/* Scene 2 — "The dot product as a match score."
   Top: KaTeX formula. Middle: patch × filter = product. Bottom: input
   thumbnail + response heatmap + match-score thermometer. */

.s2c-root { width: 100%; }

.s2c-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.s2c-hero { margin-bottom: 0; }
.s2c-h1 {
  font-size: 24px;
  margin: 0 0 2px;
}
.s2c-subtitle {
  font-size: 14px;
  margin: 0 0 2px;
}

.s2c-formula {
  margin: 0;
}

/* ---- Glossary under the formula --------------------------------------- */

.s2c-gloss {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin: -2px 0 4px;
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 13px;
  color: var(--ink-secondary);
}

.s2c-gloss-item {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.s2c-gloss-sym {
  font-family: "KaTeX_Math", "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-weight: 500;
  font-size: 16px;
  color: var(--ink);
}

.s2c-gloss-desc { font-style: italic; }

/* ---- Picker controls -------------------------------------------------- */

.s2c-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: center;
  margin: 4px 0 6px;
}

.s2c-picker-group {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}

.s2c-picker-group label { white-space: nowrap; }

.s2c-picker-group select {
  background: var(--card-bg);
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 3px 8px;
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.s2c-picker-group select:hover { border-color: var(--ink-secondary); }

.s2c-fill-btn {
  background: var(--cnn-pos);
  color: white;
  border: 1px solid var(--cnn-pos);
  border-radius: 3px;
  padding: 4px 12px;
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.s2c-fill-btn:hover { filter: brightness(1.06); }

/* ---- Clickable input cursor ------------------------------------------- */

.s2c-input-clickable { cursor: crosshair; }

/* ---- Top row: patch × filter = product --------------------------------- */

.s2c-toprow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 0;
}

.s2c-card {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 8px 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.s2c-card-label {
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}

.s2c-card-canvas-host {
  width: 170px;
  height: 170px;
}

.s2c-card-canvas-host canvas {
  border-radius: 2px;
}

.s2c-op {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 26px;
  color: var(--ink-secondary);
  line-height: 1;
  padding-bottom: 4px;
}

/* ---- Bottom row: input + heatmap + thermometer ------------------------- */

.s2c-botrow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 0;
}

.s2c-bot-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.s2c-bot-canvas-host {
  width: 196px;
  height: 196px;
}

.s2c-bot-canvas-host canvas {
  border-radius: 2px;
}

/* Score column */

.s2c-score-col {
  min-width: 220px;
  padding-top: 8px;
}

.s2c-therm-host {
  position: relative;
  width: 220px;
  height: 24px;
  margin-top: 6px;
}

.s2c-therm-bg {
  position: absolute;
  inset: 0;
  background: var(--cnn-neutral);
  border: 1px solid var(--rule);
  border-radius: 3px;
}

.s2c-therm-fill {
  position: absolute;
  top: 1px;
  bottom: 1px;
  width: 0%;
  /* No CSS transitions — intentional; redraw is driven by JS at ~30 fps. */
}

.s2c-therm-pos {
  left: 50%;
  background: var(--cnn-green);
  border-radius: 0 2px 2px 0;
}

.s2c-therm-neg {
  right: 50%;
  background: var(--cnn-neg);
  border-radius: 2px 0 0 2px;
}

.s2c-therm-zero {
  position: absolute;
  top: -3px;
  bottom: -3px;
  left: 50%;
  width: 1px;
  background: var(--ink);
  transform: translateX(-0.5px);
}

.s2c-score-readout {
  margin-top: 10px;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  letter-spacing: -0.02em;
  text-align: center;
}

.s2c-score-pos { color: var(--cnn-green); }
.s2c-score-neg { color: var(--cnn-neg); }

/* ---- Caption + footer -------------------------------------------------- */

.s2c-caption {
  margin-top: 4px;
  text-align: left;
  min-height: 1.55em;
}

.s2c-foot { margin-top: 4px; padding-top: 6px; }

/* ---- Narrow viewport fallback ------------------------------------------ */

@media (max-width: 980px) {
  .s2c-toprow { gap: 10px; }
  .s2c-card-canvas-host { width: 160px; height: 160px; }
  .s2c-op { font-size: 22px; }
}