/* Case studies — shared styles for /case-studies and /case-studies/[slug] */

:root {
  --neb-cyan: #22d3ee;
  --neb-purple: #8b5cf6;
  --neb-pink: #ec4899;
  --cs-bg: rgba(255,255,255,0.04);
  --cs-border: rgba(255,255,255,0.1);
}

/* Scroll performance — globalny background-attachment: fixed na body z 6 stacked
   radial-gradientami + body::before noise overlay z mix-blend-mode powodował
   jank przy scrollu. Lokalne nadpisanie tylko na case-studies routes. */
body {
  background-attachment: scroll !important;
}
body::before {
  display: none !important;
}

.cs-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* INDEX HERO */
.cs-hero {
  text-align: center;
  margin-bottom: 3rem;
}
.cs-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--neb-cyan) 0%, #a78bfa 50%, #f472b6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}
.cs-hero .lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.7);
  max-width: 720px;
  margin: 0 auto;
}
.cs-hero .meta {
  margin-top: 0.8rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.5px;
}

/* INDEX GRID */
.cs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
  margin-bottom: 3rem;
}
@media (min-width: 860px) {
  .cs-grid { grid-template-columns: repeat(3, 1fr); }
}

.cs-card {
  display: flex;
  flex-direction: column;
  background: var(--cs-bg);
  border: 1px solid var(--cs-border);
  border-radius: 16px;
  padding: 1.6rem 1.5rem 1.4rem;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.cs-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background: radial-gradient(ellipse 400px 200px at 0% 0%, var(--cs-accent, rgba(34,211,238,0.16)), transparent 60%);
}
.cs-card[data-accent="cyan"]   { --cs-accent: rgba(34,211,238,0.18); }
.cs-card[data-accent="purple"] { --cs-accent: rgba(139,92,246,0.22); }
.cs-card[data-accent="pink"]   { --cs-accent: rgba(236,72,153,0.18); }

.cs-card:hover {
  transform: translateY(-2px);
  border-color: rgba(139,92,246,0.45);
  box-shadow: 0 12px 36px rgba(0,0,0,0.35);
}

.cs-card-sector {
  position: relative;
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 700;
  color: rgba(255,255,255,0.55);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  align-self: flex-start;
  margin-bottom: 1rem;
  z-index: 2;
}
.cs-card[data-accent="cyan"]   .cs-card-sector { color: var(--neb-cyan); border-color: rgba(34,211,238,0.32); }
.cs-card[data-accent="purple"] .cs-card-sector { color: #a78bfa; border-color: rgba(139,92,246,0.4); }
.cs-card[data-accent="pink"]   .cs-card-sector { color: #f472b6; border-color: rgba(236,72,153,0.4); }

.cs-card-title {
  position: relative;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 0.7rem;
  z-index: 2;
}
.cs-card-hook {
  position: relative;
  font-size: 0.92rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.68);
  margin-bottom: 1.4rem;
  z-index: 2;
}

.cs-card-metrics {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: auto;
  margin-bottom: 1.1rem;
  z-index: 2;
}
/* Each metric block ma stałą min-height, żeby liczby (val) ustawiały się
   na tej samej wysokości we wszystkich kartach niezależnie od długości .lbl. */
.cs-card-metric {
  min-height: 92px;
  display: flex;
  flex-direction: column;
}
.cs-card-metric .val {
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--neb-cyan) 0%, #a78bfa 50%, #f472b6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cs-card-metric .lbl {
  font-size: 0.76rem;
  line-height: 1.35;
  color: rgba(255,255,255,0.55);
  margin-top: 0.25rem;
}

.cs-card-cta {
  position: relative;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--neb-cyan);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.cs-card-cta::after {
  content: "→";
  transition: transform 0.2s ease;
}
.cs-card:hover .cs-card-cta::after { transform: translateX(4px); }

/* INDEX BOTTOM CTA */
.cs-bottom-cta {
  margin: 2rem auto 0;
  max-width: 720px;
  text-align: center;
  background: linear-gradient(135deg, rgba(34,211,238,0.1), rgba(139,92,246,0.14), rgba(236,72,153,0.1));
  border: 1px solid rgba(139,92,246,0.35);
  border-radius: 18px;
  padding: 2rem 1.6rem;
}
.cs-bottom-cta h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.6rem;
  line-height: 1.25;
}
.cs-bottom-cta p {
  color: rgba(255,255,255,0.7);
  font-size: 0.98rem;
  line-height: 1.55;
  margin-bottom: 1.2rem;
}
.cs-bottom-cta .btn {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #fff;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  text-decoration: none;
  background: linear-gradient(135deg, var(--neb-cyan), var(--neb-purple), var(--neb-pink));
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.cs-bottom-cta .btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(139,92,246,0.4);
}

/* ====== DETAIL PAGE ====== */

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  margin-bottom: 1.4rem;
  transition: color 0.2s ease;
}
.cs-back:hover { color: var(--neb-cyan); }
.cs-back::before { content: "←"; }

.cs-detail-header {
  margin-bottom: 2.5rem;
}
.cs-detail-sector {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.7);
  margin-bottom: 1.2rem;
}
[data-accent="cyan"]   .cs-detail-sector { color: var(--neb-cyan); border-color: rgba(34,211,238,0.32); }
[data-accent="purple"] .cs-detail-sector { color: #a78bfa; border-color: rgba(139,92,246,0.4); }
[data-accent="pink"]   .cs-detail-sector { color: #f472b6; border-color: rgba(236,72,153,0.4); }

.cs-detail-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 1rem;
  max-width: 900px;
}
.cs-detail-subtitle {
  font-size: 1.05rem;
  line-height: 1.55;
  color: rgba(255,255,255,0.72);
  max-width: 800px;
}
.cs-detail-meta {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
}
.cs-detail-meta strong {
  color: rgba(255,255,255,0.85);
  font-weight: 600;
  margin-right: 0.35rem;
}

/* Metrics row */
.cs-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 0 0 2.5rem;
  background: linear-gradient(135deg, rgba(34,211,238,0.08), rgba(139,92,246,0.12), rgba(236,72,153,0.08));
  border: 1px solid rgba(139,92,246,0.32);
  border-radius: 16px;
  padding: 1.4rem;
}
@media (min-width: 760px) {
  .cs-metrics { grid-template-columns: repeat(4, 1fr); }
}
.cs-metric .val {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--neb-cyan) 0%, #a78bfa 50%, #f472b6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cs-metric .lbl {
  font-size: 0.82rem;
  line-height: 1.4;
  color: rgba(255,255,255,0.65);
  margin-top: 0.5rem;
}

/* Sections */
.cs-section {
  margin-bottom: 2.5rem;
}
.cs-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.1rem;
}
.cs-section h2::before {
  content: "";
  display: inline-block;
  width: 24px; height: 2px;
  background: linear-gradient(90deg, var(--neb-cyan), var(--neb-purple), var(--neb-pink));
  vertical-align: middle;
  margin-right: 0.8rem;
  transform: translateY(-3px);
}

.cs-section p {
  font-size: 1rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.78);
  margin-bottom: 0.9rem;
  max-width: 900px;
}

.cs-approach {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}
@media (min-width: 760px) {
  .cs-approach { grid-template-columns: 1fr 1fr; }
}
.cs-approach-item {
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
}
.cs-approach-item h3 {
  font-size: 1.02rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.45rem;
  line-height: 1.3;
}
.cs-approach-item p {
  font-size: 0.93rem;
  line-height: 1.55;
  color: rgba(255,255,255,0.7);
  margin: 0;
}

.cs-results {
  list-style: none;
  padding: 0;
  margin: 0;
}
.cs-results li {
  position: relative;
  padding: 0.8rem 0 0.8rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.98rem;
  line-height: 1.55;
  color: rgba(255,255,255,0.78);
}
.cs-results li:last-child { border-bottom: 0; }
.cs-results li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neb-cyan), var(--neb-purple), var(--neb-pink));
  color: #fff;
  font-weight: 700;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cs-transferable {
  background: rgba(255,255,255,0.035);
  border-left: 3px solid var(--neb-cyan);
  padding: 1.2rem 1.4rem;
  border-radius: 4px;
  font-size: 1rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.82);
  max-width: 900px;
}
[data-accent="purple"] .cs-transferable { border-left-color: var(--neb-purple); }
[data-accent="pink"]   .cs-transferable { border-left-color: var(--neb-pink); }

.cs-reference {
  margin-top: 1.4rem;
  padding: 0.9rem 1.1rem;
  background: rgba(34,211,238,0.06);
  border: 1px dashed rgba(34,211,238,0.4);
  border-radius: 10px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.78);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.cs-reference::before {
  content: "📄";
  font-size: 1.15rem;
}

/* Cross-link / related */
.cs-related {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--cs-border);
}
.cs-related-label {
  font-size: 0.78rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-weight: 700;
  margin-bottom: 1rem;
}
.cs-related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 760px) {
  .cs-related-grid { grid-template-columns: 1fr 1fr; }
}
.cs-related-card {
  display: block;
  padding: 1rem 1.1rem;
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s;
}
.cs-related-card:hover {
  border-color: rgba(139,92,246,0.4);
  transform: translateY(-1px);
}
.cs-related-card .sector {
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.35rem;
}
.cs-related-card .title {
  font-size: 0.98rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}