.quick-start-shell {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px 72px;
}

.quick-start-hero {
  padding: clamp(28px, 6vw, 58px);
  border-radius: 32px;
  color: #fff;
  background: #111827;
  box-shadow: var(--shadow);
}

.quick-start-hero .eyebrow { color: #a78bfa; }
.quick-start-hero h1 { margin: 0; max-width: 820px; font-size: clamp(34px, 6vw, 62px); line-height: 1.15; }
.quick-start-hero h1 span { color: #34d399; }
.quick-start-hero > p { max-width: 760px; color: #cbd5e1; font-size: 17px; }

.quick-start-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 22px;
}

.quick-start-nav a {
  padding: 9px 13px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  font-size: 12px;
  font-weight: 800;
}

.quick-start-nav a:hover { background: rgba(255,255,255,.09); }

.quick-start-section {
  margin-top: 34px;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--border);
  border-radius: 26px;
  background: var(--surface);
}

.quick-start-section h2 { margin: 0; font-size: clamp(26px, 4vw, 38px); line-height: 1.35; }
.quick-start-section > p { color: var(--muted); }

.activation-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.activation-steps li {
  padding: 17px;
  border: 1px solid var(--border);
  border-radius: 17px;
  background: var(--surface-soft);
}

.activation-steps span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  border-radius: 11px;
  color: #fff;
  background: var(--primary);
  font-weight: 900;
}

.activation-steps strong { display: block; }
.activation-steps p { margin: 6px 0 0; color: var(--muted); font-size: 12px; }

.evidence-layers {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.evidence-layers div {
  padding: 14px;
  border-radius: 15px;
  background: color-mix(in srgb, var(--warning) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--warning) 26%, var(--border));
}

.evidence-layers strong { display: block; font-size: 13px; }
.evidence-layers span { color: var(--muted); font-size: 11px; }

.setup-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.setup-card {
  padding: 17px;
  border: 1px solid var(--border);
  border-radius: 17px;
  background: var(--surface-soft);
}

.setup-card h3 { margin: 0 0 6px; }
.setup-card p { margin: 0; color: var(--muted); font-size: 13px; }

.code-example {
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  background: #0b1020;
}

.code-example summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 17px;
  cursor: pointer;
  color: #f8fafc;
  background: #111827;
  font-weight: 900;
}

.code-example summary small { color: #94a3b8; font-weight: 500; }
.code-example pre { margin: 0; padding: 20px; overflow-x: auto; direction: ltr; text-align: left; color: #dbeafe; font-size: 13px; line-height: 1.75; }

.code-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 15px;
  border-top: 1px solid #243047;
  color: #94a3b8;
  background: #111827;
  font-size: 11px;
}

.code-actions .copy-button {
  border: 1px solid #475569;
  border-radius: 10px;
  padding: 7px 12px;
  color: #fff;
  background: #1e293b;
  font-weight: 800;
}

.success-checks,
.error-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.success-checks article,
.error-map article {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-soft);
}

.success-checks h3,
.error-map h3 { margin: 0 0 5px; font-size: 17px; }
.success-checks p,
.error-map p { margin: 0; color: var(--muted); font-size: 13px; }

.quick-start-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 34px;
  padding: 26px;
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(135deg, #6d3df5, #4338ca);
}

.quick-start-cta h2 { margin: 0; }
.quick-start-cta p { margin: 5px 0 0; color: #ddd6fe; }
.quick-start-cta .button { flex: 0 0 auto; background: #fff; color: #4338ca; }

@media (max-width: 900px) {
  .activation-steps,
  .evidence-layers { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .setup-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .quick-start-shell { padding-inline: 16px; }
  .activation-steps,
  .evidence-layers,
  .success-checks,
  .error-map { grid-template-columns: 1fr; }
  .code-example summary,
  .code-actions,
  .quick-start-cta { align-items: flex-start; flex-direction: column; }
}