/* ============================================================
   Blueprint AI with Kirk — case-studies.css
   Dark sections matching services page · carousel-style cards
   ============================================================ */

/* ── Page offset below fixed nav ── */
.cs-page { padding-top: var(--nav-height); }

/* ── Shared section base ── */
.cs-hero,
.cs-entry,
.cs-cta {
  position: relative;
  overflow: hidden;
}


/* ══════════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════════ */
.cs-hero {
  background: #010101;
  padding: var(--space-24) 0 var(--space-20);
}

.cs-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 60%, rgba(91,158,201,0.09), transparent 55%);
  pointer-events: none;
}

.cs-hero .container {
  position: relative;
  z-index: 1;
}

.cs-hero .eyebrow { margin-bottom: var(--space-4); }

.cs-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 5.5vw, 4.4rem);
  color: #fff;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: var(--space-4) 0 var(--space-6);
}

.cs-hero h1 span { color: var(--color-ice); }

.cs-hero-sub {
  font-size: var(--text-md);
  font-weight: var(--weight-light);
  color: rgba(255,255,255,0.5);
  max-width: 48ch;
  line-height: var(--leading-loose);
  margin: 0;
}


/* ══════════════════════════════════════════════════════════════
   CASE STUDY ENTRIES — alternating dark sections
   ══════════════════════════════════════════════════════════════ */
.cs-entry {
  background: var(--color-void);
  padding: var(--space-20) 0;
}

.cs-entry + .cs-entry {
  background: #010101;
}

.cs-entry::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 75% 40%, rgba(91,158,201,0.07), transparent 55%);
  pointer-events: none;
}

.cs-entry + .cs-entry::before {
  background: radial-gradient(ellipse at 25% 60%, rgba(91,158,201,0.07), transparent 55%);
}

.cs-entry .container {
  position: relative;
  z-index: 1;
}

/* ── Entry header ── */
.cs-entry-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(91,158,201,0.15);
}

.cs-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-ice);
  background: rgba(91,158,201,0.1);
  border: 1px solid rgba(91,158,201,0.25);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.cs-entry-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  color: #fff;
  margin: 0;
  line-height: var(--leading-tight);
}

.cs-services {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: flex-start;
  padding-top: var(--space-2);
}

.cs-service-pill {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(91,158,201,0.18);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}


/* ══════════════════════════════════════════════════════════════
   CAROUSEL-STYLE CARDS
   ══════════════════════════════════════════════════════════════ */
.cs-blocks {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-5);
  align-items: stretch;
}

/* The card */
.cs-block {
  background: #0D1117;
  border: 1px solid rgba(91,158,201,0.12);
  border-radius: 12px;
  padding: 28px 26px 24px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  transition:
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.cs-block:hover {
  transform: translateY(-4px);
  border-color: rgba(91,158,201,0.3);
  box-shadow: 0 28px 64px rgba(0,0,0,0.6), 0 0 0 1px rgba(91,158,201,0.1);
}

/* Results card — slight blue tint, stronger border */
.cs-block--results {
  background: #0c1520;
  border-color: rgba(91,158,201,0.22);
}

/* ── Decorative blobs (carousel style) ── */
.cs-blob {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.cs-blob--tr {
  background: #5B9EC9;
  width: 90px;
  height: 120px;
  top: -22px;
  right: -18px;
  border-radius: 60% 40% 70% 30% / 50% 60% 40% 50%;
  opacity: 0.7;
}

.cs-blob--slate-br {
  background: #1C2B3A;
  width: 65px;
  height: 80px;
  bottom: -10px;
  right: 18px;
  border-radius: 40% 60% 30% 70% / 60% 30% 70% 40%;
  opacity: 1;
}

.cs-blob--bl {
  background: #5B9EC9;
  width: 75px;
  height: 95px;
  bottom: -14px;
  left: -14px;
  border-radius: 50% 50% 65% 35% / 45% 55% 45% 55%;
  opacity: 0.38;
}

/* ── Card body (z-layer above blobs) ── */
.cs-card-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Eyebrow */
.cs-card-eyebrow {
  display: block;
  font-family: 'Barlow', var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #5B9EC9;
  margin-bottom: 10px;
}

/* Blue rule divider */
.cs-card-rule {
  width: 36px;
  height: 2px;
  background: #5B9EC9;
  border-radius: 2px;
  margin-bottom: 16px;
  flex-shrink: 0;
}

/* Body copy */
.cs-card-copy {
  font-family: 'Barlow', var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: rgba(255,255,255,0.58);
  margin: 0;
}

.cs-card-copy + .cs-card-copy {
  margin-top: 10px;
}

/* ── Step list (What We Built) ── */
.cs-step-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cs-step {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

/* Numbered circle dot */
.cs-step__dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #5B9EC9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Barlow', sans-serif;
  font-size: 11px;
  font-weight: 700;
  color: #0D1117;
  flex-shrink: 0;
  margin-top: 1px;
}

/* Arrow variant for Results */
.cs-step__dot--arrow {
  background: rgba(91,158,201,0.12);
  color: #5B9EC9;
  font-size: 11px;
  font-weight: 400;
  border: 1px solid rgba(91,158,201,0.3);
}

.cs-step__text {
  font-family: 'Barlow', var(--font-sans);
  font-size: 14px;
  color: rgba(255,255,255,0.68);
  line-height: 1.5;
}

.cs-step__text strong {
  color: #fff;
  font-weight: 600;
}

/* Results list text slightly brighter */
.cs-step-list--results .cs-step__text {
  color: rgba(255,255,255,0.82);
}


/* ══════════════════════════════════════════════════════════════
   CTA
   ══════════════════════════════════════════════════════════════ */
.cs-cta {
  background: #010101;
  padding: var(--space-24) 0;
  text-align: center;
}

.cs-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(91,158,201,0.08), transparent 60%);
  pointer-events: none;
}

.cs-cta .container {
  position: relative;
  z-index: 1;
}

.cs-cta .eyebrow { margin-bottom: var(--space-4); }

.cs-cta h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: #fff;
  margin-bottom: var(--space-4);
}

.cs-cta p {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--weight-light);
  color: rgba(255,255,255,0.5);
  max-width: 44ch;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-loose);
}

.cs-cta .nav-cta-pill {
  display: inline-flex;
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-8);
}


/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .cs-blocks {
    grid-template-columns: 1fr 1fr;
  }
  .cs-block--results {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .cs-blocks {
    grid-template-columns: 1fr;
  }
  .cs-block--results {
    grid-column: auto;
  }
  .cs-hero {
    padding: var(--space-16) 0 var(--space-12);
  }
  .cs-entry {
    padding: var(--space-12) 0;
  }
  .cs-cta {
    padding: var(--space-16) 0;
  }
  .cs-entry-header {
    flex-direction: column;
    gap: var(--space-5);
    margin-bottom: var(--space-8);
  }
}