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

/* Build a Large Language Model — From Scratch.
   Local helpers layered on the shared RL gold-standard sheet, mirroring the
   cs336 track's helper set (kicker / source-note / trade-table / lesson-flow /
   position-grid / toc-card path) plus a few build-themed helpers this track
   uses. Do NOT redefine shared classes (.widget, .kpi, .callout, .math,
   .diagram, .topic-grid, .prompt-list, .token-row, .tok, …). */

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

/* the "what the previous step left broken" callout — orange spine */
.source-note {
  border-left-color: var(--accent-2);
}

.position-grid,
.coverage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0;
}

.position-grid div,
.coverage-grid div {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elev);
  padding: 12px 14px;
}

.position-grid strong,
.coverage-grid strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.position-grid span,
.coverage-grid span {
  display: block;
  color: var(--text-mute);
  font-size: 13px;
  line-height: 1.45;
}

/* left-labelled rows used for "the three stages / the forced chain" */
.lesson-flow {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.lesson-flow div {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elev);
  padding: 12px 14px;
}

.lesson-flow strong {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.lesson-flow span {
  color: var(--text-mute);
  font-size: 14px;
}

.trade-table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14px;
  table-layout: auto;
}

.trade-table th,
.trade-table td {
  border: 1px solid var(--border);
  padding: 9px 11px;
  text-align: left;
  vertical-align: top;
}

.trade-table th {
  background: var(--bg-elev);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
}

/* a shape/label column pair (tensor shapes ↔ notes), used by several widgets */
.shape-cols {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 18px;
  margin-top: 12px;
  align-items: start;
}
.shape-cols .lab {
  font-size: 12px;
  color: var(--text-mute);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.shape-cols pre { margin: 0; }

/* failure-modes / checklist two-up */
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}
.lesson-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elev);
  padding: 14px;
}
.lesson-card h3 { margin-top: 0; }
.lesson-card ul { margin: 0; padding-left: 18px; }
.lesson-card li { margin: 8px 0; font-size: 14px; }

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

@media (max-width: 820px) {
  .position-grid,
  .coverage-grid { grid-template-columns: 1fr; }
  .lesson-flow div { grid-template-columns: 1fr; }
  .shape-cols { grid-template-columns: 1fr; }
  .lesson-grid { grid-template-columns: 1fr; }
}