/**
 * AI Tuner v5 — Visual language
 * Canon: AI Tuner v4.0 web (`/style.css` + `/style-v3.0.css` at repo root).
 * v5 pages default to dark (`body.aituner-dark`); light = v4 default body.
 */

/* --- Design tokens (v4.0 aesthetic canon) --- */
:root {
    /* v4 body.dark-mode */
    --at-page-bg: #000000;
    --at-surface: #1a1a1a;
    --at-surface-raised: #1a1a1a;
    --at-text: #ffffff;
    --at-text-secondary: #999999;
    --at-text-label: #ffffff;
    --at-border: #ffffff;
    --at-border-soft: #333333;
    --at-border-muted: #555555;
    --at-accent: #ffffff;
    --at-accent-ink: #000000;
    --at-heading: #ffffff;
    --at-muted: #cccccc;
    --at-hover-surface: #333333;
    --at-hover-primary: #cccccc;
    --at-card-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
    --at-quick-start-bg: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%);
    --at-toast-bg: #ffffff;
    --at-toast-fg: #000000;
    --vl-font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --vl-font-size-base: 16px;
    --vl-font-size-subtitle: 1.1rem;
    --vl-font-size-body: 0.95rem;
    --vl-font-weight-display: 300;
    --vl-font-weight-heading: 500;
    --vl-font-weight-label: 500;
    --vl-font-weight-control: 500;
    --vl-font-weight-emphasis: 600;
    --vl-letter-spacing-display: -0.02em;
    --vl-letter-spacing-subtitle: 0.01em;
    --vl-radius-tight: 4px;
    --vl-radius: 8px;
    --vl-radius-control: 6px;
    --vl-border-width: 2px;
    --vl-border-width-feature: 3px;
    --vl-transition: 0.2s ease;
    --vl-container-max: 1400px;
    --vl-container-wide: 1500px;
}

/** v4 default body (light) — `body.aituner-light` */
body.aituner-light {
    --at-page-bg: #ffffff;
    --at-surface: #ffffff;
    --at-surface-raised: #fafafa;
    --at-text: #000000;
    --at-text-secondary: #666666;
    --at-text-label: #333333;
    --at-border: #000000;
    --at-border-soft: #e0e0e0;
    --at-border-muted: #333333;
    --at-accent: #000000;
    --at-accent-ink: #ffffff;
    --at-heading: #000000;
    --at-muted: #666666;
    --at-hover-surface: #000000;
    --at-hover-primary: #333333;
    --at-card-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --at-quick-start-bg: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    --at-toast-bg: #000000;
    --at-toast-fg: #ffffff;
}

/* --- Global reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* --- Base (v4 body) --- */
body {
    font-family: var(--vl-font-family);
    background-color: var(--at-page-bg) !important;
    color: var(--at-text) !important;
    font-size: var(--vl-font-size-base);
    line-height: 1.6;
}

body.aituner-dark {
    background-color: var(--at-page-bg) !important;
    color: var(--at-text) !important;
}

.aituner-chart-fallback {
    padding: 16px;
    max-width: 36rem;
    margin: 0 auto;
    font-size: 15px;
    line-height: 1.5;
    border-radius: var(--vl-radius) !important;
    border: 2px solid var(--at-border) !important;
    background: var(--at-surface) !important;
    color: var(--at-text) !important;
}

.primary-btn:disabled,
.nav-btn:disabled {
    opacity: 0.45 !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
}

/* --- Typography (v4 h1 / .subtitle / .category-group h2) --- */
.hero h1,
.aituner-brand,
.landing-brand {
    font-size: 3rem !important;
    font-weight: var(--vl-font-weight-display) !important;
    letter-spacing: var(--vl-letter-spacing-display) !important;
    color: var(--at-heading) !important;
    line-height: 1.15 !important;
    margin-bottom: 10px;
}

.aituner-demystifier,
.landing-demystifier {
    font-size: clamp(1rem, 2.8vw, 1.2rem);
    font-weight: var(--vl-font-weight-emphasis);
    color: var(--at-text);
    margin-bottom: 0.35rem;
    letter-spacing: 0.02em;
}

.hero p,
.aituner-tagline,
.landing-tagline,
.decoder-view-sub {
    font-size: var(--vl-font-size-subtitle) !important;
    font-weight: 400 !important;
    color: var(--at-text-secondary) !important;
    letter-spacing: var(--vl-letter-spacing-subtitle) !important;
    line-height: 1.6 !important;
}

.hero p {
    max-width: 36rem !important;
    margin-inline: auto !important;
}

.screen-content h1,
.decoder-view-header h1 {
    font-size: 1.3rem !important;
    font-weight: var(--vl-font-weight-heading) !important;
    letter-spacing: -0.01em !important;
    color: var(--at-heading) !important;
}

.narrative-label {
    color: var(--at-muted) !important;
    letter-spacing: 0.06em !important;
}

.narrative-body,
.reveal-body,
.promise-beats li {
    color: var(--at-text) !important;
    font-size: 1rem !important;
    opacity: 1 !important;
}

.narrative-signature {
    color: var(--at-muted) !important;
}

/* --- Actions (v4 .btn / .btn-primary / .btn-secondary) --- */
.primary-btn,
.nav-btn,
.copy-btn {
    padding: 12px 20px;
    border: var(--vl-border-width) solid var(--at-border) !important;
    border-radius: var(--vl-radius-control) !important;
    background-color: var(--at-accent) !important;
    color: var(--at-accent-ink) !important;
    box-shadow: none !important;
    font-size: var(--vl-font-size-body) !important;
    font-weight: var(--vl-font-weight-control) !important;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--vl-transition), color var(--vl-transition), border-color var(--vl-transition) !important;
}

.primary-btn:hover,
.nav-btn:hover:not(:disabled),
.copy-btn:hover {
    background-color: var(--at-hover-primary) !important;
    border-color: var(--at-hover-primary) !important;
    color: var(--at-accent-ink) !important;
    transform: none !important;
    box-shadow: none !important;
}

body.aituner-dark .primary-btn,
body.aituner-dark .nav-btn,
body.aituner-dark .copy-btn {
    background-color: #ffffff !important;
    color: #000000 !important;
    border-color: #ffffff !important;
}

body.aituner-dark .primary-btn:hover,
body.aituner-dark .nav-btn:hover:not(:disabled),
body.aituner-dark .copy-btn:hover {
    background-color: #cccccc !important;
    border-color: #cccccc !important;
    color: #000000 !important;
}

body.aituner-light .primary-btn,
body.aituner-light .nav-btn,
body.aituner-light .copy-btn {
    background-color: #000000 !important;
    color: #ffffff !important;
    border-color: #000000 !important;
}

body.aituner-light .primary-btn:hover,
body.aituner-light .nav-btn:hover:not(:disabled),
body.aituner-light .copy-btn:hover {
    background-color: #333333 !important;
    border-color: #333333 !important;
    color: #ffffff !important;
}

.secondary-btn {
    color: var(--at-text) !important;
    text-decoration: underline !important;
    text-underline-offset: 3px !important;
    font-weight: var(--vl-font-weight-control) !important;
    background: transparent !important;
    border: none !important;
}

/* --- Tier badge --- */
.tier-badge {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: var(--vl-font-weight-control);
    z-index: 1000;
    cursor: pointer;
    font-family: inherit;
    background-color: var(--at-accent) !important;
    color: var(--at-accent-ink) !important;
    border: var(--vl-border-width) solid var(--at-border) !important;
    border-radius: var(--vl-radius-control) !important;
    box-shadow: none !important;
}

body.aituner-dark .tier-badge {
    background-color: #ffffff !important;
    color: #000000 !important;
    border-color: #ffffff !important;
}

body.aituner-light .tier-badge {
    background-color: #000000 !important;
    color: #ffffff !important;
    border-color: #000000 !important;
}

/* --- Session restore (high contrast strip) --- */
.session-restore-banner {
    background: #000000 !important;
    color: #ffffff !important;
    border-bottom: 2px solid #ffffff !important;
}

.session-restore-banner .session-continue {
    background: #ffffff !important;
    color: #000000 !important;
    border: 2px solid #ffffff !important;
    border-radius: var(--vl-radius) !important;
}

.session-restore-banner .session-fresh {
    border: 2px solid #ffffff !important;
    color: #ffffff !important;
    border-radius: var(--vl-radius) !important;
}

/* --- Cards & surfaces --- */
.entry-card,
.screen-content,
.model-room-main {
    background: var(--at-surface) !important;
    border: var(--vl-border-width) solid var(--at-border) !important;
    border-radius: var(--vl-radius) !important;
    box-shadow: none !important;
}

.entry-card:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12) !important;
}

body.aituner-dark .entry-card:hover {
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.08) !important;
}

/* Home — breathing room inside outlined cards/chips */

.entry-points .entry-card {
    padding: 1.75rem 1.5rem !important;
}

.entry-points .entry-card h2 {
    font-size: 1.125rem !important;
    font-weight: var(--vl-font-weight-heading) !important;
    line-height: 1.35 !important;
    margin: 0 0 0.75rem !important;
    color: var(--at-heading) !important;
}

.entry-points .entry-card p {
    font-size: 0.9375rem !important;
    line-height: 1.6 !important;
    margin: 0 !important;
    color: var(--at-text-secondary) !important;
}

.entry-points .entry-card-setup,
.entry-points #entry-card-project-setup {
    grid-column: 1 / -1 !important;
}

#home-view .entry-points {
    gap: 28px !important;
    margin-top: 2.5rem !important;
}

.home-setup-picker {
    margin-top: 1.25rem !important;
}

.home-setup-picker-label,
.home-setup-preferred-note {
    line-height: 1.55 !important;
}

.home-setup-preferred-note {
    margin-bottom: 0.75rem !important;
}

.intent-card,
.model-card {
    background: #ffffff !important;
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
}

body.aituner-dark .intent-card,
body.aituner-dark .model-card {
    background: #1a1a1a !important;
    border-color: #ffffff !important;
}

.intent-card:hover,
.model-card:hover {
    border-color: #000000 !important;
    box-shadow: 0 0 0 1px #000000 !important;
    transform: translateY(-1px) !important;
}

body.aituner-dark .intent-card:hover,
body.aituner-dark .model-card:hover {
    border-color: #ffffff !important;
    box-shadow: 0 0 0 2px #ffffff !important;
}

.intent-card h3,
.model-card h3 {
    color: var(--at-heading) !important;
}

.frustration-card {
    background: #fafafa !important;
    border: 2px solid #e0e0e0 !important;
    border-radius: var(--vl-radius) !important;
}

.frustration-card:hover {
    border-color: #000000 !important;
}

.frustration-card.selected {
    background: #000000 !important;
    color: #ffffff !important;
    border-color: #000000 !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2) !important;
}

.frustration-card.selected .frustration-title,
.frustration-card.selected .frustration-sub {
    color: #ffffff !important;
}

body.aituner-dark .frustration-card {
    background: #1a1a1a !important;
    border-color: #ffffff !important;
    color: #ffffff !important;
}

body.aituner-dark .frustration-card .frustration-title {
    color: #ffffff !important;
}

body.aituner-dark .frustration-card .frustration-sub {
    color: #cccccc !important;
}

body.aituner-dark .frustration-card.selected {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #ffffff !important;
}

body.aituner-dark .frustration-card.selected .frustration-title,
body.aituner-dark .frustration-card.selected .frustration-sub {
    color: #000000 !important;
}

.promise-icon {
    border-color: #000000 !important;
}

body.aituner-dark .promise-icon {
    border-color: #ffffff !important;
}

/* --- Prompt preview (readable: light grey box / dark inverted) --- */
.prompt-preview {
    background: #f8f8f8 !important;
    color: #000000 !important;
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
}

.prompt-preview pre {
    color: #000000 !important;
}

body.aituner-dark .prompt-preview {
    background: #000000 !important;
    color: #ffffff !important;
    border-color: #ffffff !important;
}

body.aituner-dark .prompt-preview pre {
    color: #ffffff !important;
}

.prompt-how-built-details {
    margin-top: 12px !important;
    padding-top: 12px !important;
    border-top: 1px solid var(--at-border-soft, #e0e0e0) !important;
    font-size: 0.92rem !important;
}

body.aituner-dark .prompt-how-built-details {
    border-top-color: #444444 !important;
}

.prompt-how-built-summary {
    cursor: pointer;
    font-weight: 600 !important;
    color: var(--at-text) !important;
}

.prompt-how-built-body {
    margin-top: 8px !important;
    color: var(--at-muted) !important;
    line-height: 1.45 !important;
}

.prompt-preview-body-host .prompt-text {
    margin: 0 0 12px 0 !important;
}

/* --- Discovery (remove amber; B&W frames) --- */
.discovery-lead,
.discovery-h2,
.discovery-q-text {
    color: var(--at-heading) !important;
}

.discovery-q-desc {
    color: var(--at-muted) !important;
}

.discovery-q-card {
    border: 2px solid #e0e0e0 !important;
    border-radius: var(--vl-radius) !important;
    background: #ffffff !important;
}

.discovery-q-card:hover {
    border-color: #000000 !important;
}

.discovery-q-card.selected {
    border-color: #000000 !important;
    border-width: 3px !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

body.aituner-dark .discovery-q-card {
    background: #1a1a1a !important;
    border-color: #ffffff !important;
}

body.aituner-dark .discovery-q-card.selected {
    box-shadow: 0 0 0 2px #ffffff !important;
}

.discovery-model-check {
    background: #fafafa !important;
    border: 1px solid #e0e0e0 !important;
    border-radius: var(--vl-radius) !important;
}

body.aituner-dark .discovery-model-check {
    background: #1a1a1a !important;
    border-color: #ffffff !important;
    color: #ffffff !important;
}

.discovery-placeholder {
    background: #f0f0f0 !important;
    color: #000000 !important;
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
}

body.aituner-dark .discovery-placeholder {
    background: #1a1a1a !important;
    color: #ffffff !important;
    border-color: #ffffff !important;
}

.discovery-tune-card,
.discovery-compare-card {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    background: #ffffff !important;
}

body.aituner-dark .discovery-tune-card,
body.aituner-dark .discovery-compare-card {
    background: #1a1a1a !important;
    border-color: #ffffff !important;
}

/* Compare grid typography — app shell historically set slate hex; force contrast on dark cards */
.discovery-compare-lead {
    color: var(--at-text) !important;
}

.discovery-compare-lead strong {
    color: inherit !important;
}

.discovery-compare-name {
    color: #000000 !important;
}

.discovery-compare-q {
    color: var(--at-text-secondary) !important;
}

.discovery-compare-q-label {
    color: #000000 !important;
    font-weight: 700 !important;
}

body.aituner-dark .discovery-compare-name {
    color: #ffffff !important;
}

body.aituner-dark .discovery-compare-q {
    color: #e5e5e5 !important;
}

body.aituner-dark .discovery-compare-q-label {
    color: #ffffff !important;
}

.discovery-notice-title {
    color: #000000 !important;
}

.discovery-notice-sub {
    color: #666666 !important;
}

body.aituner-dark .discovery-notice-title {
    color: #ffffff !important;
}

body.aituner-dark .discovery-notice-sub {
    color: #cccccc !important;
}

.discovery-compare-sample {
    background: #f5f5f5 !important;
    border: 1px solid #e0e0e0 !important;
    color: #000000 !important;
}

body.aituner-dark .discovery-compare-sample {
    background: #000000 !important;
    border-color: #ffffff !important;
    color: #ffffff !important;
}

.discovery-notice-section {
    border-top-color: var(--at-border) !important;
}

.discovery-notice-chip {
    border-radius: var(--vl-radius) !important;
    border: 2px solid #000000 !important;
    background: #ffffff !important;
    color: #000000 !important;
}

.discovery-notice-chip:hover {
    background: #000000 !important;
    color: #ffffff !important;
}

body.aituner-dark .discovery-notice-chip {
    border-color: #ffffff !important;
    background: #1a1a1a !important;
    color: #ffffff !important;
}

body.aituner-dark .discovery-notice-chip:hover {
    background: #ffffff !important;
    color: #000000 !important;
}

/* --- Decoder --- */
.decoder-intro,
.decoder-muted,
.decoder-meaning {
    color: var(--at-muted) !important;
}

.decoder-textarea,
.decoder-select {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    background: #ffffff !important;
    color: #000000 !important;
}

body.aituner-dark .decoder-textarea,
body.aituner-dark .decoder-select {
    background: #1a1a1a !important;
    color: #ffffff !important;
    border-color: #ffffff !important;
}

.decoder-results-title,
.decoder-subhead {
    color: var(--at-heading) !important;
}

.decoder-val {
    color: var(--at-text) !important;
    font-weight: 700 !important;
}

.decoder-breakdown-item {
    border-bottom-color: var(--at-border-soft) !important;
}

body.aituner-dark .decoder-breakdown-item {
    border-bottom-color: #444444 !important;
}

.decoder-unmapped {
    background: #f8f8f8 !important;
    border: 2px solid #000000 !important;
    color: #000000 !important;
}

body.aituner-dark .decoder-unmapped {
    background: #000000 !important;
    border-color: #ffffff !important;
    color: #ffffff !important;
}

/* --- Profile panel --- */
.profile-panel-overlay {
    position: fixed !important;
    inset: 0 !important;
    z-index: 2000 !important;
    display: flex !important;
    align-items: flex-start !important;
    justify-content: center !important;
    padding: 72px 16px 16px !important;
    background: rgba(0, 0, 0, 0.55) !important;
}

.profile-panel-dialog {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25) !important;
    max-width: 420px !important;
    width: 100% !important;
    padding: 24px 28px 28px !important;
    position: relative !important;
    max-height: calc(100vh - 96px) !important;
    overflow-y: auto !important;
    background: var(--at-surface) !important;
}

body.aituner-dark .profile-panel-dialog {
    border-color: #ffffff !important;
}

.profile-panel-close {
    position: absolute !important;
    top: 12px !important;
    right: 14px !important;
    border: none !important;
    background: none !important;
    cursor: pointer !important;
    font-size: 28px !important;
    color: var(--at-muted) !important;
}

.profile-panel-dialog h2,
.profile-section h3 {
    color: var(--at-heading) !important;
}

.profile-muted {
    color: var(--at-muted) !important;
}

.profile-next {
    color: var(--at-text) !important;
}

.profile-config-src,
.profile-nudge {
    color: var(--at-text) !important;
    font-weight: 600 !important;
}

.profile-config-item {
    border-bottom-color: var(--at-border-soft) !important;
}

body.aituner-dark .profile-config-item {
    border-bottom-color: #444444 !important;
}

.profile-config-clickable:hover {
    background: #f0f0f0 !important;
}

body.aituner-dark .profile-config-clickable:hover {
    background: #ffffff !important;
    color: #000000 !important;
}

.profile-discovery-link,
.profile-discovery-compare button {
    color: inherit !important;
}

.profile-discovery-link {
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    background: none !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    text-decoration: underline !important;
}

.profile-discovery-link:hover {
    opacity: 0.85 !important;
}

.home-model-chip.home-model-chip-preferred {
    border-width: 3px !important;
    font-weight: 600 !important;
    padding: 0.7rem 1.2rem !important;
}

body.aituner-dark .home-model-chip.home-model-chip-preferred {
    border-color: #ffffff !important;
    background: #000000 !important;
    color: #ffffff !important;
    box-shadow: none !important;
}

/* --- Project setup (Knowledge / Instructions / Memory) — border weight only, monochrome --- */
.room-setup-zone {
    background: #fafafa !important;
    border-style: solid !important;
    border-color: rgba(0, 0, 0, 0.35) !important;
    border-width: 1px !important;
    color: #000000 !important;
}

.room-setup-zone strong {
    color: inherit !important;
}

.room-setup-zone span {
    color: #444444 !important;
}

.room-setup-zone-k {
    border-width: 3px !important;
    border-color: rgba(0, 0, 0, 0.92) !important;
}

.room-setup-zone-i {
    border-width: 2px !important;
    border-color: rgba(0, 0, 0, 0.55) !important;
}

.room-setup-zone-m {
    border-width: 1px !important;
    border-color: rgba(0, 0, 0, 0.35) !important;
}

.room-setup-field-label {
    color: var(--at-heading) !important;
}

.room-setup-brief-checklist {
    border: 2px solid #000000 !important;
    overflow: hidden !important;
}

body.aituner-dark .room-setup-brief-checklist {
    border-color: #ffffff !important;
}

.room-setup-brief-checklist li {
    border-bottom: 1px solid var(--at-border-soft) !important;
}

body.aituner-dark .room-setup-brief-checklist li {
    border-bottom-color: rgba(255, 255, 255, 0.35) !important;
}

.room-setup-check-title {
    color: var(--at-heading) !important;
}

.room-setup-preview {
    background: var(--at-surface) !important;
    color: var(--at-text) !important;
}

body.aituner-dark .room-setup-zone {
    background: #1a1a1a !important;
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.42) !important;
}

body.aituner-dark .room-setup-zone span {
    color: #cccccc !important;
}

body.aituner-dark .room-setup-zone-k {
    border-color: rgba(255, 255, 255, 0.95) !important;
}

body.aituner-dark .room-setup-zone-i {
    border-color: rgba(255, 255, 255, 0.62) !important;
}

body.aituner-dark .room-setup-zone-m {
    border-color: rgba(255, 255, 255, 0.38) !important;
}

body.aituner-dark .room-setup-upload-block {
    border-color: #ffffff !important;
    border-style: dashed !important;
    background: #1a1a1a !important;
}

.room-setup-cmd-list,
.room-setup-summary-list {
    color: var(--at-text) !important;
}

/* --- Model room --- */
.model-room-view {
    background: var(--at-page-bg) !important;
}

.room-entry-title,
.room-tour-section h2 {
    color: var(--at-heading) !important;
}

.room-tagline {
    color: var(--at-text-secondary) !important;
    font-weight: 600 !important;
}

.room-prose,
.room-bullet-list {
    color: var(--at-text) !important;
}

.room-source-tag {
    color: var(--at-text) !important;
}

.room-pillar-title,
.room-style-import-label {
    color: var(--at-text) !important;
    font-weight: 600 !important;
}

.room-mode-tile {
    border: 2px solid #e0e0e0 !important;
    border-radius: var(--vl-radius) !important;
    background: #fafafa !important;
    /* buttons use UA dark foreground; tiles set their own surface + text colors */
    color: #111111 !important;
}

.room-mode-tile-title {
    color: #111111 !important;
}

.room-mode-tile-blurb {
    color: #4a4a4a !important;
    line-height: 1.45 !important;
}

.room-mode-caption {
    color: var(--at-text-secondary) !important;
}

.room-mode-tile:hover {
    border-color: #000000 !important;
    background: #ffffff !important;
}

.room-mode-tile:hover .room-mode-tile-title {
    color: #000000 !important;
}

.room-mode-tile:hover .room-mode-tile-blurb {
    color: var(--at-text-secondary) !important;
}

body.aituner-dark .room-mode-tile {
    border-color: #ffffff !important;
    background: #1a1a1a !important;
    color: #ffffff !important;
}

body.aituner-dark .room-mode-tile-title {
    color: #ffffff !important;
}

body.aituner-dark .room-mode-tile-blurb {
    color: #b8b8b8 !important;
}

body.aituner-dark .room-mode-caption {
    color: #cfcfcf !important;
}

body.aituner-dark .room-mode-tile:hover {
    background: #222222 !important;
}

body.aituner-dark .room-mode-tile:hover .room-mode-tile-blurb {
    color: #d6d6d6 !important;
}

.model-room-tabs {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0;
    width: 100%;
    margin: 0 0 16px;
    padding: 0;
    border-bottom: 2px solid var(--at-border);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.model-room-tabs::-webkit-scrollbar {
    display: none;
}

.model-room-tab {
    flex: 0 0 auto;
    margin: 0;
    padding: 10px 14px;
    border: none;
    border-bottom: 3px solid transparent;
    border-radius: 0;
    background: transparent;
    color: var(--at-muted) !important;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    margin-bottom: -2px;
}

.model-room-tab:hover {
    color: var(--at-heading) !important;
    background: var(--at-surface-alt, rgba(0, 0, 0, 0.04)) !important;
}

body.aituner-dark .model-room-tab:hover {
    background: #1a1a1a !important;
    color: #ffffff !important;
}

.model-room-tab-active,
.model-room-tab[aria-selected='true'] {
    color: var(--at-heading) !important;
    border-bottom-color: var(--at-border);
    background: transparent !important;
}

body.aituner-dark .model-room-tab-active,
body.aituner-dark .model-room-tab[aria-selected='true'] {
    color: #ffffff !important;
    border-bottom-color: #ffffff;
}

.room-fingerprint-section,
.room-expand-panel {
    border-top: 2px solid var(--at-border-soft) !important;
}

body.aituner-dark .room-fingerprint-section,
body.aituner-dark .room-expand-panel {
    border-color: var(--at-border-soft) !important;
}

/* Room tour — apparent prime directive */
.room-prime-directive-block {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--at-border-soft);
    text-align: left;
}

.room-prime-directive-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--at-text);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.room-prime-directive-tip {
    cursor: help;
    font-size: 14px;
    line-height: 1;
    color: var(--at-muted);
    transition: transform: var(--vl-transition);
}

.room-prime-directive-tip:hover,
.room-prime-directive-tip:focus-visible {
    transform: scale(1.1);
}

.room-prime-directive-text {
    font-size: 15px;
    line-height: 1.55;
    color: var(--at-text);
    margin: 0;
}

/* Discovery — Truth-Seeker suggestion */
.discovery-persona-nudge {
    margin: 12px 0 20px;
    padding: 12px 14px;
    border: 2px solid var(--at-border);
    border-radius: var(--vl-radius);
    background: var(--at-surface);
    font-size: 15px;
    line-height: 1.5;
    color: var(--at-text);
}

body.aituner-dark .discovery-persona-nudge {
    border-color: #ffffff;
}

.room-style-select {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
}

body.aituner-dark .room-style-select {
    border-color: #ffffff !important;
    background: #1a1a1a !important;
    color: #ffffff !important;
}

/* --- Home model chips --- */
.home-model-entry h2 {
    color: var(--at-heading) !important;
    margin-bottom: 1.25rem !important;
}

.home-model-chips {
    gap: 12px 14px !important;
    justify-content: center !important;
    align-items: flex-start !important;
}

.home-model-chip {
    padding: 0.65rem 1.125rem !important;
    line-height: 1.4 !important;
    min-height: 2.75rem !important;
    box-sizing: border-box !important;
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    background: #ffffff !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
}

.home-model-chip:hover {
    background: #000000 !important;
    color: #ffffff !important;
    box-shadow: none !important;
}

body.aituner-dark .home-model-chip {
    background: #1a1a1a !important;
    border-color: #ffffff !important;
    color: #ffffff !important;
}

body.aituner-dark .home-model-chip:hover {
    background: #ffffff !important;
    color: #000000 !important;
}

/* --- Back button --- */
.view-back-btn {
    border: 2px solid #000000 !important;
    background: #ffffff !important;
    color: #000000 !important;
    border-radius: var(--vl-radius) !important;
    font-weight: 500 !important;
}

.view-back-btn:hover {
    background: #000000 !important;
    color: #ffffff !important;
}

body.aituner-dark .view-back-btn {
    border-color: #ffffff !important;
    background: #000000 !important;
    color: #ffffff !important;
}

body.aituner-dark .view-back-btn:hover {
    background: #ffffff !important;
    color: #000000 !important;
}

/* --- Toast --- */
.aituner-toast {
    border: 2px solid #ffffff !important;
    border-radius: var(--vl-radius) !important;
}

.aituner-toast-success {
    background: #000000 !important;
    color: #ffffff !important;
}

body.aituner-dark .aituner-toast-success {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #000000 !important;
}

/* --- Sliders (v3.5 style-v6) --- */
.lever-slider-wrapper {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #e0e0e0;
}

body.aituner-dark .lever-slider-wrapper {
    border-bottom-color: #444444;
}

.lever-slider-wrapper .lever-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.lever-slider-wrapper .lever-name {
    font-weight: 500;
    font-size: 0.95rem;
    color: #000000;
}

body.aituner-dark .lever-slider-wrapper .lever-name {
    color: #ffffff;
}

.lever-slider-wrapper .lever-value {
    font-weight: 600;
    font-size: 1.1rem;
    color: #000000;
}

body.aituner-dark .lever-slider-wrapper .lever-value {
    color: #ffffff;
}

.lever-slider-wrapper .lever-description {
    font-size: 0.85rem;
    color: #666666;
    margin-bottom: 10px;
    line-height: 1.4;
}

body.aituner-dark .lever-slider-wrapper .lever-description {
    color: #aaaaaa;
}

.lever-slider-wrapper .lever-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    font-size: 0.75rem;
    color: #999999;
}

input.lever-slider[type='range'] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #e0e0e0;
    outline: none;
    -webkit-appearance: none;
}

body.aituner-dark input.lever-slider[type='range'] {
    background: #444444;
}

input.lever-slider[type='range']::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #000000;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.aituner-dark input.lever-slider[type='range']::-webkit-slider-thumb {
    background: #ffffff;
    border-color: #000000;
}

input.lever-slider[type='range']::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #000000;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.aituner-dark input.lever-slider[type='range']::-moz-range-thumb {
    background: #ffffff;
    border-color: #000000;
}

/* --- Act V graduation overlay (Architect) --- */
.act5-graduation-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 5000;
    background: rgba(0, 0, 0, 0.55);
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.architect-about {
    max-width: 720px !important;
    margin: 0 auto 48px !important;
    padding: 28px 32px !important;
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    text-align: left !important;
    background: var(--at-surface) !important;
}

body.aituner-dark .architect-about {
    border-color: #ffffff !important;
}

.architect-about h2 {
    color: var(--at-heading) !important;
}

.architect-about p {
    color: var(--at-text) !important;
}

.architect-about .architect-mission {
    margin-top: 20px !important;
    padding-top: 16px !important;
    border-top: 2px solid var(--at-border-soft) !important;
    font-weight: 500 !important;
    color: var(--at-heading) !important;
}

body.aituner-dark .architect-about .architect-mission {
    border-top-color: rgba(255, 255, 255, 0.45) !important;
}

/* --- Architect page (class set in architect.html for broad browser support) --- */
body.architect-page {
    background: #f5f5f5 !important;
    color: #000000 !important;
}

body.aituner-dark.architect-page {
    background: #000000 !important;
    color: #ffffff !important;
}

.architect-header h1 {
    font-size: 3rem !important;
    font-weight: var(--vl-font-weight-display) !important;
    letter-spacing: var(--vl-letter-spacing-display) !important;
    color: var(--at-heading) !important;
}

.architect-header p {
    font-size: var(--vl-font-size-subtitle) !important;
    color: var(--at-text-secondary) !important;
}

.architect-container .tier-badge {
    box-shadow: none !important;
}

.controls-panel,
.radar-panel {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    background: #ffffff !important;
}

body.aituner-dark .controls-panel,
body.aituner-dark .radar-panel {
    border-color: var(--at-border-soft) !important;
    background: var(--at-surface) !important;
}

body.aituner-dark .architect-container .panel-title {
    color: #ffffff !important;
}

.prompt-display {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
}

body.aituner-dark .prompt-display {
    border-color: #ffffff !important;
    background: #000000 !important;
}

body.aituner-dark .architect-container .prompt-text {
    color: #ffffff !important;
}

.architect-container .copy-btn {
    background: #000000 !important;
    color: #ffffff !important;
    border: 2px solid #000000 !important;
}

.architect-container .save-config-btn {
    background: #ffffff !important;
    color: #000000 !important;
    border: 2px solid #000000 !important;
}

.architect-container .save-config-btn:hover {
    background: #000000 !important;
    color: #ffffff !important;
}

body.aituner-dark .architect-container .copy-btn {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #ffffff !important;
}

body.aituner-dark .architect-container .save-config-btn {
    background: #1a1a1a !important;
    color: #ffffff !important;
    border-color: #ffffff !important;
}

body.aituner-dark .architect-container .save-config-btn:hover {
    background: var(--at-hover-primary) !important;
    color: #000000 !important;
    border-color: var(--at-hover-primary) !important;
}

body.aituner-dark .architect-container .copy-btn:hover {
    background: var(--at-hover-primary) !important;
    border-color: var(--at-hover-primary) !important;
    color: #000000 !important;
}

.act5-graduation-dialog {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
}

body.aituner-dark .act5-graduation-dialog {
    border-color: #ffffff !important;
    background: #1a1a1a !important;
}

.act5-dismiss {
    border-radius: var(--vl-radius) !important;
    background: #000000 !important;
    color: #ffffff !important;
    border: 2px solid #000000 !important;
}

body.aituner-dark .act5-dismiss {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #ffffff !important;
}

.act5-graduation-body,
.act5-graduation-body p {
    color: #666666 !important;
}

body.aituner-dark .act5-graduation-body,
body.aituner-dark .act5-graduation-body p {
    color: #e0e0e0 !important;
}

body.aituner-dark .act5-graduation-dialog h2 {
    color: #ffffff !important;
}

.act5-small {
    color: #666666 !important;
}

body.aituner-dark .act5-small {
    color: #999999 !important;
}

/* Lists: custom bullet feel (guide) */
.room-bullet-list {
    list-style: none !important;
    padding-left: 0 !important;
}

.room-bullet-list li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.35rem;
}

.room-bullet-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #000000;
}

body.aituner-dark .room-bullet-list li::before {
    background: #ffffff;
}

/* --- App shell layout (app.html) --- */
.session-restore-banner {
    padding: 14px 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 16px;
    justify-content: center;
    font-size: 15px;
}

.session-restore-banner p {
    margin: 0;
    flex: 1 1 280px;
    text-align: center;
}

.session-restore-banner button {
    padding: 8px 18px;
    border-radius: var(--vl-radius);
    font-weight: 600;
    cursor: pointer;
    font-size: 14px;
}

.decoder-intro {
    margin-bottom: 12px;
}

.decoder-textarea {
    width: 100%;
    padding: 14px;
    border-radius: var(--vl-radius);
    font-family: ui-monospace, monospace;
    font-size: 13px;
    margin-bottom: 12px;
    resize: vertical;
}

.decoder-example-wrap {
    margin: 8px 0 12px;
}

.decoder-unmapped-list {
    margin: 8px 0;
    padding-left: 1.25rem;
    font-size: 14px;
}

.decoder-decode-btn {
    margin-bottom: 24px;
}

.decoder-results-title {
    font-size: 22px;
    margin-bottom: 16px;
}

.decoder-subhead {
    font-size: 15px;
    margin: 20px 0 10px;
}

.decoder-breakdown-item {
    padding: 12px 0;
    font-size: 14px;
}

.decoder-val {
    font-weight: 600;
}

.decoder-meaning {
    margin: 6px 0 0;
    font-size: 13px;
    line-height: 1.5;
}

.decoder-muted {
    font-size: 14px;
}

.decoder-unmapped {
    padding: 12px;
    border-radius: var(--vl-radius);
    font-size: 13px;
    white-space: pre-wrap;
}

.decoder-radar-wrap {
    min-height: 120px;
    margin: 16px 0;
}

.decoder-model-row {
    margin: 20px 0 12px;
    font-size: 14px;
}

.decoder-select {
    margin-left: 8px;
    padding: 6px 10px;
}

.decoder-cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
}

.discovery-lead {
    margin-bottom: 20px;
    max-width: 640px;
}

.discovery-h2 {
    font-size: 17px;
    margin: 24px 0 12px;
}

.discovery-q-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}

.discovery-q-card {
    text-align: left;
    padding: 16px;
    border-radius: var(--vl-radius);
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.discovery-q-text {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
}

.discovery-q-desc {
    display: block;
    font-size: 12px;
}

.discovery-model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.discovery-model-check {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    padding: 8px;
    border-radius: var(--vl-radius);
}

.discovery-placeholder {
    margin-top: 24px;
    padding: 20px;
    border-radius: var(--vl-radius);
    font-size: 14px;
}

.discovery-tune-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    margin-top: 12px;
}

.discovery-tune-card {
    padding: 14px;
    border-radius: var(--vl-radius);
}

.discovery-tune-name {
    font-weight: 600;
    margin-bottom: 10px;
}

.discovery-compare-wrap {
    margin-top: 8px;
}

.discovery-compare-lead {
    font-size: 15px;
    margin-bottom: 16px;
}

.discovery-compare-grid {
    display: grid;
    gap: 16px;
    margin-bottom: 28px;
}

.discovery-compare-grid--1 {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.discovery-compare-grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.discovery-compare-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.discovery-compare-grid--4 {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 960px) {
.discovery-compare-grid--2,
    .discovery-compare-grid--3,
    .discovery-compare-grid--4 {
    grid-template-columns: 1fr;
}
}

.discovery-compare-card {
    padding: 16px;
    text-align: left;
}

.discovery-compare-name {
    font-size: 17px;
    margin-bottom: 8px;
}

.discovery-compare-q {
    font-size: 13px;
    margin-bottom: 10px;
}

.discovery-compare-q-label {
    font-weight: 600;
}

.discovery-compare-sample {
    font-size: 14px;
    line-height: 1.55;
    max-height: 160px;
    overflow-y: auto;
    margin-bottom: 12px;
    padding: 10px;
    border-radius: var(--vl-radius);
}

.discovery-mini-radar-host {
    min-height: 100px;
    margin-bottom: 12px;
}

.discovery-notice-section {
    padding-top: 20px;
    margin-top: 8px;
}

.discovery-notice-title {
    font-size: 18px;
    margin-bottom: 6px;
}

.discovery-notice-sub {
    font-size: 14px;
    margin-bottom: 12px;
}

.discovery-notice-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.discovery-notice-chip {
    padding: 10px 16px;
    border-radius: var(--vl-radius-control);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}

.view-back-btn {
    margin-bottom: 16px;
    padding: 8px 16px;
    border-radius: var(--vl-radius);
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.entry-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.hero {
    text-align: center;
    margin-bottom: 60px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 16px;
}

.hero p {
    font-size: 20px;
}

.view-container {
    min-height: 100vh;
}

.onboarding-screen {
    padding: 40px 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.screen-content {
    padding: 48px;
}

.screen-content h1 {
    font-size: 32px;
    margin-bottom: 16px;
}

.screen-content .subtitle {
    font-size: 18px;
    margin-bottom: 32px;
}

.intent-grid,
.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 32px 0;
}

.intent-card,
.model-card {
    padding: 24px;
    cursor: pointer;
    transition: all 0.2s;
}

.intent-card:hover,
.model-card:hover {
    transform: translateY(-2px);
}

.intent-card h3,
.model-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.primary-btn,
.nav-btn {
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.secondary-btn {
    padding: 12px 24px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: underline;
}

.screen-nav {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    justify-content: space-between;
}

.screen-nav-top {
    margin-top: 0;
    margin-bottom: 24px;
    justify-content: flex-start;
}

.screen-nav-footer {
    justify-content: flex-end;
}

.onboarding-screen .screen-content > .screen-nav:not(.screen-nav-top) {
    position: sticky;
    bottom: 0;
    padding: 12px 0 4px;
    background: var(--at-surface);
    z-index: 2;
}

.prompt-preview {
    border-radius: var(--vl-radius);
    padding: 24px;
    margin: 24px 0;
}

.prompt-preview pre {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    line-height: 1.6;
    white-space: pre-wrap;
    margin-bottom: 16px;
}

.copy-btn {
    padding: 8px 16px;
    border-radius: var(--vl-radius);
    cursor: pointer;
    font-family: inherit;
}

.tuner-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin: 32px 0;
}

.tier1-prompt-region {
    margin-top: 8px;
}

.prompt-screen.tier-1 .tier1-prompt-region .prompt-preview {
    margin-top: 0;
}

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

.narrative-content h1 {
    line-height: 1.2;
}

.narrative-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    margin-bottom: 12px;
}

.narrative-sub {
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

.narrative-body {
    text-align: left;
    max-width: 38rem;
    margin: 0 auto 24px;
    font-size: 17px;
    line-height: 1.65;
}

.decoder-view-header {
    margin-bottom: 24px;
}

.frustration-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px;
    margin: 28px 0;
}

.frustration-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    padding: 18px;
    border-radius: var(--vl-radius);
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.frustration-title {
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 16px;
}

.frustration-sub {
    font-size: 14px;
}

.frustration-explore {
    display: block;
    margin: 8px auto 24px;
}

#frustration-continue:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.fix-instruction,
.fix-footnote {
    font-size: 14px;
    margin: 12px 0;
}

.fix-cta-row {
    margin: 16px 0;
}

.narrative-prompt-preview {
    margin: 20px 0;
}

.reveal-body {
    text-align: left;
    max-width: 36rem;
    margin: 0 auto 20px;
    font-size: 16px;
    line-height: 1.65;
}

.reveal-body p {
    margin-bottom: 12px;
}

.reveal-radar-host {
    min-height: 140px;
    margin: 20px 0;
}

.reveal-caption {
    font-size: 15px;
    margin: 16px auto 20px;
    max-width: 32rem;
}

.reveal-quiet {
    display: block;
    margin: 16px auto 0;
}

.aituner-toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    max-width: min(90vw, 420px);
    padding: 14px 22px;
    border-radius: var(--vl-radius);
    font-size: 15px;
    line-height: 1.45;
    z-index: 3000;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.aituner-toast-show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.home-model-entry {
    max-width: 800px;
    margin: 48px auto 0;
    padding: 0 20px;
}

.home-model-entry h2 {
    font-size: 18px;
    margin-bottom: 16px;
    text-align: center;
}

.home-model-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.home-model-chip {
    padding: 10px 16px;
    border-radius: var(--vl-radius-control);
    font-size: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.home-setup-picker {
    display: none;
    margin-top: 18px;
    padding-top: 14px;
    text-align: left;
    opacity: 0.85;
}

.home-setup-picker.is-open {
    display: block;
}

.home-setup-picker-label {
    font-size: 14px;
    margin: 0 0 12px;
    line-height: 1.45;
}

.home-setup-preferred-note {
    font-size: 13px;
    margin: -4px 0 12px;
    font-weight: 600;
}

.model-room-view {
    min-height: 100vh;
}

.model-room-inner {
    max-width: min(1200px, 96vw);
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.aituner-v5-radar-grid--room {
    width: 100%;
    max-width: 100%;
}

.aituner-v5-radar-grid--room .aituner-v5-radar-card canvas {
    max-height: min(38vw, 400px) !important;
}

@media (max-width: 640px) {
    .aituner-v5-radar-grid--room {
        grid-template-columns: 1fr !important;
    }

    .aituner-v5-radar-grid--room .aituner-v5-radar-card canvas {
        max-height: min(72vw, 360px) !important;
    }
}

.model-room-main {
    padding: 32px 28px 40px;
    min-height: 280px;
    width: 100%;
    box-sizing: border-box;
}

/* Legacy class names — bottom nav removed in favor of .model-room-tabs */

.room-entry-title {
    font-size: 28px;
    margin-bottom: 8px;
}

.room-tagline {
    font-size: 17px;
    margin-bottom: 20px;
    font-weight: 500;
}

.room-entry-radar-host,
.room-tune-radar-host {
    min-height: 200px;
}

.aituner-v5-radar-card canvas {
    touch-action: none;
}

.room-tune-radar-host {
    margin: 12px 0 20px;
}

.room-prompt-panel {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 2px solid var(--at-border-soft);
    text-align: left;
}

.room-prompt-panel-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.room-prompt-panel-header .room-subhead {
    margin: 0;
}

.room-prompt-textarea {
    display: block;
    width: 100%;
    box-sizing: border-box;
    min-height: 280px;
    height: 280px;
    margin: 0;
    padding: 14px 16px;
    font-family: ui-monospace, 'SF Mono', Menlo, Monaco, Consolas, monospace;
    font-size: 13px;
    line-height: 1.5;
    resize: vertical;
    border: 2px solid var(--at-border);
    border-radius: var(--vl-radius);
    background: var(--at-surface);
    color: var(--at-text);
    -webkit-text-fill-color: currentColor;
}

.room-prompt-textarea::placeholder {
    color: var(--at-text-secondary);
    opacity: 1;
}

body.aituner-dark .room-prompt-textarea {
    background: #0a0a0a;
    border-color: #ffffff;
    color: #f3f4f6;
}

body.aituner-light .room-prompt-textarea {
    background: #f8f8f8;
    border-color: #000000;
    color: #111111;
}

.room-prompt-hint {
    margin: 10px 0 0;
    font-size: 13px;
    line-height: 1.45;
    color: var(--at-text-secondary);
}

.room-tour-section {
    margin-bottom: 32px;
    text-align: left;
}

.room-tour-section h2 {
    font-size: 20px;
    margin-bottom: 12px;
}

.room-prose {
    font-size: 16px;
    line-height: 1.65;
    margin-bottom: 8px;
}

.room-source-tag {
    font-size: 13px;
    font-weight: 600;
    margin-top: 12px;
}

.room-source-meta {
    font-size: 12px;
    margin-top: 4px;
    line-height: 1.4;
}

.room-subhead {
    font-size: 14px;
    font-weight: 600;
    margin: 16px 0 8px;
}

.room-bullet-list {
    padding-left: 1.25rem;
    margin: 0 0 8px;
    line-height: 1.55;
}

.room-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 600px) {
.room-two-col {
    grid-template-columns: 1fr;
}
}

.room-secondary-link-wrap {
    margin-top: 20px;
    text-align: center;
}

.room-mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    margin: 16px 0;
}

.room-mode-tile {
    text-align: left;
    padding: 14px;
    border-radius: var(--vl-radius);
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s, background 0.15s;
}

.room-mode-tile-title {
    display: block;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 6px;
}

.room-mode-tile-blurb {
    display: block;
    font-size: 12px;
    line-height: 1.4;
}

.room-mode-caption {
    font-size: 14px;
    margin-top: 8px;
    line-height: 1.5;
}

.room-fingerprint-section {
    margin: 24px 0;
    padding-top: 8px;
}

.room-expand-btn {
    display: block;
    margin: 12px 0;
    font-size: 15px;
    font-family: inherit;
}

.room-expand-panel {
    margin-top: 8px;
    padding-top: 12px;
}

.room-pillar-sliders {
    margin-bottom: 20px;
}

.room-pillar-title {
    font-size: 15px;
    margin-bottom: 10px;
}

.room-tune-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.room-hint {
    font-size: 14px;
    margin-bottom: 16px;
}

.room-style-label {
    display: block;
    font-size: 14px;
    margin-bottom: 6px;
}

.room-style-select {
    width: 100%;
    max-width: 320px;
    padding: 10px 12px;
    border-radius: var(--vl-radius);
    margin-bottom: 12px;
    font-size: 14px;
}

.room-style-import-label {
    font-size: 14px;
    font-weight: 600;
    min-height: 1.5em;
}

.room-tune-return-banner {
    margin: 36px -4px 18px;
    padding: 10px 0 12px;
}

.room-tune-return-link {
    display: inline;
    padding: 0;
    margin: 0;
    font: inherit;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    text-align: left;
    text-decoration: none;
    font-family: inherit;
}

.room-decode-scope {
    font-size: 15px;
    margin-bottom: 16px;
}

.profile-config-clickable {
    cursor: pointer;
    border-radius: var(--vl-radius);
    padding-left: 8px !important;
    margin-left: -8px !important;
}

.model-room-top-bar {
    margin-bottom: 10px;
    text-align: left;
}

.model-room-home-link {
    padding: 4px 0;
    margin: 0;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    letter-spacing: 0.01em;
    text-decoration: none;
}

.model-room-home-link:hover {
    text-decoration: underline;
}


.room-setup-wizard {
    text-align: left;
}

.room-setup-title {
    font-size: 1.4rem;
    line-height: 1.25;
    margin-bottom: 12px;
}

.room-setup-lead,
.room-setup-hint {
    font-size: 15px;
    line-height: 1.55;
    margin-bottom: 16px;
}

.room-setup-framing {
    font-size: 15px;
    line-height: 1.6;
    margin: 0 0 18px;
    color: var(--at-text);
}

.room-setup-lane-callout {
    margin: 0 0 20px;
    padding: 14px 16px;
    border-radius: var(--vl-radius);
    border: 2px solid var(--at-border-soft);
    background: var(--at-surface-alt, rgba(0, 0, 0, 0.03));
}

.room-setup-lane-callout-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 8px;
}

.room-setup-lane-callout-body {
    font-size: 14px;
    line-height: 1.55;
    margin: 0;
}

.room-setup-lane-reminder {
    font-size: 14px;
    line-height: 1.5;
    font-weight: 600;
    margin: -4px 0 16px;
}

.room-setup-steps-intro {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 8px;
}

.room-setup-steps-overview {
    margin: 0 0 24px;
    padding-left: 1.25rem;
    font-size: 14px;
    line-height: 1.6;
}

.room-setup-steps-overview li {
    margin-bottom: 8px;
}

.room-setup-zone-host {
    display: block;
    margin-top: 8px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
    opacity: 0.85;
}

.room-setup-meta {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}

.room-setup-zone-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 18px 0 24px;
}

.room-setup-zone {
    flex: 1;
    min-width: 106px;
    padding: 12px;
    border-radius: var(--vl-radius);
    font-size: 12px;
    line-height: 1.4;
}

.room-setup-zone strong {
    display: block;
    margin-bottom: 4px;
    font-size: 13px;
}

.room-setup-zone span {
    font-size: 11px;
}

.room-setup-field-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-top: 14px;
    margin-bottom: 6px;
}

.room-setup-brief-checklist {
    list-style: none;
    margin: 8px 0 16px;
    padding: 0;
}

.room-setup-brief-checklist li {
    padding: 12px 14px;
    margin: 0;
    font-size: 14px;
    line-height: 1.55;
}

.room-setup-check-title {
    font-weight: 600;
}

.room-setup-brief-ai-note {
    font-size: 14px;
    line-height: 1.55;
    margin: 16px 0 8px;
}

.room-setup-upload-block {
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: var(--vl-radius);
}

.room-setup-upload-path {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.45;
    margin-top: 4px;
}

.room-setup-preview {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 12px;
    margin-top: 8px;
    border-radius: var(--vl-radius);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.45;
    resize: vertical;
}

.room-setup-micro,
.room-setup-lead-soft {
    font-size: 13px;
    line-height: 1.5;
    margin: 16px 0 0;
}

.room-setup-lead-soft {
    margin-top: 0;
    margin-bottom: 14px;
}

.room-setup-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 22px;
}

.room-setup-saved-inline {
    margin-bottom: 12px;
}

.room-setup-config-chip {
    font-size: 12px !important;
    padding: 6px 10px !important;
    margin: 4px 4px 0 0 !important;
}

.room-setup-cmd-list {
    margin: 10px 0 0;
    padding-left: 1.25rem;
    line-height: 1.65;
}

.room-setup-inline-list {
    margin: 8px 0 16px;
}

.room-setup-summary-list {
    margin: 12px 0 20px;
    padding-left: 1.25rem;
    line-height: 1.6;
}

/* --- Architect page layout (architect.html) --- */
.architect-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 100px 40px 40px;
}

.architect-header {
    text-align: center;
    margin-bottom: 40px;
}

.architect-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: 8px;
    font-weight: 700;
}

.architect-header p {
    font-size: 18px;
}

.architect-layout {
    display: grid;
    grid-template-columns: 1fr minmax(440px, 36vw);
    gap: 40px;
    margin-top: 40px;
    align-items: start;
}

@media (max-width: 1100px) {
    .architect-layout {
        grid-template-columns: 1fr;
    }

    body.architect-page .radar-panel {
        max-width: 640px;
        margin-left: auto;
        margin-right: auto;
        width: 100%;
    }
}

body.architect-page .controls-panel,
body.architect-page .radar-panel {
    padding: 32px;
}

body.architect-page .panel-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}

.architect-page .prompt-section {
    margin-top: 40px;
}

.architect-page #prompt-content {
    min-height: 2em;
}

body.architect-page .prompt-display {
    padding: 24px;
}

body.architect-page .prompt-text {
    font-family: 'Monaco', 'Menlo', ui-monospace, monospace;
    font-size: 14px;
    line-height: 1.5;
    white-space: pre-wrap;
}

.architect-prompt-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
    align-items: center;
}

.architect-prompt-actions .copy-btn {
    margin-top: 0;
}

body.architect-page #all-slider-controls {
    max-height: calc(100vh - 260px);
    overflow-y: auto;
}

body.architect-page .copy-btn:hover {
    transform: translateY(-1px);
}

/* --- Origin story modal --- */
.origin-story-overlay {
    position: fixed !important;
    inset: 0 !important;
    z-index: 2100 !important;
    display: flex !important;
    align-items: flex-start !important;
    justify-content: center !important;
    padding: 72px 16px 24px !important;
    background: rgba(0, 0, 0, 0.55) !important;
}

.origin-story-dialog {
    border: 2px solid #000000 !important;
    border-radius: var(--vl-radius) !important;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25) !important;
    max-width: min(720px, 96vw) !important;
    width: 100% !important;
    padding: 28px 32px 32px !important;
    position: relative !important;
    max-height: calc(100vh - 96px) !important;
    overflow-y: auto !important;
    background: var(--at-surface) !important;
    text-align: left !important;
}

body.aituner-dark .origin-story-dialog {
    border-color: #ffffff !important;
}

.origin-story-title {
    font-size: 1.35rem !important;
    font-weight: var(--vl-font-weight-heading) !important;
    line-height: 1.25 !important;
    margin: 0 0 16px !important;
    color: var(--at-heading) !important;
}

.origin-story-body {
    margin-bottom: 16px !important;
}

.origin-story-body p {
    margin: 0 0 14px !important;
    line-height: 1.55 !important;
}

.origin-story-body p:last-child {
    margin-bottom: 0 !important;
}

.origin-story-dateline {
    margin: 0 0 12px !important;
    font-size: 0.8rem !important;
    font-weight: 600 !important;
    letter-spacing: 0.08em !important;
    text-transform: uppercase !important;
    color: var(--at-muted) !important;
}

.origin-story-prompt,
.origin-story-quote {
    margin: 14px 0 !important;
    padding: 12px 14px !important;
    border-left: 3px solid var(--at-border) !important;
    border-radius: 0 var(--vl-radius-tight) var(--vl-radius-tight) 0 !important;
    background: var(--at-surface-alt, rgba(0, 0, 0, 0.04)) !important;
    font-size: 12px !important;
    line-height: 1.5 !important;
    color: var(--at-text) !important;
}

.origin-story-prompt {
    font-family: ui-monospace, 'SF Mono', Menlo, Monaco, Consolas, monospace !important;
    max-height: 220px;
    overflow-y: auto;
}

.origin-story-quote {
    font-style: italic !important;
}

body.aituner-dark .origin-story-prompt,
body.aituner-dark .origin-story-quote {
    background: rgba(255, 255, 255, 0.05) !important;
    border-left-color: #ffffff !important;
}

/* --- Persistent app chrome (v4 header controls) --- */
body.has-aituner-chrome {
    padding-top: calc(var(--aituner-chrome-height, 56px) + env(safe-area-inset-top, 0px));
}

.aituner-chrome .tier-badge {
    position: static;
    top: auto;
    right: auto;
    z-index: auto;
    padding: 8px 16px;
    font-size: var(--vl-font-size-body);
    font-weight: var(--vl-font-weight-control);
    background: var(--at-surface) !important;
    color: var(--at-text) !important;
    border: var(--vl-border-width) solid var(--at-border) !important;
    border-radius: var(--vl-radius-control) !important;
    box-shadow: none !important;
}

body.aituner-dark .aituner-chrome .tier-badge {
    background: var(--at-surface) !important;
    color: #ffffff !important;
    border-color: #ffffff !important;
}

body.aituner-light .aituner-chrome .tier-badge {
    background: var(--at-surface) !important;
    color: #000000 !important;
    border-color: #000000 !important;
}

body.aituner-dark .aituner-chrome .tier-badge:hover {
    background: #333333 !important;
    color: #ffffff !important;
}

body.aituner-light .aituner-chrome .tier-badge:hover {
    background: #000000 !important;
    color: #ffffff !important;
}

.aituner-chrome {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: calc(10px + env(safe-area-inset-top, 0px)) 20px 10px;
    background: var(--at-page-bg);
    box-sizing: border-box;
}

.aituner-chrome-spacer {
    flex: 1;
}

.aituner-chrome-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

@media (max-width: 640px) {
    .aituner-chrome {
        gap: 10px;
        padding: calc(8px + env(safe-area-inset-top, 0px)) 12px 8px;
    }

    .aituner-chrome-actions {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 8px;
        max-width: 100%;
    }

    .aituner-chrome-actions::-webkit-scrollbar {
        display: none;
    }

    .aituner-chrome-btn {
        padding: 7px 12px;
        font-size: 13px;
        white-space: nowrap;
    }
}

a.aituner-chrome-home {
    display: inline-block;
    text-decoration: none !important;
    white-space: nowrap;
}

.aituner-chrome-btn {
    padding: 8px 16px;
    border: var(--vl-border-width) solid var(--at-border);
    border-radius: var(--vl-radius-control);
    background: var(--at-surface);
    color: var(--at-text);
    font-size: var(--vl-font-size-body);
    font-weight: var(--vl-font-weight-control);
    font-family: inherit;
    cursor: pointer;
    transition: background var(--vl-transition), color var(--vl-transition), border-color var(--vl-transition);
}

.aituner-chrome-btn:hover {
    background: var(--at-hover-surface);
    color: var(--at-accent-ink);
}

body.aituner-dark .aituner-chrome-btn:hover {
    background: #333333;
    color: #ffffff;
}

body.aituner-light .aituner-chrome-btn:hover {
    background: #000000;
    color: #ffffff;
}

.aituner-chrome-btn.aituner-chrome-btn-active {
    background: var(--at-accent) !important;
    color: var(--at-accent-ink) !important;
    border-color: var(--at-accent) !important;
}

.onboarding-top-bar {
    margin-bottom: 16px;
    text-align: left;
}

.onboarding-top-bar .view-back-btn {
    margin-bottom: 0;
}

/* --- Landing page (marketing index.html) --- */
body.landing-page {
    min-height: 100vh;
    margin: 0;
}

body.landing-page.has-aituner-chrome {
    padding-top: 56px;
}

/* v4 .container = 1400px; hero centered; dropdown spans that width */
.landing-main {
    width: 100%;
    box-sizing: border-box;
}

.landing-center {
    max-width: 52rem;
    margin: 0 auto;
    padding: clamp(24px, 5vw, 56px) clamp(20px, 4vw, 40px) 0;
    box-sizing: border-box;
}

.landing-wide {
    width: 100%;
    max-width: var(--vl-container-max);
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

@media (min-width: 1600px) {
    .landing-wide {
        max-width: var(--vl-container-wide);
        margin-left: 60px;
        margin-right: auto;
    }
}

.aituner-brand-block,
.landing-header-block {
    text-align: center;
    margin-bottom: clamp(28px, 5vw, 48px);
    padding-bottom: clamp(20px, 3vw, 32px);
    border-bottom: 2px solid var(--at-border);
}

.hero .aituner-brand-block {
    margin-bottom: 0;
}

.architect-container > .aituner-brand-block {
    margin-top: 0;
}

.landing-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;
}

/* v4 .quick-start-guide */
.landing-quick-start {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px 25px;
    margin: 20px auto 30px;
    max-width: 850px;
    background: var(--at-quick-start-bg);
    border: var(--vl-border-width-feature) solid var(--at-border);
    border-radius: var(--vl-radius);
    box-shadow: var(--at-card-shadow);
    box-sizing: border-box;
}

.landing-quick-start-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    flex: 1;
    text-align: center;
    min-width: 0;
}

.landing-quick-start-icon {
    width: 96px !important;
    height: 96px !important;
    min-width: 96px !important;
    min-height: 96px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 5px;
    color: var(--at-text);
}

.landing-quick-start-icon i,
.landing-quick-start-icon svg,
.landing-quick-start-icon i svg {
    width: 96px !important;
    height: 96px !important;
    min-width: 96px !important;
    min-height: 96px !important;
    max-width: 96px !important;
    max-height: 96px !important;
    stroke-width: 1.5 !important;
    stroke: currentColor !important;
    display: block !important;
}

.landing-quick-start-content h3 {
    margin: 0 0 5px;
    font-size: 1.3rem;
    font-weight: var(--vl-font-weight-emphasis);
    color: var(--at-heading);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.landing-quick-start-content p {
    margin: 0;
    font-size: var(--vl-font-size-body);
    color: var(--at-text-secondary);
    font-weight: var(--vl-font-weight-control);
}

.landing-quick-start-arrow {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 5px;
    flex-shrink: 0;
    color: var(--at-text);
}

.landing-quick-start-arrow i,
.landing-quick-start-arrow svg {
    width: 32px !important;
    height: 32px !important;
    stroke-width: 2.5 !important;
}

@media (max-width: 768px) {
    .landing-quick-start {
        flex-direction: column;
        gap: 15px;
        padding: 20px;
    }

    .landing-quick-start-arrow {
        transform: rotate(90deg);
        margin: 5px 0;
    }

    .landing-quick-start-icon,
    .landing-quick-start-icon i,
    .landing-quick-start-icon svg {
        width: 80px !important;
        height: 80px !important;
        min-width: 80px !important;
        min-height: 80px !important;
        max-width: 80px !important;
        max-height: 80px !important;
    }

    .landing-quick-start-content h3 {
        font-size: 1.1rem;
    }

    .landing-quick-start-content p {
        font-size: 0.85rem;
    }
}

.landing-cta-row {
    text-align: center;
    margin-bottom: clamp(28px, 5vw, 40px);
}

a.landing-cta.primary-btn {
    display: inline-block;
    text-decoration: none;
    padding: 12px 28px !important;
    font-size: 1rem !important;
}

/* v4 .app-info-section */
.landing-app-info {
    width: 100%;
    margin-top: 30px;
    margin-bottom: clamp(28px, 5vw, 40px);
    border: var(--vl-border-width) solid var(--at-border);
    border-radius: var(--vl-radius-tight);
    background: var(--at-surface);
    overflow: hidden;
    box-sizing: border-box;
}

.landing-app-info-toggle {
    list-style: none;
    cursor: pointer;
    padding: 15px 20px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--at-heading);
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    border-bottom: 2px solid transparent;
    transition: background var(--vl-transition);
}

.landing-app-info-toggle::-webkit-details-marker {
    display: none;
}

.landing-app-info-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
}

body.aituner-light.landing-page .landing-app-info-toggle:hover {
    background: #f5f5f5;
}

.landing-app-info[open] .landing-app-info-toggle {
    border-bottom-color: var(--at-border);
}

.landing-app-info-toggle-icon {
    font-size: 0.8rem;
    transition: transform var(--vl-transition);
    margin-left: 10px;
    color: var(--at-text-secondary);
}

.landing-app-info[open] .landing-app-info-toggle-icon {
    transform: rotate(180deg);
}

.landing-app-info-body {
    border-top: 1px solid var(--at-border-soft);
}

.landing-app-info-inner {
    padding: 25px;
    text-align: left;
}

.landing-app-info-inner h3 {
    margin: 0 0 15px;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--at-heading);
}

.landing-origin-story {
    margin: 0 0 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--at-border-soft);
}

.landing-origin-story .narrative-label {
    margin: 0 0 8px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--at-muted);
}

.landing-origin-story .origin-story-title {
    margin: 0 0 12px !important;
    font-size: 1.1rem !important;
    font-weight: 600 !important;
    line-height: 1.35 !important;
    color: var(--at-heading) !important;
}

.landing-origin-story .origin-story-body p {
    margin: 0 0 12px;
    line-height: 1.6;
    color: var(--at-text-secondary);
}

.landing-origin-story .origin-story-body p:last-child {
    margin-bottom: 0;
}

.landing-origin-story .narrative-signature {
    margin: 14px 0 0;
    font-size: 0.95rem;
    color: var(--at-muted);
}

.landing-origin-story .origin-story-prompt,
.landing-origin-story .origin-story-quote {
    font-size: 12px !important;
}

.landing-app-info-inner h4 {
    margin: 20px 0 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--at-heading);
}

.landing-app-info-inner p {
    margin: 0 0 15px;
    line-height: 1.6;
    color: var(--at-text-secondary);
}

.landing-app-info-inner ol,
.landing-app-info-inner ul {
    margin: 10px 0 15px;
    padding-left: 0;
    list-style: none;
}

.landing-app-info-inner li {
    margin: 12px 0;
    line-height: 1.6;
    color: var(--at-text-secondary);
}

.landing-app-info-steps {
    counter-reset: landing-step-counter;
    max-width: 700px;
    margin: 0 auto;
    text-align: left;
}

.landing-app-info-steps > li {
    position: relative;
    padding-left: 45px;
    counter-increment: landing-step-counter;
    margin-bottom: 15px;
    display: block;
}

.landing-app-info-steps > li > strong {
    display: block;
    margin-bottom: 5px;
    color: var(--at-heading);
}

.landing-app-info-steps > li::before {
    content: counter(landing-step-counter);
    position: absolute;
    left: 0;
    width: 32px;
    height: 32px;
    background: var(--at-accent);
    color: var(--at-page-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    top: 0;
}

.landing-app-info-substeps {
    margin-top: 10px;
    padding-left: 0;
    list-style: none;
}

.landing-app-info-substeps li {
    position: relative;
    padding-left: 25px;
    margin: 8px 0;
}

.landing-app-info-substeps li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--at-heading);
    font-weight: 700;
    font-size: 1.2rem;
    line-height: 1.6;
}

.landing-app-info-features li {
    position: relative;
    padding-left: 25px;
}

.landing-app-info-features li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--at-heading);
    font-weight: 700;
    font-size: 1.2rem;
    line-height: 1.6;
}

.landing-app-info-inner strong {
    color: var(--at-heading);
    font-weight: 600;
}

.landing-app-info-inner em {
    color: var(--at-muted);
    font-style: italic;
}

.landing-footer {
    text-align: center;
    font-size: 0.875rem;
    color: var(--at-muted);
    padding: 8px 0 clamp(24px, 5vw, 40px);
    border-top: 2px solid var(--at-border-soft);
    margin-top: 0;
}