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

/* ── Layout ──────────────────────────────────────────────── */
.case-study-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-16);
  align-items: start;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 6rem);
}

/* ── TOC Sidebar ─────────────────────────────────────────── */
.toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-8));
  padding-top: var(--space-8);
}

.toc__title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.toc__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.toc__item {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: all var(--duration-fast);
  line-height: 1.4;
}

.toc__item:hover {
  color: var(--color-text-primary);
  border-left-color: var(--color-border-strong);
  background: var(--color-hover-bg);
}

.toc__item.active {
  color: var(--color-text-primary);
  border-left-color: var(--color-text-primary);
  background: var(--color-hover-bg);
  font-weight: var(--weight-semibold);
}

/* ── Case Study Hero ─────────────────────────────────────── */
.cs-hero {
  padding-block: var(--space-24) var(--space-16);
  border-bottom: 1px solid var(--color-border);
}

.cs-hero__category {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.cs-hero__title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: var(--weight-black);
  letter-spacing: -0.04em;
  line-height: 0.97;
  margin-bottom: var(--space-8);
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cs-meta__item {}

.cs-meta__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.cs-meta__value {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.cs-hero__image {
  margin-top: var(--space-12);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.cs-hero__image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ── Case Study Body ─────────────────────────────────────── */
.cs-body {
  padding-block: var(--space-16);
}

.cs-section {
  margin-bottom: var(--space-20);
  scroll-margin-top: calc(var(--nav-height) + var(--space-8));
}

.cs-section__eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.cs-section__title {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: var(--weight-black);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.cs-section__body {
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  max-width: 65ch;
}

.cs-section__body p + p {
  margin-top: var(--space-4);
}

.cs-divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-16);
}

/* ── Two column layout ───────────────────────────────────── */
.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  margin-block: var(--space-8);
}

/* ── Full bleed image ────────────────────────────────────── */
.cs-image {
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-block: var(--space-8);
}

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

.cs-image--full {
  border-radius: 0;
  border-left: none;
  border-right: none;
  margin-inline: calc(0px - clamp(1.5rem, 5vw, 6rem));
  width: calc(100% + clamp(3rem, 10vw, 12rem));
}

/* ── Outcome Stats ───────────────────────────────────────── */
.cs-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-block: var(--space-8);
}

.cs-stat {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg-secondary);
}

.cs-stat__number {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: var(--weight-black);
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.cs-stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ── Next Project ────────────────────────────────────────── */
.cs-next {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-16);
}

.cs-next__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.cs-next__card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-base);
  gap: var(--space-6);
}

.cs-next__card:hover {
  border-color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
}

.cs-next__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-1);
}

.cs-next__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.cs-next__arrow {
  font-size: var(--text-xl);
  transition: transform var(--duration-base) var(--ease-spring);
}

.cs-next__card:hover .cs-next__arrow {
  transform: translateX(6px);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .case-study-layout {
    grid-template-columns: 1fr;
  }
  .toc { display: none; }
  .cs-two-col { grid-template-columns: 1fr; }
  .cs-stats-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .cs-stats-grid { grid-template-columns: 1fr; }
  .cs-meta { flex-direction: column; gap: var(--space-4); }
}

/* ── Slideshow Component ─────────────────────────────────── */
.cs-slideshow {
  margin-block: var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-bg-secondary);
  display: flex;
  flex-direction: column;
}

.cs-slideshow__viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #0d0d0d;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.cs-slideshow__slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cs-slideshow__slide.active {
  opacity: 1;
  visibility: visible;
  position: relative;
}

.cs-slideshow__slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.cs-slideshow__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
}

.cs-slideshow__btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  transition: all var(--duration-fast);
}

.cs-slideshow__btn:hover {
  background: var(--color-hover-bg);
  border-color: var(--color-text-primary);
}

.cs-slideshow__counter {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.cs-slideshow__thumbnails {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-4);
  overflow-x: auto;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  scroll-behavior: smooth;
}

.cs-slideshow__thumbnails::-webkit-scrollbar {
  height: 4px;
}
.cs-slideshow__thumbnails::-webkit-scrollbar-track {
  background: transparent;
}
.cs-slideshow__thumbnails::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.cs-slideshow__thumb {
  width: 80px;
  height: 50px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--duration-fast);
  opacity: 0.6;
}

.cs-slideshow__thumb:hover {
  opacity: 0.9;
}

.cs-slideshow__thumb.active {
  border-color: var(--color-text-primary);
  opacity: 1;
}

.cs-slideshow__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}