/* ═══════════════════════════════════════════════════════════════
   PATC — Technical pages (Simulation + Technology) v4
   ═══════════════════════════════════════════════════════════════ */

/* ── Replay shell ─────────────────────────────────────────────── */
.replay-shell {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin: 0 auto 48px;
  max-width: 1200px;
  padding: 20px;
  transition: border-color 0.3s ease;
}
.replay-shell:hover {
  border-color: var(--border-strong);
}
.replay-shell.fixed-mode {
  border-color: rgba(var(--signal-red-rgb), 0.35);
}

/* Toolbar row — scenario + mode on same line */
.replay-toolbar-row {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 16px;
}

/* Legacy toolbar grid (for backward compat) */
.replay-toolbar,
.replay-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr) 340px;
}

/* Buttons */
.scenario-buttons,
.mode-switch,
.replay-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.scenario-btn,
.mode-btn,
.replay-actions button,
.speed-selector button {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 14px;
  transition: all 0.2s ease;
}
.scenario-btn:hover,
.mode-btn:hover,
.replay-actions button:hover,
.speed-selector button:hover {
  border-color: rgba(var(--accent-rgb), 0.3);
}
.scenario-btn.active,
.mode-btn.active,
.replay-actions button.active-control,
.speed-selector button.active-control {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-base);
}

/* Start button override — primary style */
.replay-actions .primary-action {
  font-size: 13px;
  padding: 10px 18px;
}

/* Canvas full-width */
.canvas-stage {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  padding: 14px;
}
.canvas-full {
  width: 100%;
}
.fixed-mode .canvas-stage {
  border-color: rgba(var(--signal-red-rgb), 0.25);
}
#corridorCanvas {
  display: block;
  height: auto;
  width: 100%;
}

/* Controls bar — below canvas */
.replay-controls-bar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  margin-top: 12px;
}

/* Speed selector */
.speed-selector {
  display: flex;
  gap: 4px;
}
.speed-selector button {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 7px 12px;
}

/* ── Metrics below canvas (2-row chip grid) ───────────────────── */
.metrics-below {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}
.metric-row {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.metric-chip {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color 0.2s ease;
}
.metric-chip:hover {
  border-color: rgba(var(--accent-rgb), 0.2);
}
.metric-chip.wide {
  grid-column: span 2;
}
.metric-label {
  color: var(--text-muted);
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.metric-value {
  color: var(--text-primary);
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  font-weight: 700;
  margin-top: 4px;
}

/* Legacy metric panel (kept for backward compat) */
.metric-panel {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  padding: 14px;
}
.fixed-mode .metric-panel {
  border-color: rgba(var(--signal-red-rgb), 0.25);
}

/* Metric list */
.metric-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
}
.metric-list div {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 10px;
}
.metric-list dt {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.metric-list dd {
  font-family: 'JetBrains Mono', monospace;
  font-size: 18px;
  font-weight: 700;
  margin: 3px 0 0;
}

/* Control sliders — styled range inputs */
.control-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 16px;
}
.control-grid label {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: grid;
  gap: 6px;
  padding: 14px;
  transition: border-color 0.25s ease;
}
.control-grid label:hover {
  border-color: rgba(var(--accent-rgb), 0.2);
}
.control-grid span {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.control-grid strong {
  color: var(--signal-green);
  font-family: 'JetBrains Mono', monospace;
}

/* Range input styling */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-subtle);
  border-radius: 4px;
  height: 6px;
  outline: none;
  width: 100%;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  background: var(--accent);
  border: 2px solid var(--bg-base);
  border-radius: 50%;
  cursor: pointer;
  height: 18px;
  width: 18px;
}
input[type="range"]::-moz-range-thumb {
  background: var(--accent);
  border: 2px solid var(--bg-base);
  border-radius: 50%;
  cursor: pointer;
  height: 14px;
  width: 14px;
}

/* ── Tech grids ───────────────────────────────────────────────── */
.stack-grid,
.math-grid,
.contract-grid,
.timeline-list {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}
.stack-grid    { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.math-grid     { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.timeline-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.contract-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.stack-grid article,
.math-grid article,
.contract-grid article,
.timeline-list article,
.equation-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.stack-grid article:hover,
.math-grid article:hover,
.contract-grid article:hover,
.timeline-list article:hover,
.equation-card:hover {
  border-color: rgba(var(--accent-rgb), 0.3);
  transform: translateY(-3px);
}

/* Contract grid details */
.contract-grid dl {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
}
.contract-grid div {
  border-top: 1px solid var(--border-subtle);
  padding-top: 10px;
}
.contract-grid dt {
  color: var(--signal-amber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.contract-grid dd {
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 4px 0 0;
}

/* Math & stack labels */
.math-grid span {
  color: var(--signal-amber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.stack-grid span {
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.stack-grid p { color: var(--text-secondary); line-height: 1.65; }
.math-grid p,
.timeline-list p,
.equation-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Code blocks */
code {
  background: var(--bg-overlay);
  border: 1px solid rgba(var(--signal-green-rgb), 0.12);
  border-radius: var(--radius);
  color: var(--signal-green);
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  overflow-x: auto;
  padding: 12px;
}

.equation-card { margin: 24px 0; }

/* Replay notes */
.replay-notes { padding-top: 48px; }

/* References */
.references ol {
  color: var(--text-secondary);
  display: grid;
  gap: 12px;
  line-height: 1.65;
  padding-left: 24px;
}
.references a {
  color: var(--accent);
  transition: color 0.2s ease;
}
.references a:hover { color: var(--accent-hover); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .replay-toolbar-row { flex-direction: column; align-items: stretch; }
  .replay-toolbar,
  .replay-grid,
  .control-grid,
  .stack-grid,
  .math-grid,
  .contract-grid,
  .timeline-list {
    grid-template-columns: 1fr;
  }
  .metric-row { grid-template-columns: repeat(2, 1fr); }
  .metric-chip.wide { grid-column: span 2; }
  #corridorCanvas { min-width: 0; }
  .replay-shell { padding: 14px; margin-left: 20px; margin-right: 20px; }
}
@media (max-width: 640px) {
  .metric-row { grid-template-columns: 1fr; }
  .metric-chip.wide { grid-column: span 1; }
}