/* ═══════════════════════════════════════════════════════════
   Case Study Page — Shared Component CSS
   Loaded after assets/site.css. Tokens come from there.
═══════════════════════════════════════════════════════════ */

/* Active link styling (site.css doesn't define) */
.nav-links a.active { color: var(--ink); font-weight: 600; }

/* ─────────────────────────────
   1. CASE STUDY HERO
───────────────────────────── */
.cs-hero {
  background: var(--bg-warm);
  border-bottom: 1px solid var(--border);
  padding-top: clamp(110px, 14vw, 150px);
  padding-bottom: clamp(48px, 6vw, 72px);
}

.cs-hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 22px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--accent);
}

.cs-hero-meta-sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--ink-faint);
}

.cs-hero-meta-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  background: rgba(13, 18, 15, 0.06);
  padding: 4px 10px;
  border-radius: var(--r-pill);
}

.cs-hero-h1 {
  font-size: clamp(32px, 4.6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--ink);
  max-width: 880px;
  margin-bottom: 22px;
}

.cs-hero-h1 em {
  font-style: normal;
  color: var(--accent);
}

.cs-hero-lede {
  font-size: clamp(16px, 1.2vw, 18px);
  color: var(--ink-mid);
  line-height: 1.7;
  max-width: 720px;
  margin-bottom: 32px;
}

.cs-hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ─────────────────────────────
   2. KPI BAND (just below hero)
───────────────────────────── */
.cs-kpi-band {
  background: var(--ink);
  color: var(--on-dark-strong);
  padding: 36px 0;
}

.cs-kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 740px) {
  .cs-kpi-row { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

.cs-kpi {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cs-kpi-val {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  color: var(--accent-on-dark);
  letter-spacing: -0.025em;
  line-height: 1;
}

.cs-kpi-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-dark-mute);
  margin-top: 4px;
}

/* ─────────────────────────────
   3. VISUAL BAND — full-width image or custom mock
───────────────────────────── */
.cs-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7;
  max-height: 560px;
  background: var(--bg-warm);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.cs-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.92) contrast(0.96);
}

.cs-visual-mock {
  background: var(--bg-warm);
  padding: 48px clamp(20px, 5vw, 72px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cs-visual-caption {
  position: absolute;
  bottom: 18px;
  left: clamp(20px, 5vw, 72px);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(13, 18, 15, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 6px 12px;
  border-radius: var(--r-sm);
}

/* ─────────────────────────────
   4. BODY LAYOUT
───────────────────────────── */
.cs-body {
  padding: clamp(56px, 7vw, 88px) 0 clamp(72px, 9vw, 112px);
}

.cs-body-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 80px;
  align-items: start;
}

@media (max-width: 900px) {
  .cs-body-grid { grid-template-columns: 1fr; gap: 40px; }
}

.cs-content {
  max-width: 720px;
}

.cs-section {
  margin-bottom: 44px;
}

.cs-section:last-child {
  margin-bottom: 0;
}

.cs-section-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.cs-section-h2 {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 16px;
}

.cs-section p {
  font-size: 16px;
  color: var(--ink-mid);
  line-height: 1.75;
  margin-bottom: 16px;
}

.cs-section p:last-child {
  margin-bottom: 0;
}

.cs-section p strong {
  color: var(--ink);
  font-weight: 700;
}

/* Component list (what we built) */
.cs-components {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border-mid);
  margin-top: 8px;
}

.cs-component {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.cs-component-num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  padding-top: 3px;
}

.cs-component-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.005em;
  margin-bottom: 4px;
}

.cs-component-desc {
  font-size: 14px;
  color: var(--ink-mid);
  line-height: 1.65;
}

/* Timeline */
.cs-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 8px;
  border-top: 1px solid var(--border-mid);
}

.cs-timeline-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.cs-timeline-when {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 2px;
}

.cs-timeline-what {
  font-size: 14.5px;
  color: var(--ink-mid);
  line-height: 1.6;
}

.cs-timeline-what strong {
  color: var(--ink);
  font-weight: 700;
}

/* Pull quote */
.cs-pull {
  margin: 32px 0;
  padding: 24px 28px;
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.cs-pull p {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.5;
  color: var(--ink);
  margin: 0;
}

.cs-pull p em {
  font-style: italic;
  color: var(--ink-mid);
  font-weight: 500;
}

.cs-pull-attr {
  font-size: 12.5px;
  color: var(--ink-muted);
  margin-top: 10px;
  font-style: italic;
}

/* ─────────────────────────────
   5. SIDEBAR — sticky meta panel
───────────────────────────── */
.cs-sidebar {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.cs-sidebar-card {
  background: #fff;
  border: 1px solid var(--border-mid);
  border-radius: var(--r-lg);
  padding: 22px 24px;
}

.cs-sidebar-eyebrow {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.cs-sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cs-sidebar-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.cs-sidebar-row:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.cs-sidebar-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.cs-sidebar-val {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.005em;
}

.cs-sidebar-val.accent {
  color: var(--accent);
}

.cs-sidebar-cta {
  background: var(--ink);
  color: var(--on-dark-strong);
  border-radius: var(--r-lg);
  padding: 22px 24px;
}

.cs-sidebar-cta-text {
  font-size: 14px;
  color: var(--on-dark);
  line-height: 1.55;
  margin-bottom: 14px;
}

.cs-sidebar-cta-text strong {
  color: #fff;
  font-weight: 700;
}

@media (max-width: 900px) {
  .cs-sidebar { position: static; }
}

/* ─────────────────────────────
   6. CTA + RELATED
───────────────────────────── */
.cs-cta-band {
  background: var(--bg-dark);
  padding: clamp(56px, 7vw, 88px) 0;
  text-align: center;
  border-top: 1px solid var(--border-on-dark);
}

.cs-cta-pre {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-on-dark);
  margin-bottom: 14px;
}

.cs-cta-h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 14px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.cs-cta-sub {
  font-size: 16px;
  color: var(--on-dark-mute);
  line-height: 1.65;
  max-width: 540px;
  margin: 0 auto 28px;
}

.cs-cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Related case studies */
.cs-related {
  border-top: 1px solid var(--border);
  padding: clamp(48px, 6vw, 72px) 0;
}

.cs-related-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 24px;
}

.cs-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 800px) {
  .cs-related-grid { grid-template-columns: 1fr; }
}

.cs-related-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 26px;
  background: #fff;
  border: 1px solid var(--border-mid);
  border-radius: var(--r-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur-hover) var(--ease-snap),
              transform var(--dur-hover) var(--ease-snap),
              box-shadow var(--dur-hover) var(--ease-snap);
}

@media (hover: hover) and (pointer: fine) {
  .cs-related-card:hover {
    border-color: rgba(21, 128, 61, 0.32);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(13, 18, 15, 0.06);
  }
}

.cs-related-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--accent);
}

.cs-related-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--ink);
}

.cs-related-arrow {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--dur-hover) var(--ease-snap);
}

@media (hover: hover) and (pointer: fine) {
  .cs-related-card:hover .cs-related-arrow { gap: 10px; }
}