:root {
  --m03-bg-base: #ffffff;
  --m03-bg-soft: #f8fafc;
  --m03-bg-muted: #eef3f8;
  --m03-text: #0f172a;
  --m03-text-secondary: #475569;
  --m03-muted: #64748b;
  --m03-border: #d7e0ea;
  --m03-primary: #2563eb;
  --m03-primary-soft: #dbeafe;
  --m03-reference: #d97706;
  --m03-observed: #64748b;
  --m03-area: rgba(147, 197, 253, 0.52);
  --m03-warning: #dc2626;
  --m03-radius: 8px;
  --m03-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

body.quarto-dark,
body.dark {
  --m03-bg-base: #111827;
  --m03-bg-soft: #172033;
  --m03-bg-muted: #1e293b;
  --m03-text: #f8fafc;
  --m03-text-secondary: #cbd5e1;
  --m03-muted: #94a3b8;
  --m03-border: rgba(226, 232, 240, 0.18);
  --m03-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
}

body:has(.m03-module-intro) {
  background: var(--m03-bg-base);
  color: var(--m03-text);
}

.m01-module-kicker {
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--m01-accent-primary);
  font-weight: 700;
  margin: 0 0 0.65rem;
}


.m01-kw {
  font-weight: 700;
  color: var(--m03-primary);
  border-bottom: 1px dotted var(--m03-primary);
}

.m03-module-intro {
  max-width: 1180px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 4rem;
}

.m03-lesson-header {
  border-bottom: 1px solid var(--m03-border);
  margin-bottom: 2.2rem;
  padding-bottom: 1.5rem;
}

.m03-lesson-kicker {
  color: var(--m03-primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  margin-bottom: 0.65rem;
  text-transform: uppercase;
}

.m03-lesson-header h1 {
  color: var(--m03-text);
  font-size: clamp(2.1rem, 3.4vw, 3.4rem);
  line-height: 1.05;
  margin: 0;
}

.m03-lesson-header p {
  color: var(--m03-text-secondary);
  font-size: 1rem;
  line-height: 1.65;
  margin: 0.8rem 0 0;
  max-width: 920px;
}

.m03-lesson-section {
  margin: 2.7rem 0;
}

.m03-lesson-section > h2 {
  color: var(--m03-text);
  font-size: 1.65rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.m03-social-question-title {
  color: var(--m03-text);
  font-size: clamp(1.45rem, 2.4vw, 2.2rem);
  line-height: 1.15;
  margin-inline: auto;
  max-width: 850px;
  text-align: center;
}

.m03-social-question-intro {
  color: var(--m03-text-secondary);
  font-size: 1rem;
  hyphens: auto;
  line-height: 1.7;
  margin: 1rem auto 0;
  max-width: 850px;
  text-align: justify;
  text-justify: inter-word;
}

.m03-sequence-flow {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.m03-flow-step {
  border-top: 2px solid var(--m03-border);
  padding-top: 0.95rem;
}

.m03-flow-step h3 {
  color: var(--m03-primary);
  font-size: 1rem;
  margin: 0 0 0.6rem;
}

.m03-flow-step p {
  color: var(--m03-text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0;
}

.m03-lab-breakout,
#m03-lab-root {
  box-sizing: border-box !important;
  margin-left: 50% !important;
  max-width: 100vw !important;
  transform: translateX(-50%) !important;
  width: min(1380px, calc(100vw - 2.5rem)) !important;
}

.m03-lab-surface {
  background: var(--m03-bg-muted);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  box-shadow: var(--m03-shadow);
  padding: 1.25rem;
}

.m03-lab-layout {
  align-items: start;
  display: grid !important;
  gap: 1.75rem !important;
  grid-template-columns: minmax(280px, 320px) minmax(0, 1fr) !important;
  width: 100% !important;
}

.m03-lab-sidebar {
  background: var(--m03-bg-base);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  display: grid;
  gap: 1rem;
  grid-column: 1 / 2 !important;
  min-width: 0;
  padding: 1rem;
}

.m03-lab-main {
  background: var(--m03-bg-base);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  display: grid;
  gap: 1rem;
  grid-column: 2 / 3 !important;
  min-width: 0;
  padding: 1rem;
}

.m03-lab-title {
  grid-column: 1 / -1;
}

.m03-lab-title h3 {
  color: var(--m03-text);
  font-size: 1.35rem;
  margin: 0 0 0.35rem;
}

.m03-lab-title p {
  color: var(--m03-text-secondary);
  line-height: 1.55;
  margin: 0;
  max-width: 900px;
}

.m03-control-group {
  border-top: 1px solid var(--m03-border);
  padding-top: 0.9rem;
}

.m03-control-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.m03-control-title {
  color: var(--m03-text);
  font-size: 0.78rem;
  font-weight: 800;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
}

.m03-button-row,
.m03-segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.m03-btn,
.m03-chip {
  align-items: center;
  background: transparent;
  border: 1px solid var(--m03-border);
  border-radius: 999px;
  color: var(--m03-text);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  min-height: 34px;
  padding: 0.35rem 0.7rem;
}

.m03-btn:hover,
.m03-chip:hover,
.m03-btn:focus-visible,
.m03-chip:focus-visible,
.m03-range input:focus-visible,
.m03-number:focus-visible,
.m03-marker:focus-visible {
  border-color: var(--m03-primary);
  outline: 2px solid rgba(37, 99, 235, 0.22);
  outline-offset: 2px;
}

.m03-chip[aria-pressed="true"],
.m03-btn[aria-pressed="true"] {
  background: var(--m03-primary);
  border-color: var(--m03-primary);
  color: #ffffff;
}

.m03-btn.m03-danger {
  border-color: rgba(220, 38, 38, 0.45);
  color: var(--m03-warning);
}

.m03-range {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.5rem;
}

.m03-range label {
  color: var(--m03-text-secondary);
  font-size: 0.86rem;
  font-weight: 700;
}

.m03-range-line {
  align-items: center;
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 1fr 92px;
}

.m03-range input[type="range"] {
  accent-color: var(--m03-primary);
  width: 100%;
}

.m03-number {
  border: 1px solid var(--m03-border);
  border-radius: 6px;
  color: var(--m03-text);
  min-width: 0;
  padding: 0.35rem 0.45rem;
  width: 100%;
}

.m03-check {
  align-items: center;
  color: var(--m03-text-secondary);
  display: flex;
  font-size: 0.9rem;
  gap: 0.45rem;
  margin-top: 0.45rem;
}

.m03-check input {
  accent-color: var(--m03-primary);
}

.m03-stats-banner {
  display: grid;
  gap: 0.55rem;
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.m03-stat {
  background: var(--m03-bg-soft);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  min-width: 0;
  padding: 0.6rem;
}

.m03-stat span {
  color: var(--m03-muted);
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.m03-stat strong {
  color: var(--m03-text);
  display: block;
  font-size: clamp(0.9rem, 1.4vw, 1.05rem);
  margin-top: 0.2rem;
  overflow-wrap: anywhere;
}

.m03-chart-stage {
  background: linear-gradient(180deg, var(--m03-bg-base), var(--m03-bg-soft));
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  min-height: 620px;
  overflow: hidden;
  padding: 0.75rem;
}

.m03-chart-svg {
  display: block;
  height: 620px;
  width: 100%;
}

.m03-axis,
.m03-grid {
  stroke: var(--m03-border);
}

.m03-hist-bar {
  fill: rgba(100, 116, 139, 0.42);
  stroke: rgba(100, 116, 139, 0.55);
}

.m03-normal-path {
  fill: none;
  stroke: var(--m03-primary);
  stroke-width: 2.4;
}

.m03-area-path {
  fill: var(--m03-area);
  stroke: none;
}

.m03-ref-line {
  stroke: rgba(100, 116, 139, 0.55);
  stroke-dasharray: 4 5;
}

.m03-mean-line {
  stroke: #1d4ed8;
  stroke-width: 2;
}

.m03-score-line,
.m03-z-line {
  stroke: var(--m03-primary);
  stroke-width: 2.5;
}

.m03-bound-line {
  stroke: var(--m03-reference);
  stroke-width: 2.2;
}

.m03-distance {
  stroke: var(--m03-reference);
  stroke-width: 3;
}

.m03-marker {
  cursor: grab;
  fill: var(--m03-primary);
  stroke: #ffffff;
  stroke-width: 2;
}

.m03-marker:active {
  cursor: grabbing;
}

.m03-label,
.m03-axis-label {
  fill: var(--m03-text-secondary);
  font-size: 12px;
}

.m03-title-label {
  fill: var(--m03-text);
  font-size: 15px;
  font-weight: 800;
}

.m03-formula-strip,
.m03-interpretation {
  background: var(--m03-bg-soft);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  color: var(--m03-text-secondary);
  line-height: 1.55;
  padding: 0.8rem;
}

.m03-inline-formula {
  color: var(--m03-text);
  font-weight: 800;
}

.m03-warning-text {
  color: var(--m03-warning);
  font-weight: 700;
}

.m03-compare-panel {
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 1fr 1fr;
  padding: 0.85rem;
}

.m03-compare-row {
  background: var(--m03-bg-soft);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  padding: 0.7rem;
}

.m03-tour-panel {
  align-items: center;
  border-top: 1px solid var(--m03-border);
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  padding-top: 0.8rem;
}

.m03-tour-panel p {
  color: var(--m03-text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

.m03-explainer-section {
  background: var(--m03-bg-base);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  display: grid;
  gap: 1rem;
  grid-template-columns: 260px minmax(0, 1fr);
  padding: 1rem;
}

.m03-explainer-steps {
  display: grid;
  gap: 0.45rem;
}

.m03-explainer-step {
  background: transparent;
  border: 1px solid var(--m03-border);
  border-radius: 6px;
  color: var(--m03-text);
  cursor: pointer;
  font: inherit;
  padding: 0.65rem;
  text-align: left;
}

.m03-explainer-step[aria-pressed="true"] {
  background: var(--m03-primary);
  color: #ffffff;
}

.m03-explainer-stage {
  background: var(--m03-bg-soft);
  border: 1px solid var(--m03-border);
  border-radius: var(--m03-radius);
  min-height: 260px;
  padding: 0.9rem;
}

.m03-explainer-svg {
  display: block;
  height: 180px;
  width: 100%;
}

.m03-interpretation-rows {
  border-top: 1px solid var(--m03-border);
}

.m03-interpretation-row {
  border-bottom: 1px solid var(--m03-border);
  color: var(--m03-text-secondary);
  display: grid;
  gap: 1rem;
  grid-template-columns: 150px minmax(0, 1fr);
  line-height: 1.65;
  padding: 0.9rem 0;
}

.m03-interpretation-row strong {
  color: var(--m03-text);
}

@media (max-width: 1024px) {
  .m03-lab-layout {
    gap: 1rem !important;
    grid-template-columns: minmax(250px, 280px) minmax(0, 1fr) !important;
  }

  .m03-stats-banner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .m03-chart-svg {
    height: 560px;
  }

  .m03-chart-stage {
    min-height: 560px;
  }
}

@media (max-width: 820px) {
  .m03-lab-layout,
  .m03-explainer-section,
  .m03-sequence-flow {
    grid-template-columns: 1fr !important;
  }

  .m03-lab-sidebar,
  .m03-lab-main {
    grid-column: auto !important;
  }
}

@media (max-width: 640px) {
  .m03-module-intro {
    padding: 2rem 1rem 3rem;
  }

  .m03-lab-breakout,
  #m03-lab-root {
    width: calc(100vw - 1rem) !important;
  }

  .m03-lab-surface {
    padding: 0.75rem;
  }

  .m03-stats-banner,
  .m03-compare-panel,
  .m03-interpretation-row {
    grid-template-columns: 1fr;
  }

  .m03-range-line {
    grid-template-columns: 1fr;
  }

  .m03-chart-svg {
    height: 520px;
  }

  .m03-chart-stage {
    min-height: 520px;
  }

  .m03-tour-panel {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .m03-marker,
  .m03-area-path,
  .m03-normal-path {
    transition: none;
  }
}