/* ===========================
   Case Study Page Styles
   =========================== */

.case-study-page {
  background-color: var(--sage-green);
}

/* Back Navigation */
.case-study-back {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--sage-green);
  max-width: 100%;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.case-study-back.stuck {
  border-bottom-color: rgba(255, 227, 194, 0.25);
}

.case-study-back .btn {
  flex-shrink: 0;
}

/* Hero */
.cs-hero {
  padding: var(--space-sm) 0 var(--space-sm);
}

.cs-hero-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.cs-title {
  font-family: var(--font-headline);
  font-size: var(--type-h1);
  font-weight: 400;
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.cs-subtitle {
  font-family: var(--font-body);
  font-size: var(--type-body-lg);
  font-weight: 400;
  color: var(--off-white);
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Sections */
.cs-section {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-lg) 0;
}

.cs-section-last {
  padding-bottom: var(--space-lg);
}

.cs-heading {
  font-family: var(--font-headline);
  font-size: var(--type-h2);
  font-weight: 400;
  color: var(--cream);
  margin-bottom: var(--space-md);
}

.cs-subheading {
  font-family: var(--font-body);
  font-size: var(--type-title);
  font-weight: 700;
  color: var(--white);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-md);
}

.cs-section p {
  color: var(--off-white);
  font-size: var(--type-body);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.cs-list {
  color: var(--off-white);
  font-size: var(--type-body);
  line-height: 1.8;
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.cs-list li {
  margin-bottom: var(--space-xs);
}

/* Columns (Scope, Team) */
.cs-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

/* Images */
.cs-image {
  overflow: hidden;
}

.cs-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.cs-image-full {
  max-width: 1000px;
  margin: var(--space-md) auto;
  padding: 0 var(--space-lg);
}

.cs-image-grid {
  max-width: 1000px;
  margin: var(--space-xl) auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.cs-image-grid-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

/* Case Study Carousel */
.cs-carousel {
  max-width: 1000px;
  margin: var(--space-lg) auto;
  padding: 0 var(--space-lg);
}

.cs-carousel-image-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: #161412;
}

.cs-carousel-image {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.3s ease;
}

.cs-carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(31, 29, 27, 0.7);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  transition: background 0.2s ease;
  z-index: 2;
}

.cs-carousel-arrow:hover {
  background: rgba(31, 29, 27, 0.9);
}

.cs-carousel-arrow-prev {
  left: var(--space-md);
}

.cs-carousel-arrow-next {
  right: var(--space-md);
}

.cs-carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
}

.cs-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--off-white);
  opacity: 0.4;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.cs-dot.active {
  opacity: 1;
  background: var(--orange);
}

.cs-dot:hover {
  opacity: 0.8;
}

/* Wavy Image Mask */
.cs-image-wavy {
  max-width: 1000px;
  margin: var(--space-lg) auto;
  padding: 0 var(--space-lg);
  position: relative;
}

.cs-wavy-defs {
  position: absolute;
  width: 0;
  height: 0;
}

.cs-wavy-image {
  width: 100%;
  height: auto;
  display: block;
}

/* Inset Image (smaller, left-aligned with text column) */
.cs-image-inset {
  max-width: 800px;
  margin: var(--space-md) auto;
  padding: 0 var(--space-lg);
}

.cs-image-inset img {
  max-width: 60%;
  border-radius: var(--radius-md);
}

/* Responsive */
@media (max-width: 768px) {
  .cs-columns {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

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

  .cs-image-grid-3 {
    grid-template-columns: 1fr;
  }

  .cs-title {
    font-size: var(--type-h1);
  }
}

@media (max-width: 618px) {
  .case-study-back {
    padding: var(--space-sm) var(--space-md);
  }

  .case-study-back .btn {
    font-size: var(--type-caption);
    padding: 6px 14px;
  }

  .cs-hero-inner {
    padding: 0 var(--space-md);
  }

  .cs-section {
    padding: var(--space-lg) var(--space-md) 0;
  }

  .cs-image-full {
    padding: 0 var(--space-md);
  }

  .cs-image-grid {
    padding: 0 var(--space-md);
  }

  .cs-carousel {
    padding: 0 var(--space-md);
  }

  .cs-image-wavy {
    padding: 0 var(--space-md);
  }

  .cs-image-inset {
    padding: 0 var(--space-md);
  }
}