/* ============================================================
   Component · Project Case Study Page
   Used by src/_layouts/project.erb
   ============================================================ */

/* === 1. HERO =============================================== */

.case-hero {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-surface);
  overflow: hidden;
  isolation: isolate;
}
@media (max-width: 639px) {
  .case-hero { aspect-ratio: 4 / 3; }
}

.case-hero__placeholder-bg {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 24px,
    rgba(24, 33, 37, 0.04) 24px,
    rgba(24, 33, 37, 0.04) 25px
  );
}

.case-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-hero__placeholder-chip {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 4px 10px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.case-hero__placeholder-chip::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
}

.case-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(24, 33, 37, 0.78));
  z-index: 3;
}

.case-hero__meta {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 4;
  padding-bottom: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.case-hero__breadcrumbs {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}
.case-hero__breadcrumbs a {
  color: inherit;
  text-decoration: none;
}
.case-hero__breadcrumbs a:hover { color: rgba(255, 255, 255, 0.9); }
.case-hero__breadcrumbs .sep { margin-inline: 0.5em; }

.case-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  line-height: 1.0;
  letter-spacing: -0.025em;
  color: var(--color-white);
}

.case-hero__tagline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
}
.case-hero__tagline span + span::before {
  content: '·';
  margin-right: var(--space-md);
  color: rgba(255, 255, 255, 0.3);
}

/* === 2. BRIEF + PROJECT DATA ================================ */

.case-brief {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl) var(--grid-gutter);
  padding-block: var(--space-3xl);
}
@media (max-width: 767px) {
  .case-brief { grid-template-columns: 1fr; }
}

.case-brief__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.case-brief__text {
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-ink);
  max-width: 52ch;
}

.case-data-table {
  display: flex;
  flex-direction: column;
}

.case-data-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  padding-block: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}
.case-data-row:first-child { border-top: 1px solid var(--color-border); }

.case-data-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  flex-shrink: 0;
}

.case-data-value {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  text-align: right;
}

/* === 3. DARK DIVIDER ======================================== */

.case-divider {
  padding-block: var(--space-2xl);
  text-align: center;
}

.case-divider__stat {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

/* === 4. SECTION HEADERS (approach, model, outcome) ========= */

/* Centred monument treatment — the eyebrow riding a full-width rule, the
   centring, the hairline draw-on-reveal and the dark-section variant all
   come from layout.css · .monument-header. Only the case-study departures
   live here. Qualified with .monument-header so these win on specificity
   rather than source order, matching service-pillar.css. */

/* Case studies close the header with a second hairline, so each one reads
   as a framed title block rather than an open rule. The extra bottom space
   accounts for that closing rule. */
.case-section-header.monument-header {
  display: flex;
  flex-direction: column;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-2xl);
}

/* Tighter, wider-tracked than the global .eyebrow — same spec the pillar
   sections use, so section labels read identically across both templates. */
.case-section-num {
  font-size: 10px;
  letter-spacing: 0.2em;
}

.case-section-title {
  max-width: 26ch;
  margin-inline: auto;
  text-wrap: balance;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--color-ink);
}

/* === 5. APPROACH =========================================== */

.case-approach__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 65ch;
  margin-bottom: var(--space-2xl);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-ink);
}

.case-approach__images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--grid-gutter);
}
@media (max-width: 639px) {
  .case-approach__images { grid-template-columns: 1fr; }
}

.case-approach__image-slot {
  position: relative;
  aspect-ratio: 3 / 2;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.case-approach__slot-bg {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 24px,
    rgba(24, 33, 37, 0.04) 24px,
    rgba(24, 33, 37, 0.04) 25px
  );
}

.case-approach__image-slot img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-approach__slot-label {
  position: absolute;
  bottom: var(--space-md);
  left: var(--space-md);
  padding: 3px 8px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

/* === 6. 3D MODEL VIEWER ==================================== */

.case-model__viewer {
  display: block;
  width: 100%;
  height: 480px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.case-model__placeholder {
  position: relative;
  width: 100%;
  height: 480px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.case-model__placeholder-bg {
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 24px,
    rgba(24, 33, 37, 0.04) 24px,
    rgba(24, 33, 37, 0.04) 25px
  );
}

.case-model__placeholder-label {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 4px 10px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.case-model__placeholder-label::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
}

/* === 7. OUTCOME ============================================ */

.case-metrics {
  list-style: none;
  counter-reset: metric;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 56ch;
  margin-bottom: var(--space-2xl);
}

.case-metrics li {
  counter-increment: metric;
  display: flex;
  gap: var(--space-lg);
  align-items: baseline;
  padding-block: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-ink);
}
.case-metrics li:first-child { border-top: 1px solid var(--color-border); }

.case-metrics li::before {
  content: counter(metric, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  flex-shrink: 0;
  min-width: 2ch;
}

.case-quote {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  line-height: 1.3;
  color: var(--color-ink);
  max-width: 44ch;
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-accent);
  margin-top: var(--space-2xl);
}

/* === 8. RELATED + CTA ====================================== */

.case-footer {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--grid-gutter);
  padding-block: var(--space-3xl);
  border-top: 1px solid var(--color-border);
}
@media (max-width: 767px) {
  .case-footer { grid-template-columns: 1fr; }
}

.case-related__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.case-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl) var(--grid-gutter);
}
@media (max-width: 767px) {
  .case-related__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 479px) {
  .case-related__grid { grid-template-columns: 1fr; }
}

.case-cta {
  background: var(--color-ink);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.case-cta__eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

.case-cta__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1.15;
  color: var(--color-white);
  flex: 1;
}
.case-cta__title em { font-style: italic; }

.case-cta__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
  transition: gap var(--duration-fast) var(--ease-out);
}
.case-cta__link:hover { gap: var(--space-md); }