.ns-interactive {
  --ns-ink: #172033;
  --ns-muted: #5e6878;
  --ns-line: #d6dde7;
  --ns-soft: #f4f6f8;
  --ns-blue: #1769aa;
  --ns-blue-dark: #0c4f86;
  --ns-focus: rgba(23, 105, 170, 0.23);
  color: var(--ns-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
}

.ns-interactive *,
.ns-interactive *::before,
.ns-interactive *::after {
  box-sizing: border-box;
}

.ns-intro {
  max-width: 64rem;
  margin: 0 0 1.5rem;
  color: var(--ns-muted);
  font-size: 1.05rem;
}

.ns-notice {
  padding: 0.8rem 1rem;
  border: 1px solid #e0aa27;
  border-radius: 7px;
  background: #fff8db;
}

.ns-app {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.85fr);
  gap: 1rem;
  align-items: start;
}

.ns-stage-card,
.ns-control-card,
.ns-results,
.ns-method {
  border: 1px solid var(--ns-line);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 7px 24px rgba(23, 32, 51, 0.055);
}

.ns-stage-card {
  min-width: 0;
  padding: 1rem;
}

.ns-stage-heading,
.ns-results-heading,
.ns-history-heading,
.ns-group-means-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.ns-stage-heading {
  margin-bottom: 0.8rem;
}

.ns-stage-heading h2,
.ns-control-heading h2,
.ns-results-heading h2,
.ns-history-heading h3,
.ns-group-means-heading h3 {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  color: var(--ns-ink);
  line-height: 1.25;
}

.ns-stage-heading h2,
.ns-control-heading h2,
.ns-results-heading h2 {
  font-size: 1.16rem !important;
}

.ns-history-heading h3,
.ns-group-means-heading h3 {
  font-size: 0.95rem !important;
}

.ns-stage-heading p,
.ns-control-heading p,
.ns-results-heading p,
.ns-history-heading span,
.ns-group-means-heading span {
  margin: 0.15rem 0 0;
  color: var(--ns-muted);
  font-size: 0.82rem;
}

.ns-round-counter {
  flex: 0 0 auto;
  text-align: right;
}

.ns-round-counter > span {
  display: block;
  color: var(--ns-muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.ns-round-counter strong {
  display: block;
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
}

.ns-board-wrap {
  position: relative;
  width: min(100%, 620px);
  margin: 0 auto;
  border: 1px solid #c5cdd8;
  border-radius: 8px;
  background: #eef1f5;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5);
  overflow: hidden;
}

.ns-board {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  cursor: crosshair;
  image-rendering: auto;
  touch-action: manipulation;
}

.ns-board:focus-visible {
  outline: 3px solid var(--ns-focus);
  outline-offset: -3px;
}

.ns-tooltip {
  position: absolute;
  z-index: 5;
  min-width: 11.5rem;
  max-width: 15rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid rgba(23, 32, 51, 0.22);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 6px 20px rgba(23, 32, 51, 0.18);
  color: var(--ns-ink);
  font-size: 0.75rem;
  line-height: 1.45;
  pointer-events: none;
}

.ns-tooltip strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.79rem;
}

.ns-tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.ns-tooltip-row span:first-child {
  color: var(--ns-muted);
}

.ns-view-row {
  display: flex;
  min-height: 3.1rem;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.ns-segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.ns-segmented legend {
  width: 100%;
  margin-bottom: 0.15rem;
  color: var(--ns-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ns-segmented label {
  margin: 0;
}

.ns-segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.ns-segmented span {
  display: block;
  padding: 0.32rem 0.55rem;
  border: 1px solid var(--ns-line);
  border-radius: 999px;
  background: #fff;
  color: var(--ns-muted);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

.ns-segmented input:checked + span {
  border-color: #8db3d3;
  background: #eaf3fa;
  color: var(--ns-blue-dark);
}

.ns-segmented input:focus-visible + span {
  outline: 3px solid var(--ns-focus);
  outline-offset: 1px;
}

.ns-map-legend {
  display: flex;
  flex: 0 1 15rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.3rem 0.55rem;
  color: var(--ns-muted);
  font-size: 0.7rem;
}

.ns-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
}

.ns-legend-swatch {
  width: 0.65rem;
  height: 0.65rem;
  border: 1px solid rgba(23, 32, 51, 0.16);
  border-radius: 2px;
  background: var(--swatch);
}

.ns-gradient-legend {
  display: grid;
  width: 12rem;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.4rem;
  font-variant-numeric: tabular-nums;
}

.ns-gradient-bar {
  height: 0.55rem;
  border: 1px solid rgba(23, 32, 51, 0.14);
  border-radius: 999px;
  background: linear-gradient(90deg, #b6533c, #f6f5f0 50%, #276a9b);
}

.ns-playback {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.ns-button,
.ns-interactive select,
.ns-interactive input[type="number"],
.ns-interactive input[type="text"] {
  min-height: 2.35rem;
  border: 1px solid #aeb8c7;
  border-radius: 6px;
  background: #fff;
  color: var(--ns-ink);
  font: inherit;
}

.ns-button {
  min-width: 4.5rem;
  padding: 0.42rem 0.78rem;
  font-size: 0.88rem;
  font-weight: 650;
  cursor: pointer;
}

.ns-button:hover {
  background: var(--ns-soft);
}

.ns-button-primary {
  border-color: var(--ns-blue);
  background: var(--ns-blue);
  color: #fff;
}

.ns-button-primary:hover {
  background: var(--ns-blue-dark);
}

.ns-button:disabled {
  opacity: 0.48;
  cursor: not-allowed;
}

.ns-button:focus-visible,
.ns-interactive select:focus-visible,
.ns-interactive input:focus-visible {
  outline: 3px solid var(--ns-focus);
  outline-offset: 1px;
}

.ns-speed-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 0 auto;
  color: var(--ns-muted);
  font-size: 0.78rem;
}

.ns-speed-control select {
  min-height: 2.2rem;
  padding: 0.25rem 1.7rem 0.25rem 0.5rem;
  font-size: 0.82rem;
}

.ns-stage-note {
  margin: 0.75rem 0 0;
  color: var(--ns-muted);
  font-size: 0.75rem;
}

.ns-control-card {
  padding: 1rem;
}

.ns-control-heading {
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--ns-line);
}

.ns-control-group {
  padding: 0.8rem 0 0.65rem;
  border-bottom: 1px solid #e7ebf0;
}

.ns-range-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.45rem;
  font-size: 0.84rem;
  font-weight: 650;
}

.ns-help {
  position: relative;
  display: inline-flex;
  margin-left: 0.22rem;
  vertical-align: text-bottom;
}

.ns-help-icon {
  display: inline-flex;
  width: 1.2rem;
  height: 1.2rem;
  align-items: center;
  justify-content: center;
  border: 1px solid #c8d0db;
  border-radius: 50%;
  background: var(--ns-soft);
  color: var(--ns-muted);
  font-size: 0.68rem;
  font-weight: 750;
  line-height: 1;
  cursor: help;
}

.ns-help:focus {
  outline: none;
}

.ns-help:focus-visible .ns-help-icon {
  outline: 3px solid var(--ns-focus);
  outline-offset: 1px;
}

.ns-help-popover {
  position: absolute;
  z-index: 30;
  bottom: calc(100% + 0.55rem);
  left: 50%;
  display: none;
  width: min(19rem, 76vw);
  padding: 0.7rem 0.75rem;
  transform: translateX(-50%);
  border: 1px solid #aeb8c7;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(23, 32, 51, 0.18);
  color: var(--ns-ink);
  font-size: 0.76rem;
  font-weight: 400;
  line-height: 1.42;
  text-align: left;
}

.ns-help-popover::after {
  position: absolute;
  top: 100%;
  left: 50%;
  width: 0.65rem;
  height: 0.65rem;
  transform: translate(-50%, -50%) rotate(45deg);
  border-right: 1px solid #aeb8c7;
  border-bottom: 1px solid #aeb8c7;
  background: #fff;
  content: "";
}

.ns-help:hover .ns-help-popover,
.ns-help:focus .ns-help-popover,
.ns-help:focus-within .ns-help-popover {
  display: block;
}

.ns-help-popover strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.79rem;
}

.ns-range-label .ns-help-popover {
  right: -0.25rem;
  left: auto;
  transform: none;
}

.ns-range-label .ns-help-popover::after {
  right: 0.48rem;
  left: auto;
}

.ns-help-equation {
  display: block;
  margin-top: 0.45rem;
  padding: 0.38rem 0.45rem;
  overflow-x: auto;
  border-radius: 5px;
  background: var(--ns-soft);
  font-size: 0.72rem;
  white-space: nowrap;
}

.ns-help-stat {
  margin-left: 0.15rem;
}

.ns-stat .ns-help-stat {
  display: inline-flex;
}

.ns-stat .ns-help-popover {
  display: none;
  min-height: 0;
  color: var(--ns-ink);
  font-size: 0.76rem;
  font-weight: 400;
  line-height: 1.42;
}

.ns-stat .ns-help:hover .ns-help-popover,
.ns-stat .ns-help:focus .ns-help-popover,
.ns-stat .ns-help:focus-within .ns-help-popover {
  display: block;
}

.ns-stat .ns-help-popover strong {
  min-height: 0;
  margin: 0 0 0.2rem;
  font-size: 0.79rem;
}

.ns-stat .ns-help-equation {
  min-height: 0;
  color: var(--ns-ink);
  font-size: 0.72rem;
  font-weight: 400;
}

.ns-help-plain .ns-help-icon {
  width: 1rem;
  height: 1rem;
  min-width: 1rem;
  min-height: 1rem;
  flex: 0 0 1rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-size: 0.58rem;
}

/* The question-mark glyph is visually top-left-heavy in the site font. */
.ns-help-plain .ns-help-glyph {
  display: block;
  min-height: 0;
  color: inherit;
  font: inherit;
  line-height: 1;
  transform: translate(0.5px, 0.5px);
}

.ns-help-stat .ns-help-popover {
  top: calc(100% + 0.55rem);
  right: -0.25rem;
  bottom: auto;
  left: auto;
  transform: none;
}

.ns-help-stat .ns-help-popover::after {
  top: auto;
  right: 0.48rem;
  bottom: 100%;
  left: auto;
  transform: translateY(50%) rotate(45deg);
  border: 0;
  border-top: 1px solid #aeb8c7;
  border-left: 1px solid #aeb8c7;
}

.ns-help-index {
  flex: 0 0 auto;
  margin-left: -0.15rem;
}

.ns-help-index .ns-help-popover {
  top: calc(100% + 0.55rem);
  bottom: auto;
  width: min(18rem, 76vw);
}

.ns-help-index .ns-help-popover::after {
  top: auto;
  bottom: 100%;
  transform: translate(-50%, 50%) rotate(45deg);
  border: 0;
  border-top: 1px solid #aeb8c7;
  border-left: 1px solid #aeb8c7;
}

.ns-index-chart:first-child .ns-help-index .ns-help-popover {
  left: -1.8rem;
  transform: none;
}

.ns-index-chart:first-child .ns-help-index .ns-help-popover::after {
  left: 2.25rem;
}

.ns-index-chart:last-child .ns-help-index .ns-help-popover {
  right: -0.25rem;
  left: auto;
  transform: none;
}

.ns-index-chart:last-child .ns-help-index .ns-help-popover::after {
  right: 0.48rem;
  left: auto;
}

.ns-range-label output {
  min-width: 2.8rem;
  color: var(--ns-blue-dark);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.ns-control-group input[type="range"] {
  width: 100%;
  accent-color: var(--ns-blue);
}

.ns-control-grid {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 0.7rem;
  padding-top: 0.9rem;
}

.ns-control-grid > label,
.ns-mean-input {
  display: grid;
  gap: 0.25rem;
  margin: 0;
  color: var(--ns-muted);
  font-size: 0.73rem;
  font-weight: 650;
}

.ns-control-grid select,
.ns-control-grid input,
.ns-mean-input input {
  width: 100%;
  padding: 0.38rem 0.5rem;
  font-size: 0.83rem;
}

.ns-seed-field {
  grid-column: 1 / -1;
}

.ns-seed-input {
  display: grid;
  grid-template-columns: 1fr 2.35rem;
}

.ns-seed-input input {
  border-radius: 6px 0 0 6px !important;
}

.ns-seed-input button {
  border: 1px solid #aeb8c7;
  border-left: 0;
  border-radius: 0 6px 6px 0;
  background: var(--ns-soft);
  color: var(--ns-blue-dark);
  font: inherit;
  font-size: 1.15rem;
  cursor: pointer;
}

.ns-group-means {
  margin-top: 1rem;
}

.ns-group-means-heading {
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.ns-group-table {
  display: grid;
  gap: 0.4rem;
}

.ns-group-header,
.ns-group-row {
  display: grid;
  grid-template-columns: minmax(4rem, 1fr) repeat(3, 3.5rem);
  gap: 0.3rem;
  align-items: center;
}

.ns-group-header {
  color: var(--ns-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.025em;
}

.ns-group-header span:not(:first-child) {
  text-align: center;
}

.ns-group-name {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-weight: 650;
}

.ns-group-label {
  display: grid;
  min-width: 0;
}

.ns-group-share {
  color: var(--ns-muted);
  font-size: 0.62rem;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
}

.ns-group-dot {
  width: 0.75rem;
  height: 0.75rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--group-color);
}

.ns-mean-input input {
  min-height: 2rem !important;
  padding: 0.25rem 0.32rem !important;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.ns-results {
  margin-top: 1rem;
  padding: 1rem;
}

.ns-results-heading {
  margin-bottom: 0.8rem;
}

.ns-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.ns-stat {
  position: relative;
  min-width: 0;
  padding: 0.75rem;
  border: 1px solid #e0e5ec;
  border-radius: 8px;
  background: var(--ns-soft);
}

.ns-stat > span:first-child {
  display: block;
  min-height: 2.15em;
  color: var(--ns-muted);
  font-size: 0.72rem;
  font-weight: 650;
  line-height: 1.2;
}

.ns-stat .ns-stat-label-with-help {
  padding-right: 1.25rem;
}

/* A corner-mounted icon leaves the long label free to wrap naturally. */
.ns-stat .ns-help-stat {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  margin: 0;
}

.ns-stat .ns-help-popover {
  white-space: normal;
}

.ns-stat > strong {
  display: block;
  margin-top: 0.35rem;
  color: var(--ns-ink);
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.ns-stat .ns-stat-change {
  display: block;
  min-height: 0;
  margin-top: 0.15rem;
  color: var(--ns-muted);
  font-size: 0.65rem;
  font-weight: 500;
  line-height: 1.25;
  white-space: nowrap;
}

.ns-history-card {
  margin-top: 0.8rem;
  padding: 0.8rem;
  border: 1px solid #e0e5ec;
  border-radius: 8px;
}

.ns-history-heading {
  align-items: flex-start;
  margin-bottom: 0.45rem;
}

.ns-history-heading > div:first-child {
  min-width: 0;
}

.ns-index-tabs {
  display: flex;
  flex: 0 0 auto;
  gap: 0.25rem;
}

.ns-index-tabs button {
  padding: 0.28rem 0.55rem;
  border: 1px solid var(--ns-line);
  border-radius: 999px;
  background: #fff;
  color: var(--ns-muted);
  font: inherit;
  font-size: 0.72rem;
  font-weight: 650;
  cursor: pointer;
}

.ns-index-tabs button[aria-pressed="true"] {
  border-color: #8db3d3;
  background: #eaf3fa;
  color: var(--ns-blue-dark);
}

.ns-index-tabs button:focus-visible {
  outline: 3px solid var(--ns-focus);
  outline-offset: 1px;
}

.ns-index-chart-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 0.75rem;
}

.ns-index-chart {
  min-width: 0;
  padding: 0.65rem;
  border: 1px solid #e0e5ec;
  border-radius: 7px;
  background: #fff;
}

.ns-index-chart-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.ns-index-title,
.ns-index-chart-heading h4 {
  display: flex;
  min-width: 0;
  align-items: center;
}

.ns-index-title {
  gap: 0.2rem;
}

.ns-index-chart-heading h4 {
  gap: 0.38rem;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  font-size: 0.76rem !important;
  line-height: 1.25;
}

.ns-index-chart-heading h4 i {
  width: 1rem;
  height: 0;
  flex: 0 0 auto;
  border-top: 2px solid var(--line-color);
}

.ns-index-reading {
  display: grid;
  flex: 0 0 auto;
  justify-items: end;
}

.ns-index-chart-heading output {
  color: var(--ns-ink);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.ns-index-reading small {
  color: var(--ns-muted);
  font-size: 0.61rem;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
}

.ns-index-chart canvas {
  display: block;
  width: 100%;
  height: 9.5rem;
  margin-top: 0.3rem;
}

.ns-index-note {
  margin: 0.4rem 0 0;
  color: var(--ns-muted);
  font-size: 0.7rem;
  line-height: 1.4;
}

.ns-method {
  margin-top: 1rem;
  overflow: hidden;
}

.ns-method summary {
  padding: 0.85rem 1rem;
  color: var(--ns-ink);
  font-size: 0.94rem;
  font-weight: 700;
  cursor: pointer;
}

.ns-method-body {
  padding: 0 1rem 0.25rem;
  color: var(--ns-muted);
  font-size: 0.88rem;
}

.ns-method-body p {
  max-width: 68rem;
}

.ns-method-body h3 {
  margin: 1.35rem 0 0.45rem !important;
  padding: 0 0 0.25rem !important;
  border-bottom: 1px solid #e5e9ef !important;
  color: var(--ns-ink);
  font-size: 1rem !important;
}

.ns-method-body h3:first-child {
  margin-top: 0.35rem !important;
}

.ns-method-body ol {
  max-width: 66rem;
  padding-left: 1.5rem;
}

.ns-method-body li {
  margin: 0.28rem 0;
}

.ns-method-equation {
  max-width: 68rem;
  margin: 0.7rem 0;
  padding: 0.35rem 0.6rem;
  overflow-x: auto;
  border-left: 3px solid #b8c9d9;
  border-radius: 0 6px 6px 0;
  background: var(--ns-soft);
  color: var(--ns-ink);
}

.ns-method-equation mjx-container[display="true"] {
  margin: 0.5rem 0 !important;
}

@media (max-width: 860px) {
  .ns-app {
    grid-template-columns: 1fr;
  }

  .ns-control-card {
    order: -1;
  }

  .ns-control-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ns-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ns-index-chart-grid {
    grid-template-columns: 1fr;
  }

  .ns-index-chart canvas {
    height: 11rem;
  }
}

@media (max-width: 560px) {
  .ns-stage-card,
  .ns-control-card,
  .ns-results {
    padding: 0.75rem;
  }

  .ns-view-row {
    display: block;
  }

  .ns-map-legend {
    justify-content: flex-start;
    margin-top: 0.65rem;
  }

  .ns-speed-control {
    width: 100%;
    justify-content: flex-end;
  }

  .ns-history-heading {
    display: block;
  }

  .ns-index-tabs {
    margin-top: 0.55rem;
  }

  .ns-group-header,
  .ns-group-row {
    grid-template-columns: minmax(4rem, 1fr) repeat(3, 3.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ns-interactive * {
    scroll-behavior: auto !important;
  }
}