:root {
  --bg-top: #eaf4ff;
  --bg-mid: #f8fafc;
  --bg-bottom: #ffffff;
  --panel-bg: rgba(255, 255, 255, 0.94);
  --panel-border: rgba(148, 163, 184, 0.24);
  --panel-shadow: 0 20px 70px rgba(15, 23, 42, 0.08);
  --sidebar-shadow: 0 16px 50px rgba(15, 23, 42, 0.06);
  --text-main: #0f172a;
  --text-body: #334155;
  --text-soft: #475569;
  --text-muted: #64748b;
  --brand: #2563eb;
  --brand-soft: #dbeafe;
  --brand-deep: #1d4ed8;
  --accent: #0f766e;
  --code-bg: #f8fafc;
  --code-border: rgba(148, 163, 184, 0.24);
  --heading-font: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --body-font: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono-font: "SFMono-Regular", "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at top left, rgba(96, 165, 250, 0.14), transparent 28%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 28%, var(--bg-bottom) 100%);
  color: var(--text-body);
  font-family: var(--body-font);
}

a {
  color: var(--brand-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

a:hover {
  color: #1e40af;
}

div.bodywrapper {
  box-shadow: none;
}

div.document {
  background: transparent;
}

div.body {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 30px;
  box-shadow: var(--panel-shadow);
  padding: 2.5rem 2.9rem 2.8rem;
}

div.body p,
div.body li {
  font-size: 1.02rem;
  line-height: 1.82;
  color: var(--text-body);
}

div.body li {
  margin-bottom: 0.2rem;
}

div.body h1,
div.body h2,
div.body h3,
div.body h4,
div.body h5 {
  color: var(--text-main);
  font-family: var(--heading-font);
  font-weight: 700;
  letter-spacing: -0.02em;
}

div.body h1 {
  font-size: clamp(1.9rem, 2.6vw, 2.7rem);
  line-height: 1.02;
  margin-bottom: 0.8rem;
}

div.body h2 {
  font-size: 1.95rem;
  line-height: 1.08;
  margin-top: 2.6rem;
  margin-bottom: 0.7rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid rgba(191, 219, 254, 0.75);
}

div.body h3 {
  font-size: 1.38rem;
  margin-top: 2rem;
  margin-bottom: 0.45rem;
}

div.body h4 {
  font-size: 1.08rem;
  margin-top: 1.5rem;
  margin-bottom: 0.35rem;
}

div.body p.caption,
div.body span.caption-text {
  color: var(--text-muted);
  font-size: 0.94rem;
}

div.sphinxsidebar {
  background: transparent;
  padding-top: 1rem;
}

div.sphinxsidebarwrapper {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--sidebar-shadow);
  padding: 1.25rem 1.1rem;
}

div.sphinxsidebarwrapper h1.logo {
  margin-bottom: 0.6rem;
}

div.sphinxsidebarwrapper h1.logo img {
  max-width: 94px;
  border-radius: 18px;
}

div.sphinxsidebarwrapper p.logo {
  display: none;
}

div.sphinxsidebarwrapper h3,
div.sphinxsidebarwrapper h4 {
  color: var(--text-main);
  font-family: var(--body-font);
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

div.sphinxsidebarwrapper ul {
  margin-top: 0.35rem;
}

div.sphinxsidebarwrapper li {
  margin: 0.2rem 0;
  line-height: 1.45;
}

div.sphinxsidebarwrapper a {
  color: var(--text-soft);
}

div.sphinxsidebarwrapper a:hover {
  color: var(--brand-deep);
}

.language-switch {
  margin: 0 0 1rem;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.language-switch .language-current {
  color: var(--text-main);
  font-weight: 700;
}

.language-switch .language-separator {
  margin: 0 0.35rem;
  color: var(--text-muted);
}

.sidebar-about {
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  margin-bottom: 1rem;
}

.sidebar-about p {
  margin: 0.55rem 0 0;
  line-height: 1.6;
  color: var(--text-soft);
  font-size: 0.96rem;
}

.sidebar-about .sidebar-kicker {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  font-weight: 700;
}

.sidebar-about .sidebar-link {
  display: inline-block;
  margin-top: 0.8rem;
  color: var(--text-main);
  font-weight: 700;
}

.sidebar-about .sidebar-languages {
  margin-top: 0.65rem;
  font-size: 0.9rem;
}

.sidebar-about .sidebar-languages span {
  color: var(--text-muted);
  margin: 0 0.2rem;
}

.landing-hero {
  padding: 1.2rem 0 0.4rem;
}

.index div.body > h1:first-of-type,
body.index div.body > h1:first-of-type {
  color: var(--text-muted);
  font-family: var(--body-font);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.landing-kicker {
  display: inline-block;
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 0.35rem;
}

.landing-hero h1 {
  margin: 0.15rem 0 0.8rem;
  font-size: clamp(2.15rem, 3.3vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
  max-width: 18ch;
}

.landing-lead {
  max-width: 50rem;
  font-size: 0.98rem;
  line-height: 1.72;
  color: var(--text-soft);
  font-weight: 600;
}

.landing-tagline {
  margin: 0.35rem 0 1.2rem;
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-main);
  font-weight: 700;
}

.landing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.8rem 0 2rem;
}

.landing-visual {
  margin: 1.4rem 0 2.2rem;
}

.landing-visual img {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98));
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.08);
  display: block;
  max-width: 100%;
  width: 100%;
}

.landing-visual-caption {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 0.8rem 0 0;
  max-width: 48rem;
}

.landing-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(241, 245, 249, 0.95));
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 1.15rem 1.05rem 1.1rem;
}

.landing-card h3 {
  margin: 0 0 0.45rem;
  font-family: var(--body-font);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--text-main);
}

.landing-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.65;
  font-size: 0.96rem;
}

.section-note {
  color: var(--text-soft);
  line-height: 1.75;
}

.docutils.literal,
code,
tt {
  background: rgba(226, 232, 240, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 8px;
  color: #0f172a;
  font-family: var(--mono-font);
  font-size: 0.92em;
  padding: 0.14rem 0.42rem;
}

div.highlight,
pre,
div.literal-block-wrapper {
  border-radius: 18px;
}

div.highlight pre {
  background: linear-gradient(180deg, #f8fbff 0%, #f8fafc 100%);
  border: 1px solid var(--code-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
  color: #0f172a;
  font-family: var(--mono-font);
  font-size: 0.95rem;
  line-height: 1.72;
  padding: 1.15rem 1.2rem;
}

div.literal-block-wrapper div.code-block-caption {
  background: transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0 0 0.45rem 0.15rem;
  text-transform: uppercase;
}

blockquote {
  border-left: 4px solid rgba(37, 99, 235, 0.2);
  color: var(--text-soft);
  margin: 1.2rem 0;
  padding-left: 1rem;
}

table.docutils {
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.simulation-preview {
  margin: 1.5rem 0 2rem;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 60%);
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
}

.simulation-preview .preview-top {
  padding: 1.2rem 1.3rem 0.6rem;
}

.simulation-preview .preview-kicker {
  color: var(--brand);
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.simulation-preview .preview-title {
  margin: 0.3rem 0 0.5rem;
  font-family: var(--heading-font);
  font-size: 1.45rem;
  font-weight: 700;
}

.simulation-preview .preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.simulation-preview .preview-chip {
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  padding: 0.38rem 0.7rem;
}

.simulation-preview .preview-body {
  padding: 0.7rem 1.3rem 1.3rem;
}

.simulation-preview .preview-row {
  margin-top: 0.8rem;
}

.simulation-preview .preview-label {
  margin-bottom: 0.35rem;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-main);
}

.simulation-preview .preview-track {
  position: relative;
  height: 22px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(191, 219, 254, 0.52), rgba(219, 234, 254, 0.9));
  border: 1px solid rgba(191, 219, 254, 0.9);
  overflow: hidden;
}

.simulation-preview .preview-segment {
  position: absolute;
  top: 3px;
  bottom: 3px;
  border-radius: 999px;
}

.simulation-preview .train {
  background: var(--brand-deep);
}

.simulation-preview .validation {
  background: #d97706;
}

.simulation-preview .test {
  background: #059669;
}

.api-lead {
  color: var(--text-soft);
  line-height: 1.75;
  max-width: 52rem;
  font-size: 1rem;
}

div.admonition,
div.note,
div.warning,
div.tip {
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.96), rgba(255, 255, 255, 0.98));
  border: 1px solid rgba(147, 197, 253, 0.42);
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
  padding: 0.9rem 1rem;
}

div.admonition p.admonition-title,
div.note p.admonition-title,
div.warning p.admonition-title,
div.tip p.admonition-title {
  color: var(--brand-deep);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

dl.field-list {
  border-top: 1px solid rgba(191, 219, 254, 0.65);
  margin-top: 1rem;
  padding-top: 1rem;
}

dl.field-list > dt {
  color: var(--text-main);
  font-weight: 800;
}

dl.class > dt,
dl.function > dt,
dl.method > dt {
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.9), rgba(255, 255, 255, 0.98));
  border: 1px solid rgba(147, 197, 253, 0.35);
  border-radius: 14px;
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.04);
  color: var(--text-main);
  padding: 0.85rem 0.95rem;
}

dl.class > dd,
dl.function > dd,
dl.method > dd {
  margin-bottom: 1.4rem;
}

.example-block,
.example-callout {
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.96), rgba(255, 255, 255, 1));
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
  margin: 1.25rem 0 1.8rem;
  padding: 1rem 1.1rem 0.3rem;
}

.example-block > p:first-child,
.example-callout > p:first-child {
  color: var(--brand-deep);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.benchmark-grid {
  display: grid;
  gap: 1rem;
  margin: 1.4rem 0 1.9rem;
}

.benchmark-row {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98));
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
  padding: 1rem 1rem 0.95rem;
}

.benchmark-label {
  color: var(--text-main);
  font-family: var(--heading-font);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.benchmark-bars {
  display: grid;
  gap: 0.65rem;
}

.benchmark-bar {
  align-items: center;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 72px minmax(140px, 1fr) 74px;
}

.benchmark-name {
  color: var(--text-main);
  font-size: 0.92rem;
  font-weight: 700;
}

.benchmark-track {
  background: rgba(226, 232, 240, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  display: block;
  height: 14px;
  overflow: hidden;
}

.benchmark-fill {
  border-radius: 999px;
  display: block;
  height: 100%;
}

.benchmark-fill.pandas {
  background: linear-gradient(90deg, #1d4ed8, #60a5fa);
}

.benchmark-fill.numpy {
  background: linear-gradient(90deg, #0f766e, #2dd4bf);
}

.benchmark-fill.polars {
  background: linear-gradient(90deg, #d97706, #fbbf24);
}

.benchmark-value {
  color: var(--text-soft);
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

table.docutils td,
table.docutils th {
  padding: 0.72rem 0.82rem;
}

table.docutils th {
  background: rgba(219, 234, 254, 0.55);
  color: var(--text-main);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

table.docutils td {
  background: rgba(255, 255, 255, 0.96);
}

hr.docutils {
  border: 0;
  border-top: 1px solid rgba(191, 219, 254, 0.75);
  margin: 2rem 0;
}

@media (max-width: 900px) {
  div.body {
    padding: 1.7rem 1.3rem;
    border-radius: 20px;
  }

  div.body h1 {
    font-size: 1.7rem;
  }

  div.body h2 {
    font-size: 1.55rem;
  }

  .landing-hero h1 {
    font-size: 2.1rem;
  }

  .benchmark-bar {
    gap: 0.45rem;
    grid-template-columns: 64px minmax(120px, 1fr) 62px;
  }
}