference-detail-next a:hover .reference-detail-next-arrow {
  color: var(--color-accent-dark);
}

.reference-detail-next a:hover .reference-detail-next-arrow {
  transform: translateX(0.3rem);
}

.reference-contact-section {
  border-top: 1px solid var(--color-border-inverse);
  padding-block: clamp(3rem, 5vw, 5rem);
  background: var(--section-dark-soft-bg);
}

.reference-contact-cta {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.reference-contact-cta .eyebrow {
  color: var(--color-accent);
}

.reference-contact-cta h2 {
  max-width: 54rem;
  margin: 0;
  color: var(--color-inverse);
  font-size: var(--font-size-cta-title);
  font-weight: var(--font-weight-display);
  letter-spacing: var(--tracking-display);
  line-height: var(--line-height-display);
}

.reference-contact-cta .btn-primary {
  flex: 0 0 auto;
}

.reference-contact-cta .btn-primary span {
  margin-left: 0.5rem;
}

@media (max-width: 1100px) {
  .reference-detail-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .reference-detail-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .reference-detail-sidebar {
    position: static;
  }

  .reference-side-nav ul {
    display: flex;
    max-height: none;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-inline: contain;
  }

  .reference-side-nav li {
    flex: 0 0 min(17rem, 78vw);
  }

  .reference-side-nav li + li {
    border-top: 0;
    border-left: 1px solid var(--color-border);
  }

  .reference-side-nav a {
    min-height: 4rem;
  }
}

@media (max-width: 680px) {
  .reference-detail-section {
    padding-block: 2.4rem;
  }

  .reference-detail-layout {
    gap: 2rem;
  }

  .reference-detail-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .reference-story-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.15rem;
  }

  .reference-story-number {
    font-size: clamp(3rem, 18vw, 5rem);
  }

  .reference-gallery-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .reference-detail-next strong {
    font-size: clamp(1.35rem, 7vw, 2rem);
  }

  .reference-contact-cta {
    display: grid;
    align-items: start;
  }

  .reference-contact-cta .btn-primary {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reference-side-nav-arrow,
  .reference-gallery-link img,
  .reference-detail-next-arrow {
    transition: none;
  }
}