/* ============================================
   CASE STUDY PAGE STYLES
   ============================================ */

/* ---- HERO ---- */
.cs-hero {
  padding: 140px 48px 64px;
  border-bottom: 1px solid var(--rule);
  max-width: 900px;
}

.cs-back {
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 36px;
}
.cs-back a { transition: color 0.2s; }
.cs-back a:hover { color: var(--r1); }

.cs-hero-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.cs-title {
  font-family: var(--display);
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 400;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 24px;
}

.cs-subtitle {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: 48px;
}

.cs-attrs {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.cs-attr-label {
  font-size: 15px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.cs-attr-value {
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---- COVER IMAGE ---- */
.cs-cover {
  padding: 48px 48px 0;
}

.cs-cover-img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

/* ---- BODY ---- */
.cs-body {
  max-width: 1200px;
  margin: 0 auto;
}

/* ---- SECTIONS ---- */
.cs-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 72px 48px;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}

.cs-section-label {
  font-size: 15px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--r1);
  padding-top: 6px;
  position: sticky;
  top: 80px;
}

.cs-section-content h2 {
  font-family: var(--display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 400;
  letter-spacing: -0.5px;
  line-height: 1.15;
  margin-bottom: 20px;
}

.cs-section-content p {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 16px;
  max-width: 620px;
}

/* ---- QUOTE ---- */
.cs-quote {
  border-left: 2px solid var(--r1);
  padding: 16px 24px;
  margin: 28px 0;
  background: var(--bg-2);
}

.cs-quote p, .cs-quote {
  font-family: var(--display);
  font-size: 18px;
  font-style: italic;
  color: var(--ink);
  line-height: 1.6;
  margin-bottom: 10px;
}

.cs-quote cite {
  font-family: var(--sans);
  font-style: normal;
  font-size: 15px;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}

/* ---- FINDINGS ---- */
.cs-findings {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
}

.cs-finding {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--rule);
  align-items: flex-start;
}

.cs-finding-num {
  font-size: 15px;
  color: var(--r1);
  letter-spacing: 0.1em;
  min-width: 24px;
  padding-top: 2px;
}

.cs-finding strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--ink);
}

.cs-finding p {
  font-size: 15px !important;
  color: var(--ink-soft);
  margin: 0 !important;
}

/* ---- FULL WIDTH IMAGE ---- */
.cs-img-full {
  padding: 48px 48px 0;
}

.cs-img-full .placeholder-img {
  width: 100%;
  aspect-ratio: 16/9;
}

.cs-img-full img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

/* ---- IMAGE GRID ---- */
.cs-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 48px 48px 0;
}

.cs-img-grid .placeholder-img {
  aspect-ratio: 4/3;
}

.cs-img-grid img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

.cs-img-caption {
  padding: 12px 48px 0;
  font-size: 15px;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

/* ---- ANNOTATED ---- */
.cs-img-annotated {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  padding: 48px 48px 0;
  align-items: start;
}

.cs-annotated-img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

.cs-annotations {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 8px;
}

.cs-annotation {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.cs-annotation-marker {
  width: 24px;
  height: 24px;
  min-width: 24px;
  background: var(--r1);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.cs-annotation strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--ink);
}

.cs-annotation p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0;
}

/* ---- STACK ---- */
.cs-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 24px 0;
  border: 1px solid var(--rule);
  max-width: 480px;
}

.cs-stack-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  color: var(--ink-soft);
}
.cs-stack-item:last-child { border-bottom: none; }

.cs-stack-label {
  color: var(--ink-soft);
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---- RETROSPECTIVE ---- */
.cs-retro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 28px;
}

.cs-retro-label {
  font-size: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--r1);
  margin-bottom: 16px;
}

.cs-retro ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cs-retro li {
  font-size: 15px;
  color: var(--ink-soft);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.cs-retro-col:first-child li::before {
  content: '+';
  position: absolute;
  left: 0;
  color: var(--r1);
}

.cs-retro-col:last-child li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--ink-soft);
}

/* ---- NEXT PROJECT ---- */
.cs-next {
  border-top: 1px solid var(--rule);
  padding: 64px 48px;
}

.cs-next-label {
  font-size: 15px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.cs-next-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--display);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  transition: color 0.2s;
}

.cs-next-link:hover { color: var(--r1); }

.cs-next-arrow {
  font-family: var(--sans);
  font-size: 24px;
}

/* ---- SCROLL FADE ---- */
.cs-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.cs-fade.visible {
  opacity: 1;
  transform: none;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 920px) {
  .cs-hero { padding: 120px 24px 48px; }
  .cs-attrs { gap: 24px; }

  .cs-section {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 48px 24px;
  }

  .cs-section-label { position: static; }

  .cs-cover,
  .cs-img-full,
  .cs-img-grid,
  .cs-img-annotated,
  .cs-img-caption { padding-left: 24px; padding-right: 24px; }

  .cs-img-grid { grid-template-columns: 1fr; }

  .cs-img-annotated { grid-template-columns: 1fr; }

  .cs-retro { grid-template-columns: 1fr; }

  .cs-next { padding: 48px 24px; }
}