/* Scene 5 -- "16x16 of pure semantics."

   Layout:
     hero
     sample selector strip
     two-column main: input box (with RF SVG overlay) | 4x4 channel grid
     profile panel (visible from step 2): three side-by-side bar charts
     caption + controls */

.s5-root .s5-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.s5-hero h1 { font-size: 28px; }
.s5-hero .lede em { font-style: italic; color: var(--ink); }

.s5-mini-host { align-self: flex-start; }

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

.s5-selector {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 4px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.s5-selector-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  flex: 0 0 auto;
}
.s5-selector-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  flex: 1 1 auto;
}
.s5-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;
}
.s5-thumb:hover { border-color: var(--ink-secondary); }
.s5-thumb.active {
  border-color: var(--cnn-pos);
  box-shadow: 0 0 0 2px var(--cnn-pos);
  transform: translateY(-1px);
}
.s5-thumb-host { display: block; }
.s5-thumb canvas { display: block; image-rendering: pixelated; }

/* ---------------------------------------------------------------------------
   Main two-column area
   --------------------------------------------------------------------------- */

.s5-main {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
  padding: 16px 8px 22px;
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.s5-input-col,
.s5-chan-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.s5-col-label {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}

.s5-input-box {
  position: relative;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--bg);
}
.s5-input-host {
  position: absolute;
  inset: 0;
}
.s5-input-host canvas {
  display: block;
  image-rendering: pixelated;
}
.s5-rf-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.s5-rf-overlay svg {
  width: 100%;
  height: 100%;
  display: block;
}

.s5-input-note {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-secondary);
}

/* The 4x4 channel grid. Rows size to their content (header + tile body)
   rather than being squeezed into 1fr each, so the bottom tiles don't
   overflow the column. */
.s5-chan-grid {
  display: grid;
  grid-template-columns: repeat(4, auto);
  grid-auto-rows: auto;
  gap: 6px;
  justify-content: start;
}

.s5-chan-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 2px;
  gap: 2px;
}
.s5-chan-tile-head {
  font-size: 10px;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s5-chan-tile-name {
  letter-spacing: 0;
}
.s5-chan-tile-body {
  position: relative;
  background: var(--bg);
}
.s5-chan-tile-body canvas {
  display: block;
  image-rendering: pixelated;
}
.s5-chan-click {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.s5-chan-grid.s5-clickable .s5-chan-click {
  pointer-events: auto;
  cursor: crosshair;
}
.s5-chan-click svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ---------------------------------------------------------------------------
   "What is a 64-dim profile?" primer (between main grid and profile panel)
   --------------------------------------------------------------------------- */

.s5-primer {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 14px;
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--cnn-accent);
  border-radius: 4px;
}
.s5-primer-text {
  flex: 1 1 320px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.s5-primer-eyebrow {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s5-primer-body {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--ink);
}
.s5-primer-body em { font-style: italic; }
.s5-primer-body strong { font-weight: 600; }

.s5-primer-visual {
  flex: 0 1 340px;
  min-width: 280px;
  display: flex;
  justify-content: center;
}
.s5-primer-svg {
  width: 100%;
  max-width: 340px;
  height: auto;
  display: block;
}
.s5-primer-cell {
  fill: var(--bg);
  stroke: var(--rule);
  stroke-width: 0.6;
}
.s5-primer-cell-pick {
  fill: var(--cnn-accent);
  fill-opacity: 0.45;
  stroke: var(--cnn-accent);
  stroke-width: 1.1;
}
.s5-primer-arrow {
  stroke: var(--ink-secondary);
  stroke-width: 1.2;
  fill: none;
}
.s5-primer-arrowhead {
  fill: var(--ink-secondary);
  stroke: none;
}
.s5-primer-baseline {
  stroke: var(--rule);
  stroke-width: 0.8;
}
.s5-primer-bar {
  fill: var(--cnn-accent);
  opacity: 0.85;
}
.s5-primer-label {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 8.5px;
  fill: var(--ink-secondary);
}
.s5-primer-label-pick {
  fill: var(--cnn-accent);
}

/* ---------------------------------------------------------------------------
   Profile panel (step 2)
   --------------------------------------------------------------------------- */

.s5-profile-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  opacity: 0.55;
  transition: opacity 220ms ease-out;
}
.s5-profile-panel.s5-visible {
  opacity: 1;
}
.s5-profile-head {
  font-size: 12px;
  color: var(--ink-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.s5-profile-sub {
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink);
  margin: -2px 0 4px;
}
.s5-profile-sub em { font-style: italic; color: var(--ink-secondary); }
.s5-profile-sub strong { font-weight: 600; }
.s5-profile-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}
.s5-profile-slot {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
  padding: 6px;
  background: var(--bg);
  border: 1px dashed var(--rule);
  border-radius: 3px;
  opacity: 0.5;
  transition: opacity 180ms ease-out, border-style 180ms ease-out;
}
.s5-profile-slot.s5-profile-filled {
  opacity: 1;
  border-style: solid;
}
.s5-profile-slot-head {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--ink-secondary);
  font-family: "SF Mono", Menlo, monospace;
}
.s5-profile-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  border: 1px solid var(--rule);
  background: transparent;
}
.s5-profile-slot-label {
  letter-spacing: 0;
}
.s5-profile-host canvas {
  display: block;
}

.s5-clear-picks {
  align-self: flex-end;
}

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

.s5-caption {
  margin: 4px 4px 0;
  text-align: center;
  font-size: 14.5px;
  min-height: 1.4em;
}
.s5-controls { margin-top: 6px; }

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

@media (max-width: 900px) {
  .s5-main { flex-direction: column; align-items: center; }
}