/* ============================================================
   CASE STUDIES PAGE — page-case-studies.css
   Unique styles only. All tokens from Global.css.
   ============================================================ */

/* ============================================================
   CS-1 HERO
   ============================================================ */

.cs-hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}

.cs-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.cs-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.cs-hero__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 15%, rgba(215,25,32,.22), transparent 32%),
    linear-gradient(135deg, rgba(11,13,16,.92) 0%, rgba(23,26,31,.80) 55%, rgba(36,39,46,.70) 100%);
}

.cs-hero__inner {
  position: relative;
  z-index: 1;
  padding: var(--sp-8) var(--sp-5);
  max-width: 1160px;
  margin: 0 auto;
}

.cs-hero__badge {
  display: inline-block;
  background: rgba(215,25,32,0.18);
  border: 1px solid rgba(215,25,32,0.40);
  color: var(--brand-mid);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  font-family: 'DM Mono', monospace;
  margin-bottom: var(--sp-3);
}

.cs-hero__title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: var(--sp-3);
  max-width: 640px;
}

.cs-hero__title em {
  font-style: normal;
  color: var(--brand-mid);
}

.cs-hero__subtitle {
  font-size: var(--text-md);
  color: rgba(255,255,255,0.65);
  line-height: 1.65;
  max-width: 540px;
  margin-bottom: var(--sp-5);
}

.cs-hero__cta-group {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

/* ============================================================
   CS-2 STATS BAR
   ============================================================ */

.cs-stats {
  padding: var(--sp-5) var(--sp-5);
  background:
    radial-gradient(circle at 20% 15%, rgba(215,25,32,.24), transparent 32%),
    radial-gradient(circle at 85% 25%, rgba(255,255,255,.06), transparent 34%),
    linear-gradient(135deg, #0B0D10 0%, #171A1F 55%, #24272E 100%);
}

.cs-stats__inner {
  max-width: 1160px;
  margin: 0 auto;
}

.cs-stats__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.cs-stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.cs-stats__num {
  font-family: 'DM Mono', monospace;
  font-size: var(--text-3xl);
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.cs-stats__unit {
  font-size: var(--text-xl);
  color: var(--brand-mid);
}

.cs-stats__label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.45);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.cs-stats__divider {
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,0.10);
}

/* ============================================================
   CS-3 CASE GRID
   ============================================================ */

.cs-grid {
  padding: var(--sp-7) var(--sp-5);
}

.cs-grid .container {
  max-width: 1160px;
  margin: 0 auto;
}

/* Filter Bar */
.cs-filter {
  display: flex;
  gap: var(--sp-1);
  flex-wrap: wrap;
  margin-bottom: var(--sp-5);
  margin-top: var(--sp-4);
}

.cs-filter__btn {
  padding: 7px 18px;
  border-radius: 100px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-600);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: 'DM Sans', system-ui, sans-serif;
}

.cs-filter__btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-subtle);
}

.cs-filter__btn--active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.cs-filter__btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* Card Grid */
.cs-grid__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}

/* Individual Card */
.cs-card {
  background: var(--white);
  border-radius: var(--r-lg);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.cs-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: var(--brand);
}

.cs-card--featured {
  border-color: rgba(215,25,32,0.20);
}

/* Card Image */
.cs-card__img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--gray-50);
}

.cs-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.cs-card:hover .cs-card__img-wrap img {
  transform: scale(1.04);
}

.cs-card__year-badge {
  position: absolute;
  top: var(--sp-1);
  right: var(--sp-1);
  background: rgba(11,13,16,0.75);
  color: rgba(255,255,255,0.85);
  font-size: var(--text-xs);
  font-weight: 700;
  font-family: 'DM Mono', monospace;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  backdrop-filter: blur(4px);
}

.cs-card__featured-tag {
  position: absolute;
  top: var(--sp-1);
  left: var(--sp-1);
  background: var(--brand);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--r-sm);
}

/* Card Body */
.cs-card__body {
  padding: var(--sp-3);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  flex: 1;
}

.cs-card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.cs-card__country {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--gray-600);
}

.cs-card__country svg {
  color: var(--gray-400);
  flex-shrink: 0;
}

.cs-card__machine {
  font-size: var(--text-xs);
  font-weight: 700;
  font-family: 'DM Mono', monospace;
  color: var(--brand);
  background: var(--brand-tint);
  padding: 2px 8px;
  border-radius: var(--r-sm);
}

.cs-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--gray-800);
  line-height: 1.4;
  margin-top: 4px;
}

.cs-card__desc {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.6;
  flex: 1;
}

.cs-card__result {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-2);
  background: var(--green-bg);
  border-radius: var(--r-md);
  margin-top: auto;
}

.cs-card__result-icon {
  color: var(--green-fg);
  flex-shrink: 0;
  margin-top: 2px;
}

.cs-card__result span:last-child {
  font-size: var(--text-sm);
  color: var(--green-fg);
  font-weight: 500;
  line-height: 1.5;
}

.cs-card__result strong {
  font-weight: 700;
}

/* ============================================================
   CS-4 FEATURED DEEP-DIVE CASES (continued)
   ============================================================ */

.cs-featured::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 59px,
      rgba(255,255,255,0.025) 59px, rgba(255,255,255,0.025) 60px),
    repeating-linear-gradient(90deg, transparent, transparent 59px,
      rgba(255,255,255,0.025) 59px, rgba(255,255,255,0.025) 60px);
  pointer-events: none;
  z-index: 0;
}

.cs-featured .container {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
}

/* Featured Case Row */
.cs-featured__case {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  align-items: center;
  padding: var(--sp-6) 0;
}

.cs-featured__case--reverse {
  direction: rtl;
}

.cs-featured__case--reverse > * {
  direction: ltr;
}

/* Image Column */
.cs-featured__img-wrap {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
}

.cs-featured__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.cs-featured__case:hover .cs-featured__img-wrap img {
  transform: scale(1.03);
}

.cs-featured__img-badge {
  position: absolute;
  bottom: var(--sp-2);
  left: var(--sp-2);
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  background: rgba(11,13,16,0.80);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--r-md);
  padding: 6px 12px;
}

.cs-featured__img-country {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
}

.cs-featured__img-year {
  font-size: var(--text-xs);
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  color: var(--brand-mid);
  border-left: 1px solid rgba(255,255,255,0.15);
  padding-left: var(--sp-1);
}

/* Content Column */
.cs-featured__tag-row {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: var(--sp-2);
  flex-wrap: wrap;
}

.cs-featured__machine-tag {
  font-size: var(--text-xs);
  font-weight: 700;
  font-family: 'DM Mono', monospace;
  color: var(--brand-mid);
  background: rgba(215,25,32,0.15);
  border: 1px solid rgba(215,25,32,0.25);
  padding: 3px 10px;
  border-radius: var(--r-sm);
}

.cs-featured__type-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255,255,255,0.50);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  padding: 3px 10px;
  border-radius: var(--r-sm);
}

.cs-featured__title {
  font-size: var(--text-xl);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  margin-bottom: var(--sp-4);
}

/* Challenge / Solution / Outcome blocks */
.cs-featured__cso {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.cs-featured__cso-block {
  padding: var(--sp-2) var(--sp-3);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  border-left: 3px solid rgba(255,255,255,0.12);
}

.cs-featured__cso-block--outcome {
  background: rgba(22,101,52,0.15);
  border-color: rgba(34,197,94,0.20);
  border-left-color: rgba(34,197,94,0.60);
}

.cs-featured__cso-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.40);
  margin-bottom: var(--sp-1);
  font-family: 'DM Mono', monospace;
}

.cs-featured__cso-block--outcome .cs-featured__cso-label {
  color: rgba(34,197,94,0.70);
}

.cs-featured__cso-block p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
  margin: 0;
}

.cs-featured__cso-block--outcome p {
  color: rgba(255,255,255,0.80);
}

.cs-featured__cso-block strong {
  color: #fff;
  font-weight: 700;
}

/* Stats Row */
.cs-featured__stats-row {
  display: flex;
  gap: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid rgba(255,255,255,0.08);
  flex-wrap: wrap;
}

.cs-featured__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cs-featured__stat-num {
  font-family: 'DM Mono', monospace;
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.cs-featured__stat-unit {
  font-size: var(--text-sm);
  color: var(--brand-mid);
  font-weight: 600;
  margin-top: 2px;
}

.cs-featured__stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.40);
  font-weight: 500;
  margin-top: 4px;
}

/* Divider between cases */
.cs-featured__divider {
  height: 1px;
  background: rgba(255,255,255,0.07);
  margin: 0;
}

/* ============================================================
   CS-5 CTA
   ============================================================ */

.cs-cta {
  padding: var(--sp-7) var(--sp-5);
  background:
    radial-gradient(circle at 20% 15%, rgba(215,25,32,.24), transparent 32%),
    radial-gradient(circle at 85% 25%, rgba(255,255,255,.06), transparent 34%),
    linear-gradient(135deg, #0B0D10 0%, #171A1F 55%, #24272E 100%);
}

.cs-cta__inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.cs-cta__content {
  flex: 1;
  min-width: 280px;
}

.cs-cta__content .section-title {
  display: block;
  margin-bottom: var(--sp-2);
}

.cs-cta__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: var(--sp-2);
}

.cs-cta__title em {
  font-style: normal;
  color: var(--brand-mid);
}

.cs-cta__desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.55);
  line-height: 1.65;
  max-width: 480px;
}

.cs-cta__actions {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ============================================================
   FILTER JAVASCRIPT BEHAVIOR — hidden state
   ============================================================ */

.cs-card[data-hidden] {
  display: none;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 960px) {

  .cs-grid__cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-featured__case {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }

  .cs-featured__case--reverse {
    direction: ltr;
  }

  .cs-featured__stats-row {
    gap: var(--sp-3);
  }

  .cs-stats__grid {
    gap: var(--sp-4);
  }

  .cs-stats__divider {
    display: none;
  }

  .cs-cta__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {

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

  .cs-hero__title {
    font-size: 32px;
  }

  .cs-hero__cta-group {
    flex-direction: column;
  }

  .cs-cta__actions {
    flex-direction: column;
    width: 100%;
  }

  .cs-cta__actions .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .cs-filter {
    gap: 6px;
  }

  .cs-filter__btn {
    font-size: var(--text-xs);
    padding: 6px 12px;
  }
}