body {
  background: radial-gradient(circle at top, #f5fafc, #eef2f6 45%, #e6edf3 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

.guide-layout {
  display: grid;
  grid-template-columns: 140px 1fr;
  max-width: 1320px;
  margin: 0 auto;
}

wa-tooltip {
  --max-width: 40ch;
}

.guide-toc {
  align-self: start;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  display: flex;
  align-items: center;
  padding: 0 16px;
}

.toc-items {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  position: relative;
}

.toc-section-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 4px 0 2px 0;
  white-space: nowrap;
}

.toc-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  text-align: left;
  position: relative;
  transition: color 0.3s;
}

.toc-dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg, #fff);
  position: relative;
  z-index: 1;
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
}

.toc-section {
  padding-left: 22px;
}

.toc-section > .toc-section-label {
  margin-left: -22px;
  view-transition-name: toc-section-label;
}

.toc-pill:hover {
  color: var(--ink);
}

.toc-pill:hover .toc-dot {
  border-color: var(--accent);
}

.toc-pill.active {
  color: var(--ink);
  font-weight: 600;
}

.toc-pill.active .toc-dot {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* Intro pillars */

.intro-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0;
}

.intro-pillar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.intro-pillar .pillar-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pillar-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pillar-icon svg {
  width: 20px;
  height: 20px;
}

.pillar-title {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}

.pillar-desc {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
}

@media (max-width: 768px) {
  .intro-pillars {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .intro-pillars {
    grid-template-columns: 1fr;
  }
}

/* Viewport */

.guide-viewport {
  height: calc(100vh - 56px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.step-header {
  width: 100%;
  margin-bottom: 24px;
}

.section-heading {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Step content area */

.step-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 40px 24px 24px;
  max-width: 1140px;
  width: 100%;
  margin: 0 auto;
  view-transition-name: step-content;
}

/* Vertical centering via flexible spacers (shrink to 0 on overflow) */
.step-content::before,
.step-content::after {
  content: '';
  flex: 1 1 0;
}


/* Zone visibility */

.zone {
  display: none;
}

.zone.visible {
  display: block;
}

/* Step layouts */

.guide-viewport[data-step="0"] .step-content,
.guide-viewport[data-step="1"] .step-content,
.guide-viewport[data-step="2"] .step-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.guide-viewport[data-step="3"] .step-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Steps 4 & 5: Side-by-side grid layout */

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .step-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 32px;
  align-content: safe center;
  position: relative;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .step-content::before,
.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .step-content::after {
  display: none;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .step-header {
  grid-column: 1 / -1;
  grid-row: 1;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-scenario {
  grid-row: 2;
  grid-column: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-values {
  grid-row: 2;
  grid-column: 2;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-scenario::after,
.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-values::after {
  content: '';
  flex: 1;
  width: 2px;
  min-height: 20px;
  margin-top: 12px;
  background: var(--border);
  align-self: center;
}

.guide-viewport[data-step="4"] .zone-scenario::after {
  background: transparent;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-decider-baseline {
  grid-row: 3;
  grid-column: 1;
  justify-self: center;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-decider-aligned {
  grid-row: 3;
  grid-column: 2;
  justify-self: center;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-decision-baseline {
  grid-row: 4;
  grid-column: 1;
  min-width: 0;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-decision-aligned {
  grid-row: 4;
  grid-column: 2;
  max-width: none;
  min-width: 0;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decider-card {
  padding: 12px 0;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decider-card::before,
.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decider-card::after {
  content: "";
  display: block;
  width: 2px;
  height: 20px;
  background: var(--border);
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .decider-card::before,
.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decider-card::before {
  display: none;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decider-card::after {
  margin-top: 16px;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decision-stem {
  display: none;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .aligned-decision-card {
  max-width: none;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .decision-panel {
  min-width: 0;
}

.guide-viewport:is([data-step="4"], [data-step="5"], [data-step="6"]) .zone-connectors {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.crossarm-overlay {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.crossarm-overlay path {
  animation: crossarm-fade-in 0.2s ease;
}

@keyframes crossarm-fade-in {
  from { opacity: 0; }
}


.guide-viewport[data-step="7"] .step-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Zone widths */

.zone-scenario,
.zone-decider-baseline,
.zone-decision-baseline,
.zone-values,
.zone-decider-aligned,
.zone-connectors,
.zone-decision-aligned,
.zone-comparison,
.zone-learn-more {
  width: 100%;
}

/* Step 1: Scenario accordion */

.scenario-accordion-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.guide-viewport wa-details {
  display: block;
  --border-color: var(--border);
  --border-radius: 14px;
  --header-padding: 16px 20px;
  --content-padding: 0 20px 20px;
  border-radius: 14px;
  background: var(--surface);
  transition: box-shadow 0.3s ease;
}

.guide-viewport wa-details:hover {
  --border-color: var(--accent);
}

.guide-viewport wa-details[open] {
  --border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.guide-viewport wa-details::part(header) {
  padding: var(--header-padding);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
}

.guide-viewport wa-details::part(content) {
  padding: var(--content-padding);
}

.guide-viewport .scenario-choice-card {
  border: none;
  background: none;
  padding: 4px 0;
}

/* Scenario select card */

.scenario-select-card {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

.scenario-select {
  width: 100%;
  --wa-input-border-radius-medium: 12px;
  --wa-input-font-family: "Space Grotesk", "Segoe UI", sans-serif;
  --wa-input-font-weight-medium: 600;
  --wa-input-font-size-medium: 1rem;
  --wa-input-height-medium: 3rem;
}

.scenario-select::part(combobox) {
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.scenario-select:hover::part(combobox) {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.10);
}

.scenario-select-panel-wrap {
  width: 100%;
  max-width: 640px;
  margin: 12px auto 0;
}

.guide-viewport[data-step="1"] .baseline-scenario-panel::part(icon) {
  display: none;
}

.option-kdma,
.select-kdma {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--muted);
  white-space: nowrap;
}

.scenario-select-panel-wrap .baseline-scenario-panel {
  --border-color: transparent;
  --border-width: 0;
  border: none;
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  margin-bottom: 0;
}

.scenario-select-panel-wrap .baseline-scenario-panel::part(base) {
  border: none;
}

.scenario-select-panel-wrap .baseline-scenario-panel:hover {
  --border-color: transparent;
}

.scenario-select-panel-wrap .baseline-scenario-panel[open] {
  --border-color: transparent;
  box-shadow: none;
}

/* Step 2: Implicit Values — narrow the content */

.guide-viewport[data-step="2"] .zone-scenario,
.guide-viewport[data-step="2"] .zone-decider-baseline,
.guide-viewport[data-step="2"] .zone-decision-baseline {
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Step 2: Baseline decider + decision */

.decider-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 12px 0;
  margin-bottom: 0;
  position: relative;
}

.decider-card::before,
.decider-card::after {
  content: "";
  display: block;
  width: 2px;
  height: 20px;
  background: var(--border);
}

.decider-card::before {
  margin-bottom: 16px;
}

.decider-card::after {
  margin-top: 16px;
}

.decider-node {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 10px 24px;
  box-shadow: 0 4px 16px rgba(8, 31, 56, 0.06);
}

.decider-node-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.decider-node-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.decider-label {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}

.decider-model-name {
  text-transform: uppercase;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 600;
  line-height: 1;
}

.baseline-scenario-panel .accordion-summary {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.baseline-decision-panel .decision-choice {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.accordion-summary-title {
  flex-shrink: 0;
}

.accordion-summary-choices {
  display: flex;
  gap: 10px;
  margin-left: auto;
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
  transition: opacity 0.3s;
}

.baseline-scenario-panel[open] .accordion-summary-choices {
  opacity: 0;
}

.summary-choice-item {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.summary-choice-label {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.summary-choice-item:last-child {
  flex-shrink: 1;
  min-width: 0;
}

.summary-choice-item:last-child .summary-choice-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel-eyebrow {
  text-transform: uppercase;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--muted);
  line-height: 1;
}

.baseline-scenario-panel {
  margin-bottom: 0;
}

.baseline-card .decision-choice {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
}

.decision-choice-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.baseline-card .decision-rationale {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--muted);
}

/* Step 3: Values centered flow */

.values-centered-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.values-centered-flow .flow-input-label,
.values-centered-flow .values-accordion {
  width: 100%;
  max-width: 560px;
}

.values-adm-stem {
  width: 2px;
  height: 28px;
  background: var(--border);
  margin: 12px 0;
}

.aligned-decider-node {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 10px 24px;
  box-shadow: 0 4px 16px rgba(8, 31, 56, 0.06);
}

.aligned-decider-node .decider-node-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.aligned-decider-node .decider-node-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.aligned-decider-node .decider-label {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}

.aligned-decider-node .decider-model-name {
  text-transform: uppercase;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 600;
  line-height: 1;
}

/* Single-value button group (steps 4 & 5) */

.values-single-inline {
  display: grid;
  grid-template-columns: max-content 1fr;
  min-width: 300px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px 8px;
  background: var(--surface);
}

.values-fixed-open::part(header) {
  cursor: default;
}

.values-fixed-open::part(icon) {
  display: none;
}

.values-no-summary::part(header) {
  display: none;
}

.values-no-summary::part(content) {
  padding: 16px 20px;
  overflow: visible;
}

.values-accordion,
.values-accordion::part(content),
.values-accordion::part(base) {
  overflow: visible;
}

/* Step 4: Alignment flow */

.values-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.values-flow-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
}

.values-flow-left,
.values-flow-right {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.values-flow-left wa-details,
.values-flow-right wa-details {
  flex: 1;
}

.values-flow-right {
  display: flex;
  flex-direction: column;
}

.flow-input-label {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 14px;
}

.values-flow .attribute-picker {
  max-width: none;
}

.values-flow-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.connector-lines {
  position: relative;
  width: 100%;
  height: 32px;
  margin-top: 24px;
}

.connector-arm {
  position: absolute;
  top: 0;
  bottom: 0;
}

.connector-arm-left {
  left: calc(25% - 8px);
  right: 50%;
  border-left: 2px solid var(--border);
  border-bottom: 2px solid var(--border);
  border-bottom-left-radius: 8px;
}

.connector-arm-right {
  left: 50%;
  right: calc(25% - 8px);
  border-right: 2px solid var(--border);
  border-bottom: 2px solid var(--border);
  border-bottom-right-radius: 8px;
}

.connector-stem {
  width: 2px;
  height: 20px;
  background: var(--border);
  margin-bottom: 8px;
}

.aligned-decider-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 6px 0;
}

.aligned-decision-stem {
  width: 2px;
  height: 20px;
  background: var(--border);
  margin: 8px auto;
}

.aligned-decision-card {
  width: 100%;
  max-width: 640px;
}

.aligned-decision-card .decision-panel {
  min-width: 0;
}

/* Step 5/6: Comparison flow */

.comparison-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  position: relative;
}

.comparison-flow-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
}

.comparison-input-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.comparison-input-col > wa-details,
.comparison-input-col > [data-comp-scenario] wa-details {
  flex: 1;
}

.guide-viewport .values-accordion {
  margin-bottom: 0;
  min-width: 300px;
  --header-padding: 10px 16px;
  --content-padding: 0 12px 12px;
  background: none;
  border-radius: 0;
}

.values-accordion .attribute-picker {
  max-width: none;
}

.comparison-flow-stems {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
}

.comparison-stem-cell {
  display: flex;
  justify-content: center;
}

.comparison-stem {
  width: 2px;
  height: 28px;
  background: var(--border);
  margin: 8px 0;
}

.comparison-connectors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
  position: relative;
}

.comparison-crossarm {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.comparison-flow-deciders {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
}

.comparison-decider-cell {
  display: flex;
  justify-content: center;
}

.comparison-flow-decisions {
  width: 100%;
}

.comparison-flow-decisions .decision-comparison {
  grid-template-columns: 1fr 1fr;
}

.comparison-flow-decisions .decision-col {
  align-items: stretch;
  min-width: 0;
}

.choice-b {
  background: #2a7d6a;
}

.comparison-flow-decisions .decision-panel {
  min-width: 0;
}

.decision-panel-wrap {
  position: relative;
}

.decision-panel-badge {
  position: absolute;
  top: -8px;
  left: -8px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--surface, #1a1a2e);
  border: 2px solid var(--border, #333);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
  z-index: 1;
  pointer-events: none;
}

.decision-panel .decision-panel-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.decision-panel-choice {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.decision-panel-justification-preview {
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.decision-panel[open] .decision-panel-justification-preview {
  display: none;
}

.decision-rationale-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 4px;
}

/* Sandbox scenario */

.sandbox-scenario-accordion {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scenario-radio-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.scenario-radio-row wa-details {
  flex: 1;
  min-width: 0;
}

.scenario-radio {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  margin-top: 18px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.scenario-radio:hover {
  border-color: var(--accent);
}

.scenario-radio-row.selected .scenario-radio {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.scenario-radio-row.selected wa-details {
  box-shadow: 0 0 0 2px var(--accent);
  border-radius: 8px;
}

.sandbox-values-stem {
  flex: 1;
  min-height: 8px;
  margin-top: 8px;
  margin-bottom: -36px;
  background: var(--border);
  width: 2px;
  align-self: center;
}

.zone-comparison[data-variant="sandbox"] .comparison-connectors .comparison-stem-cell:last-child {
  display: none;
}

/* Step nav */

.step-nav {
  padding: 16px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.scroll-hint {
  margin-left: 12px;
  opacity: 0.35;
}

.scroll-mouse {
  display: block;
  width: 18px;
  height: 28px;
  border: 2px solid var(--muted);
  border-radius: 10px;
  position: relative;
}

.scroll-mouse-wheel {
  position: absolute;
  left: 50%;
  top: 6px;
  width: 3px;
  height: 6px;
  margin-left: -1.5px;
  background: var(--muted);
  border-radius: 2px;
  animation: scroll-wheel-bounce 1.8s ease-in-out infinite;
}

@keyframes scroll-wheel-bounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(4px); opacity: 0.4; }
}

.step-btn {
  padding: 12px 32px;
  border-radius: 12px;
  border: none;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
}

.step-btn-next {
  background: var(--accent);
  color: #fff;
}

.step-btn-next:hover:not(:disabled) {
  filter: brightness(0.85);
  box-shadow: 0 4px 16px var(--accent-light);
}

.step-btn-back {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
}

.step-btn-back:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.step-btn-jump {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.step-btn-jump:hover {
  background: var(--accent-light);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.step-btn[hidden] {
  display: none;
}

/* Learn more */

.learn-more-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 16px;
}

.learn-more-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  text-decoration: none;
  color: var(--ink);
  transition: box-shadow 0.2s, transform 0.2s;
  overflow: hidden;
  max-width: 300px;
}

.learn-more-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.learn-more-thumb {
  width: 100%;
  height: 160px;
  object-fit: cover;
  object-position: top left;
  display: block;
}

.learn-more-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 4px 16px 16px;
}

.learn-more-title {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: 1rem;
}

.learn-more-desc {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Decider thinking state */

.decider-node.thinking .decider-node-icon,
.aligned-decider-node.thinking .decider-node-icon {
  position: relative;
}

.decider-node.thinking .decider-node-icon::after,
.aligned-decider-node.thinking .decider-node-icon::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--accent);
  animation: decider-spin 0.7s linear infinite;
}

@keyframes decider-spin {
  to { transform: rotate(360deg); }
}

.decider-node.thinking,
.aligned-decider-node.thinking {
  animation: decider-pulse 0.8s ease-in-out infinite alternate;
}

@keyframes decider-pulse {
  from { border-color: var(--border); box-shadow: 0 4px 16px rgba(8,31,56,0.06); }
  to { border-color: var(--accent); box-shadow: 0 0 12px var(--accent-light); }
}

/* Decision fade-in */

.decision-fade-in {
  animation: decision-appear 0.3s ease both;
}

@keyframes decision-appear {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

[data-zone^="decision-"] {
  position: relative;
}

.pending-decision > :not(.compute-decision-btn) {
  display: none;
}

.compute-decision-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 58px;
  padding: 16px 20px;
  border: 1px solid var(--accent);
  border-radius: 14px;
  background: var(--surface);
  color: var(--accent);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  box-sizing: border-box;
  transition: background 0.2s, box-shadow 0.2s;
}
.compute-decision-btn:hover {
  background: var(--accent-light);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 1.3em;
  vertical-align: middle;
}
.typing-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: typing-bounce 1.2s ease-in-out infinite;
}
.typing-dots .dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dots .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-4px); }
}

/* SVG connector draw-in animation */

.connector-draw path {
  transition: stroke-dashoffset 0.8s ease;
}

/* View Transitions */

.showcase-nav { view-transition-name: showcase-nav; }
.guide-toc { view-transition-name: guide-toc; }
.step-nav { view-transition-name: step-nav; }
.step-header { view-transition-name: step-header; }

::view-transition-old(showcase-nav),
::view-transition-new(showcase-nav),
::view-transition-old(guide-toc),
::view-transition-new(guide-toc),
::view-transition-old(toc-section-label),
::view-transition-new(toc-section-label),
::view-transition-new(step-nav) {
  animation: none;
}

::view-transition-old(step-nav) {
  animation: none;
  opacity: 0;
}

::view-transition-old(step-header) {
  animation: vt-fade-out 0.3s ease both;
}
::view-transition-new(step-header) {
  animation: vt-fade-in 0.3s ease both;
}

::view-transition-old(step-content) {
  animation: vt-slide-out-left 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}
::view-transition-new(step-content) {
  animation: vt-slide-in-right 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

:root.backward::view-transition-old(step-content) {
  animation: vt-slide-out-right 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}
:root.backward::view-transition-new(step-content) {
  animation: vt-slide-in-left 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

:root.morph-transition::view-transition-old(step-content) {
  animation: vt-fade-out 0.3s ease both;
}
:root.morph-transition::view-transition-new(step-content) {
  animation: vt-fade-in 0.3s ease both;
}

@keyframes vt-fade-out {
  to { opacity: 0; }
}
@keyframes vt-fade-in {
  from { opacity: 0; }
}

@keyframes vt-slide-out-left {
  to { transform: translateX(-50%); opacity: 0; }
}
@keyframes vt-slide-in-right {
  from { transform: translateX(50%); opacity: 0; }
}
@keyframes vt-slide-out-right {
  to { transform: translateX(50%); opacity: 0; }
}
@keyframes vt-slide-in-left {
  from { transform: translateX(-50%); opacity: 0; }
}

@media (max-width: 768px) {
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-toc {
    display: none;
  }

  .step-header {
    margin-bottom: 16px;
  }

  .step-content {
    padding: 24px 20px;
  }

  .section-heading {
    font-size: 1.6rem;
  }

  .values-flow-inputs,
  .comparison-flow-inputs,
  .comparison-flow-stems,
  .comparison-flow-deciders {
    grid-template-columns: 1fr;
  }

  .learn-more-links {
    flex-direction: column;
    align-items: center;
  }

  .learn-more-card {
    max-width: 100%;
  }
}