/* ============================================================
   Codex case study page
   Reuses codex-home.css for masthead, footer, pills, snapshot.
   Bands alternate light/black for editorial pacing.
   ============================================================ */

/* ===== Shared band container ===== */
.band {
  padding: clamp(64px, 9vw, 128px) var(--gutter);
  border-bottom: 1px solid var(--c-line);
}

.band__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: clamp(32px, 4vw, 48px);
}


/* ===== Case header ===== */
.case-header {
  padding: clamp(48px, 7vw, 96px) var(--gutter) clamp(32px, 5vw, 56px);
}

.case-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--s-24);
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding: 6px 14px;
  border: 1px solid var(--c-faint);
  border-radius: var(--r-pill);
  margin-bottom: var(--s-16);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.back:hover {
  color: var(--c-invert);
  background: var(--c-text);
  border-color: var(--c-text);
}

.case-header__title {
  font-size: clamp(40px, 7vw, 96px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--c-text);
  max-width: 1100px;
}

.case-header__sub {
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 300;
  line-height: 1.5;
  color: var(--c-text);
  max-width: 720px;
}

.case-header__meta {
  margin: var(--s-16) 0 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  padding: 20px 0;
  white-space: normal;
  justify-content: flex-start;
  gap: 12px 40px;
  max-width: none;
  width: 100%;
}

/* ===== Hero image — contained, image-card radius ===== */
.case-hero {
  padding: 0 var(--gutter) clamp(48px, 7vw, 80px);
}

.case-hero__inner {
  max-width: 1200px;
  margin: 0 auto;
}

.case-hero img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-card);
  border: 1px solid var(--c-faint);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* ===== Section headings + prose ===== */
.section__title {
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-text);
  max-width: 900px;
}

.prose {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
  max-width: 720px;
}

.prose p {
  font-size: 17px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--c-text);
}

.prose .lede,
.lede {
  font-size: 22px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--c-text);
}

/* ===== Case figure ===== */
.case-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}

.case-figure img {
  display: block;
  width: 100%;
  border-radius: var(--r-card);
  border: 1px solid var(--c-faint);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.case-figure figcaption {
  font-size: 13px;
  color: var(--c-muted);
  font-style: normal;
  letter-spacing: 0.01em;
  max-width: 640px;
}

.case-figure--inset img {
  max-width: 960px;
  margin: 0 auto;
}

/* ===== Stat grid ===== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.stat-grid li {
  padding: var(--s-32) var(--s-16) var(--s-32) 0;
  border-right: 1px solid var(--c-line);
}

.stat-grid li:last-child { border-right: none; padding-right: 0; }
.stat-grid li:not(:first-child) { padding-left: var(--s-32); }

.stat-grid__num {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-text);
  margin-bottom: var(--s-12);
}

.stat-grid__label {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--c-muted);
}

.stat-grid__label span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  font-weight: 400;
  color: var(--c-muted);
  letter-spacing: 0;
}

/* ===== Priority list ===== */
.priority-list {
  display: flex;
  flex-direction: column;
}

.priority-list {
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.priority-list li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--s-32);
  align-items: baseline;
  padding: var(--s-24) 0;
  border-bottom: 1px solid var(--c-faint);
}
.priority-list li:last-child { border-bottom: none; }

.priority-list__num {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
  align-self: center;
}

.priority-list__head {
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin-bottom: 4px;
}

.priority-list__count {
  font-size: 14px;
  color: var(--c-muted);
}

/* ===== Ship (done / next) ===== */
.ship {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-48);
}

.ship__col {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
  border-top: 1px solid var(--c-line);
  padding-top: var(--s-24);
}

.ship__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.ship__list {
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}

.ship__list li {
  font-size: 16px;
  line-height: 1.55;
  padding-left: var(--s-16);
  position: relative;
}

.ship__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--c-text);
}

/* ===== Pull quote (industry / inline) ===== */
.quote {
  margin: 0;
  padding: var(--s-24) 0;
  border-top: 2px solid var(--c-text);
  border-bottom: 1px solid var(--c-faint);
  max-width: 900px;
}

.quote p {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--c-text);
  margin-bottom: var(--s-12);
}

.quote cite {
  font-size: 12px;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.quote cite a {
  color: inherit;
  border-bottom: 1px solid var(--c-faint);
}
.quote cite a:hover { color: var(--c-text); border-color: var(--c-text); }

/* ===== Feature grid (date + image + status) ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.feature-grid__item {
  padding: var(--s-24) var(--s-16) var(--s-24) 0;
  border-right: 1px solid var(--c-line);
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}

.feature-grid__item:last-child { border-right: none; padding-right: 0; }
.feature-grid__item:not(:first-child) { padding-left: var(--s-24); }

.feature-grid__date {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.feature-grid__head {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--c-text);
  min-height: 40px;
}

.feature-grid__media {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--c-faint);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-grid__media img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-grid__status {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding-left: var(--s-16);
  position: relative;
  margin-top: auto;
}

.feature-grid__status::before {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 14px;
  line-height: 1.2;
}

.feature-grid__status--yes { color: var(--c-text); }
.feature-grid__status--yes::before { content: "✓"; }
.feature-grid__status--no { color: var(--c-muted); }
.feature-grid__status--no::before { content: "✗"; }

/* ===== Pillars (two columns of insight + quote) ===== */
.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-32);
}

.pillars--2 {
  grid-template-columns: 1fr 1fr;
}

.pillars--3 {
  grid-template-columns: repeat(3, 1fr);
}

.pillar {
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
  padding-top: var(--s-24);
  border-top: 1px solid var(--c-line);
}

.pillar__num {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.pillar__title {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin-bottom: var(--s-4);
}

.pillar__body {
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
}

.pillar__list {
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
  margin: 0;
}

.pillar__list li {
  font-size: 15px;
  line-height: 1.55;
  color: var(--c-text);
  padding-left: var(--s-16);
  position: relative;
}

.pillar__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--c-text);
}

.pillar__quote {
  margin: 0;
  padding-left: var(--s-16);
  border-left: 2px solid var(--c-text);
}

.pillar__quote p {
  font-size: 14px;
  font-style: italic;
  line-height: 1.55;
  color: var(--c-muted);
}

/* ===== Research stack (full-width single-column figures) ===== */
.research-grid {
  display: flex;
  flex-direction: column;
  gap: clamp(32px, 4vw, 56px);
}

.research-grid--2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-32);
}

.research-grid__item {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}

.research-grid__item img {
  width: 100%;
  height: auto;
  border-radius: var(--r-card);
  border: 1px solid var(--c-faint);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.research-grid__item figcaption {
  font-size: 13px;
  color: var(--c-muted);
}

.research-grid__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin: 0;
}

/* ===== Comparison (multiple discrete cart screens, each its own card) ===== */
.comparison {
  display: grid;
  gap: var(--s-24);
  justify-content: center;
}

.comparison--2 { grid-template-columns: repeat(2, minmax(0, 280px)); }
.comparison--3 { grid-template-columns: repeat(3, minmax(0, 280px)); }

.comparison__item {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}

.comparison__item img {
  width: 100%;
  height: auto;
  border-radius: var(--r-card);
  border: 1px solid var(--c-faint);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  display: block;
}

.comparison__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin: 0;
}

.comparison__caption {
  margin: var(--s-12) 0 0;
  font-size: 13px;
  color: var(--c-muted);
}

@media (max-width: 768px) {
  .comparison--3, .comparison--2 { grid-template-columns: 1fr; gap: var(--s-16); }
}

/* ===== Case figure labels (Before/After, Control/Variant, etc.) ===== */
.case-figure__labels {
  display: grid;
  margin: 0 0 var(--s-12);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.case-figure__labels--2 { grid-template-columns: 1fr 1fr; }
.case-figure__labels--3 { grid-template-columns: 1fr 1fr 1fr; }

.case-figure__labels span {
  text-align: center;
}

/* ===== Zoomable images ===== */
img.is-zoomable {
  cursor: zoom-in;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

img.is-zoomable:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* ===== Codex lightbox ===== */
.codex-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.codex-lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.codex-lightbox__scroll {
  position: absolute;
  inset: 0;
  overflow: auto;
  padding: 80px var(--gutter) 80px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  cursor: zoom-out;
}

.codex-lightbox__img {
  max-width: 100%;
  width: auto;
  height: auto;
  display: block;
  border-radius: var(--r-card);
  cursor: default;
  background: var(--c-faint);
}

.codex-lightbox__close {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1001;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-invert);
  background: transparent;
  border: 1px solid var(--c-invert);
  border-radius: var(--r-pill);
  padding: 8px 18px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.codex-lightbox__close:hover {
  background: var(--c-invert);
  color: var(--c-text);
}

@media (max-width: 768px) {
  .codex-lightbox__scroll { padding: 64px 16px 64px; }
  .codex-lightbox__close { top: 16px; right: 16px; padding: 6px 14px; font-size: 11px; }
}

/* ===== Bottom navigation ===== */
.case-bottom-nav {
  padding: clamp(48px, 7vw, 80px) var(--gutter);
  border-bottom: 1px solid var(--c-line);
}

.case-bottom-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-24);
}

.case-bottom-nav .back,
.case-bottom-nav .next {
  margin-bottom: 0;
}

.next {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text);
  padding: 8px 16px;
  border: 1px solid var(--c-text);
  border-radius: var(--r-pill);
  transition: background 0.15s ease, color 0.15s ease;
}

.next:hover {
  background: var(--c-text);
  color: var(--c-invert);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .stat-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-grid li:nth-child(2) { border-right: none; padding-right: 0; }
  .stat-grid li:nth-child(3) {
    border-top: 1px solid var(--c-line);
    padding-left: 0;
    padding-right: var(--s-16);
    border-right: 1px solid var(--c-line);
  }
  .stat-grid li:nth-child(4) {
    border-top: 1px solid var(--c-line);
    padding-left: var(--s-32);
  }

  .ship { grid-template-columns: 1fr; gap: var(--s-32); }

  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid__item:nth-child(2) { border-right: none; padding-right: 0; }
  .feature-grid__item:nth-child(3),
  .feature-grid__item:nth-child(4) {
    border-top: 1px solid var(--c-line);
  }
  .feature-grid__item:nth-child(3) { padding-left: 0; padding-right: var(--s-24); border-right: 1px solid var(--c-line); }
  .feature-grid__item:nth-child(4) { padding-left: var(--s-24); }

  .pillars--2 { grid-template-columns: 1fr; gap: var(--s-24); }
  .pillars--3 { grid-template-columns: 1fr; gap: var(--s-24); }
}

@media (max-width: 768px) {
  .case-header__title { font-size: clamp(36px, 10vw, 56px); }
  .case-header__sub { font-size: 17px; }

  .priority-list li {
    grid-template-columns: 56px 1fr;
    gap: var(--s-16);
    padding: var(--s-16) 0;
  }

  .case-bottom-nav__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-16);
  }

  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid__item,
  .feature-grid__item:nth-child(2),
  .feature-grid__item:nth-child(3),
  .feature-grid__item:nth-child(4) {
    border-right: none;
    padding-left: 0;
    padding-right: 0;
  }
  .feature-grid__item:not(:first-child) {
    border-top: 1px solid var(--c-line);
  }

  .research-grid { gap: var(--s-24); }
  .research-grid--2col { grid-template-columns: 1fr; gap: var(--s-24); }
}