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

/* ---- CASE STUDY HERO ---- */
.cs-hero {
  padding-top: calc(80px + clamp(var(--space-16), 8vw, var(--space-32)));
  padding-bottom: clamp(var(--space-16), 8vw, var(--space-32));
  position: relative;
  overflow: hidden;
}

.cs-hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-divider) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-divider) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 100%, black 20%, transparent 100%);
  opacity: 0.3;
  pointer-events: none;
}

.cs-hero__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  text-decoration: none;
}

.cs-hero__back:hover {
  color: var(--color-primary);
}

.cs-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.cs-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin-bottom: var(--space-6);
}

.cs-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.65;
  margin-bottom: var(--space-10);
}

.cs-hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-1);
  max-width: 800px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.cs-meta-item {
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
}

.cs-meta-item:last-child {
  border-right: none;
}

.cs-meta-item__label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-1);
}

.cs-meta-item__value {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

/* ---- VISUAL BANNER ---- */
.cs-banner {
  width: 100%;
  aspect-ratio: 16/7;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-block: clamp(var(--space-10), 5vw, var(--space-16));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cs-banner__text {
  font-family: var(--font-display);
  font-size: clamp(5rem, 15vw, 14rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  opacity: 0.07;
  user-select: none;
  color: var(--color-primary);
}

/* ---- CASE STUDY BODY ---- */
.cs-body {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}

.cs-section {
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
  border-top: 1px solid var(--color-divider);
}

.cs-section:first-child {
  border-top: none;
}

.cs-section__label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.cs-section__label::before {
  content: '';
  width: 20px;
  height: 1.5px;
  background: var(--color-primary);
  flex-shrink: 0;
}

.cs-section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}

.cs-body p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.cs-body p strong {
  color: var(--color-text);
  font-weight: 600;
}

.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-block: var(--space-6);
}

.cs-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.cs-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.cs-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.cs-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-block: var(--space-6);
}

.cs-step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.cs-step__num {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary-subtle);
  border: 1px solid var(--color-primary-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
}

.cs-step__content {
  padding-top: var(--space-2);
}

.cs-step__title {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.cs-step__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.cs-outcome-box {
  background: var(--color-primary-subtle);
  border: 1px solid var(--color-primary-glow);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-block: var(--space-8);
}

.cs-outcome-box__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  margin-bottom: var(--space-5);
  color: var(--color-text);
}

.cs-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.cs-stat {
  text-align: center;
}

.cs-stat__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-stat__label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ---- NEXT PROJECT NAV ---- */
.next-project {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-10);
}

.next-project__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.next-project__label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.next-project__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.next-project__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.next-project__link:hover {
  background: var(--color-primary-hover);
  transform: translateX(3px);
}

@media (max-width: 768px) {
  .cs-two-col { grid-template-columns: 1fr; }
  .cs-stats-row { grid-template-columns: 1fr; }
  .cs-hero__meta { grid-template-columns: 1fr 1fr; }
  .cs-meta-item { border-right: none; border-bottom: 1px solid var(--color-border); }
  .cs-meta-item:last-child { border-bottom: none; }
  .next-project__inner { flex-direction: column; align-items: flex-start; }
}