/* ── Heartbeat / Cron Monitor ──────────────────────────────────────── */
.tool-icon--heartbeat {
  background: linear-gradient(135deg, var(--red), var(--purple));
}

.hb-content { max-width: 900px; margin: 0 auto; }

/* CTA row */
.hb-cta-row {
  display: flex; align-items: center; gap: 16px; margin-top: 20px; flex-wrap: wrap;
}
.hb-cta-hint {
  font-size: 13px; color: var(--muted);
}

/* Section */
.hb-section {
  margin-top: 40px;
}
.hb-section h2 {
  font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 20px;
}

/* Steps */
.hb-steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.hb-step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  position: relative;
}
.hb-step-num {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: var(--white); font-size: 14px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.hb-step h3 {
  font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 8px;
}
.hb-step p {
  font-size: 13px; color: var(--muted); line-height: 1.5;
}

/* Code examples */
.hb-examples {
  display: flex; flex-direction: column; gap: 16px;
}
.hb-example {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.hb-example h3 {
  font-size: 13px; font-weight: 600; color: var(--muted2);
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--surface2);
}
.hb-code {
  margin: 0; padding: 14px 16px; overflow-x: auto;
  font-family: var(--mono); font-size: 12px; line-height: 1.6;
  color: var(--text);
}
.hb-code code {
  white-space: pre;
}

/* Use cases */
.hb-usecases {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
.hb-usecase {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.hb-usecase-icon {
  font-size: 24px; display: block; margin-bottom: 8px;
}
.hb-usecase h3 {
  font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 6px;
}
.hb-usecase p {
  font-size: 13px; color: var(--muted); line-height: 1.4;
}

/* Responsive */
@media (max-width: 768px) {
  .hb-steps { grid-template-columns: 1fr; }
  .hb-usecases { grid-template-columns: 1fr; }
  .hb-cta-row { flex-direction: column; align-items: flex-start; }
}