:root {
  --bg: #fffafd;
  --panel: #ffffff;
  --panel-soft: rgba(255, 255, 255, 0.82);
  --ink: #181827;
  --muted: #66677c;
  --line: rgba(154, 75, 139, 0.16);
  --purple: #b044f4;
  --violet: #d65ce8;
  --blue: #f06ba8;
  --pink: #f06ba8;
  --cyan: #ff9ac8;
  --shadow: 0 18px 46px rgba(104, 44, 98, 0.09);
  --radius: 28px;
  --radius-sm: 16px;
  --page-max: 1600px;
  --wide-max: 1680px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 8% 0, rgba(176,68,244,.10), transparent 28rem),
    radial-gradient(circle at 84% 4%, rgba(255,154,200,.13), transparent 34rem),
    linear-gradient(180deg, #fffafd 0%, #fff4fb 48%, #fffafd 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}
img, video, iframe { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { color: var(--muted); }
.skip-link { position: absolute; left: -999px; top: 1rem; background: var(--ink); color: white; padding: .7rem 1rem; border-radius: 999px; z-index: 20; }
.skip-link:focus { left: 1rem; }

.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(18px); background: rgba(255,250,253,.84); border-bottom: 1px solid var(--line); }
.nav-shell { width: min(94vw, var(--wide-max)); margin: 0 auto; padding: .82rem 0; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; font-weight: 860; letter-spacing: -.02em; white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: .28rem; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a { color: var(--muted); padding: .5rem .78rem; border-radius: 999px; font-size: .93rem; }
.nav-links a.active, .nav-links a:hover { color: var(--ink); background: rgba(176,68,244,.09); }
.nav-toggle { display: none; border: 0; background: white; border-radius: 12px; padding: .55rem .75rem; box-shadow: var(--shadow); }
.scroll-progress { height: 3px; background: rgba(176,68,244,.08); }
.scroll-progress span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--purple), var(--blue), var(--cyan)); }

.content-grid { width: min(90vw, var(--page-max)); margin: 0 auto; }
.wide-grid { width: min(94vw, var(--wide-max)); margin: 0 auto; }
.section-pad { padding: 5.25rem 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.35rem; }
.glass { background: var(--panel-soft); backdrop-filter: blur(18px); }
.soft-card { background: linear-gradient(135deg, rgba(176,68,244,.075), rgba(240,107,168,.07)); }
.eyebrow { color: var(--purple); text-transform: uppercase; font-size: .78rem; letter-spacing: .14em; font-weight: 860; margin: 0 0 .65rem; }
h1, h2, h3 { letter-spacing: -.045em; line-height: 1.05; margin: 0 0 .85rem; }
h1 { font-size: clamp(6rem, 11vw, 10.5rem); line-height: .86; }
h2 { font-size: clamp(2.2rem, 3.8vw, 4.4rem); }
h3 { font-size: 1.24rem; }
.section-lede, .hero-lede, .section-heading p { font-size: clamp(1.03rem, 1vw, 1.2rem); }
.section-heading { margin-bottom: 2rem; }
.section-heading.compact { max-width: 1120px; }

.hero { position: relative; overflow: hidden; padding-top: 5rem; padding-bottom: 3.2rem; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(circle at 10% 45%, rgba(231,136,255,.16), transparent 28rem), radial-gradient(circle at 82% 35%, rgba(240,107,168,.18), transparent 34rem); pointer-events: none; }
.hero-shell { position: relative; width: min(92vw, var(--wide-max)); margin: 0 auto; }
.hero-main { display: grid; grid-template-columns: minmax(560px, .92fr) minmax(680px, 1.08fr); gap: clamp(2rem, 3vw, 4rem); align-items: center; }
.hero-copy { min-width: 0; }
.hero h2 { max-width: 980px; font-size: clamp(2.05rem, 3vw, 3.6rem); }
.hero-lede { max-width: 900px; color: #4f5064; }
.hero-actions, .button-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.25rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 2.55rem; padding: .7rem 1rem; border-radius: 999px; border: 1px solid rgba(176,68,244,.22); background: white; color: var(--ink); font-weight: 800; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 30px rgba(104,44,98,.12); }
.btn:focus-visible { outline: 3px solid rgba(176,68,244,.34); outline-offset: 3px; }
.btn.primary { color: white; background: linear-gradient(135deg, var(--purple), var(--pink)); border-color: transparent; }
.btn.muted { color: var(--muted); background: rgba(255,255,255,.68); }
.btn-icon { display: inline-flex; margin-right: .48rem; font-size: 1.08em; line-height: 1; }
.project-links .btn-icon { width: 1.15em; height: 1.15em; align-items: center; justify-content: center; flex: 0 0 auto; }
.resource-icon { width: 1.15em !important; height: 1.15em !important; max-width: 1.15em; object-fit: contain; }
.project-links { width: min(980px, calc(100vw - 2rem)); justify-content: center; }
.project-links .btn { min-width: 7.4rem; }
.stat-ribbon { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: .75rem; margin-top: 1.5rem; }
.stat-ribbon div { border: 1px solid var(--line); background: rgba(255,255,255,.78); border-radius: 20px; padding: .95rem .95rem 1rem; min-height: 96px; }
.stat-ribbon strong { display: block; font-size: clamp(1.35rem, 1.6vw, 2rem); line-height: 1; }
.stat-ribbon span { color: var(--muted); font-size: .9rem; }
.hero-media { padding: .85rem; }
.video-frame { overflow: hidden; border-radius: 24px; background: linear-gradient(135deg, rgba(24,24,39,.92), rgba(104,44,98,.72)); border: 1px solid rgba(255,255,255,.5); }
.video-frame video { width: 100%; height: 100%; object-fit: cover; }
.hero-video-frame { aspect-ratio: 16 / 9; min-height: 430px; }
.loop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; margin-top: .75rem; }
.loop-grid video { aspect-ratio: 16 / 10; object-fit: cover; border-radius: 16px; opacity: .94; }

.overview-grid { display: grid; grid-template-columns: minmax(560px, .9fr) minmax(620px, 1.1fr); gap: clamp(2rem, 3vw, 3.5rem); align-items: center; }
.overview-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; margin-top: 1.2rem; }
.overview-cards .card { padding: 1rem; box-shadow: none; }
.overview-video { aspect-ratio: 16 / 9; box-shadow: var(--shadow); }
.cardless { padding: 0; }

.metric-chips { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1rem; }
.metric-chips span { border: 1px solid rgba(176,68,244,.17); background: rgba(255,255,255,.78); color: #584159; padding: .52rem .75rem; border-radius: 999px; font-weight: 760; }
.atlas-heading { display: grid; grid-template-columns: minmax(620px, 1fr) minmax(480px, .78fr); gap: 2rem; align-items: end; margin-bottom: 1.2rem; }
.atlas-heading h2 { margin-bottom: .5rem; }
.atlas-metrics { justify-content: flex-end; }
.atlas-frame-wrap { padding: .9rem; overflow: hidden; }
.module-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .8rem; padding: .15rem .2rem .25rem; }
.module-head div { display: grid; gap: .1rem; }
.module-head strong { font-size: 1rem; }
.module-head span { color: var(--muted); font-size: .9rem; }
.atlas-frame-wrap iframe { width: 100%; height: clamp(760px, 52vw, 900px); border: 0; border-radius: 22px; background: white; box-shadow: inset 0 0 0 1px var(--line); }

.frame-section { display: grid; gap: 1.1rem; }
.pipeline-figure { padding: .8rem; overflow: hidden; }
.pipeline-figure img { width: 100%; max-height: 520px; object-fit: contain; background: white; border-radius: 22px; }
.pipeline-figure figcaption { color: var(--muted); font-size: .92rem; padding: .85rem .4rem .2rem; margin: 0; }
.browser-grid { display: grid; grid-template-columns: 285px minmax(0, 1fr) 350px; gap: 1rem; align-items: stretch; }
.family-list { display: grid; gap: .65rem; align-content: start; }
.family-list button, .tabs button, .segmented button { border: 1px solid var(--line); background: rgba(255,255,255,.75); color: var(--muted); border-radius: 16px; padding: .85rem; text-align: left; font-weight: 800; cursor: pointer; }
.family-list button.active, .tabs button.active, .segmented button.active { color: white; background: linear-gradient(135deg, var(--purple), var(--pink)); border-color: transparent; }
.example-panel { padding: .6rem; }
.lu-chip-wrap { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1rem 0; }
.lu-chip-wrap button { border: 1px solid rgba(176,68,244,.2); background: white; border-radius: 999px; padding: .48rem .7rem; cursor: pointer; }
.lu-chip-wrap button.active { background: rgba(176,68,244,.11); color: var(--purple); font-weight: 850; }
.pipeline { display: flex; gap: .55rem; flex-wrap: wrap; align-content: center; align-items: center; font-weight: 800; }
.pipeline span { background: white; padding: .55rem .7rem; border-radius: 999px; border: 1px solid var(--line); }
.skeleton-card { display: grid; grid-template-columns: 110px 1fr; gap: 1rem; align-items: center; margin-top: 1rem; background: linear-gradient(135deg, rgba(176,68,244,.07), rgba(240,107,168,.08)); }
.skeleton-lines { height: 110px; border-radius: 24px; background: linear-gradient(135deg, rgba(176,68,244,.2), rgba(240,107,168,.14)); position: relative; }
.skeleton-lines:before { content: ""; position: absolute; inset: 18px 34px; border: 4px solid rgba(176,68,244,.45); border-left-color: transparent; border-bottom-color: transparent; border-radius: 50%; transform: rotate(18deg); }

.interaction-layout { display: grid; grid-template-columns: 285px 1fr; gap: 1rem; align-items: start; }
.tabs { display: grid; gap: .6rem; }
.object-card { min-height: 330px; display: grid; align-content: center; background: linear-gradient(135deg, rgba(176,68,244,.09), rgba(255,154,200,.1)); }
.object-visual, .g1-visual { min-height: 150px; border-radius: 22px; display: grid; place-items: center; background: radial-gradient(circle at 40% 35%, rgba(176,68,244,.32), transparent 4rem), radial-gradient(circle at 60% 65%, rgba(240,107,168,.28), transparent 4rem), rgba(255,255,255,.58); border: 1px dashed rgba(176,68,244,.3); color: var(--purple); font-weight: 900; margin-bottom: 1rem; text-align: center; padding: 1rem; }
.note, .caption { font-size: .92rem; color: var(--muted); }
.badge { display: inline-flex; align-items: center; width: fit-content; border-radius: 999px; padding: .35rem .6rem; background: rgba(176,68,244,.1); color: var(--purple); font-weight: 850; font-size: .8rem; }

.g1-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: .5rem 0 1rem; }
.g1-summary div { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: 20px; padding: 1rem; }
.g1-summary strong { display: block; font-size: 1.2rem; }
.g1-summary span { color: var(--muted); }
.segmented { display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 1rem; }
.segmented button { text-align: center; border-radius: 999px; padding: .7rem .9rem; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.g1-card { min-height: 285px; display: flex; flex-direction: column; justify-content: space-between; }

.benchmark-grid { display: grid; grid-template-columns: minmax(300px, .7fr) minmax(0, 1.3fr); gap: 1rem; align-items: stretch; }
.coverage-card { grid-row: span 2; }
.big-number { font-size: clamp(4rem, 6vw, 6.2rem); color: var(--purple); font-weight: 900; letter-spacing: -.07em; margin: .4rem 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .93rem; }
th, td { padding: .62rem .55rem; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
tr.highlight-row td { color: var(--purple); font-weight: 900; }

.release-section { display: grid; gap: 1.1rem; }
.release-copy { max-width: 980px; }
.release-grid { display: grid; grid-template-columns: minmax(560px, .9fr) minmax(620px, 1.1fr); gap: 1rem; }
.release-list ul { margin-top: .3rem; color: var(--muted); }
.field-list { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9rem; line-height: 1.7; background: rgba(176,68,244,.055); border: 1px solid var(--line); border-radius: 16px; padding: .85rem; }
.manifest-card pre { white-space: pre-wrap; word-break: break-word; background: #111226; color: #f4f4ff; border-radius: 18px; padding: 1rem; overflow: auto; max-height: 520px; }
.site-footer { border-top: 1px solid var(--line); padding: 2rem 0; color: var(--muted); }
.footer-grid { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

@media (max-width: 1320px) {
  .hero-main, .overview-grid, .atlas-heading, .release-grid { grid-template-columns: 1fr; }
  .hero-video-frame { min-height: 360px; }
  .stat-ribbon { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 980px) {
  .browser-grid, .interaction-layout { grid-template-columns: 1fr; }
  .overview-cards, .gallery-grid, .g1-summary, .benchmark-grid { grid-template-columns: 1fr; }
  .coverage-card { grid-row: auto; }
}
@media (max-width: 760px) {
  .content-grid, .wide-grid, .hero-shell, .nav-shell { width: min(94vw, var(--page-max)); }
  .section-pad { padding: 3.5rem 0; }
  .nav-toggle { display: inline-flex; }
  .nav-links { display: none; position: absolute; left: 3vw; right: 3vw; top: 4.2rem; padding: .8rem; background: rgba(255,255,255,.96); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  h1 { font-size: clamp(4.5rem, 22vw, 6rem); }
  .stat-ribbon { grid-template-columns: repeat(2, 1fr); }
  .loop-grid { grid-template-columns: repeat(2, 1fr); }
  .atlas-frame-wrap iframe { height: 560px; }
}

/* V1.2 section-navigation and hero breathing-space pass. */
:root {
  --nav-height: 64px;
  --page-max: 1680px;
  --wide-max: 1760px;
}

html { scroll-padding-top: calc(var(--nav-height) + 14px); }
.site-section { position: relative; scroll-margin-top: calc(var(--nav-height) + 14px); }
.section-pad { padding: clamp(72px, 8vh, 112px) 0; }
.site-header { min-height: var(--nav-height); }
.nav-shell { min-height: calc(var(--nav-height) - 3px); padding: .45rem 0; }

.hero.section-pad {
  min-height: calc(100svh - var(--nav-height));
  display: flex;
  align-items: center;
  padding: clamp(18px, 2.2vh, 32px) 0 clamp(14px, 1.8vh, 26px);
}
.hero-shell {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto auto;
  gap: clamp(14px, 1.8vh, 24px);
}
.hero-main {
  grid-template-columns: minmax(540px, .9fr) minmax(680px, 1.1fr);
  gap: clamp(34px, 4.8vw, 86px);
  align-items: center;
}
.hero .eyebrow { margin-bottom: .45rem; max-width: 780px; }
.hero h1 {
  font-size: clamp(5.4rem, 8.5vw, 9.4rem);
  line-height: .82;
  margin-bottom: .65rem;
}
.hero h2 {
  max-width: 820px;
  font-size: clamp(2.1rem, 3.05vw, 3.45rem);
  line-height: 1;
  margin-bottom: .75rem;
}
.hero-lede { max-width: 760px; margin: .25rem 0 0; }
.hero-actions { margin-top: 1rem; }
.hero-media {
  align-self: center;
  padding: .78rem;
  max-height: min(56vh, 580px);
}
.hero-video-frame {
  min-height: 0;
  height: min(43vh, 470px);
  max-height: 470px;
  aspect-ratio: auto;
}
.loop-grid { gap: .55rem; margin-top: .62rem; }
.loop-grid video { height: clamp(64px, 8vh, 94px); aspect-ratio: auto; }
.stat-ribbon { margin-top: 0; gap: .75rem; }
.stat-ribbon div { min-height: 78px; padding: .75rem .9rem; }
.stat-ribbon strong { font-size: clamp(1.25rem, 1.45vw, 1.78rem); }

.overview-grid.site-section {
  min-height: calc(100svh - var(--nav-height));
  align-content: center;
}

@media (max-width: 1320px) {
  .hero.section-pad { min-height: auto; padding: 3.5rem 0 2rem; }
  .hero-media { max-height: none; }
  .hero-video-frame { height: auto; min-height: 360px; aspect-ratio: 16 / 9; }
  .loop-grid video { height: auto; aspect-ratio: 16 / 10; }
}

@media (max-width: 760px) {
  :root { --nav-height: 60px; }
  .section-pad { padding: 3.5rem 0; }
  .hero.section-pad { padding: 2.7rem 0 2rem; }
  .hero h1 { font-size: clamp(4.4rem, 22vw, 6rem); }
  .hero h2 { font-size: clamp(2rem, 10vw, 2.65rem); }
}

/* V1.3 legacy desktop compaction; V1.4/V1.5 below relax spacing and remove next controls. */
@media (min-width: 1321px) and (min-height: 900px) {
  html { scroll-padding-top: var(--nav-height); }
  .site-section { scroll-margin-top: var(--nav-height); }
  .site-section:not(.hero) { min-height: auto; padding: 42px 0 26px; }
  .section-heading { margin-bottom: 1rem; }
  .section-heading.compact { max-width: 1000px; }
  .section-heading p, .section-lede, .hero-lede { font-size: 1.02rem; }
  .eyebrow { margin-bottom: .42rem; }
  h2 { font-size: clamp(2rem, 3vw, 3.45rem); }
  h3 { font-size: 1.08rem; }
  p { margin-top: .45rem; margin-bottom: .55rem; }
  .card { padding: 1rem; }

  .hero.section-pad { padding-top: 14px; padding-bottom: 12px; }
  .hero-shell { gap: 12px; }
  .hero h1 { font-size: clamp(5rem, 7.6vw, 8.7rem); margin-bottom: .45rem; }
  .hero h2 { font-size: clamp(2rem, 2.72vw, 3.16rem); max-width: 780px; }
  .hero-video-frame { height: min(40vh, 430px); }
  .loop-grid video { height: clamp(58px, 7vh, 78px); }
  .stat-ribbon div { min-height: 72px; padding: .62rem .85rem; }

  .overview-grid.site-section {
    min-height: auto;
    grid-template-columns: minmax(520px, .92fr) minmax(650px, 1.08fr);
    gap: 38px;
    align-content: center;
  }
  .overview-copy h2 { max-width: 760px; }
  .overview-cards { gap: .65rem; margin-top: .8rem; }
  .overview-cards .card { padding: .82rem; }
  .overview-cards p { font-size: .92rem; }
  .overview-video { max-height: 430px; }
  .overview-video video { max-height: 430px; }

  .atlas-section { padding-top: 38px !important; }
  .atlas-heading {
    grid-template-columns: minmax(650px, 1fr) minmax(470px, .72fr);
    gap: 1.4rem;
    margin-bottom: .75rem;
  }
  .metric-chips { gap: .42rem; margin-top: .65rem; }
  .metric-chips span { padding: .42rem .62rem; font-size: .9rem; }
  .atlas-frame-wrap { padding: .65rem; }
  .module-head { margin-bottom: .45rem; }
  .atlas-frame-wrap iframe { height: clamp(540px, 57vh, 620px); }

  .frame-section {
    grid-template-columns: minmax(430px, .62fr) minmax(0, 1.38fr);
    grid-auto-rows: auto;
    gap: 14px 18px;
    align-content: center;
    align-items: stretch;
  }
  .frame-section .section-heading { grid-column: 1; margin-bottom: 0; }
  .frame-section .pipeline-figure { grid-column: 2; grid-row: 1 / span 2; margin: 0; min-height: 0; }
  .pipeline-figure img { max-height: 548px; border-radius: 18px; }
  .pipeline-figure figcaption { font-size: .78rem; line-height: 1.35; padding: .45rem .25rem 0; }
  .frame-section .browser-grid {
    grid-column: 1;
    grid-template-columns: 1fr;
    gap: .48rem;
    max-height: 392px;
    overflow: hidden;
    padding: .75rem;
  }
  .browser-grid .pipeline { display: none; }
  .family-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .4rem; }
  .family-list button { padding: .52rem .58rem; font-size: .82rem; border-radius: 13px; }
  .example-panel { padding: .15rem; }
  .lu-chip-wrap { gap: .34rem; margin: .45rem 0; max-height: 70px; overflow: hidden; }
  .lu-chip-wrap button { padding: .36rem .52rem; font-size: .82rem; }
  .skeleton-card { grid-template-columns: 68px 1fr; gap: .72rem; margin-top: .45rem; padding: .65rem; }
  .skeleton-lines { height: 68px; border-radius: 17px; }

  .object-section .interaction-layout { grid-template-columns: 230px 1fr; gap: .75rem; }
  .tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .45rem; }
  .tabs button { padding: .55rem .6rem; font-size: .86rem; }
  .object-card { min-height: 270px; }
  .object-visual { min-height: 108px; border-radius: 18px; margin-bottom: .7rem; }
  .note, .caption { font-size: .84rem; }

  .g1-section .section-heading { max-width: 1320px; }
  .g1-summary { gap: .7rem; margin: .45rem 0 .7rem; }
  .g1-summary div { padding: .72rem .85rem; }
  .segmented { gap: .42rem; margin-bottom: .7rem; }
  .segmented button { padding: .52rem .72rem; font-size: .86rem; }
  .gallery-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: .65rem; }
  .g1-card { min-height: 232px; padding: .72rem; }
  .g1-card h3 { font-size: .98rem; margin-bottom: .35rem; }
  .g1-card p { font-size: .78rem; line-height: 1.35; }
  .g1-visual { min-height: 72px; border-radius: 16px; margin-bottom: .55rem; padding: .55rem; font-size: .86rem; }
  .badge { font-size: .72rem; padding: .25rem .48rem; }

  .benchmark-grid { grid-template-columns: minmax(270px, .55fr) minmax(0, 1.45fr); gap: .75rem; }
  .benchmark-grid .card { padding: .86rem; }
  .big-number { font-size: clamp(3rem, 4.2vw, 4.6rem); margin: .12rem 0; }
  table { font-size: .82rem; }
  th, td { padding: .38rem .42rem; }

  .release-grid { grid-template-columns: minmax(560px, .95fr) minmax(620px, 1.05fr); gap: .8rem; }
  .release-list h3 { margin-top: .45rem; margin-bottom: .25rem; }
  .release-list ul { columns: 2; margin-bottom: .35rem; }
  .field-list { font-size: .78rem; line-height: 1.45; padding: .58rem; }
  .manifest-card pre { max-height: 390px; font-size: .8rem; line-height: 1.35; }
}

@media (min-width: 1321px) and (min-height: 900px) {
  .frame-section {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 14px 18px;
  }
  .frame-section .section-heading {
    grid-column: 1 / -1;
    grid-row: auto;
    max-width: none;
    margin-bottom: 0;
  }
  .frame-section .section-heading h2 { max-width: 1120px; }
  .frame-section .section-heading p:not(.eyebrow) { max-width: 1320px; }
  .frame-section .metric-chips { margin-top: .45rem; }
  .frame-section .pipeline-figure {
    grid-column: 1;
    grid-row: auto;
    align-self: stretch;
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
  }
  .frame-section .browser-grid {
    grid-column: 2;
    grid-row: auto;
    max-height: 428px;
    align-self: stretch;
  }
  .pipeline-figure img { max-height: 372px; align-self: center; }
}

/* V1.4: prominent top section directory and relaxed full-content sections. */
:root { --nav-height: 82px; }
.site-header {
  background: rgba(255, 250, 253, .92);
  box-shadow: 0 12px 34px rgba(104, 44, 98, .07);
}
.nav-shell {
  min-height: calc(var(--nav-height) - 3px);
  padding: .7rem 0;
  gap: 2rem;
}
.brand { font-size: 1.08rem; }
.nav-links {
  gap: .52rem;
  padding: .38rem;
  border: 1px solid rgba(176, 68, 244, .13);
  border-radius: 999px;
  background: rgba(255, 255, 255, .68);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.58), 0 12px 30px rgba(104,44,98,.06);
}
.nav-links a {
  padding: .72rem 1.05rem;
  font-size: 1rem;
  font-weight: 820;
  color: #5a465c;
}
.nav-links a.active,
.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
  background: linear-gradient(135deg, rgba(176,68,244,.16), rgba(240,107,168,.13));
  box-shadow: 0 8px 22px rgba(104,44,98,.08);
  outline: none;
}
.scroll-progress { height: 4px; }

html { scroll-padding-top: calc(var(--nav-height) + 18px); }
.site-section { scroll-margin-top: calc(var(--nav-height) + 18px); }
.section-pad { padding: clamp(96px, 11vh, 150px) 0; }
.site-section + .site-section { border-top: 1px solid rgba(176,68,244,.06); }

.hero.section-pad {
  min-height: auto;
  padding: clamp(74px, 9vh, 120px) 0 clamp(70px, 8vh, 112px);
}
.hero-shell { gap: clamp(22px, 3vh, 38px); }
.hero h1 { font-size: clamp(5.8rem, 8.8vw, 10.2rem); }
.hero h2 { font-size: clamp(2.25rem, 3.2vw, 3.75rem); }
.hero-video-frame { height: auto; min-height: 430px; aspect-ratio: 16 / 9; max-height: none; }
.loop-grid video { height: auto; aspect-ratio: 16 / 10; }
.stat-ribbon { margin-top: clamp(22px, 3vh, 34px); }
.stat-ribbon div { min-height: 96px; padding: .95rem; }

.overview-grid.site-section {
  min-height: auto;
  grid-template-columns: minmax(560px, .9fr) minmax(660px, 1.1fr);
}
.overview-video,
.overview-video video { max-height: none; }

.atlas-section { padding-top: clamp(96px, 10vh, 140px) !important; }
.atlas-frame-wrap iframe { height: clamp(760px, 52vw, 900px); }

.frame-section {
  grid-template-columns: 1fr;
  gap: 1.2rem;
}
.frame-section .section-heading {
  grid-column: auto;
  max-width: 1120px;
}
.frame-section .pipeline-figure {
  grid-column: auto;
  grid-row: auto;
  display: block;
}
.pipeline-figure img { max-height: 560px; }
.frame-section .browser-grid {
  grid-column: auto;
  grid-row: auto;
  grid-template-columns: 285px minmax(0, 1fr) 350px;
  max-height: none;
  overflow: visible;
}
.browser-grid .pipeline { display: flex; }
.family-list { grid-template-columns: none; }
.lu-chip-wrap { max-height: none; overflow: visible; }
.skeleton-card { grid-template-columns: 110px 1fr; }
.skeleton-lines { height: 110px; }

.object-section .interaction-layout { grid-template-columns: 285px 1fr; }
.tabs { grid-template-columns: none; }
.object-card { min-height: 330px; }
.object-visual { min-height: 150px; }

.g1-summary { margin: .5rem 0 1rem; }
.gallery-grid { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.g1-card { min-height: 285px; padding: 1.35rem; }
.g1-visual { min-height: 150px; }
.g1-card p { font-size: inherit; line-height: inherit; }

.benchmark-grid { grid-template-columns: minmax(300px, .7fr) minmax(0, 1.3fr); gap: 1rem; }
.big-number { font-size: clamp(4rem, 6vw, 6.2rem); }
table { font-size: .93rem; }
th, td { padding: .62rem .55rem; }

.release-grid { grid-template-columns: minmax(560px, .9fr) minmax(620px, 1.1fr); gap: 1rem; }
.release-list ul { columns: auto; }
.field-list { font-size: .9rem; line-height: 1.7; padding: .85rem; }
.manifest-card pre { max-height: 520px; font-size: inherit; line-height: inherit; }

@media (max-width: 1480px) {
  .nav-links a { padding: .62rem .78rem; font-size: .94rem; }
  .nav-shell { gap: 1rem; }
}
@media (max-width: 1320px) {
  :root { --nav-height: 68px; }
  .nav-links { border-radius: 22px; }
}

/* Let hero media reserve its full visual height after removing one-screen constraint. */
.hero-media { max-height: none; overflow: visible; }

/* V1.5: reviewer-facing cover hero, skeleton viewers, and release cleanup. */
.hero-title-cover {
  min-height: calc(88svh - var(--nav-height));
  display: flex;
  align-items: center;
  padding: clamp(96px, 11vh, 150px) 0 clamp(84px, 10vh, 132px);
}
.hero-title-cover .hero-shell {
  width: min(94vw, 1760px);
  display: grid;
  gap: clamp(32px, 4.5vh, 62px);
}
.hero-main-titleonly {
  grid-template-columns: 1fr !important;
  justify-items: center;
  text-align: center;
}
.hero-main-titleonly .hero-copy {
  width: min(100%, 1640px);
  display: grid;
  justify-items: center;
}
.hero-title-cover h1 {
  font-size: clamp(8rem, 17vw, 19.5rem);
  line-height: .78;
  margin: .06em 0 .09em;
  letter-spacing: -.09em;
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: clamp(.06em, .8vw, .12em);
  color: inherit;
}

.hero-wordmark .wordmark-hi,
.hero-wordmark .wordmark-phi {
  display: inline-block;
  letter-spacing: -.09em;
}
.hero-wordmark .wordmark-hi {
  color: #21172b;
  text-shadow: 0 18px 44px rgba(176,68,244,.10);
}
.hero-wordmark .wordmark-phi {
  background: linear-gradient(105deg, #b044f4 8%, #d65ce8 46%, #f06ba8 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-hi { color: #21172b; }
.brand-phi { color: #b044f4; margin-left: .02em; }

.hero-title-cover h2 {
  max-width: 1700px;
  font-size: clamp(2.45rem, 4vw, 5.1rem);
  line-height: 1.02;
  margin-bottom: clamp(16px, 2vh, 26px);
}
.hero-title-cover .title-lines span { display: block; white-space: nowrap; }
.hero-title-cover .hero-lede {
  max-width: 1140px;
  font-size: clamp(1.35rem, 1.65vw, 2.05rem);
  color: #5a465c;
  margin: 0;
}
.paper-byline {
  width: min(100%, 1480px);
  margin-top: clamp(24px, 3vh, 38px);
  display: grid;
  gap: .62rem;
}
.paper-byline p { margin: 0; }
.author-list {
  color: var(--ink);
  font-size: clamp(1.06rem, 1.12vw, 1.34rem);
  line-height: 1.66;
  font-weight: 780;
}
.author-link {
  border-radius: .3em;
  text-decoration: underline;
  text-decoration-color: rgba(130,46,181,.32);
  text-decoration-thickness: 1px;
  text-underline-offset: .16em;
  transition: filter .16s ease, text-decoration-color .16s ease;
}
.author-link:hover {
  filter: brightness(.82);
  text-decoration-color: currentColor;
}
.author-link:focus-visible {
  outline: 2px solid rgba(176,68,244,.45);
  outline-offset: 3px;
}
.author-emphasis {
  padding: .04em .14em;
  border-radius: .32em;
  font-weight: 900;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.author-emphasis.is-equal {
  color: #822eb5;
  background: rgba(176,68,244,.11);
}
.author-emphasis.is-corresponding {
  color: #b82f70;
  background: rgba(240,107,168,.13);
}
.affiliation-list,
.author-notes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .35rem 1rem;
  line-height: 1.5;
}
.affiliation-list { color: #5f5067; font-size: clamp(.78rem, .72vw, .9rem); }
.author-notes { color: var(--muted); font-size: .78rem; }
.paper-byline sup {
  color: var(--purple);
  font-size: .7em;
  line-height: 0;
}
.hero-title-cover .stat-ribbon {
  width: min(100%, 1540px);
  margin: 0 auto;
}
.hero-title-cover .stat-ribbon div { min-height: 104px; }

.atlas-note-card { align-content: center; }

.object-card.skeleton-object-card,
.g1-player {
  overflow: hidden;
}
.object-card.skeleton-object-card {
  align-content: stretch;
}
.object-player-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(330px, .88fr);
  gap: clamp(1rem, 2vw, 1.6rem);
  align-items: stretch;
}
.skeleton-player-stage,
.object-skeleton-stage {
  position: relative;
  min-height: 430px;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(176, 68, 244, .14);
  background: radial-gradient(circle at 50% 35%, rgba(185,138,217,.14), transparent 38%), #fbfaf6;
}
.object-skeleton-stage { min-height: 390px; }
.object-view-tabs {
  position: absolute;
  top: .72rem;
  right: .72rem;
  z-index: 2;
}
.motion-canvas,
.object-motion-canvas {
  width: 100%;
  height: 100%;
  min-height: inherit;
  display: block;
}
.object-info-panel {
  display: grid;
  align-content: center;
}
.object-info-panel h3 { font-size: clamp(1.7rem, 2.4vw, 2.7rem); }
.object-object-name {
  margin: .1rem 0 .65rem;
  color: var(--purple);
  font-weight: 850;
  text-transform: capitalize;
}
.object-kv {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
  margin: 1rem 0;
}
.object-kv span {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: .75rem;
  background: rgba(255,255,255,.72);
  color: var(--muted);
  font-weight: 760;
}
.player-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .45rem;
}
.player-toolbar {
  display: grid;
  justify-items: end;
  gap: .45rem;
}
.viewer-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .35rem;
}
.player-tabs button,
.viewer-tabs button {
  border: 1px solid rgba(176,68,244,.16);
  background: rgba(255,255,255,.76);
  color: var(--muted);
  border-radius: 999px;
  padding: .55rem .8rem;
  font-weight: 820;
  cursor: pointer;
}
.player-tabs button.active,
.player-tabs button:hover,
.viewer-tabs button.active,
.viewer-tabs button:hover {
  color: var(--ink);
  background: linear-gradient(135deg, rgba(176,68,244,.16), rgba(240,107,168,.13));
}
.viewer-tabs button { padding: .42rem .68rem; font-size: .82rem; }
.playbar.inline-playbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto auto;
  gap: .9rem;
  align-items: center;
  margin-top: 1rem;
  padding: .8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,.72);
}
.object-playbar { grid-template-columns: auto minmax(0, 1fr) auto auto; }
.playbar input[type="range"] { width: 100%; accent-color: var(--purple); }
.speed-control {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  color: var(--muted);
  font-weight: 800;
  white-space: nowrap;
}
.speed-control select {
  border: 1px solid rgba(176,68,244,.18);
  border-radius: 999px;
  padding: .48rem .7rem;
  background: white;
  color: var(--ink);
  font-weight: 820;
}
.btn.small { padding: .58rem .9rem; font-size: .9rem; }
.g1-player .skeleton-player-stage { min-height: 560px; }
.release-grid-single { grid-template-columns: 1fr !important; max-width: 1120px; margin-left: 0; }

@media (max-width: 1180px) {
  .hero-title-cover h1 { font-size: clamp(5.8rem, 22vw, 10rem); }
  
.hero-title-cover h2 { font-size: clamp(2.2rem, 7vw, 4.8rem); }
  .hero-title-cover .stat-ribbon { grid-template-columns: repeat(2, 1fr); }
  .object-player-layout { grid-template-columns: 1fr; }
  .module-head,
  .playbar.inline-playbar { grid-template-columns: 1fr; }
  .module-head { display: grid; align-items: start; }
  .player-toolbar,
  .player-tabs,
  .viewer-tabs { justify-content: flex-start; justify-items: start; }
  .g1-player .skeleton-player-stage { min-height: 480px; }
}
.overview-facts { margin: 1.1rem 0 1.25rem; }
.g1-mesh-player { padding: 0; overflow: hidden; }
.g1-mesh-frame { width: 100%; height: min(82vh, 900px); min-height: 720px; border: 0; border-radius: inherit; background: #fffafd; }
.scaling-card {
  margin: 0 0 clamp(1rem, 2vw, 1.6rem);
  padding: clamp(1rem, 1.5vw, 1.5rem);
  overflow: hidden;
}
.scaling-card-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1rem;
}
.scaling-card-head > div:first-child { max-width: 820px; }
.scaling-card-head h3 { font-size: clamp(1.45rem, 2.1vw, 2.25rem); margin-bottom: .35rem; }
.scaling-card-head p:not(.eyebrow) { margin: 0; font-size: .94rem; }
.scaling-kpis {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .55rem;
}
.scaling-kpis span {
  display: grid;
  gap: .08rem;
  min-width: 138px;
  padding: .68rem .8rem;
  border: 1px solid rgba(176,68,244,.16);
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(176,68,244,.07), rgba(240,107,168,.06));
  color: var(--muted);
  font-size: .78rem;
  font-weight: 760;
}
.scaling-kpis b { color: var(--ink); font-size: 1rem; }
.scaling-chart-scroll {
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid rgba(176,68,244,.12);
  border-radius: 22px;
  background: #fffafd;
  scrollbar-color: rgba(176,68,244,.34) transparent;
}
.scaling-chart-scroll:focus-visible {
  outline: 3px solid rgba(176,68,244,.28);
  outline-offset: 3px;
}
.scaling-chart-scroll svg {
  display: block;
  width: 100%;
  min-width: 1080px;
  height: auto;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}
.scaling-panel-bg {
  fill: rgba(255,255,255,.86);
  stroke: rgba(154,75,139,.11);
}
.scaling-panel-title { fill: var(--ink); font-size: 16px; font-weight: 860; }
.scaling-grid-line { stroke: rgba(102,103,124,.13); stroke-width: 1; }
.scaling-axis,
.scaling-tick { stroke: rgba(24,24,39,.42); stroke-width: 1.1; }
.scaling-axis-label { fill: rgba(74,74,93,.74); font-size: 10.5px; font-weight: 700; }
.scaling-x-title { fill: rgba(74,74,93,.78); font-size: 11px; font-weight: 760; }
.scaling-variance-band { opacity: .18; }
.scaling-mean-line {
  fill: none;
  stroke-width: 3.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.scaling-point { stroke: white; stroke-width: 2; }
.scaling-value-label { font-size: 10.5px; font-weight: 880; paint-order: stroke; stroke: white; stroke-width: 3px; stroke-linejoin: round; }
.scaling-card figcaption {
  padding: .75rem .2rem 0;
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 1180px) {
  .g1-mesh-frame { min-height: 620px; height: 78vh; }
  .scaling-card-head { align-items: flex-start; flex-direction: column; }
  .scaling-kpis { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .scaling-card { margin-inline: -2vw; padding: .85rem; border-radius: 22px; }
  .scaling-card-head { gap: .85rem; }
  .scaling-kpis { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  .scaling-kpis span { min-width: 0; }
  .scaling-chart-scroll svg { min-width: 1060px; }
}

/* V1.7: cleaner Frame-LU mini pipeline, replacing repeated arrow chips. */
.pipeline.pipeline-flow {
  position: relative;
  display: grid;
  gap: .68rem;
  align-content: center;
  padding: 1.15rem;
  overflow: hidden;
}
.pipeline.pipeline-flow::before {
  content: "";
  position: absolute;
  left: 2.18rem;
  top: 2.15rem;
  bottom: 2.15rem;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(176,68,244,.46), rgba(240,107,168,.16));
}
.pipeline.pipeline-flow .flow-step {
  position: relative;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: center;
  gap: .72rem;
  border: 1px solid rgba(176,68,244,.16);
  border-radius: 18px;
  padding: .72rem .78rem;
  background: rgba(255,255,255,.78);
  box-shadow: 0 10px 26px rgba(104,44,98,.055);
}
.pipeline.pipeline-flow .flow-step small {
  position: relative;
  z-index: 1;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: white;
  font-size: .72rem;
  font-weight: 920;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  box-shadow: 0 8px 22px rgba(176,68,244,.18);
}
.pipeline.pipeline-flow .flow-step b {
  font-size: .98rem;
  line-height: 1.15;
  letter-spacing: -.02em;
}

/* V1.8: real BVH playback in the Frame-LU browser. */
.skeleton-card.has-frame-lu-player {
  display: block;
  padding: .78rem;
  background: linear-gradient(135deg, rgba(176,68,244,.055), rgba(240,107,168,.065));
}
.frame-lu-player { display: grid; gap: .78rem; }
.frame-lu-player-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.frame-lu-player-head strong { font-size: 1.08rem; }
.frame-lu-player-head p { margin: .3rem 0 0; color: var(--muted); line-height: 1.45; }
.frame-lu-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .42rem;
  max-width: 42%;
}
.frame-lu-meta span {
  border: 1px solid rgba(176,68,244,.15);
  border-radius: 999px;
  padding: .34rem .58rem;
  background: rgba(255,255,255,.72);
  color: var(--muted);
  font-size: .78rem;
  font-weight: 820;
  white-space: nowrap;
}
.frame-lu-stage {
  position: relative;
  min-height: 215px;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(176,68,244,.14);
  background: radial-gradient(circle at 50% 35%, rgba(240,107,168,.13), transparent 38%), #fffafd;
}
.frame-lu-canvas { width: 100%; height: 100%; min-height: inherit; display: block; }
.frame-lu-view-tabs {
  position: absolute;
  top: .72rem;
  right: .72rem;
  z-index: 2;
}
.frame-lu-playbar { margin-top: 0; }
.frame-lu-playbar select {
  border: 1px solid rgba(176,68,244,.18);
  border-radius: 999px;
  padding: .42rem .62rem;
  background: rgba(255,255,255,.86);
  color: var(--ink);
  font-weight: 820;
}

@media (max-width: 900px) {
  .frame-lu-player-head { display: grid; }
  .frame-lu-meta { max-width: none; justify-content: flex-start; }
  .frame-lu-stage { min-height: 160px; }
}

/* Frame-LU browser polish: persistent category rail, cleaner playback header, compact right-side flow. */
.frame-section .browser-grid {
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr) minmax(250px, 310px);
  align-items: start;
  gap: clamp(.9rem, 1.4vw, 1.35rem);
}
.frame-section .family-list {
  position: sticky;
  top: calc(var(--nav-height) + 18px);
  align-self: start;
  max-height: calc(100svh - var(--nav-height) - 44px);
  overflow: auto;
  padding-right: .1rem;
}
.frame-section .family-list button {
  position: relative;
  min-height: 54px;
  color: #4f465d;
  background: rgba(255,255,255,.82);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}
.frame-section .family-list button:hover {
  transform: translateX(3px);
  border-color: rgba(176,68,244,.28);
  background: rgba(255,246,252,.92);
}
.frame-section .family-list button.active {
  color: #21172b;
  background: linear-gradient(135deg, rgba(176,68,244,.13), rgba(240,107,168,.12));
  border-color: rgba(176,68,244,.26);
  box-shadow: inset 5px 0 0 var(--pink), 0 10px 24px rgba(104,44,98,.08);
}
.frame-lu-player-head {
  display: block;
}
.frame-lu-player-head p {
  max-width: 860px;
}
.frame-lu-meta { display: none !important; }
.pipeline.pipeline-flow.frame-flow {
  display: grid;
  align-self: start;
  gap: .9rem;
  padding: 1rem;
  border-radius: 24px;
  background:
    radial-gradient(circle at 92% 8%, rgba(240,107,168,.13), transparent 8rem),
    rgba(255,255,255,.78);
}
.pipeline.pipeline-flow.frame-flow::before { display: none; }
.frame-flow .flow-head {
  display: grid;
  gap: .18rem;
  padding: .2rem .18rem .55rem;
  border-bottom: 1px solid rgba(176,68,244,.14);
}
.frame-flow .flow-head span {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--pink);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.frame-flow .flow-head strong {
  font-size: 1.06rem;
  line-height: 1.15;
  letter-spacing: -.025em;
}
.frame-flow .flow-steps {
  position: relative;
  list-style: none;
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
}
.frame-flow .flow-steps::before {
  content: "";
  position: absolute;
  left: 1.06rem;
  top: 1.15rem;
  bottom: 1.15rem;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(176,68,244,.40), rgba(240,107,168,.18));
}
.frame-flow .flow-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  align-items: center;
  gap: .58rem;
  padding: .58rem .62rem;
  border: 1px solid rgba(176,68,244,.14);
  border-radius: 16px;
  background: rgba(255,255,255,.72);
}
.frame-flow .flow-steps li span {
  z-index: 1;
  width: 2.05rem;
  height: 2.05rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  font-size: .72rem;
  font-weight: 930;
}
.frame-flow .flow-steps li b {
  font-size: .94rem;
  line-height: 1.15;
  letter-spacing: -.015em;
}
@media (max-width: 1180px) {
  .frame-section .browser-grid { grid-template-columns: 1fr; }
  .frame-section .family-list { position: static; max-height: none; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}


/* V1.8 benchmark redesign: visual summary cards over dense tables. */
.benchmark-section .section-heading.compact { max-width: 1180px; }
.benchmark-redesign {
  display: grid;
  grid-template-columns: minmax(360px, .68fr) minmax(0, 1.32fr);
  gap: clamp(1rem, 1.6vw, 1.45rem);
  align-items: stretch;
}
.benchmark-hero-card {
  display: grid;
  grid-row: span 2;
  gap: 1.05rem;
  align-content: space-between;
  overflow: hidden;
  background:
    radial-gradient(circle at 22% 10%, rgba(240,107,168,.18), transparent 13rem),
    radial-gradient(circle at 92% 88%, rgba(176,68,244,.14), transparent 14rem),
    rgba(255,255,255,.82);
}
.benchmark-kpi-main span,
.benchmark-card-head p,
.precision-label span,
.object-compare-name span { color: var(--muted); }
.benchmark-kpi-main span {
  display: block;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .76rem;
}
.benchmark-kpi-main strong {
  display: block;
  margin: .16rem 0 0;
  font-size: clamp(4.9rem, 8vw, 8.5rem);
  line-height: .84;
  letter-spacing: -.085em;
  color: transparent;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
}
.benchmark-kpi-main em {
  display: block;
  color: #43364d;
  font-style: normal;
  font-weight: 850;
  font-size: 1.05rem;
}
.coverage-rings {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .85rem;
}
.coverage-ring {
  aspect-ratio: 1;
  min-height: 154px;
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  border-radius: 999px;
  border: 1px solid rgba(176,68,244,.16);
  box-shadow: inset 0 0 0 13px rgba(255,255,255,.78), 0 18px 38px rgba(104,44,98,.08);
}
.ring-primary { background: conic-gradient(from 220deg, rgba(176,68,244,.92) 0 84%, rgba(238,217,238,.9) 84% 100%); }
.ring-secondary { background: conic-gradient(from 220deg, rgba(240,107,168,.9) 0 38%, rgba(238,217,238,.9) 38% 100%); }
.coverage-ring span { display: block; font-size: clamp(1.55rem, 2vw, 2.25rem); font-weight: 940; color: #21172b; line-height: 1; }
.coverage-ring small { display: block; max-width: 110px; margin-top: .32rem; color: #5f536b; font-weight: 760; line-height: 1.18; }
.benchmark-mini-stats { display: grid; gap: .52rem; }
.benchmark-mini-stats span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid rgba(176,68,244,.13);
  border-radius: 16px;
  padding: .68rem .78rem;
  background: rgba(255,255,255,.68);
  color: var(--muted);
  font-weight: 760;
}
.benchmark-mini-stats b { color: var(--ink); font-size: 1.02rem; }
.benchmark-visual-card,
.benchmark-table-card {
  min-width: 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,250,253,.88));
}
.benchmark-card-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.2rem;
  margin-bottom: 1rem;
}
.benchmark-card-head h3 { margin: 0; }
.benchmark-card-head p { margin: 0; max-width: 620px; font-size: .98rem; line-height: 1.45; }
.precision-bars { display: grid; gap: .72rem; }
.precision-row {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  align-items: center;
  gap: .8rem;
}
.precision-label strong { display: block; font-size: 1.06rem; letter-spacing: -.03em; }
.precision-label span { display: block; font-size: .82rem; font-weight: 760; }
.precision-track {
  display: grid;
  gap: .28rem;
  padding: .38rem;
  border-radius: 16px;
  background: linear-gradient(90deg, rgba(176,68,244,.055), rgba(240,107,168,.045));
  border: 1px solid rgba(176,68,244,.10);
}
.precision-line {
  min-width: max-content;
  height: 26px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  padding: 0 .72rem;
  color: #fff;
  font-weight: 880;
  font-size: .82rem;
  white-space: nowrap;
  box-shadow: 0 10px 22px rgba(104,44,98,.10);
}
.hiphi-line { background: linear-gradient(90deg, var(--purple), var(--pink)); }
.baseline-line { background: linear-gradient(90deg, rgba(93,78,108,.54), rgba(154,75,139,.38)); }
.object-benchmark-bars { display: grid; gap: .58rem; }
.object-compare-row {
  display: grid;
  grid-template-columns: minmax(128px, .75fr) minmax(120px, 1fr) minmax(124px, .82fr) minmax(124px, .82fr);
  align-items: center;
  gap: .65rem;
  border: 1px solid rgba(176,68,244,.11);
  border-radius: 18px;
  padding: .66rem .72rem;
  background: rgba(255,255,255,.72);
}
.object-compare-row.is-hiphi {
  border-color: rgba(176,68,244,.26);
  background: linear-gradient(135deg, rgba(176,68,244,.10), rgba(240,107,168,.075));
}
.object-compare-name strong { display: block; font-size: .96rem; line-height: 1.15; }
.object-compare-name span { display: block; margin-top: .18rem; font-size: .82rem; font-weight: 780; }
.object-duration-track {
  height: 13px;
  border-radius: 999px;
  background: rgba(216,184,221,.34);
  overflow: hidden;
}
.object-duration-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--purple), var(--pink));
}
.quality-pill {
  position: relative;
  overflow: hidden;
  min-height: 34px;
  display: flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid rgba(176,68,244,.13);
  background: rgba(255,255,255,.64);
}
.quality-pill span {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(176,68,244,.23), rgba(240,107,168,.19));
}
.quality-pill.near span { background: linear-gradient(90deg, rgba(240,107,168,.24), rgba(255,154,200,.20)); }
.quality-pill b {
  position: relative;
  z-index: 1;
  padding: 0 .68rem;
  font-size: .8rem;
  white-space: nowrap;
}
.benchmark-table-card { grid-column: 1 / -1; }
.benchmark-table-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(360px, .75fr);
  gap: 1rem;
  align-items: start;
}
.benchmark-table-card table { font-size: .86rem; }
.benchmark-table-card th,
.benchmark-table-card td { padding: .48rem .5rem; }

@media (max-width: 1180px) {
  .benchmark-redesign { grid-template-columns: 1fr; }
  .benchmark-hero-card { grid-row: auto; }
  .benchmark-table-columns { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .benchmark-card-head { display: grid; align-items: start; }
  .precision-row,
  .object-compare-row { grid-template-columns: 1fr; }
  .coverage-rings { grid-template-columns: 1fr 1fr; }
  .coverage-ring { min-height: 128px; }
}

/* V1.9 release redesign: align width with benchmark and use the full section span. */
.release-section {
  display: grid;
  gap: clamp(1rem, 1.5vw, 1.4rem);
}
.release-top {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(360px, .52fr);
  gap: clamp(1rem, 1.6vw, 1.45rem);
  align-items: stretch;
}
.release-section .release-copy {
  max-width: 1160px;
}
.release-status-card {
  display: grid;
  align-content: center;
  gap: .36rem;
  min-height: 170px;
  background:
    radial-gradient(circle at 92% 12%, rgba(240,107,168,.18), transparent 10rem),
    linear-gradient(135deg, rgba(176,68,244,.08), rgba(255,255,255,.78));
}
.release-status-card span {
  color: var(--purple);
  font-weight: 920;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: .75rem;
}
.release-status-card strong {
  font-size: clamp(1.65rem, 2.3vw, 2.55rem);
  line-height: .98;
  letter-spacing: -.055em;
}
.release-status-card p { margin: .2rem 0 0; }
.release-grid-wide {
  display: grid;
  grid-template-columns: minmax(320px, .62fr) minmax(0, 1.18fr) minmax(300px, .52fr);
  gap: clamp(1rem, 1.6vw, 1.45rem);
  max-width: none;
  margin-left: 0;
  align-items: stretch;
}
.release-grid-single { max-width: none; }
.release-list.card {
  min-width: 0;
  background: linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,250,253,.88));
}
.release-format-list {
  list-style: none;
  display: grid;
  gap: .62rem;
  margin: .75rem 0 0;
  padding: 0;
  color: inherit;
}
.release-format-list li {
  display: grid;
  gap: .08rem;
  padding: .72rem .78rem;
  border: 1px solid rgba(176,68,244,.12);
  border-radius: 16px;
  background: rgba(255,255,255,.68);
}
.release-format-list b { color: var(--ink); letter-spacing: -.018em; }
.release-format-list span { color: var(--muted); font-size: .88rem; font-weight: 720; }
.release-metadata-card {
  display: grid;
  align-content: start;
}
.release-field-grid.field-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .72rem;
  line-height: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.release-field-grid span {
  display: inline-flex;
  align-items: center;
  min-height: 2.15rem;
  padding: .5rem .64rem;
  border-radius: 999px;
  background: rgba(255,255,255,.82);
  border: 1px solid rgba(176,68,244,.12);
  color: #513f5f;
  font-size: .84rem;
  white-space: nowrap;
}
.release-license-card {
  display: grid;
  align-content: space-between;
  gap: 1rem;
  background:
    radial-gradient(circle at 18% 8%, rgba(176,68,244,.13), transparent 10rem),
    linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,250,253,.88));
}
@media (max-width: 1180px) {
  .release-top,
  .release-grid-wide { grid-template-columns: 1fr; }
}

/* V2 release detail cleanup: remove status-card column and stack release details vertically. */
.release-top {
  display: block;
}
.release-section .release-copy {
  max-width: 1320px;
}
.release-grid-wide {
  grid-template-columns: 1fr;
  max-width: 1320px;
  margin-left: 0;
  margin-right: auto;
}
.release-list.card {
  min-height: auto;
}
.release-format-list {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}
.release-metadata-card,
.release-license-card {
  align-content: start;
}
.release-license-card {
  display: block;
}
@media (max-width: 1100px) {
  .release-format-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  html, body { max-width: 100%; overflow-x: hidden; }
  .hero-title-cover { padding-inline: 3vw; }
  .hero-title-cover .hero-shell,
  .hero-main-titleonly,
  .hero-main-titleonly .hero-copy {
    width: 100%;
    min-width: 0;
  }
  .hero-title-cover h2,
  .hero-title-cover .hero-lede,
  .paper-byline {
    width: calc(100vw - 2rem);
    max-width: calc(100vw - 2rem);
    min-width: 0;
  }
  .hero-title-cover h2 {
    font-size: clamp(1.8rem, 7.8vw, 2.2rem);
    letter-spacing: -.05em;
    overflow-wrap: anywhere;
  }
  .hero-title-cover .hero-lede { font-size: 1.05rem; line-height: 1.5; }
  .hero-title-cover .title-lines span { white-space: normal; }
  .project-links {
    width: min(100%, 360px);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .6rem;
  }
  .project-links .btn { width: 100%; min-width: 0; }
  .project-links .btn:last-child { grid-column: 1 / -1; width: calc(50% - .3rem); justify-self: center; }
  .paper-byline { gap: .75rem; }
  .author-list { max-width: 100%; font-size: .95rem; line-height: 1.62; overflow-wrap: anywhere; }
  .affiliation-list { gap: .32rem .7rem; font-size: .74rem; }
  .release-format-list { grid-template-columns: 1fr; }
}

/* Keep release cards aligned to the same full section width as other full-page blocks. */
.release-grid-wide {
  max-width: none;
  width: 100%;
  margin-right: 0;
}

/* Final paper citation block. */
.citation-section {
  padding-top: 4rem;
}
.citation-section .section-heading {
  margin-bottom: 1.2rem;
}
.citation-paper-link {
  color: #822eb5;
  font-weight: 850;
  text-decoration: underline;
  text-decoration-color: rgba(130,46,181,.35);
  text-underline-offset: .16em;
}
.citation-paper-link:hover {
  text-decoration-color: currentColor;
}
.citation-paper-link:focus-visible {
  outline: 2px solid rgba(176,68,244,.45);
  outline-offset: 3px;
  border-radius: .2em;
}
.citation-card {
  padding: clamp(1rem, 1.7vw, 1.5rem);
  background:
    radial-gradient(circle at 90% 0, rgba(240,107,168,.12), transparent 20rem),
    rgba(255,255,255,.9);
}
.citation-card pre {
  margin: 0;
  padding: clamp(1rem, 1.8vw, 1.5rem);
  overflow-x: auto;
  border-radius: 20px;
  background: #171522;
  color: #f8f2fb;
  font: 600 clamp(.76rem, .8vw, .9rem)/1.65 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  tab-size: 2;
}
.citation-card pre:focus-visible {
  outline: 3px solid rgba(176,68,244,.45);
  outline-offset: 3px;
}

/* V2.1 mobile layout: real single-column flow, iPhone safe areas, and touch targets. */
@media (max-width: 760px) {
  :root {
    --mobile-gutter: 1rem;
    --nav-height: 60px;
  }

  html {
    scroll-padding-top: calc(var(--nav-height) + env(safe-area-inset-top) + 12px);
  }
  body {
    width: 100%;
    min-width: 0;
    overflow-x: clip;
  }
  .site-header {
    padding-top: env(safe-area-inset-top);
  }
  .site-section {
    scroll-margin-top: calc(var(--nav-height) + env(safe-area-inset-top) + 12px);
  }
  .content-grid,
  .wide-grid,
  .hero-shell,
  .nav-shell {
    width: auto;
    max-width: none;
    margin-left: max(var(--mobile-gutter), env(safe-area-inset-left));
    margin-right: max(var(--mobile-gutter), env(safe-area-inset-right));
  }
  main,
  .site-section,
  .hero-main,
  .hero-copy,
  .overview-copy,
  .overview-cards,
  .section-heading,
  .interaction-layout,
  .object-card,
  .benchmark-redesign,
  .release-grid,
  .citation-card {
    min-width: 0;
  }

  .nav-shell {
    min-height: var(--nav-height);
    padding-block: .45rem;
  }
  .nav-toggle {
    width: 44px;
    height: 44px;
    padding: 0;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    touch-action: manipulation;
  }
  .nav-links {
    top: calc(100% - 2px);
    left: max(var(--mobile-gutter), env(safe-area-inset-left));
    right: max(var(--mobile-gutter), env(safe-area-inset-right));
    justify-content: stretch;
    align-items: stretch;
    gap: .25rem;
    max-height: calc(100dvh - var(--nav-height) - env(safe-area-inset-top) - 12px);
    overflow-y: auto;
    overscroll-behavior: contain;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(24px);
    padding-bottom: max(.8rem, env(safe-area-inset-bottom));
  }
  .nav-links a {
    width: 100%;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-inline: 1rem;
  }

  .section-pad { padding-block: clamp(3.4rem, 8svh, 4.6rem); }
  .hero-title-cover {
    min-height: auto;
    padding: clamp(3.2rem, 8svh, 4.8rem) 0 clamp(3rem, 7svh, 4.2rem);
  }
  .hero-title-cover .hero-shell,
  .hero-main-titleonly,
  .hero-main-titleonly .hero-copy,
  .hero-title-cover h2,
  .paper-byline,
  .project-links {
    width: 100%;
    max-width: 100%;
  }
  .hero-title-cover h1 {
    font-size: clamp(4.5rem, 24vw, 6.2rem);
  }
  .project-links .btn,
  .btn {
    min-height: 44px;
    touch-action: manipulation;
  }

  .overview-grid.site-section,
  .atlas-heading,
  .frame-section .browser-grid,
  .object-section .interaction-layout,
  .benchmark-redesign,
  .benchmark-table-columns,
  .release-grid,
  .release-grid-wide {
    grid-template-columns: minmax(0, 1fr);
  }
  .overview-grid.site-section { gap: 1.5rem; }
  .overview-video { width: 100%; }
  .atlas-heading { gap: 1rem; }
  .atlas-metrics { justify-content: flex-start; }
  .atlas-frame-wrap,
  .pipeline-figure { margin-inline: 0; }
  .atlas-frame-wrap iframe {
    height: min(68svh, 540px);
    min-height: 460px;
  }

  .frame-section .family-list {
    grid-template-columns: minmax(0, 1fr);
  }
  .frame-section .family-list button,
  .lu-chip-wrap button,
  .tabs button,
  .player-tabs button,
  .viewer-tabs button,
  .playbar .btn,
  .playbar select,
  .speed-control select,
  .frame-lu-playbar select {
    min-height: 44px;
    touch-action: manipulation;
  }
  .viewer-tabs button { min-width: 44px; }
  .tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .object-player-layout,
  .object-kv { grid-template-columns: minmax(0, 1fr); }
  .object-skeleton-stage,
  .skeleton-player-stage { min-height: 300px; }
  .playbar input[type="range"] { min-height: 44px; }
  select { font-size: 16px; }

  .g1-mesh-frame {
    height: min(70svh, 560px);
    min-height: 420px;
  }
  .scaling-chart-scroll,
  .table-wrap,
  .citation-card pre {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-inline: contain;
  }
  .scaling-chart-scroll { touch-action: pan-x; }
  .citation-card { padding: .75rem; }
  .citation-card pre { max-width: 100%; }
  .site-footer {
    padding-bottom: max(2rem, env(safe-area-inset-bottom));
  }
}