:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --bg-soft: #eef3ff;
  --ink: #102033;
  --muted: #5c6a7f;
  --line: rgba(33, 51, 84, 0.14);
  --card: rgba(255, 255, 255, 0.86);
  --card-solid: #ffffff;
  --accent: #2f6df6;
  --accent-2: #18b7a6;
  --accent-3: #ffb85c;
  --shadow: 0 24px 70px rgba(26, 45, 86, 0.14);
  --radius: 28px;
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 12%, rgba(47, 109, 246, 0.16), transparent 26rem),
    radial-gradient(circle at 82% 8%, rgba(24, 183, 166, 0.13), transparent 28rem),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 38%, #eef3f8 100%);
  color: var(--ink);
  font-family:
    Georgia, "Times New Roman", "Noto Serif", "Liberation Serif", Times, serif;
  line-height: 1.65;
}

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

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

.site-header {
  min-height: 760px;
  overflow: hidden;
  position: relative;
}

.site-header::before,
.site-header::after {
  border: 1px solid rgba(47, 109, 246, 0.18);
  border-radius: 999px;
  content: "";
  height: 520px;
  position: absolute;
  width: 520px;
  z-index: -1;
}

.site-header::before {
  right: -170px;
  top: 140px;
}

.site-header::after {
  bottom: 24px;
  left: -220px;
}

.nav {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 28px 24px 0;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand::before {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(47, 109, 246, 0.25);
  content: "";
  height: 28px;
  margin-right: 10px;
  transform: rotate(12deg);
  width: 28px;
}

.nav-links {
  align-items: center;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 16px 40px rgba(39, 57, 93, 0.08);
  display: flex;
  gap: 4px;
  padding: 7px;
}

.nav-links a {
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 700;
  padding: 9px 15px;
  transition:
    background 180ms ease,
    color 180ms ease;
}

.nav-links a:hover {
  background: var(--ink);
  color: #ffffff;
}

.hero {
  align-items: center;
  display: grid;
  gap: 46px;
  grid-template-columns: minmax(0, 1fr);
  margin: 0 auto;
  max-width: var(--max-width);
  min-height: 560px;
  padding: 72px 24px 88px;
}

.hero-copy {
  margin: 0 auto;
  max-width: 980px;
  position: relative;
  text-align: center;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.83rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.section-kicker {
  color: var(--accent);
  font-weight: 850;
  letter-spacing: 0.08em;
  margin: 0 0 18px;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  letter-spacing: -0.05em;
  line-height: 1;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 24px;
  max-width: 1200px;
}

.authors {
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.32rem);
  font-style: italic;
  letter-spacing: 0.02em;
  margin-bottom: 0;
}

h2 {
  font-size: clamp(2.3rem, 5vw, 4.25rem);
  letter-spacing: -0.055em;
  line-height: 1.02;
  margin-bottom: 22px;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  transition:
    box-shadow 180ms ease,
    transform 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent), #6b7dff);
  box-shadow: 0 18px 34px rgba(47, 109, 246, 0.27);
  color: #ffffff;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  color: var(--ink);
}

main {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 24px 80px;
}

.section {
  margin-bottom: 88px;
}

.section.narrow {
  max-width: 890px;
}

.section p {
  color: var(--muted);
  font-size: 1.04rem;
}

.section .section-kicker {
  color: var(--accent);
  font-size: clamp(1.65rem, 3vw, 2.4rem);
  line-height: 1.1;
  margin-bottom: 22px;
}

/* #abstract {
  text-align: center;
} */

.abstract-card {
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 54px rgba(26, 45, 86, 0.09);
  margin: 0 auto;
  max-width: 980px;
  padding: clamp(24px, 4vw, 44px);
}

.section .abstract-card p {
  font-size: clamp(1.02rem, 1.35vw, 1.18rem);
  font-style: italic;
  margin-bottom: 0;
  /* text-align: center; */
}

.section-heading {
  margin-bottom: 28px;
  max-width: 890px;
}

.method-figure {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 0;
  overflow: hidden;
  padding: clamp(14px, 2vw, 24px);
}

.method-figure img {
  background: #ffffff;
  border-radius: calc(var(--radius) - 10px);
  width: 100%;
}

.method-figure figcaption,
.demo-card figcaption,
caption {
  color: var(--muted);
  font-size: 1rem;
  font-style: italic;
  text-align: center;
}

.method-figure figcaption,
.demo-card figcaption {
  padding: 18px 8px 4px;
}

.demo-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.demo-card {
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 54px rgba(26, 45, 86, 0.09);
  overflow: hidden;
  padding: clamp(14px, 2vw, 20px);
}

.demo-card video {
  aspect-ratio: 16 / 9;
  background: #111827;
  border-radius: calc(var(--radius) - 12px);
  display: block;
  object-fit: cover;
  width: 100%;
}

.demo-card {
  margin: 0;
}

.table-card {
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 54px rgba(26, 45, 86, 0.09);
  margin-top: 24px;
  overflow: hidden;
  padding: clamp(20px, 3vw, 32px);
}

.table-card h3 {
  margin-bottom: 18px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  caption-side: top;
  border-collapse: collapse;
  min-width: 780px;
  width: 100%;
}

caption {
  margin-bottom: 18px;
}

th,
td {
  border-bottom: 1px solid rgba(33, 51, 84, 0.11);
  padding: 15px 16px;
  text-align: left;
  vertical-align: middle;
}

thead th {
  background: #f1f5ff;
  color: #31415a;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

tbody th {
  color: #253349;
  font-weight: 800;
}

tbody td {
  color: #57657b;
}

tbody tr:hover td,
tbody tr:hover th {
  background: #f8fbff;
}

.best {
  color: var(--accent);
  font-weight: 850;
}

pre {
  background: #111827;
  border-radius: 24px;
  box-shadow: 0 18px 46px rgba(17, 24, 39, 0.18);
  color: #dbeafe;
  overflow-x: auto;
  padding: 24px;
  width: 100%;
}

code {
  font-family:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92rem;
}

.footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 28px 24px 42px;
}

.footer p {
  margin-bottom: 0;
}

.footer a {
  color: var(--accent);
  font-weight: 800;
}

@media (max-width: 900px) {
  .site-header {
    min-height: auto;
  }

  .nav {
    align-items: stretch;
    flex-direction: column;
  }

  .nav-links {
    justify-content: space-between;
    overflow-x: auto;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .demo-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .nav,
  .hero,
  main,
  .footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  h1 {
    font-size: clamp(1.9rem, 8.5vw, 2.8rem);
  }

  .hero-actions,
  .footer {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .table-card,
  .abstract-card,
  .demo-card,
  .method-figure {
    border-radius: 22px;
  }
}