/* ── Playbook: Hero ──────────────────────────────────── */
.playbook-hero {
  text-align: center;
  padding: 64px 0 48px;
}
.playbook-hero h1 { font-size: 3.2rem; }
.playbook-hero .subtitle { margin: 12px auto 0; max-width: 600px; }

/* ── Playbook: Stage Navigation ──────────────────────── */
.stage-nav {
  display: flex;
  gap: 0;
  margin: 48px 0 0;
  flex-wrap: wrap;
  justify-content: center;
}
.stage-nav a {
  padding: 12px 20px;
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.2s;
  text-align: center;
}
.stage-nav a:first-child { border-radius: 10px 0 0 10px; }
.stage-nav a:last-child { border-radius: 0 10px 10px 0; }
.stage-nav a:hover {
  color: #e0e0e8;
  background: rgba(99,102,241,0.08);
  border-color: rgba(99,102,241,0.2);
}
.stage-nav .stage-num {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #818cf8;
  margin-bottom: 2px;
}

/* ── Playbook: Stage Sections ────────────────────────── */
.playbook-stage {
  padding: 64px 0;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.playbook-stage .stage-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.playbook-stage .stage-number {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.playbook-stage .stage-header h2 { margin-bottom: 0; }
.playbook-stage .stage-meta {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: 24px;
}

/* Stage number colors */
.stage-1 .stage-number { background: linear-gradient(135deg, #6366f1, #818cf8); }
.stage-2 .stage-number { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.stage-3 .stage-number { background: linear-gradient(135deg, #7c3aed, #c084fc); }
.stage-4 .stage-number { background: linear-gradient(135deg, #c084fc, #e879f9); }
.stage-5 .stage-number { background: linear-gradient(135deg, #ec4899, #f472b6); }
.stage-6 .stage-number { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.stage-7 .stage-number { background: linear-gradient(135deg, #10b981, #34d399); }

/* ── Playbook: Link to research ──────────────────────── */
.see-more-link {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 24px;
  border-radius: 8px;
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.2);
  color: #818cf8;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}
.see-more-link:hover {
  background: rgba(99,102,241,0.15);
}

/* ── Playbook: Optimization cadence ──────────────────── */
.cadence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 24px 0;
}
.cadence-item {
  padding: 20px 16px;
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  text-align: center;
}
.cadence-item .cadence-day {
  font-size: 1.4rem;
  font-weight: 800;
  color: #c4b5fd;
  margin-bottom: 4px;
}
.cadence-item .cadence-action {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
}

@media (max-width: 768px) {
  .playbook-hero h1 { font-size: 2.4rem; }
  .playbook-hero { padding: 40px 0 32px; }
  .stage-nav { flex-wrap: wrap; }
  .stage-nav a { flex: 1; min-width: calc(25% - 2px); border-radius: 0 !important; font-size: 0.7rem; padding: 10px 8px; }
  .cadence-grid { grid-template-columns: repeat(2, 1fr); }
  .playbook-stage .stage-header { flex-direction: column; align-items: flex-start; gap: 8px; }
}