/* ── How LLMs Learn — lab styles ───────────────────────────── */

.llm-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 0 64px;
}
.llm-section { padding: 56px 56px 48px; }
.llm-hero    { padding: 100px 56px 48px; }

.llm-title {
  margin: 12px 0 18px;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.01em;
}
.llm-kicker {
  font-family: "Newsreader", serif;
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 18px 0 22px;
  max-width: 70ch;
}
.llm-prose {
  font-family: "Newsreader", serif;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--ink);
  max-width: 72ch;
  margin: 8px 0 28px;
}

.llm-dateline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-dim);
  border: 1px solid var(--ink-dim);
  margin: 22px 0 12px;
}
.llm-dateline > div {
  background: var(--paper);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.llm-dateline .label {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.llm-dateline .value {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
  color: var(--ink);
}

/* ── Charts ─────────────────────────────────────────────────── */
.llm-chart-wrap { margin: 18px 0 22px; }
.llm-chart-title {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 10px;
}
.llm-chart-wrap svg {
  width: 100%;
  height: auto;
  display: block;
  background: var(--paper);
  border: 1px solid var(--ink-dim);
}

/* ── Plain-language readout ────────────────────────────────── */
.llm-readout {
  max-width: 760px;
  padding: 18px 22px;
  border-left: 2px solid var(--accent);
  background: var(--paper-2);
  margin: 18px 0 22px;
}
.llm-readout-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.llm-readout p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}
.llm-readout strong { color: var(--ink); font-weight: 500; }
.llm-readout em     { color: var(--ink); font-style: italic; }

/* ── Equation block ─────────────────────────────────────────── */
.llm-eq-wrap {
  border: 1px solid var(--ink-dim);
  background: var(--paper-2);
  padding: 22px 28px;
  margin: 18px 0;
}
.llm-eq-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 12px;
}
.llm-eq {
  font-family: "Newsreader", serif;
  font-size: 22px;
  line-height: 1.7;
  color: var(--ink);
  font-style: italic;
}
.llm-eq .llm-fn { font-style: normal; color: var(--accent); }
.llm-eq-legend {
  font-size: 11px;
  color: var(--ink-soft);
  margin-top: 12px;
  letter-spacing: 0.04em;
}

/* ── Training-stack grid ────────────────────────────────────── */
.llm-stack-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-dim);
  border: 1px solid var(--ink-dim);
}
.llm-stack-tile {
  background: var(--paper);
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.llm-stack-bar {
  height: 6px;
  background: var(--paper-2);
  position: relative;
  margin: 4px 0 6px;
}
.llm-stack-bar-fill {
  height: 100%;
  background: var(--accent);
  opacity: 0.85;
}
.llm-stack-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.llm-stack-name {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 13px;
  color: var(--ink);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.llm-stack-share {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11.5px;
  color: var(--accent);
}
.llm-stack-row {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10.5px;
  color: var(--ink-soft);
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 10px;
  margin-top: 2px;
}
.llm-stack-row .key {
  color: var(--ink-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 9px;
}
.llm-stack-tile .narrative {
  font-family: "Newsreader", serif;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin-top: 8px;
}

/* ── Tokenization examples ─────────────────────────────────── */
.llm-tokens {
  border: 1px solid var(--ink-dim);
  background: var(--paper);
  padding: 18px 22px;
  margin: 14px 0 18px;
  display: grid;
  gap: 14px;
}
.llm-token-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  border-top: 1px dashed var(--ink-dim);
  padding-top: 12px;
}
.llm-token-row:first-child { border-top: 0; padding-top: 0; }
.llm-token-row .src {
  font-family: "Newsreader", serif;
  font-size: 16px;
  font-style: italic;
  color: var(--ink);
  grid-column: 1 / -1;
  margin-bottom: 4px;
}
.llm-token-side {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.llm-token-side .head {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.llm-token-pieces {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.llm-token-piece {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
  padding: 3px 8px;
  background: var(--paper-2);
  border: 1px solid var(--ink-dim);
  color: var(--ink);
  white-space: pre;
}
.llm-token-piece .id {
  display: block;
  font-size: 8.5px;
  color: var(--ink-dim);
  margin-top: 2px;
  letter-spacing: 0.06em;
}

/* ── Architecture history strip ────────────────────────────── */
.llm-history {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-dim);
  border: 1px solid var(--ink-dim);
  margin-top: 14px;
}
.llm-history-cell {
  background: var(--paper);
  padding: 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.llm-history-year {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.10em;
}
.llm-history-label {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
  color: var(--ink);
}
.llm-history-meta {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 9.5px;
  color: var(--ink-soft);
}

/* ── Phenomena grid (training dynamics) ────────────────────── */
.llm-phenomena {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-dim);
  border: 1px solid var(--ink-dim);
  margin-top: 14px;
}
.llm-phen-tile {
  background: var(--paper);
  padding: 18px 22px;
}
.llm-phen-tile h4 {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 8px;
}
.llm-phen-tile .summary {
  font-family: "Newsreader", serif;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink);
}
.llm-phen-tile .evidence {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10px;
  line-height: 1.55;
  color: var(--ink-dim);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* ── Alignment table ───────────────────────────────────────── */
.llm-alignment {
  background: var(--paper);
  border: 1px solid var(--ink-dim);
}
.llm-align-row {
  display: grid;
  grid-template-columns: 180px 80px 1fr 1.4fr 1fr;
  gap: 1px;
  background: var(--ink-dim);
}
.llm-align-row > div {
  background: var(--paper);
  padding: 10px 12px;
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10.5px;
  line-height: 1.5;
}
.llm-align-row.head > div {
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  background: var(--paper-2);
}
.llm-align-row .name { color: var(--ink); font-weight: 500; }
.llm-align-row .year { color: var(--accent); }
.llm-align-row .citation { color: var(--ink-soft); font-size: 9.5px; }

/* ── Coda grid ──────────────────────────────────────────────── */
.llm-coda-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--ink-dim);
  border: 1px solid var(--ink-dim);
}
.llm-coda-tile {
  background: var(--paper);
  padding: 22px 26px;
  border-left: 2px solid var(--accent);
}
.llm-coda-tile h4 {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}
.llm-coda-tile p {
  font-family: "Newsreader", serif;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink);
  margin: 0 0 12px;
}
.llm-coda-tile ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--ink-soft);
}
.llm-coda-tile li { padding: 3px 0; }

/* ── Receipts ───────────────────────────────────────────────── */
.llm-receipts {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-dim);
  border: 1px solid var(--ink-dim);
}
.llm-receipt {
  background: var(--paper);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.llm-receipt-label {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.llm-receipt-value {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 19px;
  font-weight: 500;
  color: var(--ink);
}
.llm-receipt-sub {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--ink-soft);
}

/* ── Methodology ────────────────────────────────────────────── */
.llm-method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 36px;
  margin-top: 14px;
}
.llm-method-grid .method-head,
.llm-method-head {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 8px;
}
.llm-method-grid p {
  font-family: "Newsreader", serif;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.llm-readinglist { margin-top: 22px; }
.llm-readinglist ul { list-style: none; margin: 0; padding: 0; }
.llm-readinglist li { font-size: 11px; margin-bottom: 4px; }
.llm-readinglist a {
  border-bottom: 1px solid var(--ink-dim);
  color: var(--ink-soft);
}
.llm-readinglist a:hover { color: var(--accent); border-color: var(--accent); }

.llm-caveats {
  margin-top: 28px;
  border-top: 1px solid var(--ink-dim);
  padding-top: 22px;
}
.llm-caveat-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.llm-caveats ul {
  margin: 0;
  padding-left: 22px;
  list-style: square;
}
.llm-caveats li {
  font-family: "Newsreader", serif;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .llm-section { padding: 48px 36px; }
  .llm-hero    { padding: 88px 36px 40px; }
  .llm-receipts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .llm-history  { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .llm-stack-grid, .llm-phenomena, .llm-coda-grid { grid-template-columns: 1fr; }
  .llm-align-row { grid-template-columns: 130px 60px 1fr 1.4fr 1fr; font-size: 9.5px; }
}
@media (max-width: 720px) {
  .llm-section { padding: 36px 20px; }
  .llm-hero    { padding: 72px 20px 32px; }
  .llm-dateline { grid-template-columns: 1fr 1fr; }
  .llm-method-grid { grid-template-columns: 1fr; }
  .llm-receipts { grid-template-columns: 1fr 1fr; }
  .llm-history  { grid-template-columns: 1fr 1fr; }
  .llm-token-row { grid-template-columns: 1fr; }
  .llm-align-row { grid-template-columns: 1fr; }
  .llm-align-row.head { display: none; }
}