:root {
  --bg: #0a0c12;
  --panel: #141821;
  --panel-2: #1a1f2b;
  --border: #252b3a;
  --fg: #e8ecf2;
  --muted: #7b8394;
  --accent: #7cc4ff;

  /* Per-neuromodulator palette. Chosen intentionally:
     warm colors for drive/urgency, cool for rest/relief. */
  --hunger:  #f5a623;  /* amber — drive */
  --liking:  #3ed598;  /* green — satiation, satisfaction */
  --wanting: #ff6b35;  /* fiery orange — pursuit */
  --stress:  #e74c3c;  /* red — alarm */
  --arousal: #a78bfa;  /* violet — neural activation */
  --opioid:  #f3a6d1;  /* pink — relief */
  --anhedonia: #6b7280; /* dull gray-blue — numbness, flatness */

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.35), 0 10px 30px rgba(0, 0, 0, 0.25);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(ellipse at top, #141826 0%, #0a0c12 60%) no-repeat fixed,
    var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  letter-spacing: -0.005em;
  font-feature-settings: "ss01", "cv11";
}

.mono {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* ---------- Header ---------- */

header {
  margin-bottom: 2rem;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #ffffff 0%, #b8c4d8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 60ch;
}

/* ---------- Control strip ---------- */

.control-strip {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.control-label {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-right: 0.5rem;
}

.select-control,
.range-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

select {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  font-family: inherit;
  font-size: 0.9rem;
  min-width: 200px;
  cursor: pointer;
  transition: border-color 120ms ease;
}

select:hover { border-color: #3a4256; }
select:focus { outline: none; border-color: var(--accent); }

.playback {
  display: flex;
  gap: 0.35rem;
}

.icon-btn {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 36px;
  height: 36px;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: all 120ms ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: var(--panel);
  border-color: #3a4256;
  color: #ffffff;
}

.icon-btn:active {
  transform: translateY(1px);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 140px;
  height: 4px;
  background: var(--panel-2);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent);
  transition: transform 120ms ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

#speed-val {
  min-width: 54px;
  text-align: right;
  color: var(--muted);
  font-size: 0.85rem;
}

.range-control {
  margin-left: auto;
}

/* ---------- Stage (canvas) ---------- */

.stage {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  justify-content: center;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

canvas {
  display: block;
  background: #000;
  border-radius: 6px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04),
    inset 0 0 30px rgba(0, 0, 0, 0.5);
}

/* ---------- Cockpit (state bars) ---------- */

.cockpit {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1.5rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.bar {
  display: grid;
  grid-template-columns: 78px 1fr 42px;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  position: relative;
}

.bar .label {
  color: var(--fg);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.bar .label::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bar-color, var(--muted));
  box-shadow: 0 0 8px var(--bar-color, transparent);
}

.bar .track {
  height: 8px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.bar .fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--bar-color) 65%, transparent) 0%,
    var(--bar-color) 100%
  );
  border-radius: 4px;
  box-shadow: 0 0 8px color-mix(in srgb, var(--bar-color) 50%, transparent);
  transition: width 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

.bar .val {
  color: var(--muted);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
  text-align: right;
}

.bar .sub {
  grid-column: 2 / 4;
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.1rem;
  letter-spacing: 0.02em;
}

/* Per-scalar coloring via data attribute */
.bar[data-scalar="hunger"]    { --bar-color: var(--hunger); }
.bar[data-scalar="liking"]    { --bar-color: var(--liking); }
.bar[data-scalar="wanting"]   { --bar-color: var(--wanting); }
.bar[data-scalar="stress"]    { --bar-color: var(--stress); }
.bar[data-scalar="arousal"]   { --bar-color: var(--arousal); }
.bar[data-scalar="opioid"]    { --bar-color: var(--opioid); }
.bar[data-scalar="anhedonia"] { --bar-color: var(--anhedonia); grid-column: span 2; }

/* Pinned-state hint */
.bar.pinned .label::after {
  content: "📌";
  font-size: 0.75rem;
  opacity: 0.6;
  margin-left: 0.25rem;
}

/* ---------- Memory panel (learned cue valences) ---------- */

.memory {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.memory[hidden] { display: none; }

.memory-heading {
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.7rem;
}

.memory-row {
  display: grid;
  grid-template-columns: 78px 1fr 52px;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.memory-row:last-child { margin-bottom: 0; }

.memory-row .cue {
  color: var(--fg);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.memory-row .cue::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cue-color, var(--muted));
  box-shadow: 0 0 8px var(--cue-color, transparent);
}

.memory-row .bipolar-track {
  position: relative;
  height: 6px;
  background: rgba(255,255,255,0.05);
  border-radius: 3px;
  overflow: hidden;
}

.memory-row .bipolar-track::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: rgba(255,255,255,0.15);
}

.memory-row .bipolar-fill {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 0;
  background: var(--liking);
  border-radius: 3px;
  transition: all 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

.memory-row .bipolar-fill.negative {
  background: var(--stress);
}

.memory-row .val {
  color: var(--muted);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
  text-align: right;
}

/* ---------- Scenario info ---------- */

.scenario-info {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.scenario-info h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.scenario-info p {
  margin: 0 0 0.5rem 0;
  color: #c5ccd9;
  font-size: 0.9rem;
}

.scenario-info p:last-child { margin-bottom: 0; }

.scenario-info .watch-for {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.scenario-info .watch-for strong {
  color: var(--fg);
  font-weight: 500;
}

.scenario-knobs {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
}

.knob {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.knob-label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  font-weight: 500;
}

.knob-toggle {
  display: inline-flex;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

.knob-toggle button {
  background: transparent;
  color: var(--muted);
  border: none;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 120ms ease;
}

.knob-toggle button:hover {
  color: var(--fg);
}

.knob-toggle button.active {
  background: var(--accent);
  color: #0a0c12;
  font-weight: 500;
}

/* ---------- Footer ---------- */

footer {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

footer .sep { color: var(--border); }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--fg); }
.muted { color: var(--muted); }

/* ---------- Tight screens ---------- */

@media (max-width: 680px) {
  main { padding: 2rem 1rem; }
  header h1 { font-size: 1.75rem; }
  .control-strip { gap: 0.75rem; }
  .range-control { margin-left: 0; }
  .cockpit { grid-template-columns: 1fr; }
  canvas { max-width: 100%; height: auto; }
}