/* Job lifecycle — the canonical convention for a background job's life:
   the state-machine path, heartbeat reaping, retries, uniqueness lock, and the
   terminal/DLQ policy. Diagrams bespoke to this one page; module.css carries
   the chrome and the .section / .decision-box :target landing flash.
   Loaded by lifecycle.html on top of module.css.
   Placement convention: docs/architecture/README.md §Styling. */

/* ═══════════════════════════════════════════
   State machine — the job's path
   ═══════════════════════════════════════════ */
.sm {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

/* A state node — pill-shaped, colored by phase. */
.sm__state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
  min-width: 6.5rem;
  padding: 0.5rem 0.7rem;
  background: var(--st-bg, var(--surface));
  border: 1px solid var(--border);
  border-left: 4px solid var(--st-c, var(--accent));
  border-radius: var(--radius-md);
}

.sm__name {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--st-c, var(--text));
}

.sm__d {
  font-size: 0.68rem;
  color: var(--text-dim);
  line-height: 1.3;
}

/* Phase accents: queued (neutral) · running (live) · success · failure. */
.sm__state--queued {
  --st-c: var(--text-muted);
}
.sm__state--running {
  --st-c: var(--s2);
  --st-bg: var(--s2-pale);
}
.sm__state--ok {
  --st-c: var(--s3);
  --st-bg: var(--s3-pale);
}
.sm__state--fail {
  --st-c: var(--s1);
}
/* Reaping is a post-terminal STEP, not one of the four persisted states in the
   run contract — dashed and muted so it reads apart from the state pills. */
.sm__step {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
  min-width: 6.5rem;
  padding: 0.5rem 0.7rem;
  background: var(--paper);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
}

.sm__step .sm__name {
  color: var(--text-muted);
}

/* Connector arrow between states; carries an optional edge label above. */
.sm__edge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  flex: 0 0 auto;
  padding: 0 0.1rem;
}

.sm__edge::after {
  content: "→";
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1;
}

.sm__lbl {
  font-family: var(--mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

/* A split where running forks into success vs failure. */
.sm__fork {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* Caption under the diagram restating the idempotency invariant. */
.sm-note {
  margin-top: 0.55rem;
}

/* ═══════════════════════════════════════════
   Two-column compare (heartbeat states · retry tiers · terminal homes)
   ═══════════════════════════════════════════ */
.duo {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  margin-top: 0.4rem;
}

.duo__col {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.65rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--duo-c, var(--accent));
  border-radius: var(--radius-md);
}

.duo__col--live {
  --duo-c: var(--s3);
}
.duo__col--dead {
  --duo-c: var(--s1);
}
.duo__col--short {
  --duo-c: var(--s2);
}
.duo__col--long {
  --duo-c: var(--s4);
}

.duo__h {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--duo-c, var(--accent));
}

.duo__t {
  font-size: 0.72rem;
  font-style: italic;
  color: var(--text-dim);
}

.duo__d {
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.45;
}

@media (max-width: 680px) {
  .duo {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════
   Reliability defaults — a compact spec grid
   ═══════════════════════════════════════════ */
.spec {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 0.9rem;
  margin-top: 0.5rem;
  font-size: 0.78rem;
}

.spec__k {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text);
}

.spec__v {
  color: var(--text-dim);
  line-height: 1.4;
}

/* ═══════════════════════════════════════════
   DLQ policy — per-module terminal homes
   ═══════════════════════════════════════════ */
.dlq {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.45rem;
}

.dlq__row {
  display: grid;
  grid-template-columns: max-content 1fr;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.5rem 0.7rem;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.dlq__home {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--s3);
}

.dlq__d {
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.4;
}

/* Tighter bullet rhythm for in-block rule lists, matching the kit. */
.lc-rules {
  margin-top: 0.4rem;
}