:root {
  --bg: #f3efe8;
  --panel: #f8f5ef;
  --panel-strong: #f1ece3;
  --ink: #111111;
  --muted: #5e5a55;
  --line: #d7d0c4;
  --line-strong: #b8aea0;
  --accent: #a24a2d;
  --mono: "IBM Plex Mono", monospace;
  --sans: "IBM Plex Sans", sans-serif;
  --width: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  overflow-wrap: break-word;
  word-break: break-word;
}

a {
  color: inherit;
}

img,
video {
  display: block;
  max-width: 100%;
}

.site-header,
.page,
.site-footer,
.docs-shell {
  width: min(calc(100% - 2rem), var(--width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.88rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}

.brand-text strong {
  font-size: 0.98rem;
}

.brand-text span,
.site-nav a,
.masthead-summary,
.section-heading p,
.task-card-subtitle,
.task-card-summary,
.featured-summary,
.featured-note,
.slot-path,
.slot-note,
.docs-intro,
.docs-card p,
.repo-item p,
.step-card p,
.link-list span,
.checklist li,
.docs-note span,
.media-summary {
  color: var(--muted);
}

.site-nav {
  display: inline-flex;
  gap: 1.2rem;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  position: relative;
  padding: 0.3rem 0;
  color: var(--muted);
  transition: color 0.15s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.site-nav a:hover {
  color: var(--accent);
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.page {
  padding: 2.2rem 0 5rem;
}

.eyebrow,
.section-label,
.slot-label,
.featured-label,
.docs-nav-title,
.model-hook,
.step-index,
.route-label,
.metric-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.masthead {
  max-width: none;
  padding: 1rem 0 1.4rem;
}

.masthead-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 1rem;
  padding: 0;
}

.masthead-meta-left {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.masthead-meta-sep {
  color: var(--line-strong, var(--muted));
}

.masthead-meta-lab {
  color: var(--accent);
  text-decoration: none;
}

.masthead-meta-lab:hover {
  border-bottom: 1px solid var(--accent);
}

.masthead h1,
.section-heading h2,
.media-intro h1,
.docs-section h1,
.docs-section h2 {
  margin: 0;
  font-size: clamp(2.3rem, 6vw, 4.3rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 700;
}

.section-heading h2,
.docs-section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

.masthead-summary,
.media-summary,
.docs-intro {
  max-width: none;
  margin: 0.7rem 0 0;
  line-height: 1.7;
  font-size: 1.02rem;
}

.masthead-summary a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
}

.masthead-authors {
  margin: 1.2rem 0 0;
  font-size: 1.05rem;
  font-weight: 500;
}

.masthead-authors sup {
  color: var(--muted);
}

.masthead-equal-contrib {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.masthead-equal-contrib sup {
  color: var(--muted);
}

.masthead-logo {
  display: block;
  height: 140px;
  width: auto;
  margin: 0.35rem 0 -1rem -18px;
}

@media (max-width: 720px) {
  .masthead-logo {
    height: 100px;
  }
}

.masthead-affiliation {
  margin: 0.25rem 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.masthead-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0 1rem;
  border: 1px solid var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  background: transparent;
  color: var(--ink);
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
  background: var(--ink);
  color: var(--bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.button:active {
  transform: translateY(0);
  box-shadow: none;
}

.button-primary {
  background: var(--panel);
  color: var(--ink);
  border: 2px solid var(--accent);
}

.button-primary:hover {
  background: transparent;
  color: var(--ink);
}

.metric-grid {
  display: grid;
  gap: 0.8rem;
}

.metric-card,
.featured-panel,
.task-card,
.route-card,
.media-overview,
.media-task-card,
.docs-card,
.docs-note,
.repo-item,
.step-card {
  background: var(--panel);
  border: 1px solid var(--line);
}

.metric-card {
  padding: 0.9rem 1rem;
}

.metric-value {
  display: block;
  font-size: 1.15rem;
}

.landing-section,
.docs-section {
  padding: 2.6rem 0;
  border-top: 1px solid var(--line);
}

.prose {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.prose p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 1.02rem;
}

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

.prose a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
}

.takeaway-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.takeaway-list li {
  padding: 1rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.7;
}

.citation-text {
  padding: 1rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
  line-height: 1.7;
  font-size: 0.98rem;
}

.citation-block {
  background: var(--panel);
  border: 1px solid var(--line);
}

.citation-block .card-header {
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.citation-block pre.code-block {
  margin: 0;
  border: none;
}

.docs-section .section-label {
  margin-bottom: 0.5rem;
}

.docs-section h2 {
  margin-bottom: 1.4rem;
}

.docs-section > .docs-grid,
.docs-section > .docs-note,
.docs-section > .repo-map,
.docs-section > .model-grid,
.docs-section > .model-viewer-grid,
.docs-section > .command-grid,
.docs-section > .steps,
.docs-section > .checklist,
.docs-section > .link-list {
  margin-top: 1.25rem;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-bottom: 1.4rem;
}

.section-heading p {
  margin: 0;
}

.policy-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.policy-tab {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  padding: 0.65rem 0.85rem;
  font: inherit;
  cursor: pointer;
}

.policy-tab.is-active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.featured-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1rem;
}

.featured-copy h3 {
  margin: 0.35rem 0 0;
  font-size: 1.6rem;
}

.featured-summary {
  margin: 0.8rem 0 0;
  line-height: 1.7;
}

.metric-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1rem;
}

.featured-note {
  margin: 1rem 0 0;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.tag {
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.inline-link {
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.15rem;
}

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

.video-triple {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.video-triple .video-pair-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.task-list {
  display: grid;
  gap: 1.25rem;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 0;
  font-family: var(--mono);
  font-size: 0.95rem;
}

.results-table th,
.results-table td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.results-table thead th {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line-strong);
}

.results-table tbody .results-policy {
  font-family: var(--sans);
  font-weight: 600;
}

.results-table tbody tr:last-child th,
.results-table tbody tr:last-child td {
  border-bottom: none;
}

.hardware-item {
  margin-top: 1.25rem;
}

.hardware-item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.hardware-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.hardware-item .inline-link {
  display: inline-block;
  margin-top: 0.4rem;
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

.subsection-title {
  margin: 2rem 0 1rem;
  font-size: 1.2rem;
}

.model-viewer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.model-viewer-card {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.model-viewer-card h4 {
  margin: 0;
  font-size: 1rem;
}

.stl-viewer {
  width: 100%;
  height: 300px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  cursor: grab;
}

.stl-viewer:active {
  cursor: grabbing;
}

.video-card,
.comparison-column,
.media-overview {
  min-width: 0;
}

.media-slot {
  min-height: 16rem;
  padding: 1rem;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.slot-video {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  margin-top: 0.8rem;
}

.slot-title {
  display: block;
  margin-top: 0.5rem;
  font-size: 1.05rem;
}

.slot-placeholder,
.slot-note {
  margin: 0.45rem 0 0;
}

.slot-placeholder {
  color: var(--muted);
}

.task-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.task-card,
.route-card,
.media-overview,
.media-task-card,
.docs-card,
.docs-note,
.repo-item,
.step-card {
  padding: 1rem;
  min-width: 0;
  overflow: hidden;
}

.task-card strong {
  display: block;
  font-size: 1.05rem;
}

.task-card-subtitle,
.task-card-summary {
  margin: 0.55rem 0 0;
  line-height: 1.65;
}

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

.route-card {
  text-decoration: none;
}

.route-card strong {
  display: block;
  margin-top: 0.45rem;
  font-size: 1.1rem;
}

.route-card p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.docs-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  background: var(--panel);
  text-decoration: none;
  border: 2px solid var(--accent);
  transition: background 0.15s;
}

.docs-banner:hover {
  background: var(--panel-strong);
}

.docs-banner-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.docs-banner-content strong {
  display: block;
  font-size: 1.25rem;
}

.docs-banner-content p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.docs-banner-arrow {
  font-size: 1.8rem;
  flex-shrink: 0;
  margin-left: 2rem;
  color: var(--accent);
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

.link-list li {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
}

.link-list a {
  text-decoration: none;
  font-weight: 600;
}

.reference-cards {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.reference-cards li {
  background: var(--panel);
  border: 1px solid var(--line);
  transition: border-color 0.15s;
}

.reference-cards li:hover {
  border-color: var(--accent);
}

.reference-cards a {
  display: block;
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
}

.reference-cards a strong {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--accent);
}

.reference-cards a span {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  line-height: 1.6;
}

.site-footer {
  padding: 0 0 2rem;
  color: var(--muted);
}

.media-intro {
  padding: 1rem 0 2rem;
}

.media-overview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 1rem;
  margin-bottom: 1rem;
}

.media-overview h2 {
  margin: 0.35rem 0 0;
  font-size: 1.7rem;
}

.media-task-list {
  display: grid;
  gap: 1rem;
}

.media-task-head h3 {
  margin: 0.2rem 0 0;
  font-size: 1.2rem;
}

.media-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.comparison-column {
  display: grid;
  gap: 0.8rem;
}

.comparison-column h4 {
  margin: 0;
  font-size: 0.95rem;
}

.docs-shell {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 2rem;
  padding: 2.5rem 0 5rem;
}

.docs-content {
  min-width: 0;
  overflow: hidden;
}

.docs-nav {
  position: sticky;
  top: 1rem;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.docs-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  padding-left: 0.7rem;
  border-left: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.docs-nav a:hover {
  color: var(--ink);
}

.docs-nav a.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

.docs-grid,
.model-grid,
.steps,
.command-grid,
.repo-map {
  display: grid;
  gap: 1rem;
}

.docs-grid,
.model-grid,
.steps {
  grid-template-columns: 1fr;
}

.command-grid {
  grid-template-columns: 1fr;
}

.docs-note {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-top: 1rem;
}

.model-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.model-detail-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  padding: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--line);
}

.model-detail-info h3 {
  margin: 0.35rem 0 0;
  font-size: 1.4rem;
}

.model-detail-info p {
  margin: 0.6rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.model-arch-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: 1.5rem;
  background: var(--panel-strong);
  border: 1px dashed var(--line-strong);
}

.model-arch-placeholder img {
  display: block;
  max-width: 100%;
  max-height: 500px;
  width: auto;
  height: auto;
  object-fit: contain;
}

.arch-placeholder-text {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* Step-embedded commands */
.step-command {
  margin-top: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.step-video {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.step-video-el {
  display: block;
  width: 100%;
  max-width: 100%;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.step-video-caption {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}
/* Model tabs */
.model-tab-group {
  margin-top: 1.25rem;
}

.model-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.model-tab {
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.model-tab:hover {
  color: var(--fg);
}

.model-tab.active {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

.model-tab-panel {
  display: none;
  padding-top: 1rem;
}

.model-tab-panel.active {
  display: block;
}

.command-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.command-col h4 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.tip-card {
  padding: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--line);
}

.tip-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.tip-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.tip-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  line-height: 1.7;
}

.tip-card li {
  margin-bottom: 0.35rem;
}

.tip-card li:last-child {
  margin-bottom: 0;
}

.inline-code {
  padding: 0.15em 0.4em;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.85em;
}

.repo-item code {
  font-family: var(--mono);
  font-size: 0.86rem;
}

.model-hook {
  display: inline-block;
  margin-bottom: 0.6rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.card-header h3 {
  margin: 0;
}

.copy-button {
  margin-left: auto;
  appearance: none;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  padding: 0.45rem 0.7rem;
  font: inherit;
  cursor: pointer;
}

.code-block {
  margin: 0;
  padding: 1rem;
  background: var(--panel-strong);
  color: var(--ink);
  border: 1px solid var(--line);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.7;
  max-width: 100%;
}

.code-block code {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

.docs-card {
  max-width: 100%;
}

.checklist {
  margin: 0;
  padding-left: 1.1rem;
}

.checklist li + li {
  margin-top: 0.6rem;
}

@media (max-width: 960px) {
  .masthead,
  .featured-panel,
  .media-overview,
  .docs-shell,
  .video-pair,
  .video-triple,
  .media-comparison {
    grid-template-columns: 1fr;
  }

  .task-strip,
  .route-grid,
  .docs-grid,
  .model-grid,
  .model-viewer-grid,
  .steps,
  .command-grid {
    grid-template-columns: 1fr;
  }

  .metric-grid {
    grid-template-columns: 1fr;
  }

  .docs-nav {
    position: static;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
  }

  .docs-content {
    min-width: 0;
  }

}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    flex-wrap: wrap;
  }

  .page {
    padding-top: 1.5rem;
  }

  .masthead h1,
  .section-heading h2,
  .media-intro h1,
  .docs-section h1,
  .docs-section h2 {
    font-size: clamp(1.95rem, 10vw, 3rem);
  }

  .masthead-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}