/* cases/case-shell.css, extends styles.css for case-study layouts */

/* ─── Case Hero ──────────────────────────────────────────────────────────── */

.case-hero {
  background: #0A0A0A;
  color: #F2F0EC;
  padding-top: calc(var(--pad-y) * 0.85);
  padding-bottom: calc(var(--pad-y) * 0.55);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}
.case-hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 56px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(242, 240, 236, 0.65);
  transition: color var(--t-fast) var(--ease), gap var(--t-fast) var(--ease);
}
.back-link:hover { color: var(--accent); gap: 14px; }
.back-link span { display: inline-block; transition: transform var(--t-fast) var(--ease); }
.back-link:hover span { transform: translateX(-3px); }

.case-hero .eyebrow {
  color: rgba(242, 240, 236, 0.65);
}
.case-title {
  font-size: clamp(40px, 5.6vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 600;
  color: #F2F0EC;
  max-width: 22ch;
}
.case-sub {
  font-size: clamp(18px, 1.7vw, 22px);
  line-height: 1.45;
  color: rgba(242, 240, 236, 0.78);
  max-width: 60ch;
  margin-top: 28px;
  font-weight: 400;
}

/* Cover */
.case-cover-wrap { padding: 0; }
.case-cover {
  margin-top: 64px;
  background: #1A1A1A;
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  padding: 6%;
}
.case-cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* Hero 3-up gallery */
.case-hero-gallery {
  margin-top: var(--pad-x);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.case-hero-gallery-cell {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #1A1A1A;
  border-radius: 0;
}
.case-hero-gallery-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1.2s var(--ease-out);
}
.case-hero-gallery-cell:hover img { transform: scale(1.04); }
@media (max-width: 880px) {
  .case-hero-gallery { grid-template-columns: 1fr; }
}

/* Meta strip */
.case-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  border-left: 1px solid rgba(255, 255, 255, 0.10);
}
.case-meta-item {
  padding: 20px 24px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.10);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 110px;
}
.case-meta-label {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(242, 240, 236, 0.5);
}
.case-meta-item p {
  font-size: 15px;
  color: #F2F0EC;
  line-height: 1.4;
}

/* ─── Section structure ─────────────────────────────────────────────────── */

.case-main {
  padding: calc(var(--pad-y) * 0.4) 0;
}

.case-section {
  padding: calc(var(--pad-y) * 0.55) 0;
  border-top: 1px solid var(--rule);
}
.case-section:first-child { border-top: 0; }

.case-section-head {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  align-items: baseline;
  margin-bottom: 36px;
}
.case-section-n {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 500;
}
.case-section-head h2 {
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.022em;
  font-weight: 600;
  text-wrap: balance;
}

.case-section-body {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
}
.case-section-body > * { grid-column: 2; }

.case-p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-soft);
  max-width: 64ch;
}
.case-p + .case-p { margin-top: 18px; }
.case-lede { color: var(--muted); max-width: 70ch; margin-bottom: 36px; }
.case-closing { color: var(--fg-soft); max-width: 70ch; margin-top: 40px; font-size: 17px; line-height: 1.6; }

.case-bullets {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 70ch;
}
.case-bullets li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--rule);
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--fg-soft);
  counter-increment: cb;
}
.case-bullets { counter-reset: cb; }
.case-bullets li::before {
  content: counter(cb, decimal-leading-zero);
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.06em;
  color: var(--accent);
  padding-top: 3px;
}

/* ─── Image grids ───────────────────────────────────────────────────────── */

.case-image-grid {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 56px;
  grid-column: 1 / -1;
  max-width: none;
}
.case-image-grid.cols-2,
.case-image-grid.cols-3 {
  display: grid;
  gap: 32px;
}
.case-image-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.case-image-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.case-image-grid.cols-2 .case-image.wide,
.case-image-grid.cols-3 .case-image.wide { grid-column: 1 / -1; }

.case-image.narrow {
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}
.case-image.narrow .case-image-frame {
  padding: clamp(32px, 5%, 64px);
}

@media (max-width: 720px) {
  .case-image-grid.cols-2,
  .case-image-grid.cols-3 { grid-template-columns: 1fr; }
}

.case-image {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.case-image-frame {
  position: relative;
  overflow: hidden;
  background: #FFFFFF;
  border: 0;
  border-radius: 2px;
  padding: clamp(64px, 10%, 140px) clamp(80px, 12%, 180px);
  display: block;
}
[data-dark="1"] .case-image-frame {
  background: #FFFFFF;
}
.case-image-frame img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 1s var(--ease-out);
}
.case-image:hover .case-image-frame img { transform: scale(1.02); }

.case-image figcaption {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.case-image-wide .case-image-frame { padding: 0; background: transparent; border: 0; }
.case-image-wide .case-image-frame img { width: 100%; height: auto; }

/* ─── KPIs ──────────────────────────────────────────────────────────────── */

.case-kpis {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.case-kpi {
  padding: 28px 28px 32px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 180px;
}
.case-kpi-label {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.case-kpi-label::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 10px;
  vertical-align: middle;
}
.case-kpi-value {
  font-size: clamp(28px, 2.6vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.022em;
  font-weight: 600;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}
.case-kpi-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  margin-top: auto;
}

/* ─── Principles ────────────────────────────────────────────────────────── */

.case-principles {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.case-principle {
  padding: 24px 22px 28px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 200px;
}
.case-principle-n {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 500;
}
.case-principle h4 {
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -0.012em;
  font-weight: 600;
}
.case-principle p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  margin-top: auto;
}

/* ─── Callout ───────────────────────────────────────────────────────────── */

.case-callout-wrap { padding: calc(var(--pad-y) * 0.4) 0; border-top: 0; }
.case-callout {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 40px 36px 44px;
  background: var(--bg-2);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
  max-width: none;
}
.case-callout-tag {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}
.case-callout h3 {
  font-size: clamp(22px, 2vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 600;
  grid-column: 2;
  margin-top: -3px;
}
.case-callout p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg-soft);
  max-width: 60ch;
  grid-column: 2;
  margin-top: 14px;
}

.case-callout.ai          { border-left-color: var(--accent); }
.case-callout.placeholder { border-left-color: var(--faint); }
.case-callout.placeholder .case-callout-tag { color: var(--muted); }

/* ─── Next/prev ─────────────────────────────────────────────────────────── */

.case-next {
  padding: calc(var(--pad-y) * 0.8) 0 calc(var(--pad-y) * 0.5);
  border-top: 1px solid var(--rule);
}
.case-next-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-lg);
}
.case-next-card {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--bg);
  color: inherit;
  transition: all var(--t-fast) var(--ease);
  align-items: center;
}
.case-next-card:hover {
  border-color: var(--accent);
  background: var(--bg-2);
  transform: translateY(-2px);
}
.case-next-card.prev { grid-template-columns: 1fr 0.7fr; }
.case-next-card.prev .case-next-img { order: 2; }
.case-next-card.prev .case-next-meta { order: 1; text-align: right; }
.case-next-img {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--bg-2);
  border-radius: 2px;
  display: grid;
  place-items: center;
  padding: 14px;
}
.case-next-img img {
  width: 100%; height: 100%; object-fit: contain;
}
.case-next-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case-next-dir {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}
.case-next-company {
  font-family: var(--mono);
  font-size: var(--t-label);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.case-next-card h4 {
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -0.012em;
  font-weight: 600;
}

/* ─── Responsive ────────────────────────────────────────────────────────── */

@media (max-width: 1000px) {
  .case-kpis       { grid-template-columns: repeat(2, 1fr); }
  .case-principles { grid-template-columns: repeat(2, 1fr); }
  .case-meta       { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .case-hero-top { flex-direction: column; align-items: flex-start; gap: 14px; margin-bottom: 32px; }
  .case-section-head { grid-template-columns: 1fr; gap: 8px; }
  .case-section-body { grid-template-columns: 1fr; }
  .case-section-body > * { grid-column: 1; }
  .case-image-frame { padding: 14px; }
  .case-kpis       { grid-template-columns: 1fr; }
  .case-principles { grid-template-columns: 1fr; }
  .case-meta       { grid-template-columns: 1fr; }
  .case-callout    { grid-template-columns: 1fr; padding: 28px 22px; }
  .case-callout h3, .case-callout p { grid-column: 1; }
  .case-next-grid { grid-template-columns: 1fr; }
  .case-next-card,
  .case-next-card.prev { grid-template-columns: 1fr; }
  .case-next-card.prev .case-next-img    { order: 1; }
  .case-next-card.prev .case-next-meta   { order: 2; text-align: left; }
}

/* Dark mode adjustments for case body */
[data-dark="1"] .case-callout {
  background: var(--bg-2);
}
[data-dark="1"] .case-next-card {
  background: var(--bg-2);
}