/* CASE STUDY HERO */
.cs-hero {
  padding: 160px 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 56px;
  transition: color 0.2s, gap 0.2s;
}
.cs-back:hover { color: var(--accent); gap: 12px; }
.cs-back-arrow { font-size: 16px; }

.cs-hero-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 80px;
  align-items: start;
}

.cs-eyebrow {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.cs-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(38px, 5.5vw, 72px);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 24px;
}
.cs-title em { font-style: italic; color: var(--text-mid); }

.cs-summary {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 36px;
}

.cs-cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* META PANEL */
.cs-meta-panel { padding-top: 4px; }
.cs-meta-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 0.5px solid var(--border);
}
.cs-meta-row:first-child { border-top: 0.5px solid var(--border); }
.cs-meta-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.cs-meta-val { font-size: 13px; color: var(--text); line-height: 1.5; }
.cs-meta-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }

/* IMAGE GALLERY */
.cs-gallery {
  width: 100%;
  margin-bottom: 0;
}
.cs-gallery-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2px;
}
.cs-gallery-img {
  background: var(--bg3);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  overflow: hidden;
}
.cs-gallery-img.tall { aspect-ratio: 3/4; }
.cs-gallery-img img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* CASE STUDY BODY */
.cs-body { max-width: 1200px; margin: 0 auto; padding: 0 48px 80px; }

.cs-section { margin-bottom: 72px; }
.cs-section:last-child { margin-bottom: 0; }

.cs-section-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
  padding-top: 20px;
  margin-bottom: 36px;
}

.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.cs-three-col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.cs-prose h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 16px;
}
.cs-prose h3 em { font-style: italic; color: var(--text-mid); }
.cs-prose p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}
.cs-prose p:last-child { margin-bottom: 0; }

/* IMAGE PLACEHOLDER IN BODY */
.cs-img {
  background: var(--bg2);
  border: 0.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.cs-img-wide { aspect-ratio: 16/7; width: 100%; }
.cs-img-square { aspect-ratio: 1/1; }
.cs-img-tall { aspect-ratio: 3/4; }
.cs-img img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* COMPETENCY BREAKDOWN */
.cs-competency-block { margin-bottom: 64px; }
.cs-competency-block:last-child { margin-bottom: 0; }

.cs-competency-title {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.cs-competency-title::after {
  content: '';
  display: block;
  flex: 1;
  height: 0.5px;
  background: var(--accent);
}

.cs-ksat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.cs-ksat-cell {
  background: var(--bg2);
  padding: 28px 32px;
}

.cs-ksat-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.cs-ksat-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* OUTCOME CALLOUT */
.cs-outcome {
  background: var(--bg2);
  border-left: 2px solid var(--accent);
  padding: 28px 32px;
  margin-top: 32px;
}
.cs-outcome-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.cs-outcome-text {
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
}

/* NEXT PROJECT NAV */
.cs-next {
  border-top: 0.5px solid var(--border);
  padding: 48px 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cs-next-link {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.cs-next-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.cs-next-title {
  font-family: 'DM Serif Display', serif;
  font-size: 22px;
  font-weight: 400;
  color: var(--text);
  transition: color 0.2s;
}
.cs-next-link:hover .cs-next-title { color: var(--accent); }
.cs-next-arrow { font-size: 20px; color: var(--text-muted); }

@media (max-width: 900px) {
  .cs-hero { padding: 140px 24px 64px; }
  .cs-hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .cs-body { padding: 0 24px 60px; }
  .cs-gallery-grid { grid-template-columns: 1fr 1fr; }
  .cs-two-col, .cs-three-col { grid-template-columns: 1fr; gap: 40px; }
  .cs-ksat-grid { grid-template-columns: 1fr; }
  .cs-next { padding: 40px 24px 60px; flex-direction: column; gap: 24px; align-items: flex-start; }
  .cs-cta-row { flex-wrap: wrap; }
}

/* ── Phone hero showcase (gallery band below case study hero) ── */
.cs-phone-hero {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 80px 48px 0;
  gap: 0;
  overflow: hidden;
  position: relative;
}
.cs-phone-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.cs-ph-phone {
  width: 200px;
  border-radius: 36px;
  overflow: hidden;
  border: 2px solid rgba(255,255,255,0.1);
  box-shadow: 0 40px 100px rgba(0,0,0,0.8);
  flex-shrink: 0;
}
.cs-ph-phone img { width: 100%; display: block; }
.cs-ph-phone--left {
  transform: rotate(-7deg) translateX(60px) translateY(40px);
  z-index: 1;
  width: 170px;
  opacity: 0.7;
}
.cs-ph-phone--center { z-index: 3; }
.cs-ph-phone--right {
  transform: rotate(7deg) translateX(-60px) translateY(40px);
  z-index: 1;
  width: 170px;
  opacity: 0.7;
}

/* ── Horizontal screen scroll strip ── */
.cs-screens-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 2px 0 16px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  margin-top: 2px;
}
.cs-screens-scroll::-webkit-scrollbar { height: 4px; }
.cs-screens-scroll::-webkit-scrollbar-track { background: transparent; }
.cs-screens-scroll::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.cs-screen-item {
  flex-shrink: 0;
  width: 200px;
  border-radius: 28px;
  overflow: hidden;
  border: 1.5px solid var(--border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.cs-screen-item img { width: 100%; display: block; }

@media (max-width: 900px) {
  .cs-phone-hero { padding: 60px 24px 0; }
  .cs-ph-phone { width: 160px; }
  .cs-ph-phone--left, .cs-ph-phone--right { width: 130px; }
}

@media (max-width: 480px) {
  .cs-hero { padding: 120px 20px 48px; }
  .cs-body { padding: 0 20px 48px; }
  .cs-gallery-grid { grid-template-columns: 1fr; }
  .cs-gallery-img.tall { aspect-ratio: 4/3; }
  .cs-ksat-cell { padding: 20px; }
  .cs-next { padding: 32px 20px 48px; }
  .cs-title { font-size: clamp(32px, 9vw, 52px); }
  .cs-prose h3 { font-size: 22px; }
  .cs-outcome { padding: 20px 20px; }
}

/* Reusable responsive grid helpers */
.cs-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.cs-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

@media (max-width: 900px) {
  .cs-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .cs-grid-4 { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}
@media (max-width: 480px) {
  .cs-grid-3 { grid-template-columns: 1fr; }
  .cs-grid-4 { grid-template-columns: 1fr 1fr; gap: 12px; }
}