/* ============================================================
   Tamerix -- Issue 02: Fine-tuning
   Page-specific styles for issues/finetuning/index.html.

   Loaded after assets/core.css. This file owns:
     - prose marks (why-card, math-card, takeaway, callout, note)
     - math viz primitives (token-pill, num-grid, heatmap, bars,
       iter-card, architecture diagram)
     - live-viz panels: code-block, slider-row, linechart, lora-grids,
       mini-heatmap, bucket-line (NF4), memory-bars, dpo-bars,
       decision-step / decision-leaf, method-matrix.

   New issue authors: copy this file as a template; trim what you
   don't need.
   ============================================================ */

/* ============================================================
   Prose marks (the editorial primitives)
   ============================================================ */

.why-card {
  background: var(--surface);
  border-left: 2px solid var(--accent);
  padding: 16px 20px;
  margin: 18px 0 22px;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.why-card p { margin: 0 0 8px; }
.why-card p:last-child { margin: 0; }
.why-card strong { color: var(--accent); }

.math-card {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  padding: 18px 22px;
  margin: 18px 0;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
}
.math-card .formula {
  text-align: center;
  margin: 6px 0;
  font-size: 16px;
  color: var(--ink);
}
.math-card .legend {
  font-family: var(--font-ui);
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 12px;
  border-top: 1px solid var(--hairline-cool);
  padding-top: 10px;
  line-height: 1.55;
}
.math-card .legend .sym {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 600;
}

.takeaway {
  font-style: italic;
  color: var(--accent);
  margin: 24px 0 0;
  padding: 10px 14px;
  border-left: 2px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.takeaway::before { content: "\2192  "; font-weight: 700; }

.callout {
  border: 1px dashed var(--accent);
  background: var(--surface);
  padding: 14px 18px;
  margin: 18px 0;
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.55;
}
.callout strong { color: var(--accent); }
.callout ul { margin: 6px 0; padding-left: 22px; }
.callout li { margin: 4px 0; }

.note {
  background: var(--accent-soft);
  border-left: 2px solid var(--accent);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14.5px;
}

.reading-hint {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  margin: 6px 0 10px;
}

.numbers-area { margin: 14px 0; overflow-x: auto; }

.walk {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-top: 10px;
  line-height: 1.7;
  color: var(--ink);
  overflow-x: auto;
}
.walk em { color: var(--muted); }

.grid-label {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--muted);
  margin: 12px 0 4px;
  font-weight: 600;
}

/* ============================================================
   Form chrome (used by slider panels)
   ============================================================ */

input[type=text] {
  flex: 1;
  min-width: 280px;
  padding: 10px 14px;
  font-family: inherit;
  font-size: 16px;
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
}
input[type=text]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  padding: 10px 18px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  letter-spacing: 0.02em;
}
button:hover { filter: brightness(0.92); }
button:focus { outline: 2px solid var(--ink); outline-offset: 2px; }

/* ============================================================
   Math viz primitives (shared shape with Issue 01)
   ============================================================ */

.token-strip { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.token-pill {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius-lg);
  padding: 6px 12px;
  font-family: var(--font-ui);
  min-width: 56px;
}
.token-pill .glyph { font-weight: 600; font-size: 15px; color: var(--ink); }
.token-pill .id    { font-family: var(--font-mono); font-size: 11px; color: var(--muted); margin-top: 3px; }
.token-pill.special .glyph { color: var(--accent); font-style: italic; font-size: 13px; }

.num-grid {
  font-family: var(--font-mono);
  font-size: 12px;
  border-collapse: collapse;
  margin: 8px 0;
}
.num-grid th,
.num-grid td {
  padding: 4px 7px;
  text-align: right;
  border: 1px solid var(--hairline-cool);
  font-variant-numeric: tabular-nums;
}
.num-grid th {
  background: var(--surface);
  font-weight: 600;
  color: var(--muted);
  font-size: 11px;
}
.num-grid td.row-label,
.num-grid th.row-label {
  text-align: left;
  background: var(--surface);
  color: var(--accent);
  font-weight: 600;
}

.heatmap-wrap { display: inline-block; max-width: 100%; }
.heatmap {
  display: inline-grid;
  gap: 1px;
  background: var(--hairline-cool);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  overflow: hidden;
}
.heatmap .cell {
  background: var(--surface);
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-align: center;
  min-width: 48px;
  min-height: 28px;
  cursor: help;
  font-variant-numeric: tabular-nums;
}
.heatmap .header,
.heatmap .corner,
.heatmap .row-label {
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
}
.heatmap .row-label { color: var(--accent); text-align: right; padding-right: 10px; }
.heatmap .header { font-size: 10.5px; }

.bars {
  margin: 12px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  max-width: 720px;
}
.bar-row {
  display: grid;
  grid-template-columns: 90px 1fr 80px;
  align-items: center;
  gap: 8px;
  padding: 2px 0;
}
.bar-label {
  text-align: right;
  color: var(--muted);
  font-size: 12px;
}
.bar-track {
  height: 16px;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.bar-fill { height: 100%; background: var(--ink); border-radius: 0; }
.bar-row.picked .bar-fill { background: var(--accent); }
.bar-row.picked .bar-label,
.bar-row.picked .bar-value {
  color: var(--accent);
  font-weight: 700;
}
.bar-value {
  font-size: 12px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.iter-card {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 12px 0;
}
.iter-card .iter-head {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}
.iter-card .iter-pick {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.iter-card .iter-context {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  margin: 4px 0 8px;
}
.iter-card .iter-prob {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.architecture-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin: 24px 0;
  font-family: var(--font-ui);
  font-size: 13px;
}
.archblock {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  padding: 8px 16px;
  min-width: 220px;
  text-align: center;
  color: var(--ink);
}
.archblock.attn {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}
.archblock.ffn {
  border-color: var(--ink);
  background: var(--surface);
  color: var(--ink);
}
.archarrow { font-size: 16px; color: var(--muted); }

/* ============================================================
   Live-viz components (Issue 02-specific)
   ============================================================ */

pre.code-block {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 14px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre;
  tab-size: 4;
}
pre.code-block code { font-family: inherit; background: none; padding: 0; }

.panel {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 14px 0;
}
.panel .panel-head {
  font-family: var(--font-ui);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.slider-row {
  display: grid;
  grid-template-columns: 130px 1fr 60px;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  font-family: var(--font-ui);
  font-size: 13px;
}
.slider-row .name { color: var(--muted); text-align: right; }
.slider-row input[type=range] { width: 100%; accent-color: var(--accent); }
.slider-row .val {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-weight: 600;
  text-align: right;
}

.run-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 12px 0;
  flex-wrap: wrap;
  font-family: var(--font-ui);
  font-size: 12.5px;
  color: var(--muted);
}

/* line chart (loss curves) */
.linechart {
  width: 100%;
  height: 240px;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  display: block;
}
.linechart .grid-line { stroke: var(--hairline-cool); stroke-width: 1; }
.linechart .axis-label { font-family: var(--font-ui); font-size: 11px; fill: var(--muted); }
.linechart .axis-num   { font-family: var(--font-mono); font-size: 10px; fill: var(--muted); }
.linechart .data-line  { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; }
.linechart .data-line.alt { stroke: var(--cool, #1e3a8a); stroke-dasharray: 4 4; }
.linechart .data-dot   { fill: var(--accent); }
.linechart .legend-text { font-family: var(--font-ui); font-size: 11px; fill: var(--ink); }
.linechart .legend-swatch { stroke-width: 2; }

/* LoRA decomposition heatmaps (W_0, B, A, BA, W') */
.lora-grids {
  display: grid;
  grid-template-columns: auto auto auto auto auto auto auto;
  gap: 10px 14px;
  align-items: center;
  margin: 12px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 11px;
}
.lora-grid-cap {
  font-family: var(--font-ui);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 4px;
  text-align: center;
  font-weight: 600;
}
.lora-cell { display: flex; flex-direction: column; align-items: center; }
.lora-op {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--muted);
}
.mini-heatmap {
  display: inline-grid;
  gap: 1px;
  background: var(--hairline-cool);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
}
.mini-heatmap .mhm-cell {
  background: var(--surface);
  width: 14px;
  height: 14px;
}

/* NF4 quantization bucket number-line */
.bucket-line {
  position: relative;
  height: 90px;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  margin: 12px 0;
  padding: 0 8px;
}
.bucket-line .axis {
  position: absolute;
  left: 8px;
  right: 8px;
  top: 50%;
  height: 1px;
  background: var(--muted);
}
.bucket-line .tick {
  position: absolute;
  top: 50%;
  width: 2px;
  height: 14px;
  background: var(--accent);
  transform: translate(-50%, -50%);
}
.bucket-line .tick-label {
  position: absolute;
  top: calc(50% + 12px);
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted);
  transform: translateX(-50%);
  white-space: nowrap;
}
.bucket-line .sample {
  position: absolute;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
  transform: translateX(-50%);
  cursor: help;
}
.bucket-line .arrow {
  position: absolute;
  top: 18px;
  width: 1px;
  background: var(--muted);
  transform: translateX(-50%);
  opacity: 0.5;
}

/* memory comparison bar chart (FP32, FP16, INT8, NF4) */
.memory-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 12px 0;
  font-family: var(--font-ui);
  font-size: 13px;
}
.memory-bars .mb-row {
  display: grid;
  grid-template-columns: 80px 1fr 110px;
  align-items: center;
  gap: 10px;
}
.memory-bars .mb-name { color: var(--muted); text-align: right; }
.memory-bars .mb-track {
  height: 22px;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.memory-bars .mb-fill { height: 100%; background: var(--accent); border-radius: 0; }
.memory-bars .mb-row.qlora .mb-fill { background: var(--accent); }
.memory-bars .mb-row.full  .mb-fill { background: var(--ink); }
.memory-bars .mb-val {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

/* DPO log-prob comparison panel */
.dpo-bars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 12px 0;
}
.dpo-bars .dpo-col {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  padding: 12px 14px;
  border-radius: var(--radius);
}
.dpo-bars .dpo-col .col-head {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 8px;
}
.dpo-bars .dpo-col .row {
  display: grid;
  grid-template-columns: 100px 1fr 60px;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-family: var(--font-mono);
  font-size: 12px;
}
.dpo-bars .dpo-col .row .name { color: var(--muted); text-align: right; }
.dpo-bars .dpo-col .row .track {
  height: 14px;
  background: var(--bg);
  border-radius: 2px;
  overflow: hidden;
}
.dpo-bars .dpo-col .row .fill { height: 100%; background: var(--ink); }
.dpo-bars .dpo-col .row.chosen .fill { background: var(--accent); }
.dpo-bars .dpo-col .row .val {
  font-family: var(--font-mono);
  font-size: 11px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.dpo-result {
  margin: 12px 0;
  padding: 14px 18px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-mono);
  font-size: 13px;
}
.dpo-result strong { color: var(--accent); }

/* decision tree (interactive flowchart) */
.decision-step {
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 12px 0;
}
.decision-step .question {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 500;
  margin: 0 0 14px;
  color: var(--ink);
  line-height: 1.4;
}
.decision-step .options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.decision-step .opt {
  background: var(--bg);
  border: 1px solid var(--hairline-cool);
  border-left: 3px solid var(--accent);
  padding: 10px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
  transition: background 100ms ease;
}
.decision-step .opt:hover { background: var(--accent-soft); }
.decision-step .opt:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.decision-step .breadcrumb {
  font-family: var(--font-ui);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 10px;
  font-weight: 600;
}
.decision-step .breadcrumb .step-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 10px;
  margin-right: 6px;
  text-transform: none;
  letter-spacing: 0;
  font-size: 12px;
}
.decision-leaf {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 18px 22px;
  margin: 12px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.decision-leaf h4 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
  color: var(--accent);
}
.decision-leaf p { margin: 0 0 8px; }
.decision-leaf .recipe {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--hairline-cool);
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-top: 10px;
  white-space: pre-wrap;
}
.decision-leaf .reset {
  margin-top: 12px;
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--muted);
  background: none;
  border: none;
  border-bottom: 1px solid var(--hairline-cool);
  cursor: pointer;
  padding: 0;
  font-weight: 500;
}
.decision-leaf .reset:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* method comparison matrix (table with color-coded cells) */
.method-matrix {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 13px;
  margin: 14px 0;
}
.method-matrix th, .method-matrix td {
  border: 1px solid var(--hairline-cool);
  padding: 8px 12px;
  text-align: center;
  vertical-align: middle;
}
.method-matrix thead th {
  background: var(--surface);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 600;
}
.method-matrix th.row-head, .method-matrix td.row-head {
  text-align: left;
  background: var(--surface);
  color: var(--accent);
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
  font-size: 13px;
}
.method-matrix .cell-good   { background: #f0f7e8; color: #2c5916; }
.method-matrix .cell-mid    { background: #faf6ec; color: #6b6258; }
.method-matrix .cell-low    { background: #fbe8de; color: #6b2912; }
.method-matrix .cell-na     { color: var(--muted); font-style: italic; }
.method-matrix code { font-family: var(--font-mono); font-size: 12px; }

/* ============================================================
   Issue-specific responsive
   ============================================================ */

@media (max-width: 1024px) {
  .heatmap .cell { min-width: 36px; padding: 4px; font-size: 10px; }
}

@media (max-width: 700px) {
  /* shared math viz primitives -- same shape as Issue 01 */
  .token-pill { min-width: 48px; padding: 5px 10px; }
  .token-pill .glyph { font-size: 14px; }
  .num-grid th, .num-grid td { padding: 3px 5px; font-size: 11px; }
  .heatmap .cell { min-width: 28px; min-height: 22px; padding: 2px 3px; font-size: 9px; }
  .bar-row { grid-template-columns: 70px 1fr 60px; gap: 6px; font-size: 12px; }
  .bar-label { font-size: 11px; }
  .iter-card { padding: 12px 14px; }
  .iter-card .iter-pick { font-size: 20px; }
  .archblock { min-width: 180px; padding: 6px 12px; font-size: 12px; }
  input[type=text] { font-size: 15px; padding: 8px 12px; min-width: 200px; }
  button { padding: 8px 14px; font-size: 13px; }
  .math-card { font-size: 13.5px; padding: 14px 16px; }
  .math-card .formula { font-size: 14px; }
  .why-card { padding: 14px 16px; }
  .callout, .note { padding: 12px 14px; font-size: 13.5px; }
  /* code blocks already overflow-x: auto; reduce font on mobile */
  pre.code-block { font-size: 12px; padding: 12px 14px; }
  /* live-viz panels */
  .panel { padding: 14px 16px; }
  .slider-row { grid-template-columns: 100px 1fr 50px; gap: 8px; font-size: 12px; }
  .linechart { height: 200px; }
  /* NF4 bucket line: smaller tick labels */
  .bucket-line { height: 80px; }
  .bucket-line .tick-label { font-size: 8px; }
  /* memory bars: tighter columns */
  .memory-bars .mb-row { grid-template-columns: 60px 1fr 90px; gap: 8px; font-size: 12px; }
  .memory-bars .mb-track { height: 18px; }
  /* DPO bars: collapse 2-col to single column */
  .dpo-bars { grid-template-columns: 1fr; gap: 12px; }
  .dpo-bars .dpo-col .row { grid-template-columns: 80px 1fr 50px; gap: 6px; font-size: 11px; }
  .dpo-result { padding: 12px 14px; font-size: 12px; }
  /* decision tree: tighter */
  .decision-step { padding: 14px 16px; }
  .decision-step .question { font-size: 17px; }
  .decision-step .opt { font-size: 13px; padding: 8px 12px; }
  .decision-leaf { padding: 14px 16px; }
  .decision-leaf h4 { font-size: 19px; }
  .decision-leaf .recipe { font-size: 12px; padding: 8px 12px; }
  /* method matrix: needs horizontal scroll on small screens; wrap parent */
  .method-matrix { font-size: 11px; }
  .method-matrix th, .method-matrix td { padding: 6px 8px; }
  /* lora-grids has overflow-x already; just shrink mini cells */
  .mini-heatmap .mhm-cell { width: 11px; height: 11px; }
}

@media (max-width: 480px) {
  .heatmap .cell { min-width: 24px; min-height: 20px; font-size: 8.5px; padding: 1px 2px; }
  .num-grid th, .num-grid td { padding: 2px 4px; font-size: 10px; }
  .bar-row { grid-template-columns: 60px 1fr 50px; }
  .archblock { min-width: 100%; }
  pre.code-block { font-size: 11px; }
  .slider-row { grid-template-columns: 80px 1fr 44px; font-size: 11px; }
  .linechart { height: 180px; }
  .memory-bars .mb-row { grid-template-columns: 50px 1fr 75px; font-size: 11px; }
  .dpo-bars .dpo-col .row { grid-template-columns: 70px 1fr 44px; font-size: 10.5px; }
  .method-matrix { font-size: 10.5px; }
  .method-matrix th, .method-matrix td { padding: 5px 6px; }
  /* wrap method-matrix in a scroll container by making the table itself scrollable */
  .method-matrix { display: block; overflow-x: auto; white-space: nowrap; }
  .method-matrix tbody, .method-matrix thead { display: table; width: 100%; }
}