:root {
  color-scheme: dark;
  --bg: #07090f;
  --bg-elevated: #0d111a;
  --panel: #111722;
  --panel-strong: #151d2a;
  --text: #eef4ff;
  --muted: #a9b5c7;
  --soft: #6f7c90;
  --line: rgba(199, 218, 255, 0.16);
  --line-strong: rgba(199, 218, 255, 0.28);
  --cyan: #58d7ef;
  --mint: #7de0b5;
  --amber: #e6bf6a;
  --rose: #e98080;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
  background:
    linear-gradient(180deg, rgba(88, 215, 239, 0.08) 0%, rgba(7, 9, 15, 0) 28rem),
    linear-gradient(90deg, rgba(125, 224, 181, 0.07), rgba(230, 191, 106, 0.04) 48%, rgba(233, 128, 128, 0.06)),
    var(--bg);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    linear-gradient(rgba(199, 218, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 218, 255, 0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.2) 48rem, transparent);
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

::selection {
  color: #ffffff;
  background: rgba(88, 215, 239, 0.35);
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(199, 218, 255, 0.1);
  background: rgba(7, 9, 15, 0.76);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  font-weight: 800;
  letter-spacing: 0;
  color: #ffffff;
}

.reconstruction-note {
  position: absolute;
  top: 5rem;
  left: clamp(1rem, 4vw, 3rem);
  z-index: 1;
  max-width: min(18rem, calc(100% - 2rem));
  margin: 0;
  color: #fff2cf;
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 2vw, 1.35rem);
  font-size: 0.92rem;
  color: var(--muted);
}

.nav-links a {
  padding: 0.45rem 0;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
}

.hero {
  position: relative;
  display: flex;
  min-height: 100vh;
  align-items: center;
  overflow: hidden;
  padding: 7rem clamp(1rem, 4vw, 3rem) 4rem;
}

.hero-grid {
  position: absolute;
  inset: 5rem clamp(1rem, 4vw, 4rem) 3rem;
  z-index: -1;
  border: 1px solid rgba(199, 218, 255, 0.1);
  background:
    linear-gradient(90deg, rgba(88, 215, 239, 0.08), transparent 35%, rgba(230, 191, 106, 0.08)),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 32px);
  opacity: 0.72;
}

.hero-inner {
  width: min(100%, 1120px);
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  overflow-wrap: break-word;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 1080px;
  margin: 0 auto;
  font-size: 5.2rem;
  line-height: 1;
  letter-spacing: 0;
  text-wrap: balance;
  overflow-wrap: break-word;
}

.title-part {
  display: inline;
}

.subtitle {
  max-width: 850px;
  margin: 1.75rem auto 0;
  color: #d7e2f1;
  font-size: 1.25rem;
  line-height: 1.65;
  text-wrap: balance;
}

.authors {
  max-width: 960px;
  margin: 2rem auto 0;
  color: #f7fbff;
  font-size: 1.1rem;
}

.affiliation {
  margin: 0.45rem auto 0;
  color: var(--muted);
  font-size: 1rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 2.3rem;
}

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--text);
  background: rgba(17, 23, 34, 0.9);
  font-weight: 750;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button span {
  color: var(--soft);
  font-size: 0.82rem;
  font-weight: 650;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(88, 215, 239, 0.65);
  background: rgba(20, 31, 45, 0.95);
}

.button-primary {
  border-color: rgba(88, 215, 239, 0.55);
  background: linear-gradient(135deg, rgba(88, 215, 239, 0.22), rgba(125, 224, 181, 0.12));
}

.section {
  width: min(100% - 2rem, 1180px);
  margin: 0 auto;
  padding: clamp(4.5rem, 8vw, 7.5rem) 0;
}

.section-heading {
  max-width: 850px;
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin: 0;
  font-size: 3.1rem;
  line-height: 1.08;
  letter-spacing: 0;
  text-wrap: balance;
}

.benchmark-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(1.4rem, 4vw, 3rem);
  align-items: start;
}

.figure-panel {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.figure-panel img {
  display: block;
  width: 100%;
  height: auto;
  background: #ffffff;
}

.figure-panel.wide {
  margin-bottom: 1.5rem;
}

.video-panel {
  width: min(100%, 980px);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #000000;
  box-shadow: var(--shadow);
}

.video-panel video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000000;
}

.realworld-video-panel {
  width: min(100%, 520px);
  justify-self: end;
  margin: 0;
}

.realworld-video-panel video {
  aspect-ratio: 3 / 4;
  object-fit: contain;
}

.realworld-video-caption {
  padding: 0.75rem 1rem 0.9rem;
  color: var(--soft);
  background: #000000;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.35;
  text-align: center;
}

#teaser-video .section-heading {
  width: min(100%, 980px);
  max-width: none;
  margin: 0 auto 1.25rem;
  text-align: center;
}

#teaser-video .section-heading h2 {
  font-size: clamp(2.1rem, 4vw, 2.85rem);
}

.teaser-summary {
  width: min(100%, 980px);
  margin: 0 auto 1.5rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
  text-align: left;
}

.teaser-summary p {
  margin: 0;
}

.teaser-summary p + p {
  margin-top: 0.9rem;
}

.demo-note {
  margin: 1rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid rgba(88, 215, 239, 0.38);
  color: var(--soft);
  font-size: 0.95rem;
  line-height: 1.55;
}

.demo-shell {
  --demo-card-size: 12rem;
  --demo-card-half-size: 6rem;
  --demo-card-gap: 0.6rem;
  --demo-list-visible-height: calc(
    var(--demo-card-size) + var(--demo-card-gap) +
    var(--demo-card-size) + var(--demo-card-gap) +
    var(--demo-card-size) + var(--demo-card-gap) +
    var(--demo-card-half-size)
  );
  display: grid;
  grid-template-columns: minmax(10rem, var(--demo-card-size)) minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.demo-case-list {
  display: flex;
  flex-direction: column;
  gap: var(--demo-card-gap);
  min-width: 0;
  max-height: var(--demo-list-visible-height);
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 0.2rem;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.demo-case-list::-webkit-scrollbar {
  display: none;
}

.demo-loading,
.demo-case-button,
.demo-viewer-panel,
.demo-joint-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(17, 23, 34, 0.86);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
}

.demo-loading {
  padding: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.demo-case-button {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 100%;
  height: var(--demo-card-size);
  aspect-ratio: 1;
  min-height: 0;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.demo-case-button:hover,
.demo-case-button:focus-visible,
.demo-case-button.is-active {
  border-color: rgba(88, 215, 239, 0.65);
  background: rgba(20, 31, 45, 0.95);
}

.demo-case-button:hover,
.demo-case-button:focus-visible {
  transform: translateY(-2px);
}

.demo-case-button img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.demo-case-thumb {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #ffffff;
}

.demo-case-thumb-fallback {
  color: #101722;
  font-size: 1rem;
  font-weight: 850;
}

.demo-case-title {
  position: absolute;
  inset: auto 0 0;
  display: block;
  min-width: 0;
  padding: 1.75rem 0.75rem 0.75rem;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 750;
  line-height: 1.25;
  background: linear-gradient(180deg, transparent, rgba(5, 7, 13, 0.88) 54%, rgba(5, 7, 13, 0.96));
  overflow: hidden;
  overflow-wrap: anywhere;
  opacity: 0;
  transform: translateY(0.35rem);
  transition: opacity 160ms ease, transform 160ms ease;
}

.demo-case-button:hover .demo-case-title,
.demo-case-button:focus-visible .demo-case-title {
  opacity: 1;
  transform: translateY(0);
}

.demo-viewer-panel {
  min-width: 0;
  overflow: hidden;
}

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

.demo-viewer-header h3 {
  margin-bottom: 0.3rem;
  font-size: 1.35rem;
  line-height: 1.2;
}

.demo-viewer-header p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.demo-kicker,
.demo-panel-title {
  margin: 0 0 0.35rem;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.demo-reset-button {
  flex: 0 0 auto;
  min-height: 2.4rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--text);
  background: rgba(7, 9, 15, 0.72);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 750;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.demo-reset-button:hover,
.demo-reset-button:focus-visible {
  border-color: rgba(88, 215, 239, 0.65);
  background: rgba(20, 31, 45, 0.95);
}

.demo-stage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 19rem);
  min-height: 34rem;
}

.demo-stage {
  position: relative;
  min-width: 0;
  min-height: 34rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 18%, rgba(88, 215, 239, 0.14), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 48%),
    #05070d;
  touch-action: none;
}

.demo-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.demo-stage-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  color: var(--muted);
  text-align: center;
}

.demo-stage-placeholder span {
  max-width: 22rem;
}

.demo-joint-panel {
  min-width: 0;
  max-height: 34rem;
  overflow-y: auto;
  padding: 1rem;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  border-radius: 0;
  background: rgba(7, 9, 15, 0.64);
  box-shadow: none;
}

.demo-panel-empty {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.demo-joint-control {
  padding: 0.75rem 0;
  border-top: 1px solid rgba(199, 218, 255, 0.12);
}

.demo-joint-control:first-of-type {
  border-top: 0;
}

.demo-joint-control label {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 750;
  line-height: 1.25;
}

.demo-joint-name {
  min-width: 0;
  overflow-wrap: anywhere;
}

.demo-joint-control input[type="range"] {
  width: 100%;
  margin-top: 0.65rem;
  accent-color: var(--cyan);
}

.demo-status {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.demo-status.is-error {
  color: #ffd3d3;
  background: rgba(233, 128, 128, 0.08);
}

.method-intro {
  max-width: 850px;
  margin: -0.85rem 0 1.5rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.step-grid article,
.data-table,
.benchmark-stats div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(17, 23, 34, 0.86);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
}

.step-grid h3,
.data-table h3 {
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
  line-height: 1.25;
}

.step-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.step-grid article {
  padding: 1rem;
}

.step-grid span {
  display: block;
  margin-bottom: 0.65rem;
  color: var(--amber);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.result-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  align-items: start;
  width: min(100%, 1020px);
  margin-inline: auto;
}

.result-gallery .figure-panel {
  width: 100%;
  background: #ffffff;
  margin-inline: auto;
}

.result-gallery img {
  background: #ffffff;
}

.result-gallery .scene-reconstruction-figure,
.result-gallery .real-captured-reconstruction-panel {
  max-width: 760px;
  margin-inline: auto;
  background: #000000;
}

.scene-reconstruction-figure img,
.real-captured-reconstruction-panel img {
  background: #000000;
}

.scene-reconstruction-caption {
  padding: 0.85rem 1rem 1rem;
  color: var(--soft);
  background: #000000;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.35;
  text-align: center;
}

.real-captured-reconstruction-panel {
  width: 100%;
}

.real-captured-media-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  align-items: stretch;
  background: #000000;
}

.real-captured-media-row img,
.real-captured-media-row video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000000;
}

.real-captured-media-row img {
  aspect-ratio: 1566 / 2087;
}

.real-captured-media-row video {
  aspect-ratio: 3 / 4;
}

.table-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.data-table {
  min-width: 0;
  padding: 1rem;
}

.data-table h3 {
  color: var(--text);
}

.table-wrap {
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 610px;
  border-collapse: collapse;
  color: #dbe6f6;
  font-size: 0.9rem;
}

th,
td {
  padding: 0.66rem 0.7rem;
  border-bottom: 1px solid rgba(199, 218, 255, 0.12);
  text-align: left;
  white-space: nowrap;
}

th {
  color: #f6f9ff;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.04);
}

.appearance-table table {
  min-width: 980px;
}

.articulation-table table {
  min-width: 760px;
}

.appearance-table thead tr:first-child th {
  text-align: center;
}

.highlight-row {
  color: #ffffff;
  background: rgba(88, 215, 239, 0.1);
}

.highlight-row td:first-child {
  color: var(--mint);
  font-weight: 850;
}

.benchmark-copy {
  color: var(--muted);
}

.benchmark-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.benchmark-stats div {
  padding: 1rem;
}

.benchmark-stats strong {
  display: block;
  color: var(--amber);
  font-size: 2.35rem;
  line-height: 1;
}

.benchmark-stats span {
  display: block;
  margin-top: 0.55rem;
  color: var(--muted);
}

.bibtex {
  overflow-x: auto;
  margin: 0;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #d9f6ff;
  background: #0b1018;
  box-shadow: var(--shadow);
  font-size: 0.92rem;
  line-height: 1.55;
}

.footer {
  width: min(100% - 2rem, 1180px);
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--soft);
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 980px) {
  h1 {
    font-size: 4.2rem;
  }

  .section-heading h2 {
    font-size: 2.45rem;
  }

  .benchmark-layout,
  .table-grid,
  .demo-shell,
  .demo-stage-layout {
    grid-template-columns: 1fr;
  }

  .demo-shell {
    --demo-card-size: min(12rem, 46vw);
    --demo-card-half-size: min(6rem, 23vw);
  }

  .demo-case-list {
    flex-direction: column;
    max-height: var(--demo-list-visible-height);
    overflow-x: hidden;
    overflow-y: auto;
    padding-bottom: 0;
  }

  .demo-case-button {
    width: var(--demo-card-size);
    min-height: 0;
  }

  .demo-joint-panel {
    max-height: 20rem;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .real-captured-media-row {
    grid-template-columns: 1fr;
  }

  .real-captured-media-row video {
    width: min(100%, 24rem);
    justify-self: center;
  }

  .realworld-video-panel {
    justify-self: center;
  }

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

@media (max-width: 700px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    font-size: 0.86rem;
  }

  .hero {
    padding-top: 10rem;
  }

  .hero-grid {
    inset: 8.4rem 1rem 2rem;
  }

  .reconstruction-note {
    top: 9.1rem;
  }

  .button {
    width: 100%;
  }

  .demo-viewer-header {
    flex-direction: column;
  }

  .demo-reset-button {
    width: 100%;
  }

  .demo-stage {
    min-height: 24rem;
  }

  .step-grid,
  .benchmark-stats {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 21rem;
    font-size: 2rem;
    line-height: 1.08;
    text-wrap: wrap;
  }

  .title-part {
    display: block;
  }

  .subtitle {
    max-width: 21rem;
    font-size: 1rem;
    line-height: 1.55;
  }

  .eyebrow {
    max-width: 20rem;
    margin-inline: auto;
    font-size: 0.68rem;
    line-height: 1.4;
    text-wrap: balance;
  }

  .authors,
  .affiliation {
    max-width: 21rem;
    font-size: 0.94rem;
    overflow-wrap: break-word;
  }

  .section-heading h2 {
    font-size: 1.85rem;
  }

}