:root {
  --ink: #121417;
  --muted: #5d6571;
  --paper: #f5f9ff;
  --paper-soft: #eaf3ff;
  --line: rgba(18, 20, 23, 0.13);
  --blue: #174ea6;
  --blue-soft: #dce9ff;
  --cyan: #55b7ff;
  --red: #d94835;
  --green: #1d7d5c;
  --shadow: 0 24px 80px rgba(32, 45, 65, 0.15);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(23, 78, 166, 0.18), transparent 28rem),
    radial-gradient(circle at 95% 18%, rgba(85, 183, 255, 0.24), transparent 24rem),
    linear-gradient(180deg, #ffffff 0%, var(--paper) 48%, #f8fbff 100%);
  font-family: "IBM Plex Sans", sans-serif;
}

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

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

.page-shell {
  min-height: auto;
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 94px 10px 34px;
  text-align: center;
}

.venue,
.kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2 {
  margin: 0;
  font-family: "Crimson Pro", serif;
  letter-spacing: -0.045em;
}

h1 {
  max-width: 980px;
  margin: 0 auto;
  font-size: clamp(2.7rem, 6.2vw, 4rem);
  line-height: 0.96;
}

h2 {
  font-size: clamp(2.05rem, 4.7vw, 2.5rem);
  line-height: 0.98;
}

h3 {
  margin: 0;
  font-size: 1.24rem;
  letter-spacing: -0.02em;
}

h4 {
  margin: 0 0 8px;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
}

.authors {
  max-width: 850px;
  margin: 28px auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  color: #26313d;
  font-weight: 600;
}

.authors sup,
.affiliations sup {
  color: var(--blue);
  font-weight: 700;
}

.affiliations {
  margin: 12px auto 0;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.55;
}

.button-row {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.pill {
  min-width: 104px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.64);
  color: #222832;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.pill:hover {
  transform: translateY(-2px);
  border-color: rgba(23, 78, 166, 0.34);
  box-shadow: var(--shadow);
}

.pill.primary {
  color: #fff;
  background: var(--ink);
}

.hero-panel {
  max-width: 520px;
  margin: 54px auto 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.dataset-metrics {
  max-width: 520px;
  margin: 28px auto 0;
}

.metric-card {
  padding: 18px 16px;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 24px;
  background: rgba(248, 251, 255, 0.84);
  box-shadow: 0 18px 48px rgba(20, 30, 44, 0.12);
}

.metric-value {
  display: block;
  color: var(--blue);
  font-family: "Crimson Pro", serif;
  font-size: 2.45rem;
  font-weight: 750;
  line-height: 0.9;
}

.metric-label {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-weight: 600;
}

.video-card {
  margin-top: 30px;
}

.video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 20px;
  box-shadow: var(--shadow);
  background: #061426;
}

.dataset-video {
  margin-top: 28px;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 82px 26px;
}

.section-title {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.section-title.compact {
  display: block;
  max-width: 880px;
}

.track-card p,
.semantic-items p,
.footer {
  color: var(--muted);
  line-height: 1.72;
}

.track-grid {
  margin-top: 30px;
  display: grid;
  grid-template-columns: 0.6fr 1.4fr;
  gap: 18px;
}

.track-card {
  min-height: 246px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(234, 243, 255, 0.9)),
    var(--paper-soft);
  box-shadow: 0 14px 42px rgba(32, 45, 65, 0.08);
  position: relative;
  overflow: hidden;
}

.track-card::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  opacity: 0.24;
}

.track-card.collision::after {
  background: var(--red);
}

.track-card.semantic::after {
  background: var(--blue);
}

.semantic-items {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.semantic-items > div {
  padding: 16px;
  border: 1px solid rgba(23, 78, 166, 0.13);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.55);
}

.semantic-items p {
  margin: 0;
  font-size: 0.96rem;
}

.table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: rgba(248, 251, 255, 0.88);
  box-shadow: var(--shadow);
}

.result-block {
  margin-top: 34px;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  white-space: nowrap;
}

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

th {
  color: #303846;
  background: rgba(220, 233, 255, 0.68);
  font-size: 0.88rem;
  font-weight: 700;
}

td {
  color: #27303a;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.94rem;
}

td:first-child {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 700;
}

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

.highlight-row td {
  background: rgba(29, 125, 92, 0.08);
}

.category-row td {
  color: var(--blue);
  background: rgba(220, 233, 255, 0.34);
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.86rem;
  font-style: italic;
  font-weight: 700;
}

code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.65;
}

.footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 26px 60px;
  text-align: center;
}

@media (max-width: 860px) {
  .page-shell {
    min-height: auto;
    padding: 18px;
  }

  .hero {
    padding: 70px 0 36px;
  }

  .hero-panel,
  .track-grid,
  .section-title {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 360px;
  }

  .section {
    padding: 58px 18px;
  }

}

@media (max-width: 520px) {
  h1 {
    font-size: clamp(2.35rem, 11.5vw, 3.4rem);
  }

  .button-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .pill {
    min-width: 0;
  }

  .authors {
    justify-content: flex-start;
    text-align: left;
  }
}