/* ===================================================================
   Shopping Copilot — Judge-Facing Demo: Guided Evidence Tour
   Visual: technical evidence console + polished presentation
   Brand: Shopping Copilot · Built for TikTok TechJam 2026 · Track 4
   =================================================================== */

/* --- Design Tokens ------------------------------------------------- */
:root {
  /* Base palette */
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: #1c2028;
  --border: #30363d;
  --border-light: #484f58;

  /* Text */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;

  /* Competition Evidence (cyan/blue) */
  --evidence-primary: #58a6ff;
  --evidence-secondary: #1f6feb;
  --evidence-bg: rgba(88, 166, 255, 0.08);
  --evidence-border: rgba(88, 166, 255, 0.3);

  /* Demo-only Extension (purple) */
  --demo-primary: #bc8cff;
  --demo-secondary: #8b5cf6;
  --demo-bg: rgba(188, 140, 255, 0.08);
  --demo-border: rgba(188, 140, 255, 0.3);

  /* Unknown / Private boundary (amber) */
  --unknown-primary: #d29922;
  --unknown-bg: rgba(210, 153, 34, 0.08);
  --unknown-border: rgba(210, 153, 34, 0.3);

  /* Success / Hit */
  --success: #3fb950;
  --success-bg: rgba(63, 185, 80, 0.08);

  /* Error */
  --error: #f85149;
  --error-bg: rgba(248, 81, 73, 0.08);

  /* Metrics */
  --metric-highlight: #79c0ff;

  /* Layout */
  --max-width: 1280px;
  --content-padding: 2rem;
  --card-radius: 12px;
  --small-radius: 6px;

  /* Animation */
  --transition-fast: 160ms ease;
  --transition-normal: 240ms ease;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-normal: 0ms;
  }
}

/* --- Reset & Base -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- Top Bar ------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem var(--content-padding);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.topbar .brand {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  white-space: nowrap;
}

.topbar .brand .dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--evidence-primary);
  border-radius: 50%;
  margin-right: 6px;
}

.topbar .sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.topbar-nav {
  margin-left: auto;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.topbar-nav a, .topbar-nav button {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.3rem 0.6rem;
  border-radius: var(--small-radius);
  border: 1px solid transparent;
  background: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topbar-nav a:hover, .topbar-nav button:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.topbar-nav a:focus-visible, .topbar-nav button:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

/* --- Tour Progress Bar --------------------------------------------- */
.tour-progress {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0.75rem var(--content-padding);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tour-progress .step-indicator {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border: 1px solid transparent;
  background: none;
  color: var(--text-muted);
}

.tour-progress .step-indicator:hover {
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}

.tour-progress .step-indicator:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.tour-progress .step-indicator.active {
  color: var(--evidence-primary);
  background: var(--evidence-bg);
  border-color: var(--evidence-border);
  font-weight: 600;
}

.tour-progress .step-indicator.completed {
  color: var(--success);
}

.tour-progress .step-indicator.completed::before {
  content: '✓';
  margin-right: 0.2rem;
}

.tour-progress .step-indicator.demo-step.active {
  color: var(--demo-primary);
  background: var(--demo-bg);
  border-color: var(--demo-border);
}

.tour-progress .step-connector {
  width: 24px;
  height: 1px;
  background: var(--border);
  flex-shrink: 0;
}

/* --- Tour Content Container --------------------------------------- */
.tour-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--content-padding);
  min-height: calc(100vh - 140px);
}

/* --- Tour Steps ---------------------------------------------------- */
.tour-step {
  display: none;
  animation: fadeIn var(--transition-normal) ease;
}

.tour-step.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Cards --------------------------------------------------------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Evidence Badge ------------------------------------------------ */
.evidence-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.evidence-badge.competition {
  color: var(--evidence-primary);
  background: var(--evidence-bg);
  border: 1px solid var(--evidence-border);
}

.evidence-badge.demo-only {
  color: var(--demo-primary);
  background: var(--demo-bg);
  border: 1px solid var(--demo-border);
}

.evidence-badge.unknown {
  color: var(--unknown-primary);
  background: var(--unknown-bg);
  border: 1px solid var(--unknown-border);
}

/* --- Step 0: Hero -------------------------------------------------- */
.hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.5;
}

.hero .metric-grid {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.hero .metric-big {
  text-align: center;
}

.hero .metric-big .value {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--metric-highlight);
  font-variant-numeric: tabular-nums;
}

.hero .metric-big .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero .metric-row {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.hero .metric-sm {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.hero .metric-sm .val {
  font-weight: 600;
  color: var(--metric-highlight);
  font-variant-numeric: tabular-nums;
}

.hero .cta-row {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: var(--evidence-secondary);
  border: none;
  border-radius: var(--small-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background: var(--evidence-primary);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.btn-secondary:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.hero .footer-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 500px;
  margin: 0 auto;
}

.hero .footer-note .unknown-mark {
  color: var(--unknown-primary);
}

/* --- Step 1: Dataset Contract -------------------------------------- */
.contract-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .contract-grid {
    grid-template-columns: 1fr;
  }
}

.contract-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--small-radius);
  background: var(--bg-tertiary);
}

.contract-item .icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  width: 28px;
  text-align: center;
}

.contract-item .detail {
  flex: 1;
}

.contract-item .detail .key {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.contract-item .detail .val {
  font-weight: 600;
  color: var(--text-primary);
}

.scenario-bar {
  display: flex;
  gap: 0;
  border-radius: var(--small-radius);
  overflow: hidden;
  height: 24px;
  margin: 1rem 0;
}

.scenario-bar .segment {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 600;
  color: #fff;
  transition: flex var(--transition-normal);
}

.catalog-sample {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

#catalogSamples {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

#catalogSamples .catalog-sample {
  margin-bottom: 0;
}

#catalogSamples .catalog-sample .text-sm {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

@media (max-width: 1024px) {
  #catalogSamples { grid-template-columns: 1fr; }
}

.catalog-sample .asin {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: monospace;
}

.catalog-sample .title {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0.3rem 0;
}

.catalog-sample .meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

/* --- Step 2: Scenario Replay --------------------------------------- */
.scenario-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.scenario-tab {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.scenario-tab:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.scenario-tab:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.scenario-tab.active {
  color: var(--evidence-primary);
  background: var(--evidence-bg);
  border-color: var(--evidence-border);
}

.replay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-radius: var(--small-radius);
  margin-bottom: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.replay-header code {
  font-family: monospace;
  color: var(--evidence-primary);
}

.replay-stage {
  display: grid;
  grid-template-columns: 300px 1fr 320px;
  gap: 1rem;
  min-height: 400px;
}

@media (max-width: 1024px) {
  .replay-stage {
    grid-template-columns: 1fr;
  }
}

/* Turn timeline (left) */
.turn-timeline {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.turn-card {
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--bg-card);
}

.turn-card:hover {
  border-color: var(--border-light);
}

.turn-card:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.turn-card.active {
  border-color: var(--evidence-primary);
  background: var(--evidence-bg);
}

.turn-card .turn-number {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.turn-card .user-msg {
  font-size: 0.85rem;
  color: var(--text-primary);
  margin: 0.3rem 0;
  line-height: 1.4;
}

.turn-card .agent-msg {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* State panel (center) */
.state-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.state-section {
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--small-radius);
}

.state-section h4 {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.route-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.route-indicator.buying {
  color: var(--evidence-primary);
  background: var(--evidence-bg);
}

.route-indicator.browsing {
  color: var(--demo-primary);
  background: var(--demo-bg);
}

.constraint-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.constraint-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.constraint-chip.hard {
  color: var(--evidence-primary);
  background: var(--evidence-bg);
  border: 1px solid var(--evidence-border);
}

.constraint-chip.soft {
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
}

.constraint-chip.negative {
  color: var(--error);
  background: var(--error-bg);
  border: 1px solid rgba(248, 81, 73, 0.3);
}

.constraint-chip.added {
  outline: 2px solid var(--success);
  outline-offset: 1px;
}

.constraint-chip.added::before {
  content: '+ added';
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--success);
  margin-right: 0.2rem;
}

.constraint-chip.removed {
  text-decoration: line-through;
  opacity: 0.6;
}

.constraint-chip.removed::before {
  content: '✕ removed';
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--error);
  margin-right: 0.2rem;
  text-decoration: none;
}

.constraint-chip.retained::before {
  content: '= retained';
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-right: 0.2rem;
}

/* Results panel (right) */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#top10List {
  overflow-y: auto;
  scrollbar-gutter: stable;
}

.result-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.result-item.is-target {
  border-color: var(--success);
  background: var(--success-bg);
}

.result-item .rank {
  font-weight: 700;
  color: var(--text-muted);
  min-width: 24px;
  font-variant-numeric: tabular-nums;
}

.result-item.is-target .rank {
  color: var(--success);
}

.result-item .asin-title {
  flex: 1;
}

.result-item .asin-title .title {
  color: var(--text-primary);
  display: block;
  line-height: 1.3;
}

.result-item .asin-title .asin {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: monospace;
}

.result-item .target-badge {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--success);
  text-transform: uppercase;
  white-space: nowrap;
}

/* --- Replay Controls ----------------------------------------------- */
.replay-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  margin-top: 1rem;
  border-top: 1px solid var(--border);
}

.replay-controls button {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  border-radius: var(--small-radius);
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.replay-controls button:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.replay-controls button:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.replay-controls button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.replay-controls button.active-control {
  color: var(--evidence-primary);
  border-color: var(--evidence-primary);
}

/* --- Step 3: Mechanism Cards --------------------------------------- */
.mechanism-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 1024px) {
  .mechanism-grid {
    grid-template-columns: 1fr;
  }
}

.mechanism-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mechanism-card:hover {
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.mechanism-card:focus-visible {
  outline: 2px solid var(--evidence-primary);
  outline-offset: 2px;
}

.mechanism-card .mc-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.mechanism-card .mc-detail {
  display: none;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.mechanism-card.expanded .mc-detail {
  display: block;
}

.mechanism-card .mc-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
}

.mechanism-card .mc-row .mc-label {
  font-weight: 600;
  color: var(--text-muted);
  min-width: 100px;
  flex-shrink: 0;
}

/* --- Step 4: Evaluation Evidence ----------------------------------- */
.eval-metrics {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

.eval-metric {
  text-align: center;
  padding: 1rem;
  background: var(--bg-tertiary);
  border-radius: var(--small-radius);
  min-width: 120px;
}

.eval-metric .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--metric-highlight);
  font-variant-numeric: tabular-nums;
}

.eval-metric .label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.version-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.85rem;
}

.version-table th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 2px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.version-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.version-table tr:last-child td {
  border-bottom: none;
}

.version-table tr.current td {
  color: var(--evidence-primary);
  font-weight: 600;
}

.reproduce-drawer {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  padding: 1rem;
  margin-top: 1rem;
}

.reproduce-drawer pre {
  background: var(--bg-primary);
  padding: 0.75rem;
  border-radius: var(--small-radius);
  font-size: 0.8rem;
  overflow-x: auto;
  color: var(--text-secondary);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

/* --- Step 5: Transparent Ads --------------------------------------- */
.demo-banner {
  padding: 0.75rem 1rem;
  background: var(--demo-bg);
  border: 1px solid var(--demo-border);
  border-radius: var(--small-radius);
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--demo-primary);
  line-height: 1.5;
}

.ad-experiment {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

@media (max-width: 1024px) {
  .ad-experiment {
    grid-template-columns: 1fr;
  }
}

.campaign-card {
  padding: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
}

.campaign-card h4 {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.campaign-card .field {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 0.2rem 0;
}

.campaign-card .field .label { color: var(--text-muted); }
.campaign-card .field .value { font-weight: 600; font-variant-numeric: tabular-nums; }

.auction-result {
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  margin-top: 1rem;
}

.organic-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.organic-label {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}

.organic-list {
  margin: 0;
  padding: 0.55rem 0.55rem 0.55rem 1.8rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  color: var(--text-secondary);
  font-size: 0.72rem;
  line-height: 1.5;
}

.sponsored-preview {
  padding: 0.4rem 0.55rem;
  margin-bottom: 0.35rem;
  background: var(--demo-bg);
  border: 1px solid var(--demo-border);
  border-radius: var(--small-radius);
  color: var(--text-secondary);
  font-size: 0.72rem;
}

.demo-only-tag {
  color: var(--demo-primary);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
}

@media (max-width: 1024px) {
  .organic-comparison { grid-template-columns: 1fr; }
}

/* --- Step 6: Closeout ---------------------------------------------- */
.closeout-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 1rem 0;
}

@media (max-width: 1024px) {
  .closeout-links {
    grid-template-columns: 1fr;
  }
}

.closeout-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.closeout-link:hover {
  border-color: var(--evidence-primary);
}

.disabled-link {
  cursor: not-allowed;
  opacity: 0.6;
}

.disabled-link:hover {
  border-color: var(--border);
}

.closeout-quote {
  max-width: 600px;
  margin: 2rem auto;
  text-align: center;
  padding: 1.5rem;
  border-left: 3px solid var(--evidence-primary);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Tour Navigation ----------------------------------------------- */
.tour-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  margin-top: 1rem;
  border-top: 1px solid var(--border);
}

.tour-nav .step-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Utilities ----------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-evidence { color: var(--evidence-primary); }
.text-demo { color: var(--demo-primary); }
.text-unknown { color: var(--unknown-primary); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.8rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mono { font-family: 'SF Mono', 'Fira Code', monospace; }

/* Compact recording layout: keep the decision and controls in one 1440×900 frame. */
@media (min-width: 1200px) and (max-height: 950px) {
  :root { --content-padding: 1.1rem; }
  .card { padding: 1rem; margin-bottom: 0.65rem; }
  .card-header { margin-bottom: 0.65rem; }
  .contract-grid { gap: 0.55rem; }
  .contract-item { padding: 0.5rem 0.65rem; }
  .scenario-bar { margin: 0.55rem 0; }
  .catalog-sample { padding: 0.65rem; }
  .tour-nav { padding: 0.75rem 0; margin-top: 0.5rem; }
  .scenario-tabs, .replay-header { margin-bottom: 0.6rem; }
  .replay-stage { min-height: 0; height: 360px; }
  .turn-timeline, .state-panel, .results-panel { max-height: 360px; overflow-y: auto; }
  #top10List { max-height: 315px; }
  .replay-controls { margin-top: 0.5rem; padding: 0.5rem 0 0; }
}

/* --- 1024px width support ------------------------------------------ */
@media (max-width: 1024px) {
  .hero h1 { font-size: 1.8rem; }
  .hero .metric-big .value { font-size: 1.6rem; }
  .replay-stage { grid-template-columns: 1fr; }
  .mechanism-grid { grid-template-columns: 1fr; }
  .ad-experiment { grid-template-columns: 1fr; }
}

/* --- 200% zoom support --------------------------------------------- */
@media (max-width: 720px) {
  :root {
    --content-padding: 1rem;
  }
  .hero h1 { font-size: 1.4rem; }
  .tour-progress { padding: 0.5rem 1rem; }
  .topbar .sub { display: none; }
}