/* ============================================================
   Component · Service Pillar (detail page)
   Problem → Approach → Deliverables → Tools → Related case → CTA
   ============================================================ */

.pillar-section {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--color-border);
  position: relative;
}
.pillar-section__header {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
@media (min-width: 768px) {
  .pillar-section__header {
    grid-template-columns: auto 1fr;
    gap: var(--space-2xl);
    align-items: baseline;
  }
}
.pillar-section__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  align-self: start;
  white-space: nowrap;
}
.pillar-section__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.pillar-section__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
@media (min-width: 1024px) {
  .pillar-section__body { grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr); gap: var(--space-2xl); }
}

.pillar-section__copy { font-size: var(--text-base); color: var(--color-ink-light); }
.pillar-section__copy p { max-width: 56ch; }

/* Numbered approach steps */
.steps { display: flex; flex-direction: column; gap: 0; counter-reset: step; border-top: 1px solid var(--color-border); }
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
  counter-increment: step;
}
.step__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.step__num::before { content: 'Step 0' counter(step); }
.step__title { font-family: var(--font-body); font-weight: 600; font-size: var(--text-base); color: var(--color-ink); margin-bottom: 4px; }
.step__desc  { font-size: var(--text-sm); color: var(--color-ink-light); max-width: 50ch; }

/* Deliverables grid */
.deliverables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}
@media (min-width: 768px) { .deliverables { grid-template-columns: repeat(3, 1fr); } }

.deliverable {
  padding: var(--space-lg);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  background: var(--color-white);
  transition: background var(--duration-fast) var(--ease-out);
}
.deliverable:hover { background: var(--color-surface); }
.deliverable__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-sm);
}
.deliverable__title { font-family: var(--font-body); font-weight: 600; font-size: var(--text-base); color: var(--color-ink); margin-bottom: 4px; }
.deliverable__desc  { font-size: var(--text-xs); color: var(--color-ink-muted); line-height: 1.5; }

/* Tools & standards row */
.tools-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.tool-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  background: var(--color-white);
}

/* Pillar nav (Prev / Next pillar) */
.pillar-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--color-border);
}
.pillar-nav__item {
  padding: var(--space-lg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  background: var(--color-white);
  transition: background var(--duration-fast) var(--ease-out);
}
.pillar-nav__item:last-child { border-right: none; align-items: flex-end; text-align: right; }
.pillar-nav__item:hover { background: var(--color-surface); }
.pillar-nav__dir { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-ink-muted); }
.pillar-nav__title { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-ink); }

/* ============================================================
   Pillar pages — motion & interactivity
   The same vocabulary as /services/: a rule that draws under each
   section head, cards that cascade in, leader lines on hover, and
   mono fields that illuminate left-to-right.
   ============================================================ */

/* --- Section head: monument treatment -------------------------
   The section number rides a full-width centred rule with the title
   below it (layout.css · .monument-header). Overrides the two-column
   header grid — specificity, not source order, so the page's CSS
   load order stays irrelevant. */
.pillar-section__header.monument-header {
  display: flex;
  flex-direction: column;
}
@media (min-width: 768px) {
  .pillar-section__header.monument-header { grid-template-columns: none; }
}
/* The eyebrow's flanking rules need the full row to divide; the
   default header pins the number to the start of its column. */
.pillar-section__header.monument-header .pillar-section__num {
  align-self: stretch;
  justify-content: center;
}
.pillar-section__header.monument-header .pillar-section__title {
  max-width: 26ch;
  margin-inline: auto;
  text-wrap: balance;
}

/* The hairline draw on reveal belongs to .monument-header itself
   (layout.css) — shared with /services/ and the homepage. */

/* --- Approach steps: leader line + accent index on hover -------- */
.step {
  position: relative;
  transition: background var(--duration-fast) var(--ease-out);
}
.step::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: center top;
  transition: transform var(--duration-normal) var(--ease-out);
}
.step:hover::before { transform: scaleY(1); }
.step:hover {
  background: color-mix(in srgb, var(--color-accent) 4%, transparent);
}
.step__num { transition: color var(--duration-fast) var(--ease-out); }
.step:hover .step__num { color: var(--color-accent); }
.step__title { transition: transform var(--duration-normal) var(--ease-out); }
.step:hover .step__title { transform: translateX(4px); }

/* Staggered entry, matching the pillar cards on /services/ */
.step[data-reveal] {
  opacity: 0;
  transform: translateX(-12px);
  transition:
    opacity var(--duration-slow) var(--ease-out) calc(var(--stagger-i, 0) * 80ms),
    transform var(--duration-slow) var(--ease-out) calc(var(--stagger-i, 0) * 80ms),
    background var(--duration-fast) var(--ease-out);
}
.step[data-reveal].is-visible { opacity: 1; transform: translateX(0); }

/* --- Deliverable cards: CAD viewport + cascade ------------------ */
.deliverable {
  --cad-inset: 8px;
  --cad-len: 12px;
  overflow: hidden;
}
.deliverable > *:not(.cad) { position: relative; z-index: 2; }

/* Top stripe marks the card, the way the service cards are marked */
.deliverable::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--duration-normal) var(--ease-out);
  z-index: 1;
}
.deliverable:hover::before { transform: scaleX(1); }

/* Pointer-tracked wash, fed by --mx/--my from card-cad.js */
.deliverable::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mx, 50%) var(--my, 50%),
    color-mix(in srgb, var(--color-accent) 10%, transparent) 0%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
  pointer-events: none;
  z-index: 0;
}
.deliverable:hover::after { opacity: 1; }

.deliverable__num { transition: color var(--duration-fast) var(--ease-out); }
.deliverable:hover .deliverable__num { color: var(--color-accent); }

.deliverable[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--duration-slow) var(--ease-out) calc(var(--stagger-i, 0) * 70ms),
    transform var(--duration-slow) var(--ease-out) calc(var(--stagger-i, 0) * 70ms),
    background var(--duration-fast) var(--ease-out);
}
.deliverable[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* --- Tool chips: the spec row powers on, left to right ---------- */
.tool-chip {
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}
.tools-list:hover .tool-chip {
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
}
.tools-list:hover .tool-chip:nth-child(1) { transition-delay:   0ms; }
.tools-list:hover .tool-chip:nth-child(2) { transition-delay:  45ms; }
.tools-list:hover .tool-chip:nth-child(3) { transition-delay:  90ms; }
.tools-list:hover .tool-chip:nth-child(4) { transition-delay: 135ms; }
.tools-list:hover .tool-chip:nth-child(5) { transition-delay: 180ms; }
/* The chip actually under the pointer goes the whole way. Needs to
   out-specify the row rule above, which also matches it. */
.tools-list:hover .tool-chip:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  transition-delay: 0ms;
}

/* --- Prev / next pillar: brackets + the title slides toward it --- */
.pillar-nav__item {
  position: relative;
  --cad-inset: 8px;
  --cad-len: 12px;
}
.pillar-nav__item > *:not(.cad) { position: relative; z-index: 2; }
.pillar-nav__dir,
.pillar-nav__title {
  transition:
    transform var(--duration-normal) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}
.pillar-nav__item:hover .pillar-nav__dir { color: var(--color-accent); }
.pillar-nav__item:first-child:hover .pillar-nav__dir,
.pillar-nav__item:first-child:hover .pillar-nav__title { transform: translateX(-5px); }
.pillar-nav__item:last-child:hover .pillar-nav__dir,
.pillar-nav__item:last-child:hover .pillar-nav__title { transform: translateX(5px); }

@media (prefers-reduced-motion: reduce) {
  .step::before,
  .deliverable::before,
  .deliverable::after,
  .step__title,
  .pillar-nav__dir,
  .pillar-nav__title { transition: none; }
  .step[data-reveal],
  .deliverable[data-reveal] {
    opacity: 1;
    transform: none;
    transition: background var(--duration-fast) var(--ease-out);
  }
  .tool-chip { transition: none; }
  .tools-list:hover .tool-chip { transition-delay: 0ms; }
}