/* Scene 6 -- "Receptive fields -- the cone of vision."
   Layer-stack visualisation; the input panel sits at left, then five
   columns of feature-map tiles, then a readout. An SVG overlay draws
   the cone from input rect to selected tile. */

.s6-root { width: 100%; }

.s6-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.s6-hero { margin-bottom: 4px; }

/* ---- Board: input + 5 layer columns -------------------------------- */

.s6-board {
  position: relative;
  display: grid;
  grid-template-columns: auto repeat(5, 1fr);
  gap: 16px;
  align-items: start;
  padding: 14px 12px 18px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--card-bg);
}

.s6-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

.s6-cone {
  fill: var(--cnn-pos);
  fill-opacity: 0.10;
  stroke: var(--cnn-pos);
  stroke-opacity: 0.25;
  stroke-width: 0.6;
}

.s6-conn {
  fill: none;
  stroke: var(--cnn-pos);
  stroke-width: 1.2;
  stroke-opacity: 0.55;
}

/* ---- Columns ------------------------------------------------------- */

.s6-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.s6-col-label {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 13px;
  color: var(--ink-secondary);
  text-align: center;
}

/* Input column: hero canvas. */
.s6-col-input { padding-right: 4px; }

.s6-input-host {
  width: 220px;
  height: 220px;
  border: 1px solid var(--rule);
  background: var(--bg);
}

.s6-input-caption {
  text-align: center;
  font-size: 12.5px;
  max-width: 220px;
  margin: 4px 0 0;
}

/* Layer column: stacked 4 panels, then a caption. */
.s6-col-layer { min-width: 0; }

.s6-tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  width: 100%;
  max-width: 92px;
  margin: 0 auto;
}

.s6-panel {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 4px 4px 14px;
  cursor: crosshair;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.s6-panel.selected {
  border-color: var(--cnn-pos);
  border-width: 2px;
  padding: 3px 3px 13px;
}

.s6-panel-canvas {
  width: 84px;
  height: 84px;
}

.s6-panel-tag {
  position: absolute;
  bottom: 1px;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 9px;
  letter-spacing: 0.04em;
  color: var(--ink-secondary);
  text-transform: uppercase;
}

.s6-panel.selected .s6-panel-tag { color: var(--cnn-pos); }

.s6-layer-caption {
  text-align: center;
  font-size: 12px;
  margin-top: 4px;
  max-width: 110px;
  line-height: 1.35;
}

.s6-layer-op {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  color: var(--ink-secondary);
  text-align: center;
  max-width: 130px;
  line-height: 1.35;
  margin: -2px 0 2px;
}

/* ---- Readout strip ------------------------------------------------- */

.s6-readout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--ink);
  padding: 8px 12px;
  text-align: center;
}

.s6-readout-layer {
  font-weight: 600;
  color: var(--cnn-pos);
  letter-spacing: 0.02em;
}

.s6-readout-cell {
  color: var(--ink);
}

.s6-readout-rf {
  color: var(--ink-secondary);
}

.s6-readout-sep {
  color: var(--rule);
}

.s6-bottom-caption {
  text-align: center;
  font-size: 14px;
  margin-top: 4px;
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}

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

@media (max-width: 1080px) {
  .s6-board {
    grid-template-columns: 1fr;
    justify-items: center;
  }
  .s6-overlay { display: none; }
}