/*
  Applied 3PL Systems — Case Study detail page styles
  Loaded after styles.css; reuses design tokens defined there.
*/

/*---------------------------------------
  PAGE SHELL
-----------------------------------------*/
.cs-page main {
  padding-bottom: 0;
}

.cs-container {
  max-width: 880px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 3vw, 2rem);
}

/*---------------------------------------
  HERO
-----------------------------------------*/
.cs-hero {
  padding-top: clamp(5rem, 8vw, 8rem);
  padding-bottom: clamp(2.5rem, 4vw, 4rem);
  background: var(--cream);
}

.cs-hero-eyebrow {
  font-family: var(--mono-font-family);
  font-size: var(--eyebrow-font-size);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral-deep);
  font-weight: var(--font-weight-medium);
  margin-bottom: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.cs-hero-eyebrow .cs-hero-eyebrow-divider {
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--coral);
}

.cs-hero-title {
  font-family: var(--header-font-family);
  font-size: clamp(2rem, 3vw + 1rem, 3.5rem);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink);
  margin: 0 0 1.5rem 0;
  max-width: 22ch;
}

.cs-hero-lede {
  font-size: var(--p-lead);
  line-height: 1.5;
  color: var(--steel);
  margin: 0 0 2.5rem 0;
  max-width: 60ch;
  font-style: italic;
  border-left: 3px solid var(--coral);
  padding-left: 1.25rem;
}

.cs-meta-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cs-meta-label {
  font-family: var(--mono-font-family);
  font-size: var(--mono-font-size);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel-light);
  font-weight: var(--font-weight-medium);
}

.cs-meta-value {
  font-size: 1rem;
  line-height: 1.45;
  color: var(--ink-soft);
  margin: 0;
}

/*---------------------------------------
  HERO IMAGE
-----------------------------------------*/
.cs-hero-image-wrap {
  padding-bottom: clamp(3rem, 5vw, 5rem);
  background: var(--cream);
}

.cs-hero-image {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--rule);
  border-radius: var(--border-radius-default);
  background: var(--cream-warm);
}

/*---------------------------------------
  CONTENT SECTIONS
-----------------------------------------*/
.cs-section {
  padding-block: clamp(2rem, 4vw, 3.5rem);
}

.cs-section + .cs-section {
  padding-top: 0;
}

.cs-section-label {
  font-family: var(--mono-font-family);
  font-size: var(--mono-font-size);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral-deep);
  font-weight: var(--font-weight-medium);
  margin-bottom: 1rem;
  display: block;
}

.cs-section h2 {
  font-family: var(--header-font-family);
  font-size: clamp(1.5rem, 1.5vw + 1rem, 2.25rem);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 1.5rem 0;
  max-width: 28ch;
}

.cs-section p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0 0 1.25rem 0;
  max-width: 68ch;
}

.cs-section p:last-child {
  margin-bottom: 0;
}

/*---------------------------------------
  AT A GLANCE
-----------------------------------------*/
.cs-at-a-glance {
  padding: clamp(1.75rem, 3vw, 2.5rem);
  background: var(--cream-warm);
  border: 1px solid var(--rule);
  border-radius: var(--border-radius-default);
}

.cs-at-a-glance ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cs-at-a-glance li {
  position: relative;
  padding-left: 2.1rem;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

.cs-at-a-glance li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.3rem;
  width: 1.25rem;
  height: 1.25rem;
  background: var(--coral);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z'/></svg>") no-repeat center / contain;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z'/></svg>") no-repeat center / contain;
}

.cs-at-a-glance strong {
  color: var(--ink);
  font-weight: var(--font-weight-semibold);
}

/*---------------------------------------
  RESULTS CALLOUT
  (v1: qualitative bullets only;
   v2: numeric tiles row appears above)
-----------------------------------------*/
.cs-results {
  padding: clamp(1.75rem, 3vw, 2.5rem);
  background: var(--cream);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--coral);
  border-radius: var(--border-radius-default);
}

.cs-results-label {
  font-family: var(--mono-font-family);
  font-size: var(--mono-font-size);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--coral-deep);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 1.5rem 0;
  display: block;
}

/* Numeric tiles — empty in v1, drop in <div class="results-tiles">…</div> for v2 */
.results-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
}

.results-tile {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tile-number {
  font-family: var(--header-font-family);
  font-size: clamp(2.25rem, 3vw + 1rem, 3.25rem);
  font-weight: var(--font-weight-bold);
  color: var(--coral-deep);
  line-height: 1;
  letter-spacing: -0.02em;
}

.tile-prefix {
  font-size: 0.55em;
  font-weight: var(--font-weight-medium);
  color: var(--coral);
  margin-right: 0.15em;
  vertical-align: 0.35em;
  letter-spacing: 0;
}

.tile-label {
  font-family: var(--mono-font-family);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  line-height: 1.4;
}

.cs-results ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cs-results li {
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--ink);
  padding-left: 1.5rem;
  position: relative;
}

.cs-results li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--coral);
  font-weight: var(--font-weight-bold);
}

/*---------------------------------------
  HOW IT WORKS (STAR cards)
-----------------------------------------*/
.cs-actions-intro {
  margin-bottom: 2rem;
}

.cs-action-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.cs-action-card {
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background: var(--cream);
  border: 1px solid var(--rule);
  border-radius: var(--border-radius-default);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cs-action-header {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.cs-action-num {
  font-family: var(--mono-font-family);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--coral-deep);
  font-weight: var(--font-weight-semibold);
}

.cs-action-name {
  font-family: var(--header-font-family);
  font-size: 1.15rem;
  font-weight: var(--font-weight-semibold);
  color: var(--ink);
  margin: 0;
  line-height: 1.3;
}

.cs-action-step {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0.5rem 1.5rem;
  align-items: baseline;
}

.cs-action-step-label {
  font-family: var(--mono-font-family);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-light);
  font-weight: var(--font-weight-medium);
}

.cs-action-step-body {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

@media (max-width: 600px) {
  .cs-action-step {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/*---------------------------------------
  UNDER THE HOOD (collapsible)
-----------------------------------------*/
.cs-tech-details {
  border: 1px solid var(--rule);
  border-radius: var(--border-radius-default);
  background: var(--cream);
  overflow: hidden;
}

.cs-tech-details summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--mono-font-family);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: var(--font-weight-medium);
  list-style: none;
  transition: background 0.2s var(--ease-out);
}

.cs-tech-details summary:hover {
  background: var(--cream-warm);
}

.cs-tech-details summary::-webkit-details-marker {
  display: none;
}

.cs-tech-details summary::after {
  content: "+";
  font-family: var(--header-font-family);
  font-size: 1.5rem;
  font-weight: var(--font-weight-light);
  color: var(--coral);
  transition: transform 0.2s var(--ease-out);
}

.cs-tech-details[open] summary::after {
  transform: rotate(45deg);
}

.cs-tech-body {
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
}

.cs-tech-body p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 0 0 1rem 0;
}

.cs-tech-body code,
.cs-tech-body .cs-code {
  font-family: var(--mono-font-family);
  font-size: 0.82rem;
  background: rgba(236, 139, 94, 0.08);
  padding: 0.2rem 0.55rem;
  border-radius: var(--border-radius-default);
  color: var(--coral-deep);
  border: 1px solid rgba(236, 139, 94, 0.28);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.cs-tech-body ul {
  list-style: none;
  padding: 0;
  margin: 0.85rem 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cs-tech-body ul li {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink-soft);
  padding-left: 1.4rem;
  position: relative;
}

.cs-tech-body ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0.05rem;
  color: var(--coral);
  font-weight: var(--font-weight-semibold);
  font-size: 0.95rem;
}

/*---------------------------------------
  WHY THIS MATTERS (closing callout)
-----------------------------------------*/
.cs-why {
  padding: clamp(2rem, 4vw, 3rem);
  background: var(--navy-deep);
  border-radius: var(--border-radius-default);
  position: relative;
  overflow: hidden;
}

.cs-why::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.06) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
}

.cs-why > * {
  position: relative;
  z-index: 1;
}

.cs-why-label {
  font-family: var(--mono-font-family);
  font-size: var(--mono-font-size);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--coral-bright);
  font-weight: var(--font-weight-medium);
  margin-bottom: 1.25rem;
  display: block;
}

.cs-why h2 {
  color: #fff;
  font-family: var(--header-font-family);
  font-size: clamp(1.5rem, 1.5vw + 1rem, 2rem);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 0 0 1.5rem 0;
  max-width: 28ch;
}

.cs-why p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.0625rem;
  line-height: 1.7;
  margin: 0;
  max-width: 65ch;
}

/*---------------------------------------
  RELATED CASE STUDIES
-----------------------------------------*/
.cs-related {
  padding-block: clamp(3rem, 5vw, 5rem);
  background: var(--cream-warm);
}

.cs-related-header {
  margin-bottom: 2rem;
}

.cs-related-label {
  font-family: var(--mono-font-family);
  font-size: var(--mono-font-size);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral-deep);
  font-weight: var(--font-weight-medium);
  margin-bottom: 0.5rem;
  display: block;
}

.cs-related-title {
  font-family: var(--header-font-family);
  font-size: clamp(1.5rem, 1.5vw + 1rem, 2rem);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
}

.cs-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 1.5rem;
}

.cs-related-card {
  display: flex;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--rule);
  border-radius: var(--border-radius-default);
  background: var(--cream);
  overflow: hidden;
  transition: border-color 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
  min-height: 120px;
}

.cs-related-card:hover {
  border-color: var(--rule-strong);
  box-shadow: 0 6px 20px rgba(20, 26, 70, 0.06);
}

.cs-related-card-media {
  flex-shrink: 0;
  width: 140px;
  background: var(--cream-warm);
  border-right: 1px solid var(--rule);
  overflow: hidden;
}

.cs-related-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  display: block;
  transition: transform 0.6s var(--ease-out);
}

.cs-related-card:hover .cs-related-card-media img {
  transform: scale(1.04);
}

.cs-related-card-body {
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  flex: 1;
  justify-content: center;
}

.cs-related-card-eyebrow {
  font-family: var(--mono-font-family);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral-deep);
  font-weight: var(--font-weight-medium);
}

.cs-related-card-title {
  font-family: var(--header-font-family);
  font-size: 1.05rem;
  font-weight: var(--font-weight-semibold);
  color: var(--ink);
  margin: 0;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

@media (max-width: 600px) {
  .cs-related-card-media { width: 110px; }
  .cs-related-card-title { font-size: 0.95rem; }
}

/*---------------------------------------
  CTA BLOCK SPECIFIC TO CASE STUDIES
-----------------------------------------*/
.cs-cta {
  padding-block: clamp(3rem, 5vw, 4.5rem);
  background: var(--cream);
}

/*---------------------------------------
  RESPONSIVE
-----------------------------------------*/
@media (max-width: 768px) {
  .cs-meta-strip {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .cs-hero-lede {
    font-size: 1.15rem;
    padding-left: 1rem;
  }

  .cs-section p {
    font-size: 1rem;
  }
}

/*---------------------------------------
  HERO IMAGE — zoomable affordance
-----------------------------------------*/
.cs-hero-image {
  cursor: zoom-in;
}

.cs-hero-image:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
}

/*---------------------------------------
  IMAGE LIGHTBOX
-----------------------------------------*/
.cs-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1080;
  background: rgba(20, 20, 20, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 3rem);
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease, visibility 0s linear 200ms;
}

.cs-lightbox[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transition: opacity 200ms ease;
}

.cs-lightbox-image {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--border-radius-default);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  cursor: zoom-out;
  background: var(--cream-warm);
}

.cs-lightbox-close {
  position: absolute;
  top: clamp(0.75rem, 2vw, 1.5rem);
  right: clamp(0.75rem, 2vw, 1.5rem);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: white;
  font-size: 1.75rem;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 150ms ease;
}

.cs-lightbox-close:hover,
.cs-lightbox-close:focus-visible {
  background: rgba(255, 255, 255, 0.25);
  outline: 2px solid white;
  outline-offset: 2px;
}

body.cs-lightbox-open {
  overflow: hidden;
}