@import url("../../reinforcement_learning/lessons/style.css");

/* Modern GPU Programming — "Feeding the Tensor Core" (Hopper & Blackwell).
   Local helpers layered on the shared RL gold-standard sheet. Do NOT redefine
   shared classes (.widget, .kpi, .callout, .math, .diagram, .toc-card,
   .kpi-grid, .step-pill, table, …). Prefer canvas for anything dynamic. */

.kicker {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

/* "from the MLC course" / source notes — amber left rule */
.source-note { border-left-color: var(--accent-2); }

/* a forced-move banner: the bottleneck this lesson is forced to remove */
.forced {
  border: 1px solid var(--border);
  border-left: 3px solid var(--bad);
  background: var(--bg-elev);
  border-radius: 4px 8px 8px 4px;
  padding: 12px 16px;
  margin: 16px 0;
}
.forced .label {
  font-size: 11px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bad);
  margin-bottom: 4px;
}

/* generation / optimization ladder — stacked rungs with per-rung accent borders */
.gen-ladder { display: grid; gap: 8px; margin: 18px 0; }
.gen-ladder .rung {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--bg-elev);
  padding: 10px 14px;
}
.gen-ladder .rung .lvl { font-family: var(--mono); font-size: 12px; color: var(--accent); font-weight: 600; }
.gen-ladder .rung .desc { color: var(--text-mute); font-size: 13.5px; line-height: 1.45; }
.gen-ladder .rung:nth-child(1) { border-left-color: var(--text-dim); }
.gen-ladder .rung:nth-child(2) { border-left-color: var(--accent); }
.gen-ladder .rung:nth-child(3) { border-left-color: var(--accent-2); }
.gen-ladder .rung:nth-child(4) { border-left-color: var(--ok); }
.gen-ladder .rung:nth-child(5) { border-left-color: #7c3aed; }

/* the contract triad / supply-chain grid — three (or N) equal cards */
.triad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0;
}
.triad div {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elev);
  padding: 12px 14px;
}
.triad strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.triad span { display: block; color: var(--text-mute); font-size: 13px; line-height: 1.45; }

/* the recurring scope / layout / dispatch role chips */
.sld { display: inline-flex; gap: 6px; flex-wrap: wrap; margin: 6px 0; }
.sld .b {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--code-bg);
  color: var(--text-mute);
}
.sld .b.scope    { color: var(--accent); }
.sld .b.layout   { color: var(--accent-2); }
.sld .b.dispatch { color: var(--ok); }

/* toc-card path line (matches ai_compilers) */
.toc-card .path {
  margin-top: 6px;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.4;
}

/* part headers + descriptions on the index (matches gpu_kernels) */
.part-head {
  margin: 36px 0 8px;
  font-size: 13px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-mute);
}
.part-desc { color: var(--text-mute); font-size: 14px; margin: 0 0 12px; }

@media (max-width: 820px) {
  .triad { grid-template-columns: 1fr; }
  .gen-ladder .rung { grid-template-columns: 1fr; }
}