/* Scene 12 — "The loss that knows about every pixel."
   Layout:
     hero
     top row: input | ground truth | prediction (3 panels at 256px each)
     middle row: heatmap (left) | inspector (right)
     aggregate scalar loss bar
     synthetic-softmax footnote
     caption + controls */

.s12-root .s12-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.s12-hero h1 { font-size: 28px; }
.s12-hero .lede em { font-style: italic; color: var(--ink); }

.s12-mini-host { align-self: flex-start; }

/* ---------------------------------------------------------------------------
   Top row: input · ground truth · prediction
   --------------------------------------------------------------------------- */

.s12-toprow {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
}
.s12-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.s12-panel-label {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s12-panel-host {
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--card-bg);
}
.s12-panel-host canvas { display: block; image-rendering: pixelated; }

/* The prediction panel becomes click-able from step 1+ */
.s12-toprow .s12-panel:nth-child(3) .s12-panel-host { cursor: crosshair; }

/* ---------------------------------------------------------------------------
   Middle row: heatmap | inspector
   --------------------------------------------------------------------------- */

.s12-midrow {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(280px, 1.1fr);
  gap: 18px;
  margin-top: 6px;
}

/* Heatmap card */
.s12-heat {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.s12-heat-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}
.s12-heat-title {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s12-heat-note {
  font-size: 10.5px;
  color: var(--ink-secondary);
  font-style: italic;
}
.s12-heat-wrap {
  position: relative;
  align-self: center;
}
.s12-heat-host {
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--bg);
  cursor: crosshair;
}
.s12-heat-host canvas { display: block; image-rendering: pixelated; }
.s12-heat-hint {
  font-size: 10.5px;
  color: var(--ink-secondary);
  font-style: italic;
  text-align: center;
}

.s12-reticle {
  position: absolute;
  border: 2px solid var(--cnn-accent);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  box-sizing: border-box;
}

/* Inspector card */
.s12-inspector {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: 0.55;
  transition: opacity 220ms ease-out;
}
.s12-midrow.s12-step-1 .s12-inspector { opacity: 1; }

.s12-ins-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.s12-ins-title {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s12-ins-coords {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11.5px;
  color: var(--ink);
}

.s12-barwrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.s12-barrow {
  display: grid;
  grid-template-columns: 14px 64px 1fr 48px 18px;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}
.s12-bar-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: currentColor;
  border: 1px solid color-mix(in srgb, currentColor 80%, transparent);
}
.s12-bar-name {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.s12-bartrack {
  position: relative;
  height: 14px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}
.s12-barfill {
  position: absolute;
  inset: 0 auto 0 0;
  background: currentColor;
  transition: width 180ms ease-out;
}
.s12-barlabel {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  text-align: right;
}
.s12-onehot {
  width: 14px;
  height: 14px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--bg);
  position: relative;
}
.s12-onehot.on {
  background: var(--cnn-pos);
  border-color: var(--cnn-pos);
}
.s12-onehot.on::after {
  content: "✓";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 10px;
  line-height: 1;
}

/* Highlight rows: predicted + ground truth */
.s12-barrow.s12-pred .s12-bar-name { font-weight: 700; }
.s12-barrow.s12-gt .s12-onehot { box-shadow: 0 0 0 2px var(--cnn-accent); }

.s12-formula {
  border-top: 1px dashed var(--rule);
  padding-top: 8px;
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
}
.s12-formula-host .katex,
.s12-formula-ce .katex { color: var(--ink); }
.s12-formula-ce { color: var(--cnn-pos); font-size: 0.95em; }

/* ---------------------------------------------------------------------------
   Aggregate scalar loss
   --------------------------------------------------------------------------- */

.s12-aggregate {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.s12-agg-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.s12-agg-title {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s12-agg-value {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
  color: var(--cnn-pos);
  transition: opacity 180ms ease-out;
}
.s12-agg-formula { text-align: center; }
.s12-agg-formula .katex { color: var(--ink); }

/* ---------------------------------------------------------------------------
   Footnote (synthetic-softmax disclosure)
   --------------------------------------------------------------------------- */

.s12-footnote {
  text-align: left;
  font-style: italic;
  font-size: 11.5px;
  color: var(--ink-secondary);
}
.s12-footnote em { color: var(--ink); font-style: italic; }

.s12-caption {
  margin: 4px 4px 0;
  text-align: center;
  font-size: 14.5px;
}

/* ---------------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .s12-toprow { grid-template-columns: 1fr; }
  .s12-midrow { grid-template-columns: 1fr; }
}