/* Scene 9 — What the bottleneck threw away.

   Layout:
     hero
     sample selector strip
     four-panel display: input | GT | no-skip | with-skip
     class legend
     4x zoom viewer
     channel-count diagram (revealed at step 4)
     receptive-field help line (revealed at step 5)
     two accuracy badges + honesty footnote
     caption + step controls */

.s9-root .s9-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.s9-hero h1 { font-size: 28px; }
.s9-hero .lede em { font-style: italic; color: var(--ink); }

.s9-mini-host { align-self: flex-start; }

/* ---------------------------------------------------------------------------
   Sample selector
   --------------------------------------------------------------------------- */

.s9-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 0;
}
.s9-selector-label {
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}
.s9-selector-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.s9-thumb {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 3px;
  cursor: pointer;
  transition: border-color 120ms ease-out, transform 120ms ease-out;
}
.s9-thumb:hover { border-color: var(--ink-secondary); }
.s9-thumb.active {
  border-color: var(--ink);
  box-shadow: 0 0 0 1px var(--ink) inset;
}
.s9-thumb-host canvas {
  image-rendering: pixelated;
  display: block;
}

/* ---------------------------------------------------------------------------
   Four-panel display (input | GT | no-skip | with-skip)
   --------------------------------------------------------------------------- */

.s9-panels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  align-items: start;
}

.s9-panel {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  opacity: 1;
  transition: opacity 220ms ease-out;
}

.s9-p-noskip:not(.s9-visible),
.s9-p-skip:not(.s9-visible) {
  opacity: 0.45;
}

.s9-panel-title {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 14px;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.s9-panel-sub {
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}
.s9-panel-host {
  position: relative;
  margin-top: 2px;
}
.s9-panel-host canvas {
  image-rendering: pixelated;
  border: 1px solid var(--rule);
  border-radius: 3px;
  display: block;
}

/* When any panel is in RF-hover mode, give it a crosshair cursor. */
.s9-rf-on .s9-panel-host canvas { cursor: crosshair; }

.s9-panel-badge {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: center;
  min-height: 1em;
}

.s9-bdg-acc { color: var(--ink); }
.s9-bdg-bnd {
  color: var(--cnn-accent);
  font-style: italic;
  font-size: 10.5px;
}

/* Subtle highlight: when diff overlays are on, wrap each pred panel host with
   a faint warning glow on the no-skip side and a calm one on with-skip. */
.s9-panels.s9-diff-on .s9-p-noskip .s9-panel-host {
  box-shadow: 0 0 0 1px var(--cnn-neg);
}
.s9-panels.s9-diff-on .s9-p-skip .s9-panel-host {
  box-shadow: 0 0 0 1px var(--cnn-pos);
}
.s9-panels.s9-diff-on .s9-p-noskip .s9-panel-host { box-shadow: 0 0 0 1px var(--cnn-neg); }
.s9-panels.s9-diff-on .s9-p-skip   .s9-panel-host { box-shadow: 0 0 0 1px var(--cnn-pos); }

/* Zoom rectangle drawn over each big panel. */
.s9-zoom-rect {
  border: 1.5px dashed var(--cnn-accent);
  background: rgba(192, 138, 62, 0.08);
  border-radius: 1px;
}
:root[data-theme="dark"] .s9-zoom-rect {
  background: rgba(214, 167, 102, 0.10);
}

/* RF overlay (drawn over the input panel). */
.s9-rf-overlay {
  position: absolute;
  border: 1.5px solid var(--cnn-accent);
  background: rgba(192, 138, 62, 0.16);
  border-radius: 1px;
  pointer-events: none;
  transition: opacity 160ms ease-out;
}
:root[data-theme="dark"] .s9-rf-overlay {
  background: rgba(214, 167, 102, 0.18);
}

/* ---------------------------------------------------------------------------
   Class legend
   --------------------------------------------------------------------------- */

.s9-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  padding: 6px 4px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.s9-legend-item {
  display: flex;
  gap: 6px;
  align-items: center;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-secondary);
}
.s9-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--ink-secondary);
}
.s9-swatch.class-sky    { background: var(--class-sky); }
.s9-swatch.class-grass  { background: var(--class-grass); }
.s9-swatch.class-sun    { background: var(--class-sun); }
.s9-swatch.class-tree   { background: var(--class-tree); }
.s9-swatch.class-person { background: var(--class-person); }
.s9-legend-name { color: var(--ink); }

/* ---------------------------------------------------------------------------
   Zoom viewer
   --------------------------------------------------------------------------- */

.s9-zoom-box {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.s9-zoom-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: baseline;
  justify-content: space-between;
}
.s9-zoom-title {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 15px;
  color: var(--ink);
}
.s9-zoom-coords {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-secondary);
}
.s9-zoom-help {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-secondary);
}

.s9-zoom-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  align-items: start;
}
.s9-zoom-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}
.s9-zoom-cell-label {
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}
.s9-zoom-host canvas {
  image-rendering: pixelated;
  border: 1px solid var(--rule);
  border-radius: 3px;
  display: block;
  max-width: 100%;
}

/* ---------------------------------------------------------------------------
   Channel-count diagram (step 4)
   --------------------------------------------------------------------------- */

.s9-channels {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 14px 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease-out;
}
.s9-channels.s9-visible {
  opacity: 1;
  pointer-events: auto;
}
.s9-channels-title {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 2px;
}
.s9-channels-sub {
  font-size: 12px;
  font-style: italic;
  color: var(--ink-secondary);
  margin-bottom: 10px;
}

.s9-channels-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.s9-ch-cell {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 12px;
}
.s9-ch-head {
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  margin-bottom: 6px;
}

.s9-ch-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px dashed var(--rule);
}
.s9-ch-line:last-of-type { border-bottom: none; }

.s9-ch-tile {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 2px 6px;
  background: var(--card-bg);
  color: var(--ink);
}
.s9-ch-tile strong {
  color: var(--cnn-accent);
  font-weight: 700;
}
.s9-ch-up { border-color: var(--ink-secondary); }
.s9-ch-conv { border-color: var(--cnn-pos); color: var(--cnn-pos); }
.s9-ch-skip-tile { border-color: var(--cnn-accent); color: var(--cnn-accent); }

.s9-ch-arrow, .s9-ch-plus {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 16px;
  color: var(--ink-secondary);
  user-select: none;
}
.s9-ch-plus { color: var(--cnn-accent); font-weight: 600; }

.s9-ch-foot {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-secondary);
  margin-top: 6px;
}

/* ---------------------------------------------------------------------------
   Receptive-field help line (step 5)
   --------------------------------------------------------------------------- */

.s9-rf-help {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 13px;
  color: var(--ink-secondary);
  border-left: 2px solid var(--cnn-accent);
  padding: 4px 10px;
  margin: 0;
  opacity: 0;
  transition: opacity 220ms ease-out;
}
.s9-rf-help.s9-visible { opacity: 1; }
.s9-rf-help strong { color: var(--ink); font-style: normal; font-weight: 600; }

/* ---------------------------------------------------------------------------
   Honesty / accuracy badges
   --------------------------------------------------------------------------- */

.s9-honesty {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 10px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.s9-honesty-title {
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}
.s9-honesty-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: stretch;
}
.s9-acc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 12px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  min-width: 140px;
  background: var(--bg);
}
.s9-acc-label {
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-secondary);
}
.s9-acc-value {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}
.s9-acc-ns { border-color: var(--cnn-neg); }
.s9-acc-ws { border-color: var(--cnn-pos); }
.s9-acc-ns .s9-acc-value { color: var(--cnn-neg); }
.s9-acc-ws .s9-acc-value { color: var(--cnn-pos); }

.s9-honesty-note {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-size: 13px;
  color: var(--ink-secondary);
  margin: 0;
}
.s9-honesty-note strong {
  font-style: normal;
  color: var(--ink);
  font-weight: 600;
}
.s9-honesty-note em { color: var(--ink); }

/* ---------------------------------------------------------------------------
   Caption / controls
   --------------------------------------------------------------------------- */

.s9-caption { margin-top: 4px; }
.s9-controls { margin-top: 4px; }

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

@media (max-width: 1100px) {
  .s9-panels { grid-template-columns: 1fr 1fr; }
  .s9-zoom-grid { grid-template-columns: 1fr 1fr; }
  .s9-channels-row { grid-template-columns: 1fr; }
}