:root {
  --ink: #18212b;
  --muted: #5e6976;
  --line: #dce3ea;
  --paper: #f7f9fb;
  --white: #ffffff;
  --teal: #087f83;
  --blue: #1d4f91;
  --gold: #b77812;
  --red: #a43b43;
  --shadow: 0 18px 45px rgba(24, 33, 43, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(220, 227, 234, 0.85);
  background: rgba(247, 249, 251, 0.92);
  backdrop-filter: blur(14px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  white-space: nowrap;
}
.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}
.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  flex-wrap: wrap;
}
.nav-links a:hover { color: var(--teal); }

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  padding: clamp(36px, 6vw, 78px) clamp(20px, 5vw, 72px) 42px;
  background:
    linear-gradient(120deg, rgba(247, 249, 251, 0.96), rgba(247, 249, 251, 0.78)),
    url("../../asserts/agvbench_logo.png") center / contain no-repeat;
  border-bottom: 1px solid var(--line);
}
.hero-copy { max-width: none; width: 100%; }
.paper-title {
  margin: 12px 0 16px;
  max-width: none;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.04;
  letter-spacing: 0;
}
.subtitle {
  max-width: none;
  margin: 0;
  color: #334150;
  font-size: clamp(17px, 2vw, 22px);
}
.author-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0 18px;
  margin-top: 12px;
  color: #263442;
  font-size: 17px;
  font-weight: 750;
}
.author-list > * {
  display: inline-flex;
  align-items: baseline;
  white-space: nowrap;
}
.author-list > * + *::before {
  content: ", ";
  color: inherit;
}
.affiliations,
.contrib-note,
.email-line {
  max-width: none;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  font-weight: 750;
  box-shadow: 0 6px 18px rgba(24, 33, 43, 0.08);
}
.button.primary {
  border-color: var(--teal);
  background: var(--teal);
  color: var(--white);
}

.hero-figure,
.panel,
.stat,
.figure-tile,
.table-wrap {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 30px rgba(24, 33, 43, 0.06);
}
.hero-figure {
  align-self: end;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}
.hero-figure img { width: 100%; background: white; }
.caption {
  margin: 0;
  padding: 12px 16px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
}

main { background: var(--paper); }
section {
  padding: 66px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
}
.wrap {
  max-width: none;
  margin: 0 auto;
}
.section-title {
  margin: 0 0 12px;
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.1;
  letter-spacing: 0;
}
.section-title.tight {
  margin-top: 42px;
  font-size: 28px;
}
.section-lead {
  max-width: none;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 18px;
}
.section-spacer { margin-top: 24px; }
.table-spacer { margin-top: 18px; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.stat {
  min-height: 142px;
  padding: 22px;
}
.stat strong {
  display: block;
  color: var(--blue);
  font-size: 42px;
  line-height: 1;
  margin-bottom: 10px;
}
.stat span {
  color: var(--muted);
  font-weight: 650;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.panel { padding: 24px; }
.panel h3 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.25;
}
.panel p {
  margin: 0;
  color: var(--muted);
}
.single-column {
  display: block;
}
.single-column .panel + .panel {
  margin-top: 18px;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: #e7f3f2;
  color: #075e62;
  font-size: 13px;
  font-weight: 750;
}

.findings { display: block; }
.finding-list {
  display: grid;
  gap: 14px;
}
.finding {
  padding: 18px 20px;
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(24, 33, 43, 0.06);
}
.finding:nth-child(2) { border-left-color: var(--gold); }
.finding:nth-child(3) { border-left-color: var(--red); }
.finding h3 {
  margin: 0 0 6px;
  font-size: 18px;
}
.finding p {
  margin: 0;
  color: var(--muted);
}

.figure-grid { display: block; }
.figure-tile { overflow: hidden; }
.figure-tile img {
  width: 100%;
  min-height: 220px;
  object-fit: contain;
  background: #fff;
}
.result-note {
  color: var(--muted);
  font-size: 14px;
  margin: -10px 0 18px;
}
.highlight {
  color: var(--teal);
  font-weight: 850;
}
.roc-caption { margin: 0; }

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
  font-size: 14px;
}
th, td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  color: #263442;
  background: #edf3f6;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
tr:last-child td { border-bottom: 0; }
.switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 18px;
}
.switch-btn {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--muted);
  font-weight: 800;
  cursor: pointer;
}
.switch-btn.active {
  border-color: var(--teal);
  background: var(--teal);
  color: var(--white);
}

.roc-window {
  max-width: 790px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 30px rgba(24, 33, 43, 0.06);
  overflow: hidden;
}
.roc-window img {
  width: 100%;
  object-fit: contain;
  background: #fff;
}
.roc-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
}
.occlusion-layout,
.code-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 1fr);
  gap: 24px;
  align-items: start;
}
.occlusion-layout { align-items: center; }

code, pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  border-radius: 8px;
  background: #151d26;
  color: #eaf0f5;
  line-height: 1.55;
  box-shadow: var(--shadow);
}
.code-section { display: block; }
.code-layout { margin-top: 22px; }

.footer {
  padding: 36px clamp(20px, 5vw, 72px);
  background: #151d26;
  color: #d8e0e7;
}
.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer a {
  color: #94d3d0;
  font-weight: 700;
}

@media (max-width: 920px) {
  .hero,
  .occlusion-layout,
  .code-layout {
    grid-template-columns: 1fr;
  }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
  .nav-links { justify-content: flex-start; }
  .hero {
    min-height: auto;
    padding-top: 36px;
  }
  .stats { grid-template-columns: 1fr; }
  section {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}