/* ============================================================
   CASE STUDY SHARED STYLES
   ============================================================ */

/* ── CASE STUDY HEADER ── */
.cs-page-header {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 9rem 3rem 5rem;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.cs-page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, rgba(122, 158, 142, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.cs-page-header-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.cs-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--muted-2);
  text-decoration: none;
  margin-bottom: 3rem;
  transition: color 0.2s;
}
.cs-back-link:hover { color: var(--accent); }
.cs-back-link::before { content: '←'; font-size: 0.85rem; }

.cs-page-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.cs-page-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--accent-3);
}

.cs-page-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 1.75rem;
}
.cs-page-title em {
  font-style: italic;
  color: var(--accent-2);
}

.cs-page-hook {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  font-weight: 300;
  color: var(--muted);
  max-width: 620px;
  line-height: 1.85;
}

/* ── CASE STUDY STATS BAR ── */
.cs-stats-bar {
  background: var(--bg-3);
  border-top: 1px solid var(--border-2);
  border-bottom: 1px solid var(--border-2);
  padding: 2.5rem 3rem;
}
.cs-stats-bar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  gap: 0;
  flex-wrap: wrap;
}
.cs-stats-bar .cs-stat {
  flex: 1;
  min-width: 120px;
  padding: 0 2.5rem;
  border-right: 1px solid var(--border);
}
.cs-stats-bar .cs-stat:first-child { padding-left: 0; }
.cs-stats-bar .cs-stat:last-child { border-right: none; }

/* ── CASE STUDY BODY ── */
.cs-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 3rem;
}

.cs-section {
  margin-bottom: 5rem;
}

.cs-section-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.cs-section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.cs-section-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 1.75rem;
}
.cs-section-heading em {
  font-style: italic;
  color: var(--accent-2);
}

.cs-prose {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.9;
  max-width: 680px;
}
.cs-prose p { margin-bottom: 1.25rem; }
.cs-prose p:last-child { margin-bottom: 0; }
.cs-prose strong { color: var(--ink); font-weight: 400; }
.cs-prose em { color: var(--ink-2); }

/* ── TWO-COLUMN LAYOUT ── */
.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.cs-two-col-wide {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: start;
}

/* ── CALLOUT BOX ── */
.cs-callout {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-left: 3px solid var(--accent);
  padding: 2rem 2.5rem;
  margin: 2rem 0;
}
.cs-callout-label {
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.cs-callout-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.65;
}

/* ── QUOTE BLOCK ── */
.cs-blockquote {
  background: var(--bg-2);
  border-left: 2px solid var(--accent-3);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
}
.cs-blockquote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--ink-2);
  line-height: 1.7;
  margin-bottom: 0.75rem;
}
.cs-blockquote cite {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-style: normal;
}

/* ── METRIC CARDS ── */
.cs-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  margin: 2rem 0;
}
.cs-metric-card {
  background: var(--bg-2);
  padding: 2rem 1.75rem;
}
.cs-metric-n {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.cs-metric-l {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.5;
}
.cs-metric-sub {
  font-size: 0.65rem;
  color: var(--muted-2);
  margin-top: 0.25rem;
}

/* ── PROCESS STEPS ── */
.cs-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 2rem 0;
}
.cs-step {
  display: flex;
  gap: 2rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
}
.cs-step:first-child { border-top: 1px solid var(--border); }
.cs-step-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.8rem;
  color: var(--border-3);
  line-height: 1;
  min-width: 2.5rem;
  padding-top: 0.1rem;
}
.cs-step-content { flex: 1; }
.cs-step-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.cs-step-body {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.8;
}

/* ── ARTIFACT LIST ── */
.cs-artifact-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
  margin: 2rem 0;
}
.cs-artifact-item {
  background: var(--bg-2);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.cs-artifact-tag {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  border: 1px solid var(--border-2);
  padding: 0.15rem 0.5rem;
  min-width: 80px;
  text-align: center;
}
.cs-artifact-name {
  font-size: 0.85rem;
  color: var(--ink-2);
  flex: 1;
}
.cs-artifact-note {
  font-size: 0.75rem;
  color: var(--muted-2);
}

/* ── OUTCOME BOX ── */
.cs-outcome-box {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  padding: 3rem;
  margin-top: 3rem;
}
.cs-outcome-label {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.cs-outcome-text {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.7;
  margin-bottom: 2rem;
}
.cs-outcome-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

/* ── NEXT CASE STUDY ── */
.cs-next {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 4rem 3rem;
}
.cs-next-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}
.cs-next-label {
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 0.5rem;
}
.cs-next-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--ink);
}

/* ── METRICS TABLE ── */
.cs-metrics-table {
  max-width: 640px;
  border-top: 1px solid var(--border);
}
.cs-metrics-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--muted);
  align-items: center;
}
.cs-metrics-header {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
}
.cs-metrics-val {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent);
  text-align: right;
  white-space: nowrap;
}

/* ── CASE STUDY PAGINATION NAV ── */
.cs-pagination {
  position: static !important;
  border-top: 1px solid var(--border);
  padding: 2.5rem 3rem;
  background: var(--bg-2);
}
.cs-pagination-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
}
.cs-pag-prev,
.cs-pag-next {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s;
  min-width: 0;
}
.cs-pag-prev:hover,
.cs-pag-next:hover { color: var(--ink); }
.cs-pag-next { justify-content: flex-end; text-align: right; }
.cs-pag-arrow {
  font-size: 1rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s;
}
.cs-pag-prev:hover .cs-pag-arrow { transform: translateX(-3px); }
.cs-pag-next:hover .cs-pag-arrow { transform: translateX(3px); }
.cs-pag-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}
.cs-pag-label {
  font-family: var(--font-sans);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
}
.cs-pag-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--ink);
  white-space: normal;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 28ch;
}
.cs-pag-all {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s;
}
.cs-pag-all:hover { color: var(--ink); border-color: var(--muted); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .cs-page-header { padding: 8rem 2rem 4rem; }
  .cs-stats-bar { padding: 2rem; }
  .cs-stats-bar-inner { gap: 2rem; }
  .cs-stats-bar .cs-stat {
    padding: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.5rem;
  }
  .cs-stats-bar .cs-stat:last-child { border-bottom: none; }
  .cs-body { padding: 4rem 2rem; }
  .cs-two-col, .cs-two-col-wide { grid-template-columns: 1fr; gap: 2.5rem; }
  .cs-metrics-grid { grid-template-columns: 1fr 1fr; }
  .cs-next { padding: 3rem 2rem; }
  .cs-next-inner { flex-direction: column; align-items: flex-start; }
  .cs-pagination { padding: 1.75rem 2rem; }
  .cs-pag-title { font-size: 0.85rem; }
}

@media (max-width: 600px) {
  .cs-page-header { padding: 7rem 1.5rem 3rem; }
  .cs-pagination { padding: 1.5rem; }
  .cs-pagination-inner { grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; gap: 1rem; }
  .cs-pag-all { grid-column: 1 / -1; order: -1; }
  .cs-pag-title { display: none; }
  .cs-stats-bar { padding: 1.75rem 1.5rem; }
  .cs-body { padding: 3rem 1.5rem; }
  .cs-metrics-grid { grid-template-columns: 1fr; }
  .cs-outcome-stats { flex-direction: column; gap: 1.5rem; }
}