:root {
  color-scheme: dark;
  --bg: #090a0d;
  --bg-elevated: rgba(18, 20, 26, 0.84);
  --bg-elevated-strong: rgba(22, 24, 31, 0.94);
  --line: rgba(171, 229, 255, 0.14);
  --line-strong: rgba(81, 212, 255, 0.28);
  --text: #f2f6fb;
  --muted: #bcc5d3;
  --accent: #51d4ff;
  --accent-strong: #2eaadc;
  --accent-warm: #ffb15e;
  --accent-mint: #77e2c1;
  --shadow: 0 24px 60px rgba(1, 6, 18, 0.55);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, #090a0d 0%, #11131a 48%, #0b0c10 100%),
    repeating-linear-gradient(
      90deg,
      rgba(81, 212, 255, 0.04) 0,
      rgba(81, 212, 255, 0.04) 1px,
      transparent 1px,
      transparent 84px
    ),
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.025) 0,
      rgba(255, 255, 255, 0.025) 1px,
      transparent 1px,
      transparent 84px
    );
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
}

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

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

.page-shell {
  width: min(1200px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.topbar,
.panel {
  backdrop-filter: blur(18px);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 22px;
  border-radius: 20px;
}

.brand-title,
.hero h2,
.section-heading h2,
.footer h2 {
  margin: 0;
  font-family: "Chakra Petch", sans-serif;
  letter-spacing: 0;
}

.brand-title {
  font-size: 1.8rem;
}

.brand-subtitle,
.section-copy,
.panel-note {
  color: var(--muted);
}

.eyebrow,
.panel-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.74rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.repo-link,
.nav-link,
.lang-toggle button,
.primary-cta,
.secondary-cta {
  border-radius: 999px;
  font-size: 0.92rem;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.repo-link {
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
}

.nav-link {
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.lang-toggle {
  display: inline-flex;
  gap: 8px;
}

.lang-toggle button {
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.lang-toggle button.is-active {
  background: var(--accent-strong);
  border-color: transparent;
}

.hero {
  padding: 22px 0 0;
}

.hero-grid,
.section-grid {
  display: grid;
  gap: 18px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
}

.hero-copy {
  min-height: 420px;
}

.panel {
  border-radius: var(--radius);
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    var(--bg-elevated);
}

.hero-copy h2 {
  max-width: 11ch;
  font-size: 4.5rem;
  line-height: 0.96;
}

.hero-text {
  max-width: 38rem;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.primary-cta,
.secondary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
}

.primary-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #ffffff;
}

.secondary-cta {
  background: rgba(255, 255, 255, 0.03);
}

.hero-panels {
  display: grid;
  gap: 18px;
}

.docs-main {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.docs-hero,
.docs-section {
  display: grid;
  gap: 18px;
}

.docs-callout-grid,
.docs-flow-grid,
.docs-detail-grid,
.docs-repo-grid {
  display: grid;
  gap: 12px;
}

.docs-callout-grid,
.docs-flow-grid,
.docs-detail-grid,
.docs-repo-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.docs-command-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 18px;
  align-items: start;
}

.docs-shell .topbar-actions {
  align-items: stretch;
}

.docs-bullet-list {
  display: grid;
  gap: 12px;
}

.docs-repo-grid h3,
.docs-callout-grid h3,
.docs-flow-grid h3,
.docs-detail-grid h3,
.docs-bullet-list h3,
.note-grid h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.docs-repo-grid p,
.docs-callout-grid p,
.docs-flow-grid p,
.docs-detail-grid p,
.docs-bullet-list p,
.note-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.stats-grid,
.note-grid,
.footer-links {
  display: grid;
  gap: 12px;
}

.stats-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-card,
.note-card {
  border-radius: 14px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-value {
  display: block;
  font-family: "Chakra Petch", sans-serif;
  font-size: 1.6rem;
}

.stat-label {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.architecture-visual {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.branch {
  display: grid;
  gap: 10px;
}

.branch span,
.merge-node {
  min-height: 48px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}

.merge-node {
  padding: 0 14px;
  color: var(--accent-warm);
}

.section-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.code-block {
  overflow-x: auto;
  margin: 18px 0 0;
  padding: 18px;
  border-radius: 16px;
  border: 1px solid rgba(81, 212, 255, 0.14);
  background: rgba(8, 10, 14, 0.92);
  color: #d9f4ff;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  line-height: 1.6;
}

.note-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.curve-panel {
  margin-top: 18px;
}

.curve-figure {
  margin: 18px 0 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.footer {
  margin-top: 18px;
  display: grid;
  gap: 18px;
}

.footer-links {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.footer-links a {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.repo-link:hover,
.nav-link:hover,
.lang-toggle button:hover,
.primary-cta:hover,
.secondary-cta:hover,
.footer-links a:hover {
  transform: translateY(-1px);
}

@media (max-width: 1100px) {
  .hero-grid,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h2 {
    font-size: 3.6rem;
  }

  .docs-command-grid,
  .docs-callout-grid,
  .docs-flow-grid,
  .docs-detail-grid,
  .docs-repo-grid {
    grid-template-columns: 1fr;
  }

  .footer-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 100%);
    padding-top: 12px;
  }

  .topbar,
  .panel {
    padding: 18px;
  }

  .topbar {
    align-items: stretch;
  }

  .brand-title {
    font-size: 1.5rem;
  }

  .topbar-actions {
    justify-content: flex-start;
  }

  .hero-copy h2 {
    font-size: 2.4rem;
  }

  .nav-link,
  .repo-link,
  .primary-cta,
  .secondary-cta {
    width: 100%;
  }

  .stats-grid,
  .docs-callout-grid,
  .docs-flow-grid,
  .docs-detail-grid,
  .docs-repo-grid,
  .note-grid,
  .footer-links {
    grid-template-columns: 1fr;
  }

  .architecture-visual {
    grid-template-columns: 1fr;
  }
}