/* Motus2 — dark theme (Dexora-inspired + Motus purple accent) */

html {
  scroll-behavior: smooth;
}

:root {
  --m2-bg: #000000;
  --m2-bg-alt: #000000;
  --m2-surface: #0a0a0a;
  --m2-surface-raised: #111111;
  --m2-ink: #f3f4f6;
  --m2-muted: #94a3b8;
  --m2-border: #2a2f3a;
  --m2-border-soft: #1e2430;
  --m2-accent: #a78bfa;
  --m2-accent-bright: #c4b5fd;
  --m2-accent-soft: rgba(124, 58, 237, 0.18);
  --m2-link: #93c5fd;
  --m2-link-hover: #bfdbfe;
  --m2-max-prose: 46rem;
  --m2-max-content: 56rem;
  --m2-max-wide: 75rem;
  --m2-gutter: clamp(1.25rem, 4.5vw, 2.75rem);
  --m2-section-pad-y: clamp(3.25rem, 7vw, 5rem);
  --m2-glow: rgba(139, 92, 246, 0.15);
}

body.motus2-dark {
  background: var(--m2-bg);
  color: var(--m2-ink);
  overflow-x: hidden;
}

/* Shared page width + horizontal rhythm (Dexora / Bulma-style) */
body.motus2-dark .nav-container,
.m2-wrap,
.motus2-hero__inner,
.m2-section .demo-container,
body.motus2-dark .footer .container,
body.motus2-dark .citation .container.m2-wrap {
  width: 100%;
  max-width: var(--m2-max-wide);
  margin-inline: auto;
  padding-inline: var(--m2-gutter);
  padding-left: max(var(--m2-gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--m2-gutter), env(safe-area-inset-right, 0px));
}

body.motus2-dark .nav-container {
  padding-top: 0;
  padding-bottom: 0;
}

/* motus_style section padding — use m2 rhythm instead */
body.motus2-dark section.m2-section,
body.motus2-dark section.demo {
  padding-block: var(--m2-section-pad-y);
  padding-inline: 0;
}

body.motus2-dark .citation.m2-section .section-title {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

/* ── Override motus_style.css for dark page ── */
body.motus2-dark .navbar {
  background: rgba(0, 0, 0, 0.95);
  border-bottom: 1px solid var(--m2-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

body.motus2-dark .nav-links a {
  color: #cbd5e1;
}

body.motus2-dark .nav-links a:hover,
body.motus2-dark .nav-links a.active {
  color: var(--m2-accent-bright);
}

body.motus2-dark .nav-links a::after {
  background: var(--m2-accent);
}

body.motus2-dark .section-title {
  color: var(--m2-ink);
}

body.motus2-dark .demo {
  background: transparent;
}

body.motus2-dark .demo-card {
  background: var(--m2-surface);
  border: 1px solid var(--m2-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

body.motus2-dark .demo-info h3 {
  color: var(--m2-ink);
}

body.motus2-dark .demo-info p {
  color: var(--m2-muted);
}

body.motus2-dark .demo-video {
  background: #000;
}

body.motus2-dark .citation {
  background: var(--m2-bg);
}

body.motus2-dark .citation-text {
  background: var(--m2-surface);
  border-left-color: var(--m2-accent);
}

body.motus2-dark .citation-text pre {
  color: #e2e8f0;
}

.citation-source {
  margin: 0 0 16px;
  color: var(--m2-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  text-align: center;
}

.citation-source a {
  color: var(--m2-link);
  font-weight: 600;
  text-decoration: none;
}

.citation-source a:hover {
  color: var(--m2-accent-bright);
  text-decoration: underline;
}

body.motus2-dark .footer {
  background: var(--m2-bg-alt);
  border-top: 1px solid var(--m2-border);
}

body.motus2-dark .footer-info p,
body.motus2-dark .footer-section h4 {
  color: #e2e8f0;
}

body.motus2-dark .footer-section a {
  color: var(--m2-link);
}

body.motus2-dark .footer-bottom p {
  color: #94a3b8;
}

body.motus2-dark .hero-authors {
  color: var(--m2-ink);
}

body.motus2-dark .hero-authors a {
  color: var(--m2-link);
}

/* ── Nav ── */
.navbar--motus2 {
  padding: 14px 0;
}

.nav-wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--m2-ink);
  line-height: 1;
}

.nav-wordmark span {
  font-size: 1em;
  font-weight: 700;
  color: var(--m2-accent-bright);
}

.nav-links {
  gap: 22px;
}

.nav-links a {
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
}

/* ── Hero ── */
.motus2-hero {
  position: relative;
  padding: clamp(5.5rem, 11vw, 7rem) 0 clamp(2.75rem, 6vw, 4.5rem);
  background: var(--m2-bg);
  color: var(--m2-ink);
  border-bottom: 1px solid var(--m2-border);
}

.motus2-hero__inner {
  box-sizing: border-box;
  text-align: center;
}

.motus2-hero__logo {
  display: inline-block;
  margin-bottom: 32px;
  padding: 12px 20px;
  background: #ffffff;
  border-radius: 12px;
  line-height: 0;
}

.motus2-hero__logo img {
  height: 44px;
  width: auto;
  display: block;
}

.motus2-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px 18px;
  margin-bottom: 28px;
  font-size: 0.88rem;
  color: var(--m2-muted);
}

.motus2-hero__meta-tag {
  font-weight: 600;
  color: var(--m2-accent-bright);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
}

.motus2-hero__meta-tag--open {
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid rgba(96, 165, 250, 0.45);
  background: rgba(59, 130, 246, 0.12);
  color: #93c5fd;
}

.motus2-hero__author-block {
  position: relative;
  left: 50%;
  width: min(76rem, calc(100vw - 1rem));
  transform: translateX(-50%);
}

.motus2-hero__authors {
  margin: 0 auto 8px;
  max-width: 100%;
  font-size: clamp(0.86rem, 2.5vw, 0.91rem);
  line-height: 1.8;
  text-align: center;
}

.motus2-author-name {
  color: var(--m2-link);
  white-space: nowrap;
}

.motus2-hero__authors a {
  color: var(--m2-link);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.motus2-hero__authors a:hover {
  color: var(--m2-link-hover);
  text-decoration: underline;
}

.motus2-hero__authors sup {
  margin-left: 1px;
  font-size: 0.75em;
  color: var(--m2-muted);
}

.motus2-hero__affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 22px;
  margin: 0 auto 7px;
  color: var(--m2-ink);
  font-size: 0.94rem;
  line-height: 1.6;
}

.motus2-hero__affiliations sup {
  margin-right: 2px;
  color: var(--m2-muted);
  font-size: 0.75em;
}

.motus2-hero__author-note {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 5px 18px;
  margin: 0 auto 24px;
  font-size: 0.88rem;
  color: var(--m2-muted);
  text-align: center;
}

.motus2-hero__author-note sup {
  margin-right: 2px;
}

.motus2-hero__display {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 0 0 14px;
  background: linear-gradient(135deg, #c4b5fd 0%, #8b5cf6 45%, #60a5fa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.motus2-hero__title {
  font-size: clamp(1.2rem, 2.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 auto 20px;
  letter-spacing: -0.02em;
  max-width: none;
  white-space: nowrap;
  color: var(--m2-ink);
}

@media (max-width: 900px) {
  .motus2-hero__title {
    max-width: min(820px, 100%);
    white-space: normal;
  }
}

.motus2-hero__lede {
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  line-height: 1.65;
  color: #cbd5e1;
  max-width: min(58rem, 100%);
  margin: 0 auto 36px;
  text-align: left;
  text-indent: 2em;
}

.motus2-hero__lede strong {
  color: var(--m2-ink);
  font-weight: 900;
}

.motus2-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 7px 9px;
  margin: 0 auto 36px;
  max-width: min(56rem, 100%);
}

.motus2-formula__term {
  padding: 7px 13px;
  border-radius: 8px;
  background: var(--m2-accent-soft);
  border: 1px solid rgba(167, 139, 250, 0.35);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--m2-accent-bright);
}

.motus2-formula__op {
  color: #64748b;
  font-weight: 700;
  font-size: 0.9rem;
}

.motus2-formula__result {
  padding: 7px 14px;
  border-radius: 8px;
  background: #f3f4f6;
  color: #111827;
  font-size: 0.88rem;
  font-weight: 700;
}

/* TL;DR box */
.motus2-tldr {
  max-width: min(var(--m2-max-content), 100%);
  margin: 0 auto 36px;
  padding: clamp(1.1rem, 3vw, 1.75rem) clamp(1.15rem, 3.5vw, 1.85rem);
  border-radius: 12px;
  background: var(--m2-surface);
  border: 1px solid var(--m2-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  scroll-margin-top: 100px;
  text-align: left;
}

.motus2-tldr__heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--m2-ink);
}

.motus2-tldr__heading i {
  color: var(--m2-accent-bright);
}

.motus2-tldr ul {
  margin: 0;
  padding-left: 1.25rem;
  line-height: 1.75;
  color: #cbd5e1;
}

.motus2-tldr li {
  margin-bottom: 8px;
}

.motus2-tldr li:last-child {
  margin-bottom: 0;
}

.motus2-tldr strong {
  color: var(--m2-ink);
}

/* Dexora-style glass buttons */
.motus2-hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 32px;
}

.motus2-hero__actions .external-link.button {
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.06);
  color: #fff !important;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.motus2-hero__actions .button--soon {
  cursor: default;
  pointer-events: none;
}

.motus2-hero__actions .external-link.button:hover {
  background: rgba(255, 255, 255, 0.95);
  color: #111827 !important;
  border-color: rgba(255, 255, 255, 0.95);
  transform: translateY(-2px);
}

.motus2-overview-video {
  width: min(51.2rem, 100%);
  margin: 0 auto clamp(2rem, 5vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--m2-border);
  border-radius: clamp(10px, 1.6vw, 16px);
  background: #000;
  box-shadow: 0 22px 64px rgba(0, 0, 0, 0.48);
  scroll-margin-top: 96px;
  line-height: 0;
}

.motus2-overview-video video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #000;
}

.demo-task-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.demo-task-chip {
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--m2-border);
  font-size: 0.8rem;
  font-weight: 500;
  color: #cbd5e1;
}

/* Hero media strip */
.motus2-hero__media-strip {
  width: min(640px, 50%);
  margin: 48px auto 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--m2-border);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
  background: #000;
  aspect-ratio: 16 / 9;
  min-height: 0;
}

.motus2-hero__media-strip img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  object-position: center 35%;
  display: block;
}

@media (max-width: 768px) {
  .motus2-hero__media-strip {
    width: 100%;
  }
}

/* ── Editorial sections ── */
.m2-section {
  padding-block: var(--m2-section-pad-y);
  scroll-margin-top: 88px;
  background: var(--m2-bg);
}

.m2-section--alt {
  background: var(--m2-bg-alt);
  border-top: 1px solid var(--m2-border-soft);
  border-bottom: 1px solid var(--m2-border-soft);
}

.m2-wrap {
  box-sizing: border-box;
}

.m2-section__label--center {
  text-align: center;
}

.m2-demo-lead {
  text-align: center;
  max-width: min(var(--m2-max-prose), 100%);
  margin: -1.5rem auto clamp(1.75rem, 4vw, 2.5rem);
  padding-inline: 0.25rem;
  color: var(--m2-muted);
  line-height: 1.7;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
}

.m2-demo-title {
  margin-bottom: clamp(1rem, 3vw, 1.5rem) !important;
}

.m2-split--spaced {
  margin-top: clamp(2rem, 5vw, 3rem);
}

.m2-figure--flush {
  margin: 0;
}

.m2-wrap--citation {
  max-width: min(var(--m2-max-content), 100%);
}

.m2-section__label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--m2-accent-bright);
  margin-bottom: 12px;
}

.m2-section__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin: 0 0 20px;
  color: var(--m2-ink);
}

.m2-prose {
  max-width: 100%;
  line-height: 1.8;
  color: #cbd5e1;
  font-size: clamp(0.98rem, 1.5vw, 1.05rem);
}

.m2-prose p {
  margin: 0 0 1.25rem;
}

.m2-prose p:last-child {
  margin-bottom: 0;
}

.m2-prose strong {
  color: var(--m2-ink);
  font-weight: 600;
}

.m2-prose a,
.role-card h3 a,
.footer-info a,
.footer-bottom a {
  color: var(--m2-link);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.m2-prose a:hover,
.role-card h3 a:hover,
.footer-info a:hover,
.footer-bottom a:hover {
  color: var(--m2-link-hover);
}

.m2-prose h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--m2-ink);
  margin: 2rem 0 0.75rem;
}

.m2-prose h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--m2-ink);
  margin: 1.75rem 0 0.65rem;
}

.m2-tts-list {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  line-height: 1.75;
}

.m2-tts-list li {
  margin-bottom: 0.6rem;
}

.m2-tts-list li:last-child {
  margin-bottom: 0;
}

.m2-prose ul {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}

.m2-prose li {
  margin-bottom: 0.5rem;
}

/* Figures */
.m2-figure {
  margin: 40px 0 0;
  text-align: center;
}

.m2-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
  border-radius: clamp(8px, 1.5vw, 12px);
  border: 1px solid var(--m2-border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

/* Architecture figure */
.m2-figure--architecture img {
  max-width: 85%;
}

/* Smaller figure (e.g. data pyramid) */
.m2-figure--sm img {
  max-width: min(780px, 100%);
}

/* Half-width figure (e.g. model-based RL / planning) */
.m2-figure--half img {
  max-width: min(660px, 100%);
}

/* Large but contained figure (e.g. scaling laws) */
.m2-figure--lg img {
  max-width: min(900px, 100%);
}

.m2-figure__caption {
  max-width: min(var(--m2-max-content), 100%);
  margin: 16px auto 0;
  padding-inline: 0;
  font-size: clamp(0.86rem, 1.4vw, 0.92rem);
  line-height: 1.65;
  color: var(--m2-muted);
  text-align: center;
}

.m2-figure__caption strong {
  color: var(--m2-ink);
}

.value-gif-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.5rem);
  align-items: start;
  margin-top: 32px;
}

.value-gif-task {
  min-width: 0;
  padding: clamp(0.8rem, 2vw, 1rem);
  border: 1px solid var(--m2-border);
  border-radius: 12px;
  background: var(--m2-surface);
}

.value-gif-task h4 {
  margin: 0 0 12px;
  color: var(--m2-ink);
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
}

.value-gif-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.value-gif-pair img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: #fff;
}

.value-static-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.5rem);
  align-items: start;
  margin-top: 32px;
}

.value-static-figure {
  margin: 0;
}

.value-static-figure img {
  background: #fff;
}

.m2-callout {
  display: block;
  width: fit-content;
  margin: 16px auto 0;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--m2-accent-soft);
  border: 1px solid rgba(167, 139, 250, 0.35);
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.88rem;
  color: var(--m2-accent-bright);
  text-align: center;
}

/* Model pills */
.model-pills {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.model-pill {
  flex: 1 1 auto;
  min-width: min(100%, 12rem);
  max-width: 100%;
  padding: 12px clamp(14px, 2.5vw, 18px);
  border-radius: 10px;
  background: var(--m2-surface);
  border: 1px solid var(--m2-border);
  font-size: clamp(0.86rem, 1.5vw, 0.92rem);
  font-weight: 600;
  color: var(--m2-ink);
}

.model-pill span {
  display: block;
  font-size: clamp(0.72rem, 1.2vw, 0.78rem);
  font-weight: 500;
  color: var(--m2-muted);
  margin-top: 4px;
  line-height: 1.45;
  word-break: break-word;
}

.m2-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  margin-top: 32px;
}

@media (max-width: 900px) {
  .m2-split {
    grid-template-columns: 1fr;
    gap: clamp(1.25rem, 4vw, 2rem);
  }
}

/* Loop steps */
.loop-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 32px;
}

@media (max-width: 768px) {
  .loop-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

.loop-step {
  padding: 20px 16px;
  border-radius: 12px;
  background: var(--m2-surface);
  border: 1px solid var(--m2-border);
  text-align: center;
}

.loop-step__num {
  width: 30px;
  height: 30px;
  margin: 0 auto 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, #7c3aed 0%, #60a5fa 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.loop-step h4 {
  margin: 0 0 6px;
  font-size: 0.92rem;
  color: var(--m2-ink);
}

.loop-step p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--m2-muted);
  line-height: 1.45;
}

/* Ablation bars */
.ablation-bar {
  margin: 14px 0;
}

.ablation-bar__label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--m2-ink);
}

.ablation-bar__track {
  height: 10px;
  border-radius: 999px;
  background: #1e2430;
  overflow: hidden;
}

.ablation-bar__fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #7c3aed 0%, #60a5fa 100%);
}

/* Hardware cards */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.35rem);
  margin-top: clamp(1.5rem, 4vw, 2rem);
}

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

.hardware-card {
  background: var(--m2-surface);
  border-radius: 12px;
  border: 1px solid var(--m2-border);
  overflow: hidden;
}

.hardware-card__header {
  padding: 14px 18px;
  background: linear-gradient(135deg, #5b21b6 0%, #2563eb 100%);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}

.hardware-card__body {
  padding: 18px;
}

.hardware-card__body ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.75;
  color: var(--m2-muted);
  font-size: 0.92rem;
}

/* Acknowledgments */
.ack-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

@media (max-width: 640px) {
  .ack-grid {
    grid-template-columns: 1fr;
  }
}

.ack-block {
  padding: 22px;
  border-radius: 12px;
  background: var(--m2-surface);
  border: 1px solid var(--m2-border);
}

.ack-block h3 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  color: var(--m2-accent-bright);
}

.ack-block p {
  margin: 0;
  line-height: 1.75;
  color: var(--m2-muted);
  font-size: 0.92rem;
}

/* Placeholders */
.media-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #000000 0%, #0a0a0a 100%);
  color: #64748b;
  text-align: center;
  padding: 32px 24px;
  gap: 10px;
}

.media-placeholder--light {
  background: linear-gradient(135deg, #000000 0%, #0a0a0a 100%);
  color: #64748b;
  border: 2px dashed var(--m2-border);
  border-radius: 0;
  min-height: 200px;
}

.media-placeholder__icon {
  font-size: 1.75rem;
  opacity: 0.55;
  color: var(--m2-accent);
}

.media-placeholder--hero {
  min-height: 100%;
  gap: 14px;
}

.media-placeholder__soon {
  display: inline-block;
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(96, 165, 250, 0.45);
  background: rgba(59, 130, 246, 0.12);
  color: #93c5fd;
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.media-placeholder__label {
  font-size: 0.88rem;
  font-weight: 600;
  color: #94a3b8;
}

.media-placeholder__hint {
  font-size: 0.8rem;
  max-width: 340px;
  line-height: 1.5;
  opacity: 0.85;
  color: #64748b;
}

/* Demo section */
.m2-section .demo-container {
  box-sizing: border-box;
}

body.motus2-dark .demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17.5rem), 1fr));
  gap: clamp(1.15rem, 3vw, 2.25rem);
  margin-top: 8px;
}

body.motus2-dark .demo-grid--2x2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 720px;
  margin-inline: auto;
}

@media (max-width: 560px) {
  body.motus2-dark .demo-grid--2x2 {
    grid-template-columns: 1fr;
    max-width: 360px;
  }
}

/* Tactile viz — same width as the 2×2 demo row */
.demo-tactile {
  width: 100%;
  max-width: 720px;
  margin-inline: auto;
  margin-top: clamp(1.15rem, 3vw, 2.25rem);
}

@media (max-width: 560px) {
  .demo-tactile {
    max-width: 360px;
  }
}

.demo-card--tactile {
  width: 100%;
}

/* Post-training mode attention masks — three side by side */
.m2-mask-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.75rem, 2vw, 1.25rem);
  margin-top: 28px;
  align-items: start;
}

@media (max-width: 768px) {
  .m2-mask-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-inline: auto;
  }
}

.m2-mask {
  margin: 0;
  text-align: center;
}

.m2-mask img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--m2-border);
  background: #fff;
  padding: 8px;
  box-sizing: border-box;
}

.m2-mask figcaption {
  margin-top: 10px;
  font-size: clamp(0.78rem, 1.3vw, 0.86rem);
  line-height: 1.5;
  color: var(--m2-muted);
}

.m2-mask figcaption strong {
  color: var(--m2-ink);
}

/* Author team */
.team-group {
  position: relative;
  left: 50%;
  width: min(76rem, calc(100vw - 1rem));
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  max-width: none;
  transform: translateX(-50%);
}

.team-group__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--m2-accent-bright);
  margin: 0 0 6px;
}

.team-group__note {
  margin: 0 0 12px;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--m2-muted);
}

.team-group__plain {
  margin: 0;
  line-height: 1.8;
  color: #cbd5e1;
  font-size: clamp(0.95rem, 1.5vw, 1.02rem);
}

.team-list {
  margin: 0;
  padding-left: 1.25rem;
  line-height: 1.85;
  color: #cbd5e1;
  font-size: clamp(0.9rem, 1.35vw, 0.98rem);
}

.team-list li {
  margin-bottom: 6px;
}

.team-name {
  font-weight: 600;
  color: var(--m2-ink);
}

.m2-section .section-title {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  margin-bottom: clamp(0.75rem, 2vw, 1rem);
  color: var(--m2-ink);
  padding-inline: 0.25rem;
}

.m2-section .demo-container .m2-section__label {
  margin-bottom: clamp(0.5rem, 2vw, 0.75rem);
}

/* Results cards */
.m2-results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 36px;
}

@media (max-width: 860px) {
  .m2-results-grid {
    grid-template-columns: 1fr;
  }
}

.m2-result-card {
  background: var(--m2-surface);
  border: 1px solid var(--m2-border);
  border-radius: 12px;
  overflow: hidden;
}

.m2-result-card__head {
  padding: 16px 20px;
  background: linear-gradient(135deg, #5b21b6 0%, #2563eb 100%);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}

.m2-result-card__body {
  padding: 20px;
}

.m2-result-card table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.m2-result-card th,
.m2-result-card td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--m2-border);
}

.m2-result-card th {
  background: var(--m2-surface-raised);
  font-weight: 600;
  color: var(--m2-ink);
}

.m2-result-card td {
  color: var(--m2-muted);
}

/* Hardware photos */
.m2-hardware-photos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 3vw, 1.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

@media (max-width: 768px) {
  .m2-hardware-photos {
    grid-template-columns: 1fr;
  }
}

.m2-figure--compact {
  margin: 0;
}

.m2-figure--compact img {
  max-height: 420px;
  object-fit: cover;
  object-position: center top;
}

.demo-video img,
.demo-video video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: contain;
  object-position: center center;
  background: #000;
}

/* Tactile viz: landscape native ratio (override 9:16 demo default) */
body.motus2-dark .demo-video--tactile video {
  aspect-ratio: 1280 / 416;
  height: auto;
  object-fit: contain;
}

/* Subsection title from motus_style if used */
body.motus2-dark .subsection-title {
  background: var(--m2-surface);
  border-left-color: var(--m2-accent);
  color: var(--m2-ink);
  box-shadow: none;
}

/* ── Responsive polish ── */
@media (max-width: 640px) {
  .navbar--motus2 {
    padding: 10px 0;
  }

  .motus2-hero__logo {
    margin-bottom: 24px;
    padding: 10px 16px;
  }

  .motus2-hero__logo img {
    height: 36px;
  }

  .motus2-hero__display {
    font-size: clamp(2rem, 10vw, 2.75rem);
    letter-spacing: -0.02em;
  }

  .motus2-formula__term,
  .motus2-formula__result {
    font-size: 0.8rem;
    padding: 6px 10px;
  }

  .motus2-hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .motus2-hero__actions .external-link.button {
    width: 100%;
    justify-content: center;
  }

  .model-pill {
    flex: 1 1 100%;
    min-width: 100%;
    max-width: 100%;
  }

  .loop-steps {
    grid-template-columns: 1fr;
  }

  .motus2-hero__media-strip {
    margin-top: clamp(1.5rem, 5vw, 3rem);
    min-height: 200px;
  }
}

@media (min-width: 1280px) {
  :root {
    --m2-gutter: clamp(2rem, 3vw, 3.25rem);
  }
}

@media (min-width: 1600px) {
  :root {
    --m2-max-wide: 80rem;
  }
}

/* ── Motus2 paper-site refresh ── */
.motus2-hero__logo {
  margin-bottom: 24px;
  padding: 11px 18px;
}

.motus2-hero__logo img {
  height: clamp(40px, 4vw, 46px);
}

.motus2-hero__lede {
  max-width: min(56rem, 100%);
  text-align: left;
  text-indent: 0;
}

.m2-section--alt {
  background: #050505;
}

.m2-prose {
  max-width: 100%;
  margin-inline: 0;
}

.demo-explorer {
  max-width: 1060px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--m2-border);
  border-radius: 18px;
  background: var(--m2-surface);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
}

.demo-filter-row {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px solid var(--m2-border-soft);
}

.demo-filter-row--tasks {
  border-bottom: 0;
  padding-bottom: 18px;
}

.demo-filter-label {
  padding-top: 7px;
  color: #e2e8f0;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.demo-filter-buttons,
.demo-task-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.demo-filter,
.demo-task-button {
  appearance: none;
  border: 1px solid var(--m2-border);
  border-radius: 999px;
  background: #0b0b0c;
  color: #cbd5e1;
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 8px 13px;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.demo-filter:hover,
.demo-task-button:hover {
  border-color: rgba(167, 139, 250, 0.75);
  color: #fff;
  transform: translateY(-1px);
}

.demo-filter.is-active,
.demo-task-button.is-active {
  border-color: #a78bfa;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.8), rgba(37, 99, 235, 0.72));
  color: #fff;
}

.demo-filter:focus-visible,
.demo-task-button:focus-visible {
  outline: 2px solid #c4b5fd;
  outline-offset: 2px;
}

.demo-player-panel {
  display: grid;
  grid-template-columns: minmax(0, 335px) minmax(220px, 260px);
  width: min(595px, 100%);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--m2-border);
  border-radius: 14px;
  background: #0d0f15;
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.38);
}

.demo-player-shell {
  display: flex;
  flex-direction: column;
  width: 100%;
  background: #000;
}

.demo-player-media {
  width: 100%;
  aspect-ratio: 9 / 16;
  overflow: hidden;
  background: #000;
}

.demo-player-panel.is-landscape {
  grid-template-columns: minmax(0, 720px) minmax(220px, 260px);
  width: min(980px, 100%);
}

.demo-player-panel.is-landscape .demo-player-media {
  aspect-ratio: 16 / 9;
}

.demo-player-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.demo-player-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(8, 10, 16, 0.96);
}

.demo-player-btn {
  appearance: none;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(167, 139, 250, 0.35);
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.18);
  color: #e9d5ff;
  cursor: pointer;
  font-size: 0.82rem;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.demo-player-btn:hover {
  border-color: rgba(196, 181, 253, 0.75);
  background: rgba(124, 58, 237, 0.34);
  transform: translateY(-1px);
}

.demo-player-btn:focus-visible {
  outline: 2px solid #c4b5fd;
  outline-offset: 2px;
}

.m2-symbol {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-style: normal;
  font-weight: 700;
  line-height: 1;
}

.demo-player-seek {
  flex: 1 1 auto;
  min-width: 0;
  height: 6px;
  margin: 0;
  accent-color: #a78bfa;
  cursor: pointer;
}

.demo-player-time {
  flex: 0 0 auto;
  min-width: 84px;
  color: #cbd5e1;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

.demo-player-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
  border-left: 1px solid rgba(167, 139, 250, 0.2);
  background:
    radial-gradient(circle at 18% 18%, rgba(124, 58, 237, 0.18), transparent 45%),
    linear-gradient(155deg, #171923 0%, #11131a 58%, #0c0e13 100%);
  text-align: left;
}

.demo-player-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 7px;
  margin-bottom: 14px;
}

.demo-player-tags span {
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--m2-accent-soft);
  border: 1px solid rgba(167, 139, 250, 0.32);
  color: var(--m2-accent-bright);
  font-size: 0.72rem;
  font-weight: 700;
}

.demo-player-tags .demo-runtime-tag {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(74, 222, 128, 0.35);
  color: #86efac;
}

.demo-player-copy h3 {
  margin: 0 0 10px;
  color: #fff;
  font-size: clamp(1.2rem, 2.4vw, 1.65rem);
  line-height: 1.2;
}

.demo-player-copy p {
  margin: 0;
  color: var(--m2-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.role-grid,
.context-grid,
.tactile-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.role-card,
.context-grid article,
.tactile-steps article {
  padding: 20px;
  border: 1px solid var(--m2-border);
  border-radius: 12px;
  background: var(--m2-surface);
}

.role-card > span,
.tactile-steps article > span {
  color: var(--m2-accent-bright);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.role-card h3,
.tactile-steps h3 {
  margin: 10px 0 7px;
  color: #fff;
  font-size: 1rem;
}

.role-card p,
.tactile-steps p {
  margin: 0;
  color: var(--m2-muted);
  font-size: 0.86rem;
  line-height: 1.55;
}

.context-grid article {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.context-grid strong {
  color: #fff;
  font-size: 0.95rem;
}

.context-grid span {
  color: var(--m2-muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.tactile-steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.mask-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 4vw, 2.75rem);
  width: min(850px, 100%);
  margin: 34px auto 0;
}

.mask-pair .m2-mask img {
  max-height: 620px;
  object-fit: contain;
}

.m2-figure__caption--standalone {
  margin-top: 18px;
}

.platform-gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.platform-gallery figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--m2-border);
  border-radius: 12px;
  background: var(--m2-surface);
}

.platform-gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
}

.platform-gallery figcaption {
  padding: 12px;
  color: var(--m2-muted);
  font-size: 0.8rem;
  line-height: 1.45;
}

.platform-gallery figcaption strong {
  color: #fff;
}

.author-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.author-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 66px;
  padding: 14px;
  border: 1px solid var(--m2-border);
  border-radius: 10px;
  background: var(--m2-surface);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 650;
  text-align: center;
  text-decoration: none;
}

a.author-card:hover {
  border-color: rgba(167, 139, 250, 0.72);
  color: var(--m2-accent-bright);
}

.author-card sup {
  color: var(--m2-accent-bright);
}

.author-note {
  margin: 14px 0 0;
  color: var(--m2-muted);
  font-size: 0.82rem;
  text-align: center;
}

@media (max-width: 920px) {
  .role-grid,
  .context-grid {
    grid-template-columns: 1fr;
  }

  .tactile-steps,
  .platform-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  .demo-player-panel {
    display: flex;
    flex-direction: column;
    width: min(340px, 100%);
  }

  .demo-player-panel.is-landscape {
    width: 100%;
  }

  .demo-player-copy {
    align-items: center;
    border-top: 1px solid var(--m2-border);
    border-left: 0;
    text-align: center;
  }

  .demo-player-tags {
    justify-content: center;
  }

  .demo-filter-row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .demo-filter-label {
    padding-top: 0;
  }

  .mask-pair,
  .value-gif-grid,
  .value-static-grid,
  .tactile-steps,
  .platform-gallery,
  .author-grid {
    grid-template-columns: 1fr;
  }

  .value-gif-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

/* ── Crawlable demo catalog ── */
.motus2-overview-video__caption {
  padding: 0.8rem 1rem 0.9rem;
  border-top: 1px solid var(--m2-border);
  background: var(--m2-surface);
  color: var(--m2-muted);
  font-size: 0.86rem;
  line-height: 1.55;
  text-align: left;
}

.motus2-overview-video__caption strong {
  color: var(--m2-ink);
}

.m2-demo-lead a {
  color: var(--m2-link);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.motus2-hero--catalog {
  padding-bottom: clamp(3rem, 7vw, 4.5rem);
}

.motus2-hero--catalog .motus2-hero__lede + .motus2-hero__lede {
  margin-top: 1rem;
  color: #b9c5d6;
}

.demo-watch-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(18rem, 0.8fr);
  gap: clamp(1.25rem, 4vw, 2.5rem);
  align-items: center;
}

.demo-watch-player {
  overflow: hidden;
  border: 1px solid var(--m2-border);
  border-radius: 14px;
  background: #000;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.38);
}

.demo-watch-player video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #000;
}

.demo-watch-copy {
  color: #cbd5e1;
  line-height: 1.7;
}

.demo-watch-copy > p:first-child {
  margin-top: 0;
  color: var(--m2-ink);
  font-size: 1.03rem;
}

.demo-watch-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 1.1rem 0;
}

.demo-watch-meta div {
  padding: 10px 12px;
  border: 1px solid var(--m2-border);
  border-radius: 9px;
  background: var(--m2-surface);
}

.demo-watch-meta dt {
  color: var(--m2-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.demo-watch-meta dd {
  margin: 3px 0 0;
  color: var(--m2-ink);
  font-size: 0.88rem;
  font-weight: 650;
}

.demo-visible-timeline {
  margin-top: 1rem;
}

.demo-visible-timeline h3 {
  margin: 0 0 0.5rem;
  color: var(--m2-ink);
  font-size: 0.95rem;
}

.demo-visible-timeline ol {
  margin: 0;
  padding-left: 1.2rem;
  color: #cbd5e1;
  font-size: 0.86rem;
}

.demo-evidence-note {
  margin-bottom: 0;
  color: var(--m2-muted);
  font-size: 0.82rem;
}

.demo-catalog-lede {
  max-width: var(--m2-max-prose);
  margin: -0.45rem 0 1.75rem;
  color: var(--m2-muted);
  line-height: 1.7;
}

.demo-catalog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.demo-catalog-card {
  padding: clamp(1rem, 2.5vw, 1.35rem);
  border: 1px solid var(--m2-border);
  border-radius: 12px;
  background: var(--m2-surface);
  scroll-margin-top: 96px;
}

.demo-catalog-card:target {
  border-color: var(--m2-accent-bright);
  box-shadow: 0 0 0 3px var(--m2-accent-soft);
}

.demo-catalog-card h3 {
  margin: 0.75rem 0 0.55rem;
  color: var(--m2-ink);
  font-size: 1.05rem;
}

.demo-catalog-card p {
  margin: 0;
  color: #cbd5e1;
  line-height: 1.6;
}

.demo-catalog-badges,
.demo-rollout-links {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.demo-catalog-badges span {
  padding: 4px 8px;
  border: 1px solid rgba(167, 139, 250, 0.38);
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.12);
  color: #ddd6fe;
  font-size: 0.7rem;
  font-weight: 700;
}

.demo-rollout-links {
  align-items: center;
  margin-top: 1rem;
}

.demo-watch-button,
.demo-rollout-links a {
  appearance: none;
  padding: 7px 10px;
  border: 1px solid var(--m2-border);
  border-radius: 8px;
  background: #0b0b0c;
  color: var(--m2-link);
  cursor: pointer;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
}

.demo-watch-button:hover,
.demo-rollout-links a:hover {
  border-color: rgba(167, 139, 250, 0.75);
  color: #fff;
}

.demo-watch-button[aria-pressed="true"] {
  border-color: var(--m2-accent-bright);
  background: var(--m2-accent-soft);
  color: #fff;
}

.demo-watch-button:focus-visible,
.demo-rollout-links a:focus-visible {
  outline: 2px solid var(--m2-accent-bright);
  outline-offset: 2px;
}

@media (max-width: 860px) {
  .demo-watch-grid,
  .demo-catalog-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .demo-watch-meta {
    grid-template-columns: 1fr;
  }
}