/* ===================================================================
   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: #081018;
  --bg-secondary: #0d1620;
  --bg-tertiary: #121e2a;
  --bg-card: rgba(15, 25, 36, 0.88);
  --border: rgba(139, 180, 210, 0.16);
  --border-light: rgba(139, 205, 240, 0.34);

  /* Text */
  --text-primary: #f2f7fb;
  --text-secondary: #a1b3c1;
  --text-muted: #657989;

  /* Competition Evidence (cyan/blue) */
  --evidence-primary: #66d9ff;
  --evidence-secondary: #3277ff;
  --evidence-bg: rgba(64, 174, 255, 0.10);
  --evidence-border: rgba(102, 217, 255, 0.34);

  /* 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: #9be47a;
  --success-bg: rgba(155, 228, 122, 0.09);

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

  /* Metrics */
  --metric-highlight: #84e5ff;

  /* Layout */
  --max-width: 1320px;
  --content-padding: 2rem;
  --card-radius: 18px;
  --small-radius: 9px;

  /* 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 {
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  font-family: 'Avenir Next', Avenir, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

html[lang='zh-CN'] body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Avenir Next', sans-serif;
}

html[lang='zh-CN'] .card-title,
html[lang='zh-CN'] .closeout-quote,
html[lang='zh-CN'] .prompt-lab-header h3 {
  font-family: 'Songti SC', STSong, 'Noto Serif CJK SC', Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

body::before,
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background:
    radial-gradient(circle at 82% 2%, rgba(43, 120, 255, 0.17), transparent 35rem),
    radial-gradient(circle at 12% 74%, rgba(50, 218, 221, 0.08), transparent 28rem),
    linear-gradient(145deg, #081018 0%, #09131d 46%, #071019 100%);
}

body::after {
  opacity: 0.27;
  background-image:
    linear-gradient(rgba(130, 190, 220, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(130, 190, 220, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

/* --- 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);
}

.case-selector {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin: -0.25rem 0 0.75rem;
}

.case-selector[hidden],
.override-summary[hidden] {
  display: none !important;
}

.case-choice {
  display: grid;
  gap: 0.18rem;
  padding: 0.65rem 0.75rem;
  text-align: left;
  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);
}

.case-choice:hover,
.case-choice.active {
  border-color: var(--evidence-primary);
  background: var(--evidence-bg);
}

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

.case-choice .case-index,
.case-choice code {
  color: var(--text-muted);
  font-size: 0.65rem;
}

.case-choice strong {
  color: var(--text-primary);
  font-size: 0.8rem;
}

.case-choice > span:not(.case-index) {
  font-size: 0.7rem;
  line-height: 1.35;
}

.override-summary {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.override-summary-card {
  min-width: 0;
  padding: 0.55rem 0.65rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--small-radius);
}

.override-summary-card.removed { border-color: rgba(248, 81, 73, 0.35); }
.override-summary-card.retained { border-color: var(--evidence-border); }
.override-summary-card.added { border-color: rgba(63, 185, 80, 0.4); }
.override-summary-card.rank { border-color: var(--unknown-border); }

.override-summary-label {
  margin-bottom: 0.25rem;
  color: var(--text-muted);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.override-summary-value {
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.68rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.override-summary-card.removed .override-summary-value { color: var(--error); }
.override-summary-card.added .override-summary-value { color: var(--success); }
.override-summary-card.rank .override-summary-value:last-child {
  white-space: normal;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.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;
  }
  .case-selector { grid-template-columns: 1fr; }
  .override-summary { grid-template-columns: repeat(2, minmax(0, 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);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - 166px);
  padding: clamp(2.2rem, 5vw, 5.2rem) clamp(0rem, 2vw, 1.5rem) 1.5rem;
  text-align: left;
}

.hero-orbit {
  position: absolute;
  top: 3%;
  right: 4%;
  width: min(42vw, 560px);
  aspect-ratio: 1;
  border: 1px solid rgba(102, 217, 255, 0.10);
  border-radius: 50%;
  opacity: 0.7;
}

.hero-orbit::before,
.hero-orbit::after {
  content: '';
  position: absolute;
  inset: 13%;
  border: 1px dashed rgba(102, 217, 255, 0.08);
  border-radius: inherit;
}

.hero-orbit::after {
  inset: 35%;
  background: radial-gradient(circle, rgba(102, 217, 255, 0.12), transparent 64%);
  border-style: solid;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(390px, 0.85fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 6.8rem);
  max-width: 1180px;
  margin: 0 auto;
}

.hero-copy {
  max-width: 640px;
  animation: heroCopyEnter 620ms 60ms cubic-bezier(.16, .8, .24, 1) both;
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.35rem;
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero-kicker::after {
  content: '';
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, var(--evidence-primary), transparent);
}

.hero-kicker span { color: var(--success); }

.hero h1 {
  margin: 0 0 1.3rem;
  color: var(--text-primary);
  font-size: clamp(3.7rem, 7vw, 6.4rem);
  font-weight: 610;
  line-height: 0.82;
  letter-spacing: -0.075em;
}

.hero h1 span {
  display: inline-block;
  margin-left: 0.72em;
  color: transparent;
  background: linear-gradient(95deg, #83e8ff 0%, #74b9ff 55%, #9be47a 120%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero .subtitle {
  max-width: 560px;
  margin: 0 0 1.75rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.68;
}

.hero .cta-row {
  justify-content: flex-start;
  margin-bottom: 1.45rem;
}

.hero-proofline {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.63rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero-proofline span::before {
  content: '◆';
  margin-right: 0.45rem;
  color: rgba(155, 228, 122, 0.65);
  font-size: 0.5rem;
}

.hero-scorecard {
  position: relative;
  overflow: hidden;
  padding: 1.35rem;
  background: linear-gradient(155deg, rgba(103, 214, 255, 0.09), transparent 38%), rgba(10, 20, 30, 0.84);
  border: 1px solid rgba(113, 205, 247, 0.24);
  border-radius: 20px;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.36), inset 0 1px 0 rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(18px);
  animation: heroScoreEnter 660ms 150ms cubic-bezier(.16, .8, .24, 1) both;
}

.hero-scorecard::after {
  content: 'PUBLIC / 200';
  position: absolute;
  right: -1.5rem;
  bottom: 3.25rem;
  color: rgba(125, 199, 230, 0.045);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 2.9rem;
  font-weight: 700;
  letter-spacing: -0.08em;
  transform: rotate(-90deg);
}

.scorecard-head,
.scorecard-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.scorecard-head {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.scorecard-live { color: var(--success); }

.scorecard-live i {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.4rem;
  background: currentColor;
  border-radius: 50%;
  box-shadow: 0 0 12px currentColor;
}

.hero .metric-grid {
  justify-content: flex-start;
  margin: 1.55rem 0 1.25rem;
}

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

.hero .metric-big .value {
  color: var(--text-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: clamp(3.3rem, 5.4vw, 5.3rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.085em;
  text-shadow: 0 0 34px rgba(102, 217, 255, 0.16);
}

.hero .metric-big .label {
  margin-top: 0.5rem;
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  letter-spacing: 0.12em;
}

.hero .metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-bottom: 1.4rem;
  border-block: 1px solid var(--border);
}

.hero .metric-sm {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0.8rem;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero .metric-sm + .metric-sm { border-left: 1px solid var(--border); }

.hero .metric-sm .val {
  color: var(--text-primary);
  font-size: 1.08rem;
  letter-spacing: -0.03em;
}

.scorecard-signal {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 42px;
  margin-bottom: 1rem;
}

.scorecard-signal span {
  flex: 1;
  min-width: 0;
  height: 30%;
  background: linear-gradient(to top, rgba(62, 127, 255, 0.38), rgba(102, 217, 255, 0.8));
  border-radius: 2px 2px 0 0;
  opacity: 0.72;
}

.scorecard-signal span:nth-child(2) { height: 42%; }
.scorecard-signal span:nth-child(3) { height: 36%; }
.scorecard-signal span:nth-child(4) { height: 59%; }
.scorecard-signal span:nth-child(5) { height: 68%; }
.scorecard-signal span:nth-child(6) { height: 77%; }
.scorecard-signal span:nth-child(7) { height: 88%; }
.scorecard-signal span:nth-child(8) { height: 100%; background: linear-gradient(to top, #398cff, var(--success)); }

.scorecard-foot {
  justify-content: flex-start;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.hero .footer-note {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 1.2rem;
  max-width: 1180px;
  margin: clamp(2.1rem, 5vw, 4.2rem) auto 0;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.62rem;
  line-height: 1.5;
}

.hero .footer-note > div:last-child { text-align: right; }

@keyframes heroCopyEnter {
  from { opacity: 0; transform: translateX(-18px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes heroScoreEnter {
  from { opacity: 0; transform: translateX(22px) rotateY(-3deg); }
  to { opacity: 1; transform: translateX(0) rotateY(0); }
}

/* Evidence components */
.contract-grid { gap: 0.75rem; }

.contract-item,
.catalog-sample,
.state-section,
.result-item,
.eval-metric,
.campaign-card,
.reproduce-drawer,
.closeout-link {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent), rgba(16, 29, 41, 0.82);
  border: 1px solid rgba(135, 190, 219, 0.14);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.contract-item {
  min-height: 72px;
  padding: 0.8rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.contract-item:hover,
.catalog-sample:hover {
  border-color: var(--evidence-border);
  transform: translateY(-1px);
}

.contract-item .icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: var(--evidence-primary);
  background: rgba(102, 217, 255, 0.06);
  border: 1px solid rgba(102, 217, 255, 0.14);
  border-radius: 9px;
}

.contract-item .detail .key,
.catalog-sample .asin,
.replay-header,
.replay-header code,
.state-section h4,
.override-summary-label,
.result-item .asin-title .asin,
.version-table th,
.reproduce-drawer pre,
.organic-label,
.tour-nav .step-label,
.mono {
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.scenario-bar {
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: inset 0 1px 5px rgba(0, 0, 0, 0.25);
}

#catalogSamples { gap: 0.65rem; }

.catalog-sample {
  position: relative;
  overflow: hidden;
  min-height: 130px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.catalog-sample::after {
  content: '';
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 76px;
  height: 76px;
  border: 1px solid rgba(102, 217, 255, 0.09);
  border-radius: 50%;
}

.scenario-tabs {
  width: fit-content;
  padding: 0.28rem;
  background: rgba(4, 11, 17, 0.42);
  border: 1px solid var(--border);
  border-radius: 11px;
}

.scenario-tab {
  min-height: 34px;
  padding: 0.45rem 0.85rem;
  background: transparent;
  border-color: transparent;
  border-radius: 7px;
  font-size: 0.78rem;
}

.scenario-tab.active {
  color: #e7faff;
  background: linear-gradient(135deg, rgba(51, 129, 255, 0.24), rgba(80, 215, 255, 0.10));
  border-color: rgba(102, 217, 255, 0.25);
  box-shadow: 0 5px 16px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.case-selector { gap: 0.55rem; }

.case-choice {
  position: relative;
  overflow: hidden;
  padding: 0.72rem 0.78rem;
  background: rgba(13, 25, 36, 0.8);
  border-color: rgba(135, 190, 219, 0.14);
  border-radius: 10px;
}

.case-choice::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--evidence-primary), var(--success));
  transition: width var(--transition-normal);
}

.case-choice:hover::after,
.case-choice.active::after { width: 100%; }

.case-choice.active {
  background: linear-gradient(145deg, rgba(55, 136, 255, 0.13), rgba(102, 217, 255, 0.045));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.override-summary { gap: 0.42rem; }

.override-summary-card {
  position: relative;
  overflow: hidden;
  padding: 0.62rem 0.7rem;
  background: rgba(11, 23, 33, 0.82);
  border-color: rgba(135, 190, 219, 0.13);
  border-radius: 10px;
}

.override-summary-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: rgba(145, 192, 218, 0.28);
}

.override-summary-card.removed::before { background: var(--error); }
.override-summary-card.retained::before { background: var(--evidence-primary); }
.override-summary-card.added::before { background: var(--success); }
.override-summary-card.rank::before { background: var(--unknown-primary); }

.replay-header {
  padding: 0.65rem 0.9rem;
  background: rgba(6, 14, 21, 0.42);
  border: 1px solid rgba(135, 190, 219, 0.11);
  border-radius: 10px;
}

.replay-stage { gap: 0.7rem; }

.turn-timeline,
.state-panel,
.results-panel {
  padding: 0.55rem;
  background: rgba(5, 13, 20, 0.30);
  border: 1px solid rgba(135, 190, 219, 0.10);
  border-radius: 12px;
}

.turn-card {
  background: rgba(15, 28, 40, 0.72);
  border-color: rgba(135, 190, 219, 0.13);
  border-radius: 9px;
}

.turn-card.active {
  background: linear-gradient(145deg, rgba(55, 136, 255, 0.14), rgba(102, 217, 255, 0.05));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16), inset 3px 0 0 var(--evidence-primary);
}

.state-section {
  padding: 0.72rem;
  border-radius: 9px;
}

.constraint-chip {
  border-radius: 7px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.68rem;
}

.result-item {
  border-radius: 9px;
}

.result-item.is-target {
  background: linear-gradient(145deg, rgba(155, 228, 122, 0.12), rgba(87, 168, 255, 0.045));
  border-color: rgba(155, 228, 122, 0.55);
  box-shadow: 0 0 24px rgba(155, 228, 122, 0.06), inset 3px 0 0 var(--success);
}

.replay-controls button {
  min-height: 34px;
  background: rgba(16, 29, 41, 0.78);
  border-color: rgba(135, 190, 219, 0.16);
  border-radius: 8px;
}

.mechanism-grid { gap: 0.75rem; counter-reset: mechanism; }

.mechanism-card {
  position: relative;
  overflow: hidden;
  min-height: 132px;
  padding: 1.2rem 1.2rem 1.2rem 4.4rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent), rgba(15, 27, 39, 0.84);
  border-color: rgba(135, 190, 219, 0.15);
  counter-increment: mechanism;
}

.mechanism-card::before {
  content: '0' counter(mechanism);
  position: absolute;
  top: 1.1rem;
  left: 1.1rem;
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.mechanism-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 3.25rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border), transparent);
}

.mechanism-card:hover {
  border-color: var(--evidence-border);
  transform: translateY(-3px);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.2);
}

.mechanism-card.expanded {
  background: linear-gradient(145deg, rgba(55, 136, 255, 0.10), rgba(15, 27, 39, 0.88));
  border-color: var(--evidence-border);
}

.eval-metrics {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.65rem;
}

.eval-metric {
  min-width: 0;
  padding: 1rem 0.8rem;
  text-align: left;
  border-radius: 11px;
}

.eval-metric .value {
  color: var(--text-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 1.45rem;
  font-weight: 520;
  letter-spacing: -0.05em;
}

.eval-metric .label {
  margin-top: 0.25rem;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.version-table {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 10px;
  border-collapse: separate;
  border-spacing: 0;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.75rem;
}

.version-table th {
  background: rgba(5, 13, 20, 0.45);
}

.version-table th,
.version-table td { padding: 0.65rem 0.72rem; }

.version-table tr.current td {
  color: #dcf8ff;
  background: linear-gradient(90deg, rgba(46, 126, 255, 0.13), rgba(102, 217, 255, 0.035));
  border-bottom-color: rgba(102, 217, 255, 0.18);
}

.reproduce-drawer { border-radius: 11px; }

.reproduce-drawer pre {
  background: rgba(3, 9, 14, 0.72);
  border: 1px solid rgba(135, 190, 219, 0.10);
}

#step5 .card {
  background: linear-gradient(145deg, rgba(188, 140, 255, 0.045), transparent 42%), var(--bg-card);
}

#step5 .card::before {
  background: linear-gradient(90deg, transparent, rgba(188, 140, 255, 0.48), transparent);
}

.demo-banner {
  background: linear-gradient(110deg, rgba(188, 140, 255, 0.13), rgba(96, 65, 170, 0.06));
  border-color: rgba(188, 140, 255, 0.32);
  border-radius: 10px;
  box-shadow: inset 3px 0 0 var(--demo-primary);
}

.campaign-card {
  border-radius: 11px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.campaign-card:hover {
  transform: translateY(-2px);
  border-color: var(--demo-border);
}

.auction-result {
  background: rgba(11, 22, 32, 0.76);
  border-color: rgba(188, 140, 255, 0.20);
}

.closeout-link {
  min-height: 58px;
  border-radius: 11px;
}

.closeout-link:hover {
  background: linear-gradient(135deg, rgba(50, 119, 255, 0.10), rgba(102, 217, 255, 0.04));
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

.closeout-quote {
  position: relative;
  max-width: 720px;
  padding: 1.8rem 2rem;
  background: rgba(12, 24, 35, 0.65);
  border: 1px solid var(--border);
  border-left: 3px solid var(--evidence-primary);
  border-radius: 0 14px 14px 0;
  text-align: left;
}

.tour-nav {
  border-color: rgba(135, 190, 219, 0.12);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (min-width: 1200px) and (max-height: 950px) {
  .hero {
    min-height: calc(100vh - 130px);
    padding-top: 3rem;
  }
  .hero h1 { font-size: clamp(3.5rem, 6vw, 5.6rem); }
  .hero .footer-note { margin-top: 2rem; }
}

@media (max-width: 1024px) {
  .topbar-status { display: none; }
  .tour-progress { justify-content: flex-start; }
  .hero { padding-top: 2.6rem; }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    max-width: 760px;
  }
  .hero h1 { font-size: clamp(3.6rem, 11vw, 5.7rem); }
  .hero-scorecard { max-width: 620px; }
  .hero .footer-note {
    grid-template-columns: 1fr;
    gap: 0.55rem;
    max-width: 760px;
  }
  .hero .footer-note > div:last-child { text-align: left; }
  .eval-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .topbar { gap: 0.55rem; }
  .topbar-nav a { padding-inline: 0.45rem; }
  .hero { padding-top: 2rem; }
  .hero h1 {
    font-size: clamp(3rem, 17vw, 4.4rem);
    line-height: 0.88;
  }
  .hero h1 span { margin-left: 0.32em; }
  .hero .subtitle { font-size: 0.94rem; }
  .hero .cta-row { display: grid; }
  .hero .metric-row { grid-template-columns: 1fr; }
  .hero .metric-sm + .metric-sm {
    border-top: 1px solid var(--border);
    border-left: 0;
  }
  .hero-proofline { display: grid; gap: 0.5rem; }
  .hero-orbit { width: 78vw; }
  .eval-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mechanism-card { padding-left: 3.7rem; }
  .mechanism-card::after { left: 2.8rem; }
}

/* ===================================================================
   Viewport fit pass — one primary scroll surface per step
   =================================================================== */

.reproduce-drawer,
.limitations-drawer {
  padding: 0;
  overflow: hidden;
}

.reproduce-drawer > summary,
.limitations-drawer > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.72rem 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 620;
  list-style: none;
}

.reproduce-drawer > summary::-webkit-details-marker,
.limitations-drawer > summary::-webkit-details-marker { display: none; }

.reproduce-drawer > summary::after,
.limitations-drawer > summary::after {
  content: '+';
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  color: var(--evidence-primary);
  border: 1px solid var(--evidence-border);
  border-radius: 6px;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.reproduce-drawer[open] > summary::after,
.limitations-drawer[open] > summary::after { content: '−'; }

.drawer-hint {
  margin-left: auto;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.drawer-content {
  padding: 0 0.9rem 0.9rem;
  border-top: 1px solid var(--border);
}

.reproduce-drawer .drawer-content { padding-top: 0.75rem; }
.limitations-drawer .drawer-content { margin: 0; padding-top: 0.65rem; }

@media (min-width: 1200px) and (max-height: 950px) {
  :root { --content-padding: 0.85rem; }

  .topbar {
    min-height: 50px;
    padding-block: 0.48rem;
  }

  .tour-progress {
    min-height: 42px;
    padding-block: 0.32rem;
  }

  .tour-content {
    padding-top: 0.7rem;
    padding-bottom: 0;
    min-height: calc(100vh - 92px);
  }

  .card {
    padding: 0.82rem;
    margin-bottom: 0.55rem;
    border-radius: 14px;
  }

  .card-header { margin-bottom: 0.42rem; }
  .card-title { font-size: 1.05rem; }
  .card-subtitle { font-size: 0.58rem; }

  .tour-nav {
    padding: 0.5rem 0;
    margin-top: 0.3rem;
  }

  .tour-nav .btn-primary,
  .tour-nav .btn-secondary {
    min-height: 40px;
    padding: 0.55rem 1rem;
    font-size: 0.82rem;
  }

  .hero {
    min-height: calc(100vh - 106px);
    padding-top: 2.15rem;
    padding-bottom: 0.7rem;
  }

  .hero-grid { gap: 4.2rem; }
  .hero h1 { font-size: clamp(3.5rem, 5.8vw, 5.25rem); }
  .hero .subtitle { margin-bottom: 1.25rem; }
  .hero .cta-row { margin-bottom: 1rem; }
  .hero .footer-note { margin-top: 1.45rem; }

  #step1 .contract-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.42rem;
  }

  #step1 .contract-item {
    min-height: 56px;
    padding: 0.48rem 0.55rem;
  }

  #step1 .contract-item .icon {
    width: 28px;
    height: 28px;
    font-size: 0.95rem;
  }

  #step1 .scenario-bar { height: 25px; margin: 0.42rem 0; }
  #step1 #scenarioLegend { margin-bottom: 0 !important; }
  #step1 #catalogSamples .catalog-sample { min-height: 104px; padding: 0.58rem; }
  #step1 #catalogSamples .catalog-sample .title { font-size: 0.82rem; }

  #step2 .card-header { margin-bottom: 0.35rem; }
  #step2 .scenario-tabs { margin-bottom: 0.42rem; }
  #step2 .scenario-tab { min-height: 30px; padding-block: 0.32rem; }
  #step2 .case-selector { gap: 0.42rem; margin-bottom: 0.42rem; }
  #step2 .case-choice { padding: 0.42rem 0.58rem; }
  #step2 .case-choice > span:not(.case-index) {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
  }
  #step2 .override-summary { gap: 0.35rem; margin-bottom: 0.42rem; }
  #step2 .override-summary-card { padding: 0.38rem 0.52rem; }
  #step2 .override-summary-label { margin-bottom: 0.12rem; font-size: 0.56rem; }
  #step2 .override-summary-value { font-size: 0.61rem; line-height: 1.25; }
  #step2 .replay-header { padding: 0.42rem 0.65rem; margin-bottom: 0.42rem; }
  #step2 .replay-stage { height: 330px; gap: 0.5rem; }
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel {
    height: 330px;
    max-height: none;
    padding: 0.42rem;
    overflow: hidden;
  }
  #step2 .turn-timeline { gap: 0.32rem; }
  #step2 .turn-card { padding: 0.42rem 0.5rem; }
  #step2 .turn-card .user-msg {
    display: -webkit-box;
    overflow: hidden;
    margin: 0.18rem 0;
    line-height: 1.3;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }
  #step2 .turn-card .agent-msg {
    display: -webkit-box;
    overflow: hidden;
    line-height: 1.25;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
  }
  #step2 .state-panel { gap: 0.32rem; }
  #step2 .state-section { padding: 0.4rem 0.48rem; }
  #step2 .state-section h4 { margin-bottom: 0.24rem; font-size: 0.65rem; }
  #step2 .constraint-list { gap: 0.2rem; }
  #step2 .constraint-chip { padding: 0.1rem 0.38rem; font-size: 0.62rem; }
  #step2 #top10List { max-height: 280px; overflow-y: auto; }
  #step2 .result-item { padding: 0.38rem 0.48rem; font-size: 0.72rem; }
  #step2 .replay-controls { margin-top: 0.35rem; padding-top: 0.35rem; }
  #step2 .replay-controls button { min-height: 31px; padding: 0.3rem 0.65rem; }

  #step3 .mechanism-grid { gap: 0.5rem; }
  #step3 .mechanism-card {
    min-height: 96px;
    padding: 0.72rem 0.8rem 0.72rem 3.7rem;
  }
  #step3 .mechanism-card::before { top: 0.75rem; left: 0.9rem; }
  #step3 .mechanism-card::after { left: 2.85rem; }
  #step3 .mechanism-card .mc-title { margin-bottom: 0.2rem; font-size: 0.88rem; }
  #step3 .mechanism-card .mc-detail { margin-top: 0.42rem; padding-top: 0.42rem; }

  #step4 .eval-metrics { gap: 0.48rem; margin: 0.55rem 0; }
  #step4 .eval-metric { padding: 0.62rem; }
  #step4 .eval-metric .value { font-size: 1.22rem; }
  #step4 .mt-2 { margin-top: 0.55rem; }
  #step4 .version-table { margin: 0.38rem 0; }
  #step4 .version-table th,
  #step4 .version-table td { padding: 0.38rem 0.62rem; }
  #step4 .reproduce-drawer { margin-top: 0.55rem; }
  #step4 .reproduce-drawer > summary { padding: 0.55rem 0.72rem; }

  #step6 .closeout-links { gap: 0.45rem; margin: 0.55rem 0; }
  #step6 .closeout-link { min-height: 46px; padding: 0.5rem 0.75rem; }
  #step6 .limitations-drawer { margin-top: 0.55rem; }
  #step6 .limitations-drawer > summary { padding: 0.55rem 0.72rem; }
  #step6 .closeout-quote { margin: 0.72rem auto; padding: 0.85rem 1.1rem; line-height: 1.55; }
  #step6 #teamContributions { margin-top: 0.55rem !important; font-size: 0.68rem; line-height: 1.45; }
}

@media (min-width: 1200px) and (max-height: 820px) {
  #step2 .replay-stage,
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel { height: 310px; }
  #step2 #top10List { max-height: 260px; }
}

@media (max-width: 1024px) {
  #step1 .contract-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  #step2 .replay-stage { height: auto !important; }
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel {
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
  }
  #step2 #top10List { max-height: none !important; overflow: visible !important; }
  #step2 .turn-card .user-msg,
  #step2 .turn-card .agent-msg {
    display: block;
    overflow: visible;
  }
  .drawer-hint { display: none; }
}

@media (min-width: 721px) and (max-width: 1024px) {
  #step2 .case-selector { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  #step2 .override-summary { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  #step1 .contract-grid { grid-template-columns: 1fr; }
  .version-table { display: block; overflow-x: auto; white-space: nowrap; }
}

.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; }
  .override-active .replay-stage { height: 300px; }
  .turn-timeline, .state-panel, .results-panel { max-height: 360px; overflow-y: auto; }
  .override-active .turn-timeline,
  .override-active .state-panel,
  .override-active .results-panel { max-height: 300px; }
  #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; }
}

/* ===================================================================
   Visual refresh — premium technical dossier
   =================================================================== */

.topbar {
  min-height: 58px;
  padding: 0.65rem max(var(--content-padding), calc((100vw - var(--max-width)) / 2));
  background: rgba(8, 16, 24, 0.78);
  border-color: rgba(123, 183, 215, 0.14);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.18);
}

.topbar .brand {
  font-size: 0.9rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.topbar .brand .dot {
  width: 9px;
  height: 9px;
  margin-right: 8px;
  background: var(--success);
  box-shadow: 0 0 0 5px rgba(155, 228, 122, 0.08), 0 0 18px rgba(155, 228, 122, 0.35);
}

.topbar .sub {
  padding-left: 1rem;
  border-left: 1px solid var(--border);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.topbar-status {
  display: inline-flex;
  align-items: center;
  min-height: 23px;
  padding: 0.2rem 0.55rem;
  color: var(--evidence-primary);
  background: rgba(102, 217, 255, 0.06);
  border: 1px solid rgba(102, 217, 255, 0.16);
  border-radius: 999px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar-nav { gap: 0.2rem; }

.topbar-nav a,
.topbar-nav button {
  padding: 0.38rem 0.72rem;
  font-size: 0.73rem;
  letter-spacing: 0.02em;
}

.tour-progress {
  justify-content: center;
  min-height: 52px;
  padding: 0.55rem var(--content-padding);
  background: rgba(9, 18, 27, 0.72);
  border-color: rgba(123, 183, 215, 0.11);
  backdrop-filter: blur(14px);
}

.tour-progress .step-indicator {
  min-height: 28px;
  padding: 0.32rem 0.72rem;
  border-radius: 7px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.015em;
}

.tour-progress .step-indicator.active {
  color: #dff8ff;
  background: linear-gradient(135deg, rgba(64, 151, 255, 0.19), rgba(75, 222, 255, 0.08));
  border-color: rgba(102, 217, 255, 0.38);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 0 20px rgba(59, 166, 255, 0.08);
}

.tour-progress .step-connector {
  width: clamp(10px, 2vw, 28px);
  background: linear-gradient(90deg, var(--border), rgba(102, 217, 255, 0.16));
}

.tour-content { position: relative; z-index: 1; }

.tour-step.active {
  animation: dossierEnter 360ms cubic-bezier(.2, .75, .25, 1) both;
}

@keyframes dossierEnter {
  from { opacity: 0; transform: translateY(12px); filter: blur(3px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent 38%), var(--bg-card);
  border-color: rgba(132, 188, 218, 0.17);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(16px);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 2rem;
  right: 2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(102, 217, 255, 0.38), transparent);
}

.card-header { align-items: flex-start; }

.card-title {
  font-size: 1.2rem;
  font-weight: 630;
  letter-spacing: -0.025em;
}

.card-subtitle {
  margin-top: 0.12rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.evidence-badge {
  min-height: 24px;
  padding: 0.24rem 0.62rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.09em;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.btn-primary,
.btn-secondary {
  min-height: 46px;
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  text-decoration: none;
}

.btn-primary {
  color: #06111b;
  background: linear-gradient(135deg, #8be9ff, #57a8ff 72%);
  box-shadow: 0 12px 30px rgba(63, 163, 255, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.58);
}

.btn-primary:hover {
  color: #02080c;
  background: linear-gradient(135deg, #b3f1ff, #72b7ff);
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(63, 163, 255, 0.31), inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.025);
  border-color: rgba(145, 191, 218, 0.2);
}

.btn-secondary:hover {
  color: var(--text-primary);
  background: rgba(102, 217, 255, 0.055);
  border-color: var(--evidence-border);
  transform: translateY(-1px);
}

/* Final responsive precedence for the refreshed hero. */
@media (max-width: 1024px) {
  .topbar-status { display: none; }
  .tour-progress { justify-content: flex-start; }
  .hero { padding-top: 2.6rem; }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    max-width: 760px;
  }
  .hero h1 { font-size: clamp(3.6rem, 11vw, 5.7rem); }
  .hero-scorecard { max-width: 620px; }
  .hero .footer-note {
    grid-template-columns: 1fr;
    gap: 0.55rem;
    max-width: 760px;
  }
  .hero .footer-note > div:last-child { text-align: left; }
  .eval-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .topbar { gap: 0.55rem; }
  .topbar-nav a { padding-inline: 0.45rem; }
  .hero { padding-top: 2rem; }
  .hero h1 {
    font-size: clamp(3rem, 17vw, 4.4rem);
    line-height: 0.88;
  }
  .hero h1 span { margin-left: 0.32em; }
  .hero .subtitle { font-size: 0.94rem; }
  .hero .cta-row { display: grid; }
  .hero .metric-row { grid-template-columns: 1fr; }
  .hero .metric-sm + .metric-sm {
    border-top: 1px solid var(--border);
    border-left: 0;
  }
  .hero-proofline { display: grid; gap: 0.5rem; }
  .hero-orbit { width: 78vw; }
  .eval-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mechanism-card { padding-left: 3.7rem; }
  .mechanism-card::after { left: 2.8rem; }
}

/* Final shell precedence: legacy and visual layers above must not re-expand it. */
@media (min-width: 1200px) and (max-height: 950px) {
  .topbar {
    min-height: 50px;
    padding-block: 0.48rem;
  }

  .tour-progress {
    min-height: 42px;
    padding-block: 0.32rem;
  }

  .tour-content {
    min-height: calc(100vh - 92px);
    padding-top: 0.7rem;
    padding-bottom: 0;
  }

  .card {
    padding: 0.82rem;
    margin-bottom: 0.55rem;
    border-radius: 14px;
  }

  .card-header { margin-bottom: 0.42rem; }
  .card-title { font-size: 1.05rem; }
  .card-subtitle { font-size: 0.58rem; }

  .tour-nav {
    padding: 0.5rem 0;
    margin-top: 0.3rem;
  }

  .tour-nav .btn-primary,
  .tour-nav .btn-secondary {
    min-height: 40px;
    padding: 0.55rem 1rem;
    font-size: 0.82rem;
  }

  .hero {
    min-height: calc(100vh - 106px);
    padding-top: 2.15rem;
    padding-bottom: 0.7rem;
  }

  #step2 .replay-stage,
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel { height: 345px; }

  #step2 .turn-card {
    padding: 0.32rem 0.42rem;
  }

  #step2 .turn-card .turn-number { font-size: 0.61rem; }
  #step2 .turn-card .user-msg { font-size: 0.76rem; line-height: 1.18; }
  #step2 .turn-card .agent-msg { font-size: 0.69rem; line-height: 1.15; }

  #step2 .state-panel { gap: 0.2rem; }
  #step2 .state-section { padding: 0.3rem 0.42rem; }
  #step2 .state-section h4 { margin-bottom: 0.12rem; }
  #step2 .constraint-list { gap: 0.14rem; }
  #step2 .constraint-chip { padding-block: 0.07rem; }
  #step2 #top10List { max-height: 295px; }
}

@media (min-width: 1200px) and (max-height: 820px) {
  #step2 .replay-stage { height: auto; }
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel {
    height: auto;
    min-height: 360px;
    overflow: visible;
  }
  #step2 #top10List { max-height: 300px; overflow-y: auto; }

  #step4 .card { padding: 0.65rem 0.78rem; }
  #step4 .card-header { margin-bottom: 0.25rem; }
  #step4 .eval-metrics { margin: 0.32rem 0; }
  #step4 .eval-metric { padding: 0.42rem 0.55rem; }
  #step4 .eval-metric .value { font-size: 1.05rem; }
  #step4 .eval-metric .label { margin-top: 0.1rem; }
  #step4 .mt-2 { margin-top: 0.32rem; }
  #step4 .mb-1 { margin-bottom: 0.22rem; }
  #step4 .version-table { margin: 0.24rem 0; font-size: 0.7rem; }
  #step4 .version-table th,
  #step4 .version-table td { padding: 0.25rem 0.55rem; }
  #step4 .reproduce-drawer { margin-top: 0.35rem; }
  #step4 .reproduce-drawer > summary { padding: 0.4rem 0.62rem; }
}

@media (min-width: 721px) and (max-width: 1024px) {
  #step2 .replay-stage {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  #step2 .results-panel { grid-column: 1 / -1; }

  #step2 #top10List {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.42rem;
  }

  #step2 .result-item { min-height: 66px; }
}

.auction-action {
  margin: 0.75rem 0;
  text-align: center;
}

@media (min-width: 1200px) and (max-height: 820px) {
  .topbar { display: none; }

  .tour-content {
    min-height: calc(100vh - 42px);
    padding-top: 0.45rem;
  }

  #step2 > .card { padding: 0.58rem 0.68rem; }
  #step2 .card-header { min-height: 26px; margin-bottom: 0.2rem; }
  #step2 .card-header .card-subtitle { display: none; }
  #step2 .scenario-tabs { margin-bottom: 0.28rem; }
  #step2 .scenario-tab { min-height: 28px; padding-block: 0.25rem; }
  #step2 .case-selector { margin-bottom: 0.28rem; }
  #step2 .case-choice { padding: 0.28rem 0.52rem; }
  #step2 .override-summary { margin-bottom: 0.28rem; }
  #step2 .replay-header { display: none; }
  #step2 .replay-stage,
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel { height: 345px; min-height: 0; }
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel { overflow: hidden; }
  #step2 .replay-controls { min-height: 32px; margin-top: 0.22rem; padding-top: 0.22rem; }
  #step2 .replay-controls button { min-height: 28px; padding-block: 0.22rem; }
  #step2 .tour-nav { min-height: 46px; padding-block: 0.3rem; }
}

@media (min-width: 1200px) and (max-height: 950px) {
  #step5.auction-complete .demo-banner {
    padding: 0.45rem 0.7rem;
    margin-bottom: 0.45rem;
    line-height: 1.3;
  }

  #step5.auction-complete .ad-experiment {
    gap: 0.5rem;
    margin: 0.4rem 0;
  }

  #step5.auction-complete .campaign-card {
    display: grid;
    grid-template-columns: 1.2fr repeat(3, minmax(72px, 0.55fr));
    align-items: center;
    gap: 0.55rem;
    padding: 0.48rem 0.65rem;
  }

  #step5.auction-complete .campaign-card h4 { margin: 0; }
  #step5.auction-complete .campaign-card .field {
    display: grid;
    gap: 0.05rem;
    padding: 0;
  }

  #step5.auction-complete .auction-action { display: none; }
  #step5.auction-complete .auction-result { padding: 0.62rem; margin-top: 0.45rem; }
  #step5.auction-complete #auctionDetails > div { line-height: 1.35 !important; }
  #step5.auction-complete .organic-comparison { gap: 0.45rem; margin-bottom: 0.4rem; }
  #step5.auction-complete .organic-list { padding-block: 0.35rem; line-height: 1.35; }
  #step5.auction-complete .sponsored-preview { padding-block: 0.28rem; }
  #step5.auction-complete .card > .text-sm.mt-2 { margin-top: 0.45rem; line-height: 1.35 !important; }
}

/* Ranking-first replay story */
#step2 .case-choice .case-index { display: none; }
#step2 .replay-header { display: none; }
#step2 .override-summary { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.rank-journey {
  display: grid;
  grid-template-columns: minmax(220px, 0.62fr) minmax(0, 1.38fr);
  align-items: center;
  gap: 0.7rem;
  min-height: 52px;
  padding: 0.32rem 0.55rem;
  margin-bottom: 0.4rem;
  background: linear-gradient(110deg, rgba(52, 131, 255, 0.10), rgba(13, 27, 39, 0.72));
  border: 1px solid rgba(102, 217, 255, 0.20);
  border-radius: 10px;
}

.rank-journey-target {
  display: grid;
  min-width: 0;
}

.rank-journey-target > span {
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.53rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.rank-journey-target strong {
  overflow: hidden;
  color: var(--text-primary);
  font-size: 0.72rem;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-journey-target code {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.55rem;
}

.rank-journey-target em {
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.56rem;
  font-style: normal;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-journey-target em b {
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
}

.rank-track {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  min-width: 0;
}

.rank-node {
  display: grid;
  flex: 1 1 0;
  min-width: 0;
  padding: 0.24rem 0.34rem;
  background: rgba(5, 14, 21, 0.5);
  border: 1px solid var(--border);
  border-radius: 7px;
}

.rank-node .rank-turn,
.rank-node small {
  overflow: hidden;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.47rem;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-node strong {
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.61rem;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-node.hit { border-color: rgba(155, 228, 122, 0.44); }
.rank-node.hit strong { color: var(--success); }
.rank-node.preview { border-color: rgba(102, 217, 255, 0.28); }
.rank-node.preview strong { color: var(--evidence-primary); }
.rank-node.active {
  background: rgba(102, 217, 255, 0.10);
  box-shadow: 0 0 0 1px var(--evidence-primary), 0 0 20px rgba(102, 217, 255, 0.08);
}

.rank-arrow {
  flex: 0 0 auto;
  color: var(--text-muted);
  font-size: 0.62rem;
}

.results-heading {
  display: grid;
  gap: 0.08rem;
  margin-bottom: 0.28rem;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

#recommendationDelta {
  color: var(--evidence-primary);
  font-size: 0.5rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.movement-badge {
  display: inline-flex;
  margin-left: 0.3rem;
  padding: 0.02rem 0.24rem;
  color: var(--evidence-primary);
  background: rgba(102, 217, 255, 0.08);
  border: 1px solid rgba(102, 217, 255, 0.16);
  border-radius: 4px;
  font-size: 0.52rem;
}

.result-item.is-target-preview {
  border-color: rgba(102, 217, 255, 0.38);
  border-style: dashed;
  background: rgba(102, 217, 255, 0.045);
}

.result-item .target-badge.preview { color: var(--evidence-primary); }

#step2 .state-section.is-empty { display: none; }

#step2 .turn-timeline.long-trace { gap: 0.22rem; }

#step2 .turn-timeline.long-trace .turn-card {
  padding: 0.22rem 0.38rem;
}

#step2 .turn-timeline.long-trace .turn-card .turn-number {
  font-size: 0.54rem;
}

#step2 .turn-timeline.long-trace .turn-card .user-msg,
#step2 .turn-timeline.long-trace .turn-card .agent-msg {
  display: block;
  overflow: hidden;
  margin: 0.04rem 0;
  font-size: 0.64rem;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#step2 .turn-timeline.long-trace .turn-card .agent-msg {
  color: var(--text-muted);
  font-size: 0.58rem;
}

@media (min-width: 1200px) and (max-height: 950px) {
  #step2 .case-choice { padding-block: 0.32rem; }
  #step2 .replay-stage,
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel { height: 345px; }
}

@media (max-width: 1024px) {
  .rank-journey { grid-template-columns: 1fr; }
  .rank-track { overflow-x: auto; padding-bottom: 0.2rem; }
  .rank-node { min-width: 92px; }
  #step2 .override-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Compact ranking readability at the default 1280×720 viewport. */
@media (min-width: 1200px) and (max-height: 820px) {
  #step2 .case-choice > span:not(.case-index) {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
  }

  #step2 .rank-journey {
    grid-template-columns: minmax(420px, 0.8fr) minmax(0, 1.2fr);
    min-height: 68px;
    padding: 0.42rem 0.62rem;
  }

  #step2 .rank-journey-target > span { font-size: 0.58rem; }
  #step2 .rank-journey-target strong { font-size: 0.82rem; }
  #step2 .rank-journey-target em { font-size: 0.64rem; }
  #step2 .rank-journey-target em b { font-size: 0.56rem; }

  #step2 .rank-node { padding: 0.31rem 0.38rem; }
  #step2 .rank-node .rank-turn,
  #step2 .rank-node small { font-size: 0.52rem; }
  #step2 .rank-node strong { font-size: 0.7rem; }

  #step2 .replay-stage,
  #step2 .turn-timeline,
  #step2 .state-panel,
  #step2 .results-panel { height: 315px; }

  #step2 #top10List { max-height: 245px; }

  #step2.override-active .override-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  #step2.override-active .override-summary-card.before,
  #step2.override-active .override-summary-card.after { display: none; }

  #step2.override-active .override-summary-card { padding: 0.25rem 0.42rem; }
  #step2.override-active .override-summary-label { font-size: 0.5rem; }
  #step2.override-active .override-summary-value { font-size: 0.56rem; line-height: 1.15; }

  #step2.override-active .replay-stage,
  #step2.override-active .turn-timeline,
  #step2.override-active .state-panel,
  #step2.override-active .results-panel { height: 290px; }

  #step2.override-active #top10List { max-height: 220px; }

  #step2.override-active .turn-card { padding: 0.24rem 0.38rem; }
  #step2.override-active .turn-card .user-msg,
  #step2.override-active .turn-card .agent-msg {
    display: block;
    overflow: hidden;
    margin: 0.05rem 0;
    font-size: 0.65rem;
    line-height: 1.15;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  #step2.override-active .turn-card .agent-msg { color: var(--text-muted); font-size: 0.58rem; }
  #step2 .tour-nav { min-height: 40px; padding-block: 0.22rem; }
}

/* Trace Microscope — mechanism inspection */
.mechanism-context {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) 150px;
  gap: 0.55rem;
  margin-bottom: 0.55rem;
}

.mechanism-context > div {
  display: grid;
  align-content: center;
  min-width: 0;
  padding: 0.48rem 0.62rem;
  background: rgba(7, 16, 24, 0.48);
  border: 1px solid var(--border);
  border-radius: 9px;
}

.mechanism-context span {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.52rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.mechanism-context strong {
  overflow: hidden;
  color: var(--text-primary);
  font-size: 0.68rem;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mechanism-context-rank.hit strong { color: var(--success); }
.mechanism-context-rank.preview strong { color: var(--evidence-primary); }

.mechanism-pipeline {
  display: flex;
  align-items: stretch;
  gap: 0.3rem;
  margin-bottom: 0.55rem;
}

.mechanism-pipeline > i {
  display: grid;
  place-items: center;
  flex: 0 0 12px;
  color: var(--text-muted);
  font-size: 0.62rem;
  font-style: normal;
}

.mechanism-stage {
  position: relative;
  display: grid;
  flex: 1 1 0;
  min-width: 0;
  padding: 0.48rem 0.58rem;
  overflow: hidden;
  text-align: left;
  color: var(--text-secondary);
  background: rgba(12, 24, 35, 0.76);
  border: 1px solid var(--border);
  border-radius: 9px;
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

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

.mechanism-stage.active {
  color: var(--text-primary);
  background: linear-gradient(145deg, rgba(51, 131, 255, 0.18), rgba(102, 217, 255, 0.06));
  border-color: var(--evidence-primary);
  box-shadow: inset 0 -2px 0 var(--success), 0 8px 22px rgba(0, 0, 0, 0.16);
}

.mechanism-stage > span {
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.5rem;
}

.mechanism-stage > strong {
  overflow: hidden;
  font-size: 0.7rem;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mechanism-stage > small {
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.52rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mechanism-inspector {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 0.55rem;
  min-height: 215px;
  margin-bottom: 0.55rem;
}

.mechanism-explanation,
.mechanism-evidence {
  min-width: 0;
  padding: 0.72rem 0.82rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent), rgba(12, 24, 35, 0.78);
  border: 1px solid rgba(132, 188, 218, 0.16);
  border-radius: 11px;
}

.mechanism-kicker,
.mechanism-evidence-title {
  color: var(--evidence-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.54rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mechanism-evidence-title {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.45rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.mechanism-evidence-title code {
  color: var(--text-muted);
  text-transform: none;
}

.mechanism-explanation h3 {
  margin: 0.1rem 0 0.28rem;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
}

.mechanism-decision {
  color: var(--text-secondary);
  font-size: 0.72rem;
  line-height: 1.45;
}

.mechanism-contract {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.4rem;
  margin: 0.62rem 0;
}

.mechanism-contract > div {
  padding: 0.45rem 0.5rem;
  background: rgba(5, 14, 21, 0.44);
  border: 1px solid var(--border);
  border-radius: 7px;
}

.mechanism-contract dt {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.48rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.mechanism-contract dd {
  margin: 0.12rem 0 0;
  color: var(--text-secondary);
  font-size: 0.58rem;
  line-height: 1.3;
}

.mechanism-proof {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.48rem;
  border-top: 1px solid var(--border);
  font-size: 0.6rem;
}

.mechanism-proof span { color: var(--success); }
.mechanism-proof code { color: var(--text-muted); font-size: 0.52rem; }

.evidence-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.42rem;
}

.evidence-stat {
  display: grid;
  padding: 0.5rem 0.58rem;
  background: rgba(5, 14, 21, 0.46);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.evidence-stat span {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.48rem;
  text-transform: uppercase;
}

.evidence-stat strong {
  overflow: hidden;
  color: var(--text-primary);
  font-size: 0.72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.evidence-stat.evidence strong { color: var(--evidence-primary); }

.state-diff-evidence {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.4rem;
}

.mechanism-diff-column {
  display: grid;
  align-content: start;
  gap: 0.18rem;
  min-height: 120px;
  padding: 0.5rem;
  background: rgba(5, 14, 21, 0.44);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.mechanism-diff-column > span {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.48rem;
  text-transform: uppercase;
}

.mechanism-diff-column strong {
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.56rem;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mechanism-diff-column.added { border-color: rgba(155, 228, 122, 0.28); }
.mechanism-diff-column.added strong { color: var(--success); }
.mechanism-diff-column.removed { border-color: rgba(248, 81, 73, 0.3); }
.mechanism-diff-column.removed strong { color: var(--error); }
.mechanism-diff-column.retained { border-color: var(--evidence-border); }

.query-preview {
  display: grid;
  gap: 0.16rem;
  margin-top: 0.48rem;
  padding: 0.48rem 0.58rem;
  background: rgba(3, 10, 16, 0.65);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.query-preview span {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.48rem;
  text-transform: uppercase;
}

.query-preview code {
  overflow: hidden;
  color: var(--evidence-primary);
  font-size: 0.58rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mechanism-top3 { display: grid; gap: 0.32rem; }

.mechanism-rank-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.42rem;
  padding: 0.45rem 0.5rem;
  background: rgba(5, 14, 21, 0.45);
  border: 1px solid var(--border);
  border-radius: 7px;
}

.mechanism-rank-row > span { color: var(--text-muted); font-weight: 700; }
.mechanism-rank-row > strong { overflow: hidden; font-size: 0.62rem; text-overflow: ellipsis; white-space: nowrap; }
.mechanism-rank-row > small { color: var(--evidence-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.52rem; }
.mechanism-rank-row.target { border-color: rgba(155, 228, 122, 0.42); }
.mechanism-rank-row.target > span { color: var(--success); }

.score-anatomy {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.68rem;
  background: rgba(7, 16, 24, 0.55);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.score-anatomy-title { display: grid; }
.score-anatomy-title span { color: var(--text-primary); font-size: 0.7rem; font-weight: 650; }
.score-anatomy-title small { color: var(--text-muted); font-size: 0.5rem; }

.score-weight-list {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 0.28rem;
}

.score-weight {
  display: grid;
  min-width: 0;
  padding: 0.32rem 0.38rem;
  background: rgba(5, 14, 21, 0.48);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.score-weight span {
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.45rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.score-weight strong { color: var(--text-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.55rem; }
.score-weight.positive strong { color: var(--success); }
.score-weight.negative strong { color: var(--error); }
.score-weight.tie strong { color: var(--unknown-primary); }

.mechanism-negative {
  overflow: hidden;
  background: var(--unknown-bg);
  border: 1px solid var(--unknown-border);
  border-radius: 9px;
}

.mechanism-negative > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.48rem 0.62rem;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.65rem;
  list-style: none;
}

.mechanism-negative > summary::-webkit-details-marker { display: none; }
.mechanism-negative .drawer-content { padding-top: 0.62rem; }

@media (min-width: 1200px) and (max-height: 820px) {
  #step3 > .card { padding: 0.62rem 0.72rem; }
  #step3 .card-header { margin-bottom: 0.3rem; }
  #step3 .mechanism-context,
  #step3 .mechanism-pipeline,
  #step3 .mechanism-inspector { margin-bottom: 0.38rem; }
  #step3 .mechanism-inspector { min-height: 198px; }
  #step3 .mechanism-explanation,
  #step3 .mechanism-evidence { padding: 0.58rem 0.66rem; }
  #step3 .mechanism-negative { margin-top: 0.38rem; }
}

@media (max-width: 1024px) {
  .mechanism-context {
    grid-template-columns: minmax(0, 1fr) 125px;
  }
  .mechanism-context-message { grid-column: 1 / -1; grid-row: 2; }
  .mechanism-pipeline { overflow-x: auto; padding-bottom: 0.3rem; }
  .mechanism-stage { flex: 0 0 145px; }
  .mechanism-inspector { grid-template-columns: 1fr; }
  .score-anatomy { grid-template-columns: 1fr; }
  .score-weight-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .mechanism-context { grid-template-columns: 1fr; }
  .mechanism-context-message { grid-column: auto; grid-row: auto; }
  .mechanism-contract { grid-template-columns: 1fr; }
  .state-diff-evidence { grid-template-columns: 1fr; }
  .mechanism-diff-column { min-height: 0; }
  .score-weight-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Stage-specific mechanism visuals */
.mechanism-visual {
  min-height: 82px;
  margin-bottom: 0.5rem;
  padding: 0.5rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 30%, rgba(102, 217, 255, 0.08), transparent 60%),
    rgba(4, 12, 18, 0.56);
  border: 1px solid rgba(102, 217, 255, 0.13);
  border-radius: 9px;
}

.mechanism-evidence-data { min-width: 0; }
.visual-empty { display: grid; place-items: center; min-height: 70px; color: var(--text-muted); font-size: 0.65rem; }

.visual-route-map {
  display: grid;
  grid-template-columns: 72px 28px minmax(0, 1fr) 86px;
  align-items: center;
  gap: 0.42rem;
  min-height: 70px;
}

.visual-source-node,
.visual-output-node,
.visual-route-lane,
.visual-state-snapshot,
.question-node {
  display: grid;
  align-content: center;
  min-width: 0;
  padding: 0.4rem 0.48rem;
  background: rgba(13, 27, 39, 0.8);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.visual-source-node span,
.visual-output-node span,
.visual-route-lane span,
.visual-state-snapshot span,
.question-node span,
.funnel-step span {
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.44rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.visual-source-node strong,
.visual-output-node strong,
.visual-route-lane strong,
.visual-state-snapshot strong,
.question-node strong,
.funnel-step strong {
  overflow: hidden;
  color: var(--text-primary);
  font-size: 0.58rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.visual-route-fork {
  position: relative;
  width: 28px;
  height: 54px;
}

.visual-route-fork::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 12px;
  height: 1px;
  background: var(--evidence-primary);
}

.visual-route-fork i {
  position: absolute;
  left: 12px;
  width: 16px;
  height: 50%;
  border-left: 1px solid var(--evidence-border);
}

.visual-route-fork i:first-child { top: 0; border-top: 1px solid var(--evidence-border); border-radius: 6px 0 0; }
.visual-route-fork i:last-child { bottom: 0; border-bottom: 1px solid var(--evidence-border); border-radius: 0 0 0 6px; }

.visual-route-lanes { display: grid; gap: 0.28rem; }
.visual-route-lane { padding-block: 0.28rem; text-align: left; opacity: 0.45; }
.visual-route-lane.active {
  opacity: 1;
  background: linear-gradient(90deg, rgba(64, 151, 255, 0.17), rgba(155, 228, 122, 0.06));
  border-color: var(--evidence-primary);
  box-shadow: inset 3px 0 0 var(--success);
}

.visual-state-flow {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) 22px 82px;
  align-items: center;
  gap: 0.38rem;
  min-height: 70px;
}

.visual-state-delta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.2rem; }
.visual-state-delta span {
  padding: 0.26rem 0.2rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.48rem;
  text-align: center;
}
.visual-state-delta .added { color: var(--success); border-color: rgba(155, 228, 122, 0.28); }
.visual-state-delta .removed { color: var(--error); border-color: rgba(248, 81, 73, 0.28); }
.visual-state-delta .retained { color: var(--evidence-primary); border-color: var(--evidence-border); }
.visual-state-arrow { color: var(--evidence-primary); text-align: center; }
.visual-state-snapshot.after { border-color: var(--evidence-border); }

.visual-recall-funnel {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70px;
}

.funnel-step {
  display: grid;
  place-items: center;
  min-width: 0;
  padding: 0.38rem 0.35rem;
  background: rgba(15, 35, 48, 0.8);
  border: 1px solid var(--evidence-border);
  clip-path: polygon(0 0, 100% 9%, 88% 91%, 12% 100%);
}

.funnel-step.catalog { width: 118px; }
.funnel-step.query { width: 95px; }
.funnel-step.pool { width: 82px; }
.funnel-step.visible { width: 65px; background: rgba(155, 228, 122, 0.11); border-color: rgba(155, 228, 122, 0.4); }
.funnel-arrow { margin: 0 -2px; color: var(--text-muted); font-size: 0.55rem; }

.visual-rank-podium {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 0.38rem;
  min-height: 72px;
}

.podium-item {
  display: grid;
  grid-template-rows: auto auto 1fr;
  width: 30%;
  min-width: 0;
  color: var(--text-secondary);
  text-align: center;
}

.podium-item strong { color: var(--evidence-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.75rem; }
.podium-item span { overflow: hidden; font-size: 0.48rem; text-overflow: ellipsis; white-space: nowrap; }
.podium-item i { align-self: end; height: 26px; margin-top: 0.22rem; background: linear-gradient(to top, rgba(50, 119, 255, 0.42), rgba(102, 217, 255, 0.18)); border: 1px solid var(--evidence-border); border-radius: 5px 5px 0 0; }
.podium-item.rank-1 i { height: 54px; }
.podium-item.rank-2 i { height: 40px; }
.podium-item.rank-3 i { height: 28px; }
.podium-item.target strong { color: var(--success); }
.podium-item.target i { background: linear-gradient(to top, rgba(155, 228, 122, 0.45), rgba(102, 217, 255, 0.18)); border-color: rgba(155, 228, 122, 0.45); }

.visual-question-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  min-height: 70px;
}

.question-node { min-width: 70px; }
.question-node.formula { min-width: 122px; border-color: var(--evidence-border); }
.question-node.selected { min-width: 78px; background: var(--success-bg); border-color: rgba(155, 228, 122, 0.4); }
.question-node.selected strong { color: var(--success); }
.question-gate { display: grid; place-items: center; width: 54px; height: 54px; color: var(--unknown-primary); background: var(--unknown-bg); border: 1px solid var(--unknown-border); transform: rotate(45deg); }
.question-gate span { font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.48rem; transform: rotate(-45deg); }
.question-arrow { color: var(--evidence-primary); }

@media (min-width: 1200px) and (max-height: 820px) {
  #step3 .mechanism-visual { min-height: 72px; margin-bottom: 0.35rem; padding: 0.38rem; }
  #step3 .visual-route-map,
  #step3 .visual-state-flow,
  #step3 .visual-recall-funnel,
  #step3 .visual-rank-podium,
  #step3 .visual-question-flow { min-height: 62px; }
}

@media (max-width: 640px) {
  .mechanism-visual { overflow-x: auto; }
  .visual-route-map,
  .visual-state-flow,
  .visual-recall-funnel,
  .visual-question-flow { min-width: 500px; }
}

/* Prompt Evolution Lab */
.mechanism-mode-tabs {
  display: inline-flex;
  gap: 0.28rem;
  padding: 0.25rem;
  margin-bottom: 0.55rem;
  background: rgba(5, 14, 21, 0.48);
  border: 1px solid var(--border);
  border-radius: 9px;
}

.mechanism-mode {
  min-height: 32px;
  padding: 0.38rem 0.72rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.68rem;
}

.mechanism-mode:hover { color: var(--text-primary); }
.mechanism-mode:focus-visible { outline: 2px solid var(--evidence-primary); outline-offset: 2px; }
.mechanism-mode.active {
  color: var(--text-primary);
  background: linear-gradient(135deg, rgba(50, 119, 255, 0.18), rgba(188, 140, 255, 0.08));
  border-color: var(--evidence-border);
  box-shadow: inset 0 -2px 0 var(--evidence-primary);
}

.prompt-evolution-lab[hidden],
#pipelineMechanismLab[hidden] { display: none !important; }

.prompt-evolution-lab {
  display: grid;
  gap: 0.55rem;
}

.prompt-lab-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0.8rem;
  background: linear-gradient(110deg, rgba(50, 119, 255, 0.11), rgba(188, 140, 255, 0.07));
  border: 1px solid rgba(102, 217, 255, 0.2);
  border-radius: 11px;
}

.prompt-lab-kicker {
  color: var(--demo-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.52rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.prompt-lab-header h3 { margin: 0.1rem 0; font-size: 1.12rem; }
.prompt-lab-header p { color: var(--text-secondary); font-size: 0.66rem; }
.prompt-lab-badges { display: grid; grid-template-columns: repeat(2, auto); gap: 0.3rem; }
.prompt-lab-badges span {
  padding: 0.3rem 0.42rem;
  color: var(--text-secondary);
  background: rgba(5, 14, 21, 0.48);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.48rem;
  white-space: nowrap;
}

.prompt-lab-overview,
.prompt-lab-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 0.55rem;
}

.prompt-chart-card,
.prompt-loop-card,
.prompt-round-detail,
.prompt-sensitivity,
.prompt-simulation {
  min-width: 0;
  padding: 0.62rem 0.7rem;
  background: rgba(11, 23, 34, 0.76);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.prompt-panel-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
}
.prompt-panel-title > span { color: var(--text-primary); font-size: 0.7rem; font-weight: 650; }
.prompt-panel-title > small { color: var(--text-muted); font-size: 0.5rem; }
.prompt-panel-title > button {
  margin-left: auto;
  padding: 0.26rem 0.52rem;
  color: var(--evidence-primary);
  background: var(--evidence-bg);
  border: 1px solid var(--evidence-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.56rem;
}

.prompt-round-chart {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  min-height: 140px;
  padding: 0.3rem 0 1.1rem;
  border-bottom: 1px solid var(--border);
}

.prompt-chart-axis {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-bottom: 0.2rem;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.44rem;
}

.prompt-chart-bars {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.4rem;
  align-items: end;
  background-image: linear-gradient(to top, rgba(132, 188, 218, 0.08) 1px, transparent 1px);
  background-size: 100% 50%;
}

.prompt-round-bars { display: grid; grid-template-rows: 110px auto; gap: 0.2rem; min-width: 0; }
.prompt-round-bars > span { color: var(--text-muted); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.48rem; text-align: center; }
.prompt-bar-pair { display: flex; align-items: flex-end; justify-content: center; gap: 0.18rem; height: 110px; }
.prompt-bar-pair i {
  position: relative;
  width: 24%;
  min-width: 9px;
  border: 1px solid currentColor;
  border-radius: 4px 4px 0 0;
}
.prompt-bar-pair i.train { color: var(--evidence-primary); background: rgba(102, 217, 255, 0.22); }
.prompt-bar-pair i.test { color: var(--success); background: rgba(155, 228, 122, 0.22); }
.prompt-bar-pair b {
  position: absolute;
  top: -13px;
  left: 50%;
  color: currentColor;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.42rem;
  font-style: normal;
  transform: translateX(-50%);
}
.prompt-chart-legend { position: absolute; right: 0; bottom: 0.12rem; display: flex; gap: 0.6rem; }
.prompt-chart-legend span { display: flex; align-items: center; gap: 0.2rem; color: var(--text-muted); font-size: 0.46rem; }
.prompt-chart-legend i { width: 8px; height: 8px; border-radius: 2px; }
.prompt-chart-legend i.train { background: var(--evidence-primary); }
.prompt-chart-legend i.test { background: var(--success); }

.prompt-round-selector { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0.25rem; margin-top: 0.45rem; }
.prompt-round-button,
.prompt-case-button {
  min-width: 0;
  padding: 0.32rem 0.38rem;
  color: var(--text-muted);
  background: rgba(5, 14, 21, 0.5);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.52rem;
}
.prompt-round-button.active,
.prompt-case-button.active { color: var(--text-primary); border-color: var(--evidence-primary); background: var(--evidence-bg); }

.prompt-loop { display: flex; align-items: stretch; gap: 0.18rem; overflow-x: auto; padding-bottom: 0.25rem; }
.prompt-loop > i { display: grid; place-items: center; color: var(--text-muted); font-size: 0.48rem; font-style: normal; }
.prompt-loop-step {
  display: grid;
  flex: 1 0 72px;
  min-height: 54px;
  padding: 0.34rem;
  background: rgba(5, 14, 21, 0.48);
  border: 1px solid var(--border);
  border-radius: 7px;
}
.prompt-loop-step span { color: var(--demo-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.44rem; }
.prompt-loop-step strong { color: var(--text-secondary); font-size: 0.54rem; line-height: 1.2; }

.prompt-guard-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.3rem; margin-top: 0.45rem; }
.prompt-guard-list > div { display: grid; grid-template-columns: 24px 1fr; align-items: center; padding: 0.35rem; background: rgba(5, 14, 21, 0.4); border: 1px solid var(--border); border-radius: 6px; }
.prompt-guard-list span { color: var(--unknown-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.45rem; }
.prompt-guard-list strong { color: var(--text-secondary); font-size: 0.5rem; font-weight: 500; }

.round-score-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.3rem; }
.round-score-grid > div { display: grid; padding: 0.42rem; background: rgba(5, 14, 21, 0.48); border: 1px solid var(--border); border-radius: 7px; }
.round-score-grid span,
.round-confusion span,
.round-change span { color: var(--text-muted); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.45rem; text-transform: uppercase; }
.round-score-grid strong { color: var(--text-primary); font-size: 0.72rem; }
.round-confusion,
.round-change { display: grid; gap: 0.12rem; margin-top: 0.35rem; padding: 0.4rem 0.48rem; background: rgba(5, 14, 21, 0.4); border: 1px solid var(--border); border-radius: 7px; }
.round-confusion strong { color: var(--demo-primary); font-size: 0.55rem; }
.round-change strong { color: var(--evidence-primary); font-size: 0.58rem; }
.round-change small { color: var(--text-muted); font-size: 0.48rem; }

.sensitivity-bars { display: grid; gap: 0.34rem; }
.sensitivity-row { display: grid; grid-template-columns: 112px minmax(0, 1fr) 34px; align-items: center; gap: 0.35rem; }
.sensitivity-row > span { color: var(--text-secondary); font-size: 0.52rem; }
.sensitivity-row > div { height: 9px; overflow: hidden; background: rgba(5, 14, 21, 0.7); border-radius: 999px; }
.sensitivity-row i { display: block; height: 100%; background: var(--evidence-primary); border-radius: inherit; }
.sensitivity-row.highlighted i { background: var(--success); }
.sensitivity-row > strong { color: var(--text-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.52rem; }
.prompt-sensitivity > p { margin-top: 0.45rem; color: var(--text-muted); font-size: 0.5rem; }

.prompt-case-selector { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.3rem; margin-bottom: 0.45rem; }
.prompt-case-button { display: flex; justify-content: space-between; gap: 0.25rem; text-align: left; }
.prompt-case-button strong { overflow: hidden; font-size: 0.5rem; text-overflow: ellipsis; white-space: nowrap; }
.prompt-case-button span { color: var(--text-muted); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.44rem; text-transform: uppercase; }
.prompt-simulation-label { margin-bottom: 0.35rem; color: var(--unknown-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.46rem; text-transform: uppercase; }
.prompt-sim-steps { display: flex; align-items: stretch; gap: 0.2rem; overflow-x: auto; padding-bottom: 0.28rem; }
.prompt-sim-steps > i { display: grid; place-items: center; color: var(--text-muted); font-size: 0.5rem; font-style: normal; }
.prompt-sim-step {
  display: grid;
  flex: 1 0 145px;
  min-height: 82px;
  padding: 0.42rem 0.48rem;
  background: rgba(5, 14, 21, 0.48);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}
.prompt-sim-step > span { color: var(--demo-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.44rem; }
.prompt-sim-step > strong { color: var(--text-primary); font-size: 0.58rem; }
.prompt-sim-step > p { color: var(--text-secondary); font-size: 0.5rem; line-height: 1.25; }
.prompt-sim-step.active { border-color: var(--evidence-primary); background: var(--evidence-bg); transform: translateY(-2px); }
.prompt-sim-step.complete { border-color: rgba(155, 228, 122, 0.34); box-shadow: inset 0 -2px 0 var(--success); }

.prompt-lab-footer { display: flex; justify-content: space-between; gap: 1rem; padding: 0.45rem 0.6rem; color: var(--text-muted); background: rgba(5, 14, 21, 0.4); border: 1px solid var(--border); border-radius: 8px; font-size: 0.5rem; }
.prompt-lab-footer a { color: var(--evidence-primary); text-decoration: none; }

@media (min-width: 1200px) and (max-height: 820px) {
  #step3.prompt-mode .prompt-evolution-lab { gap: 0.38rem; }
  #step3.prompt-mode .prompt-lab-header { padding: 0.45rem 0.62rem; }
  #step3.prompt-mode .prompt-round-chart { min-height: 114px; }
  #step3.prompt-mode .prompt-round-bars { grid-template-rows: 86px auto; }
  #step3.prompt-mode .prompt-bar-pair { height: 86px; }
  #step3.prompt-mode .prompt-sim-step { min-height: 70px; }
}

@media (max-width: 900px) {
  .prompt-lab-header,
  .prompt-lab-overview,
  .prompt-lab-detail { grid-template-columns: 1fr; }
  .prompt-lab-badges { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .prompt-case-selector { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .prompt-lab-badges,
  .prompt-guard-list,
  .round-score-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .prompt-round-selector { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .prompt-round-chart { overflow-x: auto; }
  .prompt-chart-bars { min-width: 520px; }
  .prompt-lab-footer { display: grid; }
}

/* ===================================================================
   Editorial Social Commerce — visual alignment with the V3 film

   This is deliberately a theme-only layer. It changes no content,
   information architecture, data binding, or interaction behavior.
   =================================================================== */

:root {
  --bg-primary: #f3ecdf;
  --bg-secondary: rgba(248, 242, 229, 0.94);
  --bg-tertiary: #eee4d4;
  --bg-card: rgba(250, 246, 237, 0.94);
  --border: rgba(74, 49, 41, 0.18);
  --border-light: rgba(74, 49, 41, 0.40);

  --text-primary: #201a18;
  --text-secondary: #5f544e;
  --text-muted: #81736a;

  --evidence-primary: #8d1831;
  --evidence-secondary: #201a18;
  --evidence-bg: rgba(141, 24, 49, 0.075);
  --evidence-border: rgba(141, 24, 49, 0.32);

  --demo-primary: #009b96;
  --demo-secondary: #fe2c55;
  --demo-bg: rgba(0, 155, 150, 0.075);
  --demo-border: rgba(0, 155, 150, 0.30);

  --unknown-primary: #9b651d;
  --unknown-bg: rgba(155, 101, 29, 0.08);
  --unknown-border: rgba(155, 101, 29, 0.30);

  --success: #167a67;
  --success-bg: rgba(22, 122, 103, 0.08);
  --error: #b4233a;
  --error-bg: rgba(180, 35, 58, 0.07);
  --metric-highlight: #8d1831;

  --card-radius: 3px;
  --small-radius: 2px;
  --transition-fast: 180ms cubic-bezier(0.2, 0.75, 0.2, 1);
  --transition-normal: 360ms cubic-bezier(0.2, 0.75, 0.2, 1);
}

body {
  font-family: 'Avenir Next', Avenir, 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
}

body::before {
  background:
    radial-gradient(circle at 88% 8%, rgba(141, 24, 49, 0.115), transparent 32rem),
    radial-gradient(circle at 8% 86%, rgba(0, 155, 150, 0.055), transparent 28rem),
    linear-gradient(105deg, #f7f0e3 0%, #f3ecdf 52%, #eee4d7 100%);
}

body::after {
  opacity: 0.34;
  background-image:
    repeating-linear-gradient(0deg, rgba(74, 49, 41, 0.018) 0 1px, transparent 1px 4px),
    linear-gradient(90deg, rgba(141, 24, 49, 0.022) 1px, transparent 1px);
  background-size: auto, 96px 100%;
  mask-image: none;
}

::selection {
  color: #fffaf0;
  background: #8d1831;
}

.topbar {
  min-height: 50px;
  padding-block: 0.62rem;
  color: var(--text-primary);
  background: rgba(248, 242, 229, 0.88);
  border-color: var(--border);
  backdrop-filter: blur(18px) saturate(0.9);
}

.topbar .brand {
  font-family: 'Avenir Next', Avenir, sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.topbar .brand .dot {
  width: 7px;
  height: 7px;
  margin-right: 8px;
  background: #25f4ee;
  border-radius: 0;
  box-shadow: 3px 3px 0 #fe2c55;
}

.topbar .sub,
.topbar-status,
.topbar-nav a,
.tour-progress .step-indicator {
  font-family: 'SFMono-Regular', 'JetBrains Mono', Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar .sub { color: var(--text-muted); }

.topbar-status {
  padding: 0.25rem 0.55rem;
  color: #fffaf0;
  background: #201a18;
  border: 0;
  border-left: 3px solid #25f4ee;
  border-radius: 0;
  box-shadow: 3px 3px 0 #fe2c55;
}

.topbar-nav a,
.topbar-nav button {
  border-radius: 0;
}

.language-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 28px;
  margin-left: 0.35rem;
  padding: 0.22rem 0.48rem !important;
  color: var(--text-muted) !important;
  background: transparent !important;
  border: 1px solid var(--border-light) !important;
  box-shadow: none !important;
  font-family: 'SFMono-Regular', 'JetBrains Mono', Consolas, monospace;
  font-size: 0.58rem !important;
  letter-spacing: 0.06em !important;
}

.language-toggle i {
  color: var(--border-light);
  font-style: normal;
}

.language-toggle span {
  position: relative;
  transition: color var(--transition-fast);
}

.language-toggle span.active {
  color: var(--text-primary);
  font-weight: 700;
}

.language-toggle span.active::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: -4px;
  left: 0;
  height: 1px;
  background: var(--evidence-primary);
}

.language-toggle:hover {
  color: var(--text-primary) !important;
  border-color: var(--evidence-primary) !important;
}

.topbar-nav a:hover,
.topbar-nav button:hover {
  color: var(--text-primary);
  background: transparent;
  box-shadow: inset 0 -1px 0 var(--evidence-primary);
}

.tour-progress {
  padding-block: 0.62rem;
  background: rgba(243, 236, 223, 0.92);
  border-color: var(--border);
}

.tour-progress .step-indicator {
  border-radius: 0;
  font-size: 0.63rem;
}

.tour-progress .step-indicator:hover {
  color: var(--text-primary);
  background: rgba(141, 24, 49, 0.04);
}

.tour-progress .step-indicator.active {
  color: #fffaf0;
  background: #201a18;
  border-color: #201a18;
  box-shadow: inset 3px 0 0 #25f4ee, inset -3px 0 0 #fe2c55;
}

.step-connector { background: var(--border); }

.tour-content {
  max-width: 1400px;
  padding-top: clamp(1rem, 2.4vw, 2rem);
}

.card,
.hero {
  position: relative;
  overflow: hidden;
  background: rgba(250, 246, 237, 0.90);
  border: 1px solid var(--border);
  border-radius: 3px;
  box-shadow: 0 18px 55px rgba(74, 49, 41, 0.055);
}

.card::before,
.hero::before,
#step5 .card::before {
  content: '';
  position: absolute;
  z-index: 0;
  top: 0;
  right: auto;
  bottom: auto;
  left: clamp(1rem, 2vw, 1.6rem);
  width: 58px;
  height: 2px;
  background: var(--evidence-primary);
  opacity: 1;
}

.card > *,
.hero > * { position: relative; z-index: 1; }

.card-header {
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.card-title,
.hero h1,
.closeout-quote,
.prompt-lab-header h3 {
  font-family: 'Didot', 'Bodoni 72', 'Iowan Old Style', Georgia, serif;
}

.card-title {
  font-size: clamp(1.35rem, 2.2vw, 1.78rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1;
}

.card-subtitle {
  margin-top: 0.38rem;
  font-family: 'SFMono-Regular', 'JetBrains Mono', Consolas, monospace;
  font-size: 0.57rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
}

.evidence-badge {
  border-radius: 0;
  font-family: 'SFMono-Regular', 'JetBrains Mono', Consolas, monospace;
  font-size: 0.56rem;
  letter-spacing: 0.11em;
}

.evidence-badge.competition {
  color: var(--evidence-primary);
  background: transparent;
  border-color: var(--evidence-border);
}

.evidence-badge.demo-only {
  color: #fffaf0;
  background: #201a18;
  border: 0;
  border-left: 3px solid #25f4ee;
  box-shadow: 3px 3px 0 #fe2c55;
}

.hero {
  min-height: calc(100vh - 145px);
  padding: clamp(2rem, 6vw, 5rem) clamp(1.25rem, 5vw, 4.5rem) 1.5rem;
  background:
    linear-gradient(90deg, rgba(250, 246, 237, 0.98), rgba(250, 246, 237, 0.86)),
    radial-gradient(circle at 82% 36%, rgba(141, 24, 49, 0.10), transparent 28rem);
}

.hero-grid { max-width: 1210px; }

.hero-orbit {
  position: absolute;
  border-color: rgba(141, 24, 49, 0.10);
}

.hero-orbit::before,
.hero-orbit::after {
  border-color: rgba(141, 24, 49, 0.075);
}

.hero-orbit::after {
  background: radial-gradient(circle, rgba(0, 155, 150, 0.055), transparent 64%);
}

.hero-kicker {
  color: var(--text-primary);
  font-family: 'SFMono-Regular', 'JetBrains Mono', Consolas, monospace;
  letter-spacing: 0.18em;
}

.hero-kicker::before {
  content: '';
  width: 58px;
  height: 2px;
  background: var(--evidence-primary);
}

.hero-kicker::after { display: none; }
.hero-kicker span { color: var(--evidence-primary); }

.hero h1 {
  color: var(--text-primary);
  font-size: clamp(4.4rem, 8vw, 7.7rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.78;
}

.hero h1 span {
  color: var(--evidence-primary);
  font-style: italic;
  font-weight: 400;
  margin-left: 0.04em;
}

.hero .subtitle {
  max-width: 620px;
  padding-left: 1.25rem;
  border-left: 2px solid var(--evidence-primary);
  color: var(--text-secondary);
  font-family: 'Iowan Old Style', Georgia, serif;
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  font-style: italic;
  line-height: 1.35;
}

.btn-primary,
.btn-secondary,
.replay-controls button,
.mechanism-mode,
.prompt-panel-title > button {
  border-radius: 0;
}

.btn-primary {
  color: #fffaf0;
  background: #201a18;
  border: 1px solid #201a18;
  box-shadow: 4px 4px 0 var(--evidence-primary);
}

.btn-primary:hover {
  color: #fffaf0;
  background: var(--evidence-primary);
  border-color: var(--evidence-primary);
  box-shadow: 4px 4px 0 #201a18;
  transform: translate(-1px, -1px);
}

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

.btn-secondary:hover {
  background: rgba(141, 24, 49, 0.045);
  border-color: var(--evidence-primary);
}

.hero-proofline {
  border-color: var(--border);
  color: var(--text-muted);
  font-family: 'SFMono-Regular', 'JetBrains Mono', Consolas, monospace;
}

.hero-proofline span::before {
  background: var(--demo-primary);
  border-radius: 0;
  box-shadow: 2px 2px 0 var(--demo-secondary);
}

.hero-scorecard,
.turn-timeline,
.state-panel,
.results-panel,
.mechanism-inspector,
.prompt-evolution-lab,
.auction-result {
  --bg-primary: #111514;
  --bg-secondary: #151a19;
  --bg-tertiary: #1b211f;
  --bg-card: rgba(22, 28, 26, 0.96);
  --border: rgba(235, 225, 207, 0.14);
  --border-light: rgba(235, 225, 207, 0.32);
  --text-primary: #fffaf0;
  --text-secondary: #c9c0b2;
  --text-muted: #8f877c;
  --evidence-primary: #25d9d3;
  --evidence-secondary: #25f4ee;
  --evidence-bg: rgba(37, 244, 238, 0.075);
  --evidence-border: rgba(37, 244, 238, 0.28);
  --demo-primary: #fe2c55;
  --demo-bg: rgba(254, 44, 85, 0.08);
  --demo-border: rgba(254, 44, 85, 0.28);
  --success: #56d7a8;
  --success-bg: rgba(86, 215, 168, 0.08);
  --error: #ff6b7a;
  color: var(--text-primary);
}

.hero-scorecard {
  background:
    radial-gradient(circle at 86% 10%, rgba(37, 244, 238, 0.09), transparent 15rem),
    #111514;
  border: 1px solid rgba(32, 26, 24, 0.85);
  border-radius: 2px;
  box-shadow: 7px 7px 0 var(--evidence-primary), 11px 11px 0 #fe2c55;
}

.hero-scorecard::before {
  background: linear-gradient(180deg, #25f4ee 0 50%, #fe2c55 50% 100%);
}

.hero-scorecard::after {
  border-color: rgba(37, 244, 238, 0.14);
}

.hero .metric-big .value {
  color: var(--text-primary);
  text-shadow: none;
}

.scorecard-signal span {
  background: rgba(37, 244, 238, 0.24);
  border-radius: 0;
}

.scorecard-signal span:nth-child(8) {
  background: linear-gradient(to top, #fe2c55, #25f4ee);
}

.hero .footer-note {
  color: var(--text-muted);
  border-color: var(--border);
}

.contract-item,
.catalog-sample,
.eval-metric,
.campaign-card,
.reproduce-drawer,
.closeout-link {
  background: rgba(246, 239, 225, 0.72);
  border-color: var(--border);
  border-radius: 2px;
  box-shadow: none;
}

.contract-item .icon {
  color: var(--evidence-primary);
  background: transparent;
  border-color: var(--evidence-border);
  border-radius: 0;
}

.catalog-sample::after {
  border-color: rgba(141, 24, 49, 0.12);
}

.scenario-bar {
  border-color: var(--border);
  border-radius: 0;
  box-shadow: none;
}

.scenario-bar .segment:nth-child(1) { background: #8d1831 !important; }
.scenario-bar .segment:nth-child(2) { background: #009b96 !important; }
.scenario-bar .segment:nth-child(3) { background: #b97828 !important; }
.scenario-bar .segment:nth-child(4) { background: #5f544e !important; }

.scenario-tabs,
.mechanism-mode-tabs {
  padding: 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
}

.scenario-tab,
.mechanism-mode {
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
}

.scenario-tab.active,
.mechanism-mode.active {
  color: #fffaf0;
  background: #201a18;
  border-color: #201a18;
  box-shadow: inset 3px 0 0 #25f4ee, inset -3px 0 0 #fe2c55;
}

.case-choice,
.override-summary-card,
.replay-header {
  color: var(--text-secondary);
  background: rgba(246, 239, 225, 0.68);
  border-color: var(--border);
  border-radius: 2px;
}

.case-choice.active {
  background: rgba(141, 24, 49, 0.055);
  border-color: var(--evidence-primary);
  box-shadow: inset 3px 0 0 var(--evidence-primary);
}

.case-choice::after {
  height: 1px;
  background: var(--evidence-primary);
}

.turn-timeline,
.state-panel,
.results-panel {
  background: #111514;
  border-color: rgba(235, 225, 207, 0.12);
  border-radius: 2px;
}

.turn-card,
.state-section,
.result-item {
  background: rgba(255, 250, 240, 0.035);
  border-color: var(--border);
  border-radius: 1px;
  box-shadow: none;
}

.turn-card.active {
  background: rgba(37, 244, 238, 0.06);
  box-shadow: inset 2px 0 0 #25f4ee;
}

.result-item.is-target {
  background: rgba(86, 215, 168, 0.08);
  box-shadow: inset 2px 0 0 var(--success);
}

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

.replay-controls button:hover,
.replay-controls button.active-control {
  color: #fffaf0;
  background: #201a18;
  border-color: #201a18;
}

.mechanism-stage,
.mechanism-context > div,
.mechanism-explanation,
.mechanism-evidence,
.mechanism-contract > div,
.mechanism-diff-column,
.mechanism-rank-row,
.score-weight,
.mechanism-negative,
.score-anatomy {
  border-radius: 1px;
}

.mechanism-stage.active {
  box-shadow: inset 0 -2px 0 var(--evidence-primary);
}

.mechanism-inspector {
  padding: 0.7rem;
  background: #111514;
  border: 1px solid rgba(235, 225, 207, 0.12);
  border-radius: 2px;
}

.mechanism-explanation,
.mechanism-evidence {
  background: rgba(255, 250, 240, 0.025);
  border-color: var(--border);
}

.prompt-evolution-lab {
  padding: 0.7rem;
  background: #111514;
  border: 1px solid rgba(235, 225, 207, 0.12);
  border-radius: 2px;
}

.prompt-lab-header {
  background: linear-gradient(110deg, rgba(37, 244, 238, 0.07), rgba(254, 44, 85, 0.045));
  border-color: var(--border);
  border-radius: 1px;
}

.prompt-lab-header h3 {
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.prompt-chart-card,
.prompt-loop-card,
.prompt-round-detail,
.prompt-sensitivity,
.prompt-simulation,
.prompt-lab-footer,
.prompt-lab-badges span,
.prompt-round-button,
.prompt-case-button,
.prompt-loop-step,
.prompt-guard-list > div,
.round-score-grid > div,
.round-confusion,
.round-change,
.prompt-sim-step {
  border-radius: 1px;
}

.prompt-bar-pair i,
.prompt-chart-legend i,
.sensitivity-row > div,
.sensitivity-row i { border-radius: 0; }

.eval-metric .value { color: var(--evidence-primary); }

.version-table {
  border-color: var(--border);
  border-radius: 1px;
}

.version-table th {
  color: var(--text-muted);
  background: rgba(74, 49, 41, 0.045);
}

.version-table tr.current td {
  color: var(--text-primary);
  background: rgba(141, 24, 49, 0.07);
  border-bottom-color: rgba(141, 24, 49, 0.18);
}

.reproduce-drawer pre {
  color: #fffaf0;
  background: #111514;
  border-color: #111514;
  border-radius: 1px;
}

#step5 .card {
  background: rgba(250, 246, 237, 0.92);
}

.demo-banner {
  color: var(--text-primary);
  background: rgba(0, 155, 150, 0.055);
  border-color: var(--demo-border);
  border-radius: 1px;
  box-shadow: inset 3px 0 0 #25b9b4, inset -3px 0 0 #fe2c55;
}

.auction-result {
  color: #fffaf0;
  background: #111514;
  border-color: #111514;
  border-radius: 1px;
}

.closeout-link:hover {
  background: rgba(141, 24, 49, 0.055);
  border-color: var(--evidence-primary);
  box-shadow: 4px 4px 0 rgba(141, 24, 49, 0.16);
}

.closeout-quote {
  color: var(--text-primary);
  background: transparent;
  border-color: var(--border);
  border-left-color: var(--evidence-primary);
  border-radius: 0;
  font-size: 1.25rem;
  font-style: italic;
}

.tour-nav {
  border-color: var(--border);
}

@media (max-width: 720px) {
  .hero {
    min-height: auto;
    padding-top: 2.6rem;
  }

  .hero h1 {
    font-size: clamp(3.6rem, 19vw, 5.2rem);
  }

  .hero-scorecard {
    box-shadow: 4px 4px 0 var(--evidence-primary), 7px 7px 0 #fe2c55;
  }

  .topbar .sub { display: none; }
  .language-toggle { margin-left: 0.1rem; }
}

/* ===================================================================
   Evidence readability + Scheme B Prompt Lab
   WCAG 2.2 AA: every dark-plate text token is >= 4.5:1 on --dark-plate.
   =================================================================== */

:root {
  --dark-plate: #111514;
  --dark-plate-raised: #2e3536;
  --dark-text-primary: #fffaf0;
  --dark-text-secondary: #e3dbce;
  --dark-text-muted: #c2b8aa;
  --dark-accent-cyan: #6ceee8;
  --dark-accent-coral: #ffb3c1;
  --dark-success: #7de2bd;
  --dark-warning: #ffd18a;
  --text-muted: #6b5e56;
  --unknown-primary: #7d4d0c;
}

#step2 .rank-journey,
#step2 .turn-timeline,
#step2 .state-panel,
#step2 .results-panel,
#step3 .mechanism-context,
#step3 .mechanism-pipeline,
#step3 .mechanism-inspector,
#step3 .score-anatomy,
#step3 .prompt-evolution-lab {
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --text-muted: var(--dark-text-muted);
  --evidence-primary: var(--dark-accent-cyan);
  --evidence-secondary: var(--dark-accent-cyan);
  --evidence-bg: rgba(108, 238, 232, 0.10);
  --evidence-border: rgba(108, 238, 232, 0.46);
  --demo-primary: var(--dark-accent-coral);
  --demo-bg: rgba(255, 179, 193, 0.10);
  --demo-border: rgba(255, 179, 193, 0.42);
  --success: var(--dark-success);
  --success-bg: rgba(125, 226, 189, 0.10);
  --error: #ff9fac;
  --unknown-primary: var(--dark-warning);
  color: var(--dark-text-primary);
}

#step2 .rank-journey {
  background: var(--dark-plate);
  border-color: #566062;
}

#step2 .rank-journey-target > span,
#step2 .rank-journey-target em,
#step2 .rank-node .rank-turn,
#step2 .rank-node small,
#step2 .rank-arrow {
  color: var(--dark-text-secondary);
}

#step2 .rank-journey-target strong,
#step2 .rank-node strong { color: var(--dark-text-primary); }

#step2 .rank-node {
  background: var(--dark-plate-raised);
  border-color: #667174;
}

#step2 .rank-node.preview { border-color: var(--dark-accent-coral); }
#step2 .rank-node.preview strong { color: var(--dark-accent-coral); }
#step2 .rank-node.hit { border-color: var(--dark-success); }
#step2 .rank-node.hit strong { color: var(--dark-success); }
#step2 .rank-node.active {
  background: #243c3d;
  box-shadow: 0 0 0 1px var(--dark-accent-cyan);
}

#step2 .turn-timeline,
#step2 .state-panel,
#step2 .results-panel { background: var(--dark-plate); }

#step2 .turn-card,
#step2 .state-section,
#step2 .result-item {
  color: var(--dark-text-primary);
  background: #1d2322;
  border-color: #4c5657;
}

#step2 .turn-card .turn-number,
#step2 .turn-card .agent-msg,
#step2 .state-section h4,
#step2 .results-heading,
#step2 .result-item .asin { color: var(--dark-text-muted); }

#step2 .turn-card .user-msg,
#step2 .result-item .title { color: var(--dark-text-primary); }

#step3 .mechanism-context > div,
#step3 .mechanism-stage,
#step3 .score-anatomy,
#step3 .score-weight {
  background: var(--dark-plate-raised);
  border-color: #667174;
}

#step3 .mechanism-context span,
#step3 .mechanism-stage > small,
#step3 .score-anatomy-title small,
#step3 .score-weight span { color: var(--dark-text-secondary); }

#step3 .mechanism-pipeline > i { color: #5c4d46; }

#step3 .mechanism-context strong,
#step3 .mechanism-stage > strong,
#step3 .score-anatomy-title span,
#step3 .score-weight strong { color: var(--dark-text-primary); }

#step3 .mechanism-stage > span { color: var(--dark-accent-coral); }
#step3 .mechanism-stage.active {
  color: var(--dark-text-primary);
  background: #17383a;
  border-color: var(--dark-accent-cyan);
  box-shadow: inset 0 -2px 0 var(--dark-success);
}

#step3 .mechanism-context-rank.hit strong,
#step3 .score-weight.positive strong { color: var(--dark-success); }
#step3 .mechanism-context-rank.preview strong { color: var(--dark-accent-coral); }
#step3 .score-weight.negative strong { color: #ff9fac; }
#step3 .score-weight.tie strong { color: var(--dark-warning); }

#step3 .mechanism-inspector,
#step3 .mechanism-explanation,
#step3 .mechanism-evidence {
  background: var(--dark-plate);
  border-color: #4c5657;
}

/* Scheme B score summary */
.prompt-score-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) auto minmax(0, 0.85fr) minmax(0, 0.9fr) minmax(260px, 1.2fr);
  align-items: stretch;
  gap: 0.45rem;
}

.scheme-score-version,
.scheme-score-lift,
.scheme-score-gates {
  display: grid;
  align-content: center;
  gap: 0.12rem;
  min-width: 0;
  padding: 0.62rem 0.72rem;
  background: #1d2322;
  border: 1px solid #4c5657;
}

.scheme-score-version span,
.scheme-score-lift span {
  color: var(--dark-text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.scheme-score-version strong,
.scheme-score-lift strong {
  color: var(--dark-text-primary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 1.15rem;
  font-weight: 650;
}

.scheme-score-version.after {
  border-color: var(--dark-success);
  box-shadow: inset 3px 0 0 var(--dark-success);
}

.scheme-score-version.after strong,
.scheme-score-lift strong { color: var(--dark-success); }
.scheme-score-lift small { color: var(--dark-text-secondary); font-size: 0.52rem; }
.scheme-score-arrow { display: grid; place-items: center; color: var(--dark-accent-cyan); }
.scheme-score-gates { gap: 0.25rem; }
.scheme-score-gates span {
  padding: 0.22rem 0.3rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.46rem;
  letter-spacing: 0.035em;
}
.scheme-score-gates .accepted { color: var(--dark-success); border-left: 2px solid var(--dark-success); }
.scheme-score-gates .untouched { color: var(--dark-warning); border-left: 2px solid var(--dark-warning); }

.prompt-scheme-overview { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }
.prompt-metric-comparison { display: grid; gap: 0.3rem; }
.scheme-metric-row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) 42px;
  align-items: center;
  gap: 0.42rem;
}
.scheme-metric-row > span { color: var(--dark-text-secondary); font-size: 0.52rem; }
.scheme-metric-row > strong { color: var(--dark-text-primary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.5rem; text-align: right; }
.scheme-metric-bars { position: relative; display: grid; gap: 2px; }
.scheme-metric-bars i { display: block; height: 5px; min-width: 2px; border-radius: 0; }
.scheme-metric-bars .before { background: #788185; }
.scheme-metric-bars .after { background: var(--dark-success); }

.prompt-metric-table {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.3rem;
  margin-top: 0.48rem;
}
.prompt-metric-table > div { display: grid; gap: 0.08rem; padding: 0.38rem; background: #1d2322; border: 1px solid #4c5657; }
.prompt-metric-table span { color: var(--dark-text-muted); font-size: 0.44rem; }
.prompt-metric-table small { color: var(--dark-text-secondary); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.42rem; }
.prompt-metric-table strong { color: var(--dark-success); font-size: 0.56rem; }

.prompt-gate-flow { display: flex; align-items: stretch; gap: 0.18rem; overflow-x: auto; padding-bottom: 0.25rem; }
.prompt-gate-flow > i { display: grid; place-items: center; color: var(--dark-text-muted); font-style: normal; }
.prompt-gate-step { display: grid; align-content: start; flex: 1 0 92px; gap: 0.12rem; padding: 0.38rem; background: #1d2322; border: 1px solid #4c5657; }
.prompt-gate-step > span { color: var(--dark-accent-coral); font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.44rem; }
.prompt-gate-step > strong { color: var(--dark-text-primary); font-size: 0.52rem; line-height: 1.2; }
.prompt-gate-step > small { color: var(--dark-text-secondary); font-size: 0.43rem; line-height: 1.2; }

.prompt-contract-panel {
  padding: 0.62rem 0.7rem;
  background: #111514;
  border: 1px solid #4c5657;
}
.prompt-contract-diff { display: grid; }
.contract-diff-head,
.contract-diff-row {
  display: grid;
  grid-template-columns: minmax(130px, 0.7fr) minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 0.55rem;
  padding: 0.38rem 0.45rem;
  border-bottom: 1px solid #394143;
}
.contract-diff-head {
  color: var(--dark-text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.46rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.contract-diff-row:last-child { border-bottom: 0; }
.contract-diff-row strong { color: var(--dark-text-primary); font-size: 0.53rem; }
.contract-diff-row p { margin: 0; color: var(--dark-text-secondary); font-size: 0.49rem; line-height: 1.3; }
.contract-diff-row p:last-child { color: var(--dark-success); }

.prompt-case-selector { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 1024px) {
  .prompt-score-hero { grid-template-columns: 1fr auto 1fr; }
  .scheme-score-lift { grid-column: 1 / 2; }
  .scheme-score-gates { grid-column: 2 / 4; }
  .prompt-scheme-overview { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .prompt-score-hero { grid-template-columns: 1fr; }
  .scheme-score-arrow { transform: rotate(90deg); }
  .scheme-score-lift,
  .scheme-score-gates { grid-column: auto; }
  .prompt-metric-table { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contract-diff-head { display: none; }
  .contract-diff-row { grid-template-columns: 1fr; }
  .prompt-case-selector { grid-template-columns: 1fr; }
}
/* V3 film: direct, playable Cloudflare-hosted deliverable. */
.hero-film {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(420px, 1.28fr);
  gap: clamp(1.2rem, 3vw, 2.8rem);
  align-items: center;
  margin-top: 2.1rem;
  padding: clamp(1rem, 2vw, 1.5rem);
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(37, 244, 238, 0.06), transparent 38%),
    linear-gradient(315deg, rgba(254, 44, 85, 0.06), transparent 34%),
    var(--bg-card);
}

.hero-film-copy { max-width: 31rem; }

.hero-film-kicker {
  color: var(--success);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.hero-film h2 {
  margin: 0.55rem 0 0.7rem;
  font-size: clamp(1.75rem, 3vw, 2.8rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.hero-film p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.58;
}

.hero-film-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-top: 1rem;
}

.hero-film-links a {
  color: var(--text-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  text-decoration-color: var(--success);
  text-underline-offset: 0.25rem;
}

.hero-film video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #0d0f10;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

@media (max-width: 900px) {
  .hero-film { grid-template-columns: 1fr; }
  .hero-film-copy { max-width: none; }
}

/* Compact-height language access: the bilingual control remains independent
   from the top bar, which the 1280×720 recording layout intentionally hides. */
.language-toggle {
  position: fixed;
  top: 0.7rem;
  right: 0.8rem;
  z-index: 200;
  margin: 0;
  color: #fffaf0 !important;
  background: rgba(17, 21, 20, 0.9) !important;
  border-color: rgba(255, 250, 240, 0.45) !important;
  backdrop-filter: blur(12px);
}

.language-toggle span.active { color: #ffffff; }

.topbar-nav { margin-right: 4.9rem; }

@media (max-width: 720px) {
  .language-toggle {
    top: 0.55rem;
    right: 0.55rem;
  }
}