/* =========================================================================
   Karpathy "Build it from scratch" section
   A notebook / REPL transcript styling with Jupyter-cell vibe.
   Scoped entirely to .karpathy-section to not bleed into the rest of the page.
   ========================================================================= */

.karpathy-section {
  --kp-bg: #fbfaf7;
  --kp-cell-bg: #ffffff;
  --kp-cell-border: #e3e0d6;
  --kp-prompt: #999;
  --kp-prompt-active: #ff6b35;
  --kp-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --kp-ink: #1a1a1a;
  --kp-ink-soft: #555;
  --kp-out-bg: #0e1116;
  --kp-out-fg: #d7e3d4;
  --kp-out-dim: #7e9078;
  --kp-out-accent: #8be08b;
  --kp-out-warn: #e8b86a;
  --kp-out-bad: #e77a6a;
}

/* Section frame: subtle dot-grid bg, distinct from page */
.karpathy-section .anatomy-inner,
.karpathy-section-inner {
  max-width: var(--wide-max, 1080px);
  margin: 0 auto;
  padding: 32px 24px 40px;
  background:
    radial-gradient(circle at 1px 1px, rgba(0,0,0,0.05) 1px, transparent 0) 0 0 / 22px 22px,
    var(--kp-bg);
  border: 1px solid var(--kp-cell-border);
  border-radius: 10px;
}

.karpathy-section .kp-eyebrow {
  font-family: var(--ui-font);
  font-size: 11px;
  font-weight: 700;
  color: var(--kp-prompt-active);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}

.karpathy-section .kp-title {
  font-family: var(--ui-font);
  font-weight: 700;
  font-size: 32px;
  letter-spacing: -0.01em;
  margin: 0 0 8px 0;
  color: var(--kp-ink);
  font-variant: small-caps;
  letter-spacing: 0.04em;
}

.karpathy-section .kp-lede {
  max-width: 720px;
  margin: 0 auto 28px auto;
  color: var(--kp-ink-soft);
  font-family: var(--body-font);
  font-size: 17px;
  line-height: 1.6;
  text-align: left;
}

.karpathy-section .kp-lede code {
  font-family: var(--kp-mono);
  font-size: 0.86em;
  background: #efece4;
  padding: 1px 5px;
  border-radius: 3px;
}

/* === Notebook cell ====================================================== */
.karpathy-section .kp-cell {
  background: var(--kp-cell-bg);
  border: 1px solid var(--kp-cell-border);
  border-radius: 6px;
  margin: 28px 0;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02);
}

.karpathy-section .kp-cell-head {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 14px 20px 4px;
}

.karpathy-section .kp-cell-num {
  font-family: var(--kp-mono);
  font-size: 13px;
  color: var(--kp-prompt-active);
  font-weight: 600;
  white-space: nowrap;
  min-width: 34px;
}

.karpathy-section .kp-cell-title {
  font-family: var(--ui-font);
  font-size: 18px;
  font-weight: 700;
  color: var(--kp-ink);
  margin: 0;
}

.karpathy-section .kp-cell-body {
  padding: 0 20px 16px 20px;
}

.karpathy-section .kp-prose {
  font-family: var(--body-font);
  color: var(--kp-ink);
  font-size: 15.5px;
  line-height: 1.55;
  margin: 6px 0 14px 0;
}

.karpathy-section .kp-prose em {
  color: var(--kp-prompt-active);
  font-style: normal;
  font-family: var(--kp-mono);
  font-size: 0.9em;
  background: #fef2ec;
  padding: 0 4px;
  border-radius: 3px;
}

/* === Code block (Jupyter In[]: style) =================================== */
.karpathy-section .kp-codeblock {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 8px;
  align-items: stretch;
  margin: 10px 0 12px 0;
  border: 1px solid var(--kp-cell-border);
  border-radius: 4px;
  overflow: hidden;
  background: #f7f5ef;
}

.karpathy-section .kp-prompt {
  background: #efece4;
  color: var(--kp-prompt-active);
  font-family: var(--kp-mono);
  font-size: 12px;
  padding: 12px 8px;
  text-align: right;
  border-right: 1px solid var(--kp-cell-border);
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.karpathy-section pre.kp-code {
  margin: 0;
  padding: 12px 16px;
  font-family: var(--kp-mono) !important;
  font-size: 13px;
  line-height: 1.55;
  background: transparent !important;
  color: var(--kp-ink);
  overflow-x: auto;
  white-space: pre;
  tab-size: 4;
}

.karpathy-section pre.kp-code code {
  font-family: var(--kp-mono) !important;
  font-size: 13px;
  background: transparent !important;
  padding: 0 !important;
  border-radius: 0 !important;
}

/* Tone down prism-ish coloring to match the muted palette */
.karpathy-section .token.comment,
.karpathy-section .token.prolog,
.karpathy-section .token.doctype,
.karpathy-section .token.cdata { color: #999; font-style: italic; }
.karpathy-section .token.keyword,
.karpathy-section .token.builtin { color: #2c5aa0; font-weight: 600; }
.karpathy-section .token.string,
.karpathy-section .token.char,
.karpathy-section .token.attr-value { color: #2a9d4a; }
.karpathy-section .token.number,
.karpathy-section .token.boolean { color: #ff6b35; }
.karpathy-section .token.function { color: #6c5ce7; font-weight: 600; }
.karpathy-section .token.operator,
.karpathy-section .token.punctuation { color: #555; }
.karpathy-section .token.class-name,
.karpathy-section .token.tag { color: #c0392b; font-weight: 600; }
.karpathy-section .token.decorator { color: #d3406e; }

/* === Run row ============================================================ */
.karpathy-section .kp-runrow {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin: 10px 0 0;
}

.karpathy-section .kp-run,
.karpathy-section .kp-reset {
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  padding: 7px 14px;
  border: 1px solid var(--kp-ink);
  background: var(--kp-ink);
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.12s;
}

.karpathy-section .kp-run:hover { background: var(--kp-prompt-active); border-color: var(--kp-prompt-active); }

.karpathy-section .kp-reset {
  background: transparent;
  color: var(--kp-ink-soft);
  border-color: var(--kp-cell-border);
}

.karpathy-section .kp-reset:hover { color: var(--kp-ink); border-color: var(--kp-ink); }

.karpathy-section .kp-runnote {
  font-family: var(--ui-font);
  font-size: 11px;
  color: var(--kp-ink-soft);
  letter-spacing: 0.02em;
}

/* === Output panel (CRT style) =========================================== */
.karpathy-section .kp-output {
  display: none;
  margin-top: 14px;
  border: 1px solid var(--kp-cell-border);
  border-radius: 4px;
  overflow: hidden;
}

.karpathy-section .kp-output.is-open { display: block; }

.karpathy-section .kp-out-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 0;
  background: var(--kp-out-bg);
}

@media (max-width: 720px) {
  .karpathy-section .kp-out-grid {
    grid-template-columns: 1fr;
  }
}

.karpathy-section .kp-out-prompt {
  padding: 8px 14px;
  background: #0a0c10;
  color: var(--kp-out-accent);
  font-family: var(--kp-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  border-bottom: 1px solid #1a1f28;
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.karpathy-section .kp-out-prompt .kp-tag {
  color: var(--kp-out-warn);
}

.karpathy-section pre.kp-console {
  margin: 0;
  padding: 14px 16px;
  font-family: var(--kp-mono);
  font-size: 12px;
  line-height: 1.55;
  color: var(--kp-out-fg);
  background: var(--kp-out-bg);
  max-height: 260px;
  overflow-y: auto;
  white-space: pre;
  min-height: 220px;
  border-right: 1px solid #1a1f28;
}

.karpathy-section pre.kp-console .kp-l {
  color: var(--kp-out-dim);
}

.karpathy-section pre.kp-console .kp-num {
  color: var(--kp-out-accent);
}

.karpathy-section pre.kp-console .kp-warn {
  color: var(--kp-out-warn);
}

.karpathy-section pre.kp-console .kp-bad {
  color: var(--kp-out-bad);
}

.karpathy-section pre.kp-console .kp-good {
  color: var(--kp-out-accent);
  font-weight: 600;
}

/* Right column: scatter + diagnostic dial */
.karpathy-section .kp-viz {
  padding: 12px;
  background: #0e1116;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 220px;
}

.karpathy-section .kp-viz-title {
  font-family: var(--kp-mono);
  font-size: 10px;
  color: var(--kp-out-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.karpathy-section .kp-scatter {
  width: 100%;
  background: #06080b;
  border: 1px solid #1a1f28;
  border-radius: 3px;
  aspect-ratio: 1 / 1;
  max-height: 220px;
}

.karpathy-section .kp-rank-row {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.karpathy-section .kp-rank-block {
  flex: 1 1 auto;
  min-width: 0;
}

.karpathy-section .kp-rank-label {
  font-family: var(--kp-mono);
  font-size: 10px;
  color: var(--kp-out-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
}

.karpathy-section .kp-rank-val {
  font-family: var(--kp-mono);
  font-size: 17px;
  color: var(--kp-out-accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.karpathy-section .kp-rank-val .kp-max {
  color: var(--kp-out-dim);
  font-size: 12px;
  font-weight: 400;
  margin-left: 3px;
}

.karpathy-section .kp-rank-bar {
  width: 100%;
  height: 4px;
  background: #1a1f28;
  border-radius: 2px;
  overflow: hidden;
}

.karpathy-section .kp-rank-bar-fill {
  height: 100%;
  background: var(--kp-out-accent);
  width: 0;
  transition: width 0.18s ease-out;
}

.karpathy-section .kp-rank-bar-fill.is-bad {
  background: var(--kp-out-bad);
}

/* === Takeaway ============================================================ */
.karpathy-section .kp-takeaway {
  display: none;
  margin: 14px 0 0;
  padding: 10px 14px;
  background: #fff7ee;
  border-left: 3px solid var(--kp-prompt-active);
  color: var(--kp-ink);
  font-family: var(--ui-font);
  font-size: 14px;
  font-weight: 500;
}

.karpathy-section .kp-takeaway.is-open { display: block; }

.karpathy-section .kp-takeaway b {
  color: var(--kp-prompt-active);
}

/* === Attempt 3: static animation ======================================== */
.karpathy-section .kp-static-viz {
  margin-top: 14px;
  border: 1px solid var(--kp-cell-border);
  border-radius: 4px;
  background: #fafaf6;
  padding: 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

@media (max-width: 720px) {
  .karpathy-section .kp-static-viz { grid-template-columns: 1fr; }
}

.karpathy-section .kp-mnist-stage {
  background: #fff;
  border: 1px solid var(--kp-cell-border);
  border-radius: 4px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

.karpathy-section .kp-mnist-stage svg { width: 100%; max-width: 260px; height: auto; }

.karpathy-section .kp-static-meta {
  font-family: var(--kp-mono);
  font-size: 12px;
  color: var(--kp-ink-soft);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}

.karpathy-section .kp-static-meta .kp-static-headline {
  font-family: var(--ui-font);
  font-size: 22px;
  font-weight: 700;
  color: var(--kp-prompt-active);
  margin-bottom: 2px;
}

.karpathy-section .kp-static-meta .kp-static-sub {
  font-family: var(--ui-font);
  font-size: 13px;
  color: var(--kp-ink-soft);
  margin-bottom: 12px;
}

.karpathy-section .kp-static-meta code {
  font-family: var(--kp-mono);
  background: #efece4;
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 11px;
}

.karpathy-section .kp-static-link {
  font-family: var(--ui-font);
  font-size: 11px;
  color: var(--secondary, #2c5aa0);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  text-decoration: none;
  margin-top: 6px;
}

/* Attempt 4: histogram inline */
.karpathy-section .kp-hist {
  width: 100%;
  background: #06080b;
  border: 1px solid #1a1f28;
  border-radius: 3px;
  margin-top: 6px;
  display: block;
}

/* === Recap row ========================================================== */
.karpathy-section .kp-recap {
  margin-top: 36px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--kp-cell-border);
  border-radius: 6px;
}

.karpathy-section .kp-recap h3 {
  font-family: var(--ui-font);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--kp-ink-soft);
  margin: 0 0 10px 0;
  font-weight: 700;
}

.karpathy-section .kp-recap-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--ui-font);
  font-size: 13.5px;
}

.karpathy-section .kp-recap-table th,
.karpathy-section .kp-recap-table td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--kp-cell-border);
}

.karpathy-section .kp-recap-table th {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--kp-ink-soft);
  font-weight: 700;
}

.karpathy-section .kp-recap-table tr:last-child td { border-bottom: none; }

.karpathy-section .kp-recap-table code {
  font-family: var(--kp-mono);
  font-size: 11.5px;
  background: #f5f3ed;
  padding: 1px 5px;
  border-radius: 3px;
}

.karpathy-section .kp-recap-table .kp-good { color: var(--good, #2a9d4a); font-weight: 600; }
.karpathy-section .kp-recap-table .kp-bad { color: var(--bad, #c0392b); font-weight: 600; }

/* Mobile tweaks */
@media (max-width: 540px) {
  .karpathy-section .anatomy-inner,
  .karpathy-section-inner { padding: 22px 14px 28px; }
  .karpathy-section .kp-cell-head { padding: 12px 14px 4px; flex-wrap: wrap; }
  .karpathy-section .kp-cell-body { padding: 0 14px 14px 14px; }
  .karpathy-section .kp-codeblock { grid-template-columns: 44px 1fr; }
  .karpathy-section .kp-prompt { padding: 10px 4px; font-size: 11px; }
  .karpathy-section pre.kp-code { padding: 10px 12px; font-size: 12px; }
  .karpathy-section pre.kp-console { font-size: 11px; padding: 10px 12px; }
  .karpathy-section .kp-title { font-size: 24px; }
}