:root {
  color-scheme: light;
  --ink: #151a1d;
  --muted: #5b676a;
  --paper: #f6f8f7;
  --surface: #ffffff;
  --line: #d7dfda;
  --forest: #1f6f5b;
  --forest-dark: #164d43;
  --clay: #a65337;
  --sky: #467d9f;
  --gold: #c89736;
  --code: #111618;
  --shadow: 0 24px 80px rgba(21, 26, 29, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 36px;
  background: rgba(246, 248, 247, 0.92);
  border-bottom: 1px solid rgba(21, 26, 29, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  font-weight: 800;
  font-size: 1.05rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

nav a {
  padding: 10px 0;
}

nav a:hover,
nav a:focus-visible {
  color: var(--forest);
}

.hero {
  position: relative;
  display: block;
  padding: 88px 36px 72px;
  overflow: hidden;
  background: #fff;
  border-bottom: 1px solid rgba(21, 26, 29, 0.08);
}

.hero-content {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 0;
  color: var(--ink);
  text-align: center;
}

.paper-status,
.eyebrow {
  margin: 0 0 14px;
  color: var(--forest);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  max-width: 1040px;
  margin: 0 auto;
  font-size: 5.8rem;
  line-height: 0.95;
  font-weight: 860;
}

.hero-subtitle {
  max-width: 780px;
  margin: 20px auto 0;
  font-size: 1.72rem;
  line-height: 1.24;
  font-weight: 650;
}

.authors {
  margin: 28px 0 0;
  color: var(--muted);
  font-weight: 700;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.link-row a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 118px;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--forest-dark);
  font-weight: 800;
}

.link-row a:hover,
.link-row a:focus-visible {
  background: var(--forest);
  color: #fff;
}

.teaser-figure {
  overflow: hidden;
  width: min(1040px, 100%);
  margin: 44px auto 0;
  padding: 16px;
  border: 1px solid rgba(21, 26, 29, 0.1);
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 20px 58px rgba(21, 26, 29, 0.11);
}

.teaser-image {
  width: 100%;
  height: auto;
  border-radius: 4px;
  background: #fff;
}

.teaser-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  min-height: 380px;
  gap: 10px;
  padding: 30px;
  color: var(--muted);
  background:
    linear-gradient(135deg, rgba(31, 111, 91, 0.08), rgba(70, 125, 159, 0.08)),
    #fff;
}

.teaser-placeholder strong {
  color: var(--ink);
  font-size: 1.35rem;
}

.teaser-placeholder code {
  color: var(--forest-dark);
  font-weight: 800;
}

.section,
.viewer-band {
  padding: 88px 36px;
}

.section {
  background: var(--paper);
}

.section-intro {
  padding-top: 72px;
  background: #fff;
}

.section-heading,
.text-columns,
.stat-grid,
.pipeline,
.synthetic-grid,
.result-grid,
.ablation-grid,
.release-grid,
.table-wrap,
.citation-section pre {
  width: min(1120px, 100%);
  margin-right: auto;
  margin-left: auto;
}

.section-heading {
  margin-bottom: 30px;
}

.section-heading h2 {
  margin: 0;
  font-size: 2.55rem;
  line-height: 1.08;
}

.section-heading p:not(.eyebrow) {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.abstract-section .section-heading,
.abstract-section .abstract-text {
  width: min(1120px, 100%);
  margin-right: auto;
  margin-left: auto;
  text-align: left;
}

.abstract-text {
  margin-top: 0;
  margin-bottom: 0;
  padding-right: min(18vw, 220px);
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.78;
}

.text-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
}

.text-columns p,
.pipeline p,
.ablation-grid p,
.release-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.74;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 42px;
}

.stat-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(21, 26, 29, 0.06);
}

.stat-grid strong {
  display: block;
  margin-bottom: 12px;
  color: var(--forest-dark);
  font-size: 2.45rem;
  line-height: 1;
}

.stat-grid span {
  display: block;
  color: var(--muted);
  line-height: 1.55;
}

.synthetic-section {
  background: var(--paper);
}

.synthetic-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.synthetic-grid figure {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(21, 26, 29, 0.06);
}

.synthetic-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: #dfe7e4;
}

.viewer-band {
  background: #111719;
  color: #fff;
}

.viewer-band .section-heading .eyebrow {
  color: #7ed6b4;
}

.viewer-band .section-heading p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.68);
}

.viewer-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(210px, 0.3fr);
  gap: 34px;
  width: min(1120px, 100%);
  margin: 0 auto;
  align-items: start;
}

.viewer-panel {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: #0c1113;
  box-shadow: var(--shadow);
}

#terrain-viewer {
  position: absolute;
  inset: 0;
}

#terrain-viewer canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.viewer-error {
  display: grid;
  min-height: 100%;
  margin: 0;
  place-items: center;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 800;
}

.viewer-settings {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.model-list {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.model-list-label {
  padding: 10px 14px 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.model-list button {
  padding: 11px 14px;
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: rgba(255, 255, 255, 0.78);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.model-list button.is-active {
  background: #f5faf7;
  color: #102320;
}

.model-list button:focus-visible {
  outline: 3px solid rgba(126, 214, 180, 0.75);
  outline-offset: -3px;
}

.button-group {
  display: flex;
  overflow: hidden;
  min-height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.button-group button {
  flex: 1;
  min-width: 0;
  min-height: 40px;
  padding: 0 14px;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
}

.button-group button:last-child {
  border-right: 0;
}

.button-group button.is-active {
  background: #f5faf7;
  color: #102320;
}

.button-group button:focus-visible {
  outline: 3px solid rgba(126, 214, 180, 0.75);
  outline-offset: -3px;
}

.button-group button:disabled {
  opacity: 0.32;
  cursor: not-allowed;
}

.pipeline,
.release-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.pipeline article,
.ablation-grid article,
.release-grid article,
.result-grid figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(21, 26, 29, 0.06);
}

.pipeline article,
.ablation-grid article,
.release-grid article {
  padding: 24px;
}

.pipeline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 26px;
  border-radius: 50%;
  background: rgba(31, 111, 91, 0.12);
  color: var(--forest);
  font-weight: 900;
}

.pipeline h3,
.ablation-grid h3,
.release-grid h3 {
  margin: 0 0 12px;
  font-size: 1.24rem;
}

.release-grid .release-link {
  margin-top: 16px;
}

.release-grid .release-link a {
  color: var(--forest-dark);
  font-weight: 800;
  border-bottom: 1px solid rgba(31, 111, 91, 0.35);
}

.release-grid .release-link a:hover,
.release-grid .release-link a:focus-visible {
  color: var(--forest);
  border-bottom-color: var(--forest);
}

.table-wrap {
  overflow-x: auto;
  margin-bottom: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(21, 26, 29, 0.06);
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 0.94rem;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  white-space: nowrap;
}

th:first-child,
td:first-child {
  text-align: left;
  white-space: normal;
}

th {
  background: #e7efeb;
  color: var(--forest-dark);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.highlight-row td {
  background: rgba(31, 111, 91, 0.1);
  color: var(--forest-dark);
  font-weight: 850;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.result-grid figure {
  overflow: hidden;
}

.result-grid img {
  width: 100%;
  aspect-ratio: 1.55;
  object-fit: cover;
  background: #dfe7e4;
}

.wide-figure {
  grid-column: 1 / -1;
}

.wide-figure img {
  aspect-ratio: 2.85;
}

figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 750;
}

.reproduce-section {
  background: var(--paper);
}

.ablation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.citation-section {
  background: #151a1d;
  color: #fff;
}

.citation-section .eyebrow {
  color: #7ed6b4;
}

.citation-section pre {
  overflow-x: auto;
  padding: 24px;
  border-radius: 8px;
  background: var(--code);
  color: #d8f2e8;
  line-height: 1.6;
}

footer {
  padding: 30px 36px 42px;
  background: #151a1d;
  color: rgba(255, 255, 255, 0.62);
  text-align: center;
}

footer p {
  width: min(760px, 100%);
  margin: 0 auto;
  line-height: 1.6;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    min-height: auto;
    padding: 16px 22px;
  }

  nav {
    width: 100%;
    overflow-x: auto;
    gap: 18px;
    padding-bottom: 2px;
  }

  .hero {
    padding: 70px 22px 62px;
  }

  .hero-content {
    width: min(100% - 36px, 720px);
  }

  h1 {
    font-size: 4.15rem;
  }

  .hero-subtitle {
    font-size: 1.35rem;
  }

  .teaser-placeholder {
    min-height: 280px;
  }

  .section,
  .viewer-band {
    padding: 64px 22px;
  }

  .abstract-text {
    padding-right: 0;
  }

  .section-heading h2 {
    font-size: 2.05rem;
  }

  .text-columns,
  .stat-grid,
  .viewer-layout,
  .pipeline,
  .synthetic-grid,
  .ablation-grid,
  .release-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .viewer-panel {
    min-height: 520px;
  }

  .wide-figure {
    grid-column: auto;
  }

  .wide-figure img {
    aspect-ratio: 1.55;
  }
}

@media (max-width: 560px) {
  .hero {
    padding-top: 56px;
  }

  h1 {
    font-size: 3.2rem;
  }

  .hero-subtitle {
    font-size: 1.18rem;
  }

  .link-row a {
    flex: 1 1 calc(50% - 8px);
    min-width: 0;
  }

  .teaser-placeholder {
    min-height: 220px;
  }

  .viewer-panel {
    min-height: 460px;
  }

  .button-group button {
    padding: 0 8px;
    font-size: 0.82rem;
  }
}