/* ---------------------------------------------------------------------------
   NeuRIO interactive replay — the widget that sits where a teaser video would.
   Scoped under .nd-demo so it cannot leak into the rest of the project page.
   Colours come from the project-page variables in css/index.css.
   --------------------------------------------------------------------------- */

.nd-demo {
  --nd-ink: #1e293b;
  --nd-ink-dim: #64748b;
  --nd-ink-faint: #94a3b8;
  --nd-line: #e2e8f0;
  --nd-line-soft: #eef2f7;
  --nd-grid: #dbe3ec;
  --nd-surface: #ffffff;
  --nd-surface-2: #f8fafc;

  display: flex;
  flex-direction: column;
  border: 1px solid var(--nd-line);
  border-radius: var(--border-radius-lg);
  background: var(--nd-surface);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-size: 0.85rem;
  color: var(--nd-ink);
}

/* --- scenario tabs -------------------------------------------------------- */

.nd-tabs {
  display: flex;
  gap: 0.25rem;
  padding: 0.5rem 0.6rem;
  overflow-x: auto;
  background: var(--nd-surface-2);
  border-bottom: 1px solid var(--nd-line);
  scrollbar-width: thin;
}

.nd-tab {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--nd-ink-dim);
  font: inherit;
  line-height: 1.25;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
}

.nd-tab:hover {
  background: var(--nd-surface);
  border-color: var(--nd-line);
}

.nd-tab.on {
  background: var(--nd-surface);
  border-color: var(--primary-color);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.nd-tab .nd-tab-name {
  font-weight: 650;
  font-size: 0.82rem;
  white-space: nowrap;
}

.nd-tab .nd-tab-meta {
  font-size: 0.68rem;
  color: var(--nd-ink-faint);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* --- body: stage + side panel --------------------------------------------- */

.nd-body {
  display: flex;
  align-items: stretch;
  min-height: 0;
}

.nd-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-width: 0;
  background:
    radial-gradient(120% 90% at 50% 0%, #ffffff 0%, #f4f7fb 100%);
}

/* 16:9 is the natural size — where a teaser video would sit — but the canvas
   also grows to absorb whatever extra height the side panel forces on the row,
   so the stage never ends in a band of empty background. */
.nd-canvas-wrap {
  position: relative;
  flex: 1 1 auto;
  width: 100%;
  aspect-ratio: 16 / 9;
}

.nd-demo canvas#nd-scene {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

.nd-demo canvas#nd-scene:active {
  cursor: grabbing;
}

.nd-viewswitch {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  display: flex;
  gap: 0.2rem;
  padding: 0.15rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--nd-line);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.nd-seg {
  padding: 0.2rem 0.65rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--nd-ink-dim);
  font: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.nd-seg.on {
  background: var(--primary-color);
  color: #fff;
}

.nd-hint {
  position: absolute;
  right: 0.6rem;
  top: 0.6rem;
  font-size: 0.68rem;
  color: var(--nd-ink-faint);
  text-align: right;
  pointer-events: none;
}

/* sits under the canvas, not over it: the canvas already paints its own
   legend along the bottom edge */
.nd-note {
  padding: 0.4rem 0.75rem 0.5rem;
  border-top: 1px solid var(--nd-line-soft);
  font-size: 0.7rem;
  line-height: 1.45;
  color: var(--nd-ink-dim);
}

/* --- side panel ----------------------------------------------------------- */

.nd-side {
  flex: 0 0 258px;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.7rem;
  border-left: 1px solid var(--nd-line);
  background: var(--nd-surface-2);
  overflow-y: auto;
}

.nd-block h3 {
  margin: 0 0 0.3rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--nd-ink-faint);
}

.nd-block h3 .nd-unit {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
}

.nd-seqstat {
  font-size: 0.72rem;
  color: var(--nd-ink-dim);
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
}

.nd-seqstat b {
  color: var(--text-primary);
  font-weight: 650;
}

.nd-live {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.nd-live tr {
  cursor: pointer;
  border-bottom: 1px solid var(--nd-line-soft);
}

.nd-live tr:hover {
  background: var(--nd-surface);
}

.nd-live tr.off {
  opacity: 0.35;
}

.nd-live td {
  padding: 0.22rem 0.1rem;
  font-size: 0.72rem;
  white-space: nowrap;
}

.nd-live td.nd-num {
  text-align: right;
  color: var(--nd-ink-dim);
}

.nd-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 0.35rem;
  vertical-align: 1px;
}

.nd-tag {
  display: inline-block;
  margin-left: 0.22rem;
  padding: 0 0.25rem;
  border: 1px solid var(--nd-line);
  border-radius: 3px;
  font-size: 0.56rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--nd-ink-faint);
  background: var(--nd-surface);
}

.nd-tag.on {
  color: #fff;
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.nd-demo canvas.nd-chart {
  display: block;
  width: 100%;
  height: 52px;
  cursor: crosshair;
}

/* --- transport ------------------------------------------------------------ */

.nd-transport {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.7rem;
  border-top: 1px solid var(--nd-line);
  background: var(--nd-surface-2);
  flex-wrap: wrap;
}

.nd-play {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border: 1px solid var(--nd-line);
  border-radius: 50%;
  background: var(--nd-surface);
  color: var(--text-primary);
  font-size: 0.72rem;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
}

.nd-play:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.nd-seek {
  flex: 1 1 160px;
  min-width: 120px;
  accent-color: var(--primary-color);
}

.nd-time {
  flex: 0 0 auto;
  font-size: 0.7rem;
  color: var(--nd-ink-dim);
  font-variant-numeric: tabular-nums;
}

.nd-transport select {
  border: 1px solid var(--nd-line);
  border-radius: 6px;
  background: var(--nd-surface);
  color: var(--nd-ink-dim);
  font: inherit;
  font-size: 0.72rem;
  padding: 0.15rem 0.3rem;
}

.nd-toggles {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  font-size: 0.7rem;
  color: var(--nd-ink-dim);
}

.nd-toggles label {
  display: inline-flex;
  align-items: center;
  gap: 0.22rem;
  cursor: pointer;
}

/* --- loading / failure ---------------------------------------------------- */

.nd-status {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 2rem;
  text-align: center;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--nd-ink-dim);
}

.nd-demo:not(.is-ready) .nd-tabs,
.nd-demo:not(.is-ready) .nd-body,
.nd-demo:not(.is-ready) .nd-transport,
.nd-demo.is-ready .nd-status {
  display: none;
}

/* --- caption under the widget --------------------------------------------- */

.nd-caption {
  margin-top: 0.85rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-secondary);
  text-align: left;
}

.nd-caption b {
  color: var(--text-primary);
}

.nd-caption .nd-key {
  display: inline-block;
  padding: 0 0.3rem;
  border-radius: 3px;
  background: var(--background-accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
}

/* --- narrow screens ------------------------------------------------------- */

@media (max-width: 860px) {
  .nd-body {
    flex-direction: column;
  }
  .nd-side {
    flex: 1 1 auto;
    border-left: none;
    border-top: 1px solid var(--nd-line);
  }
  .nd-canvas-wrap {
    aspect-ratio: 4 / 3;
  }
  .nd-hint {
    display: none;
  }
}