/* ===========================
   CASE STUDY CSS
   Shared styles for case study pages
   =========================== */

/* === HERO === */
.cs-hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--gap);
  background: var(--dark);
  border-bottom: var(--gap) solid var(--dark);
}

.cs-hero-left {
  background: var(--dark);
  color: var(--cream);
  padding: 80px 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 400px;
}

.cs-hero-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 24px;
}

.cs-hero-title {
  font-size: clamp(42px, 5vw, 60px);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--cream);
  margin-bottom: 12px;
}

.cs-hero-client {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 24px;
}

.cs-hero-summary {
  font-size: 15px;
  line-height: 1.75;
  opacity: 0.5;
  color: var(--cream);
  max-width: 480px;
}

.cs-hero-right {
  background: var(--dark);
}

.cs-hero-stat {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
}

.cs-hero-stat-yellow {
  background: var(--yellow);
  color: var(--dark);
}

.cs-hero-stat-blue {
  background: var(--blue);
  color: var(--cream);
}

.cs-hero-stat-red {
  background: var(--red);
  color: var(--cream);
}

/* === SECTIONS === */
.cs-section {
  border-bottom: var(--gap) solid var(--dark);
}

.cs-section-inner {
  padding: 72px 60px;
  max-width: 900px;
}

.cs-section-cream {
  background: var(--cream);
  color: var(--dark);
}

.cs-section-dark {
  background: var(--dark);
  color: var(--cream);
}

.cs-section-dark .cs-section-inner {
  max-width: 100%;
}

.cs-section-accent {
  background: var(--darkalt);
  color: var(--cream);
}

.cs-section-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 16px;
}

.cs-label-light {
  color: var(--yellow);
}

.cs-section-title {
  font-size: 36px;
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.cs-title-light {
  color: var(--cream);
}

.cs-section-text {
  font-size: 15px;
  line-height: 1.75;
  opacity: 0.65;
  margin-bottom: 16px;
  max-width: 640px;
}

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

/* === FEATURES === */
.cs-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
  margin-top: 32px;
  background: var(--dark);
}

.cs-feature {
  background: var(--darkalt);
  padding: 36px 32px;
}

.cs-feature-title {
  font-size: 18px;
  font-weight: 900;
  color: var(--cream);
  margin-bottom: 10px;
}

.cs-feature-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--cream);
  opacity: 0.55;
}

/* === RESULTS === */
.cs-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  margin-top: 32px;
  background: var(--dark);
}

.cs-result {
  background: var(--dark);
  padding: 32px 28px;
  border-left: 3px solid var(--yellow);
}

.cs-result-title {
  font-size: 18px;
  font-weight: 900;
  color: var(--cream);
  margin-bottom: 8px;
}

.cs-result-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--cream);
  opacity: 0.55;
}

/* === STATS GRID === */
.cs-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
  background: var(--dark);
}

.cs-stat {
  padding: 32px 24px;
  text-align: center;
}

.cs-stat-yellow { background: var(--yellow); color: var(--dark); }
.cs-stat-dark { background: var(--dark); color: var(--cream); }
.cs-stat-red { background: var(--red); color: var(--cream); }
.cs-stat-blue { background: var(--blue); color: var(--cream); }

.cs-stat-num {
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 6px;
}

.cs-stat-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.65;
}

/* === TAKEAWAY === */
.cs-takeaway {
  background: var(--dark);
  color: var(--cream);
  border-bottom: var(--gap) solid var(--dark);
  padding: 80px 60px;
}

.cs-takeaway-inner {
  max-width: 700px;
}

.cs-takeaway-text {
  font-size: 28px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  border-left: 4px solid var(--yellow);
  padding-left: 24px;
  margin-bottom: 24px;
}

.cs-takeaway-detail {
  font-size: 15px;
  line-height: 1.75;
  opacity: 0.5;
}

/* === CTA === */
.cs-cta {
  background: var(--yellow);
  color: var(--dark);
  padding: 72px 60px;
  text-align: center;
  border-bottom: var(--gap) solid var(--dark);
}

.cs-cta h2 {
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 12px;
}

.cs-cta p {
  font-size: 15px;
  opacity: 0.6;
  margin-bottom: 28px;
}

.cs-cta-btn {
  display: inline-block;
  background: var(--dark);
  color: var(--cream);
  padding: 18px 40px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: opacity 0.15s;
}

.cs-cta-btn:hover {
  opacity: 0.85;
}

/* === MOBILE === */
@media (max-width: 768px) {
  .cs-hero {
    grid-template-columns: 1fr;
  }

  .cs-hero-left {
    padding: 48px 24px;
    min-height: auto;
  }

  .cs-hero-stat {
    padding: 28px 24px;
  }

  .cs-section-inner {
    padding: 48px 24px;
  }

  .cs-section-title {
    font-size: 28px;
  }

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

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

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

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

  .cs-takeaway-text {
    font-size: 22px;
  }

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

  .cs-cta h2 {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .cs-stats-grid {
    grid-template-columns: 1fr;
  }
}