/* Case studies pages — shared styles, dark/amber theme.
   Inherits CSS variables from main.css (loaded before this file). */

/* ── Back link ─────────────────────────────────────────────────────────── */
.cs-back {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 24px;
  transition: color 0.15s;
}
.cs-back:hover { color: var(--accent); }

/* ── Hero ──────────────────────────────────────────────────────────────── */
.cs-hero {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 60px 0 48px;
}
.cs-hero__inner { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.cs-hero__eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.cs-hero__headline {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 12px;
  color: var(--text);
}
.cs-hero__sub {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.5;
}

/* ── Index card grid ────────────────────────────────────────────────────── */
.cs-index { padding: 60px 0; }
.cs-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.cs-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  cursor: pointer;
}
.cs-card:not(.cs-card--locked):hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.cs-card--locked { opacity: 0.55; cursor: default; }

.cs-card__header { display: flex; justify-content: space-between; align-items: flex-start; }
.cs-card__eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.cs-card__metric { text-align: right; }
.cs-card__metric-val {
  display: block;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--accent);
}
.cs-card__metric-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.cs-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}
.cs-card__meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.cs-card__headline {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}
.cs-card__footer { margin-top: 8px; }
.cs-card__cta {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent);
}
.cs-card__cta--muted { color: var(--text-muted); }

.cs-index__bottom { text-align: center; }
.cs-index__note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-style: italic;
}

/* ── Article body ─────────────────────────────────────────────────────── */
.cs-body { padding: 60px 0; }
.cs-body .section-inner { max-width: 720px; }

.cs-section { margin-bottom: 52px; }
.cs-section__heading {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.cs-prose p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.cs-prose p:first-child {
  font-size: 1.05rem;
  color: var(--text);
  font-style: italic;
}

/* ── Modules ──────────────────────────────────────────────────────────── */
.cs-modules { display: flex; flex-direction: column; gap: 20px; margin-top: 16px; }
.cs-module {
  display: flex;
  gap: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.cs-module__icon { font-size: 1.6rem; flex-shrink: 0; line-height: 1.3; }
.cs-module__name { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.cs-module__desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.5; }
.cs-module__link {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

/* ── Comparison table ─────────────────────────────────────────────────── */
.cs-table-wrap { overflow-x: auto; }
.cs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.cs-table th {
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 10px 16px;
  border-bottom: 2px solid var(--border);
}
.cs-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  vertical-align: top;
}
.cs-table tr:last-child td { border-bottom: none; }
.cs-table__after {
  color: var(--accent) !important;
  font-weight: 700;
}
.cs-table th.cs-table__after { color: var(--accent); }

/* ── Pull quote ───────────────────────────────────────────────────────── */
.cs-pullquote {
  border-left: 4px solid var(--accent);
  padding: 16px 24px;
  background: var(--bg-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.15rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 0;
}
.cs-pullquote cite {
  display: block;
  margin-top: 12px;
  font-size: 0.82rem;
  font-style: normal;
  color: var(--text-muted);
  font-weight: 600;
}

/* ── Bottom CTA ───────────────────────────────────────────────────────── */
.cs-cta { text-align: center; }
.cs-cta__note {
  margin-top: 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
}