/* ────────────────────────────────────────────────────────────
   Job Systems Tutorial · Extra styles
   Builds on tutorial.css; only adds what's specific to this page.
   ──────────────────────────────────────────────────────────── */

/* ── History timeline (§2) ── */
.timeline-block {
  margin: 1.5rem 0 2rem;
  border-left: 2px solid var(--tut-border);
  padding-left: 1.3rem;
  display: grid;
  gap: 1.1rem;
}

.timeline-row {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1rem;
  align-items: start;
}

.timeline-year {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--tut-accent);
  font-weight: 700;
  letter-spacing: 0.05em;
  position: relative;
  padding-top: 0.05rem;
}

.timeline-year::before {
  content: '';
  position: absolute;
  left: -1.42rem;
  top: 0.45rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tut-accent);
  box-shadow: 0 0 0 4px rgba(167, 139, 250, 0.18);
}

.timeline-body {
  font-size: 0.97rem;
  line-height: 1.6;
  color: var(--tut-soft);
}

.timeline-body strong {
  color: var(--tut-text);
}

@media (max-width: 640px) {
  .timeline-block { padding-left: 1rem; }
  .timeline-row { grid-template-columns: 50px 1fr; gap: 0.5rem; }
  .timeline-year::before { left: -1.12rem; }
}

/* ── DAG SVG (§8) ── */
.dag-diagram {
  display: block;
  margin: 1.5rem auto;
  max-width: 100%;
}

/* ── Playground layout (§11) ── */
.playground-right {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0.6rem;
  height: 100%;
  min-width: 0;
}

.playground-right canvas {
  background: #07070d;
  border-radius: 6px;
  border: 1px solid var(--tut-border-soft);
  width: 100%;
  display: block;
}

#widget-job-playground .playground-body {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 760px) {
  #widget-job-playground .playground-body {
    grid-template-columns: 1fr;
  }
  .playground-right canvas { aspect-ratio: 2 / 1; }
}

/* ── Fixed vs Jobs widget toggle states ── */
#widget-fixed-vs-jobs .toggle-group button.active {
  color: var(--tut-accent);
  border-color: var(--tut-accent);
}

/* ── Stat grid override for false-sharing widget so it can show three stats wide on desktop ── */
#widget-false-sharing .stat-grid {
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

/* ── Inline math helper ── */
.math .num,
.math-block .num {
  font-family: var(--math);
}

/* ── A subtle hover state for code language tabs already covers C++ and Rust; */
/*    the data-lang colors are inherited from tutorial.css.                  */

/* ── DAG widget canvas needs to be tall enough to render nodes ── */
#widget-dag canvas {
  background: #07070d;
}

/* ── Fiber widget status box reuses look-and-feel ── */
[data-fb-status] {
  white-space: pre-wrap;
}

/* ── Tutorial card backgrounds for the index page ── */
.tut-card-visual.jobs-bg {
  background: linear-gradient(135deg, #16213e 0%, #1a3a52 35%, #2e4a7c 75%, #4a3a8a 100%);
  position: relative;
  overflow: hidden;
}

.tut-card-visual.jobs-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(167, 139, 250, 0.25), transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(96, 165, 250, 0.20), transparent 40%);
  pointer-events: none;
}

.tut-card-visual.jobs-bg canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}