/* Scene 8 — Activation maximization. Pick a neuron, see its essence.

   Layout:
     hero
     selector (3 sub-rows: conv1 / conv2 / conv3)
     two-panel display (AM image | top-9 training images)
     pedagogical caption
     navigation buttons
     footnote
*/

.s8-root { width: 100%; }

.s8-wrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.s8-hero { margin-bottom: 4px; }
.s8-h1   { font-size: 30px; margin: 0 0 6px; line-height: 1.15; letter-spacing: -0.005em; }
.s8-subtitle { font-size: 16px; margin: 0 0 12px; }
.s8-lede { font-size: 16px; max-width: 64ch; margin: 0; }

/* ---- Selector ---------------------------------------------------------- */

.s8-selector {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px;
}

.s8-selector-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.s8-selector-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
  width: 56px;
  flex: 0 0 56px;
  text-align: right;
}

.s8-selector-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.s8-tab {
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}
.s8-tab canvas { display: block; }
.s8-tab:hover { border-color: var(--ink-secondary); }
.s8-tab.selected {
  border: 2px solid var(--cnn-pos);
  /* compensate the +1px border so the box stays the same size */
  width: 44px;
  height: 44px;
}

/* ---- Two-panel display -------------------------------------------------- */

.s8-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 20px;
  align-items: start;
}

.s8-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.s8-panel-label {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 13.5px;
  color: var(--ink-secondary);
  text-align: center;
}

.s8-canvas-host {
  width: 168px;
  height: 168px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}
.s8-canvas-host canvas {
  border: 1px solid var(--rule);
  border-radius: 2px;
  display: block;
}

.s8-identity {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--ink);
  text-align: center;
  letter-spacing: 0.02em;
  margin: 4px 0 0;
}

.s8-pedagogy {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 14.5px;
  color: var(--ink-secondary);
  text-align: center;
  max-width: 64ch;
  margin: 4px auto 0;
  line-height: 1.55;
}

/* ---- Navigation -------------------------------------------------------- */

.s8-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 4px;
}

.s8-nav-btn {
  background: var(--card-bg);
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 5px 12px;
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.s8-nav-btn:hover { border-color: var(--ink-secondary); }
.s8-nav-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.s8-nav-keys {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 12.5px;
  color: var(--ink-secondary);
  margin-left: 8px;
  align-self: center;
}
.s8-nav-keys kbd {
  font-family: "SF Mono", Menlo, monospace;
  font-style: normal;
  font-size: 11px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0 5px;
  background: var(--card-bg);
  color: var(--ink);
}

/* ---- Context card ------------------------------------------------------ */

.s8-context {
  margin-top: 6px;
  padding: 10px 14px 12px;
}

.s8-context-title {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 8px;
}

.s8-context-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.s8-context-block {
  display: flex;
  flex-direction: column;
  gap: 3px;
  border-left: 1px solid var(--rule);
  padding-left: 12px;
}

.s8-context-block:first-child { border-left: none; padding-left: 0; }

.s8-context-block-title {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  margin-bottom: 3px;
}

.s8-context-block-line {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  line-height: 1.45;
}

@media (max-width: 1080px) {
  .s8-context-row { grid-template-columns: 1fr; }
  .s8-context-block {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--rule);
    padding-top: 8px;
  }
  .s8-context-block:first-child { border-top: none; padding-top: 0; }
}

/* ---- Footnote ---------------------------------------------------------- */

.s8-footnote {
  font-size: 11px;
  color: var(--ink-secondary);
  border-top: 1px solid var(--rule);
  padding-top: 8px;
  margin-top: 14px;
  font-style: italic;
  line-height: 1.55;
  max-width: 80ch;
}