:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-subtle: #fbfbfc;
  --text: #1f1f1f;
  --muted: #5f6b7a;
  --accent: #005a9e;
  --accent-soft: #eaf2fb;
  --border: #d9dde3;
  --border-strong: #c5ccd6;
  --code-bg: #111827;
  --code-text: #f9fafb;
  --table-stripe: #fafbfd;
  --sidebar-width: 320px;
  --radius-lg: 8px;
  --radius-md: 6px;
  --radius-sm: 4px;
  --font-body: "Segoe UI", SegoeUI, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Segoe UI", SegoeUI, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  padding: 0.08rem 0.32rem;
  border: 1px solid #dbe3ec;
  border-radius: var(--radius-sm);
  background: #f3f6f9;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.94em;
}

pre {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid #0f172a;
  border-radius: var(--radius-md);
  background: var(--code-bg);
  color: var(--code-text);
}

pre code {
  padding: 0;
  border: 0;
  background: transparent;
  border-radius: 0;
  color: inherit;
}

.site-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 1.25rem 1rem;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: #f8f9fb;
}

.brand {
  display: block;
  margin-bottom: 1.25rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #ffffff;
}

.brand-kicker {
  display: block;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-title {
  display: block;
  margin-top: 0.25rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
}

.nav-group + .nav-group {
  margin-top: 1.15rem;
}

.nav-group h2 {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-group ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-group li + li {
  margin-top: 0.15rem;
}

.nav-group a {
  display: block;
  padding: 0.38rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.92rem;
}

.nav-group a:hover {
  background: #eef3f8;
  text-decoration: none;
}

.nav-group a.active {
  background: var(--accent-soft);
  border: 1px solid #c8d9eb;
  color: #003b6f;
  font-weight: 600;
}

.content-shell {
  padding: 1.5rem clamp(1rem, 3vw, 2.5rem) 2.5rem;
}

.page-hero {
  max-width: 980px;
  margin: 0 auto 1rem;
  padding: 0 0 0.75rem;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  line-height: 1.2;
  font-weight: 600;
}

.doc-card {
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(1.15rem, 2.4vw, 1.85rem);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.doc-card h1:first-child {
  display: none;
}

.doc-card h2,
.doc-card h3,
.doc-card h4 {
  margin-top: 1.75rem;
  margin-bottom: 0.7rem;
  font-family: var(--font-display);
  line-height: 1.24;
  font-weight: 600;
}

.doc-card h2 {
  font-size: 1.38rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid #edf0f4;
}

.doc-card h3 {
  font-size: 1.1rem;
}

.doc-card p,
.doc-card ul,
.doc-card ol,
.doc-card table {
  margin: 0.85rem 0;
}

.doc-card ul,
.doc-card ol {
  padding-left: 1.35rem;
}

.doc-card li + li {
  margin-top: 0.28rem;
}

.table-wrap {
  margin: 1.2rem 0;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

thead th {
  background: #f2f4f7;
  font-size: 0.83rem;
  font-weight: 600;
}

tbody tr:nth-child(even) td {
  background: var(--table-stripe);
}

blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  background: #f8fbff;
}

@media (max-width: 980px) {
  .site-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .content-shell {
    padding-top: 1rem;
  }
}

@media (max-width: 640px) {
  .page-hero,
  .doc-card {
    border-radius: var(--radius-md);
  }

  .nav-group a {
    padding-left: 0.55rem;
    padding-right: 0.55rem;
  }

  th,
  td {
    padding: 0.68rem 0.75rem;
  }
}

.landing-body {
  background:
    radial-gradient(circle at top left, #eef5fd 0, #eef5fd 18%, transparent 42%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 22%, #ffffff 100%);
  color: var(--text);
}

.landing-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(217, 221, 227, 0.88);
}

.landing-topbar-inner,
.landing-hero-inner,
.landing-section-inner {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.landing-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.landing-brand {
  color: #0f172a;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.landing-brand:hover {
  text-decoration: none;
}

.landing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.landing-links a {
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 600;
}

.landing-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.landing-main {
  padding-bottom: 5rem;
}

.landing-hero {
  padding: 5rem 0 3rem;
}

.landing-hero-inner {
  padding: clamp(2rem, 4.5vw, 4rem);
  border: 1px solid rgba(197, 204, 214, 0.9);
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(250, 252, 255, 0.98) 0%, rgba(255, 255, 255, 0.98) 100%);
  box-shadow: 0 24px 56px rgba(15, 23, 42, 0.08);
}

.landing-kicker {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.landing-hero h1 {
  max-width: 12ch;
  margin: 0;
  color: #0f172a;
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 7vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
}

.landing-subtitle {
  max-width: 860px;
  margin: 1.1rem 0 0;
  color: #334155;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.6;
}

.landing-intro {
  max-width: 760px;
  margin-top: 1.4rem;
  color: #475569;
  font-size: 1.02rem;
}

.landing-intro p {
  margin: 0.75rem 0;
}

.landing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.landing-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.72rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, color 180ms ease;
}

.landing-button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.landing-button-primary {
  background: linear-gradient(180deg, #0a6cc6 0%, #005a9e 100%);
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(0, 90, 158, 0.22);
}

.landing-button-primary:hover {
  color: #ffffff;
}

.landing-button-secondary {
  border-color: #cfd8e3;
  background: #ffffff;
  color: #0f172a;
}

.landing-section {
  padding: 1.2rem 0;
}

.landing-section-inner {
  padding: clamp(1.35rem, 3vw, 2rem);
  border: 1px solid #dbe3ec;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.05);
}

.landing-section h2 {
  margin-top: 0;
  margin-bottom: 0.9rem;
  color: #0f172a;
  font-size: clamp(1.45rem, 2vw, 1.85rem);
  line-height: 1.2;
}

.landing-section p:first-of-type {
  margin-top: 0;
}

.landing-section ul,
.landing-section ol {
  padding-left: 1.3rem;
}

.landing-section code {
  background: #f4f7fb;
}

.landing-section pre {
  padding: 1rem 1.15rem;
  border: 1px solid #243041;
  border-radius: 12px;
  background: #0f172a;
  color: #f8fafc;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.landing-section pre code {
  background: transparent;
  color: #f8fafc !important;
  font-size: 0.96rem;
  line-height: 1.75;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 700ms ease,
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 80ms;
}

.reveal-delay-2 {
  transition-delay: 150ms;
}

.reveal-delay-3 {
  transition-delay: 220ms;
}

.reveal-delay-4 {
  transition-delay: 290ms;
}

.reveal-delay-5 {
  transition-delay: 360ms;
}

@media (prefers-reduced-motion: reduce) {
  .landing-button,
  .reveal {
    transition: none;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 900px) {
  .landing-topbar-inner {
    min-height: auto;
    padding: 1rem 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .landing-links {
    gap: 0.85rem 1rem;
  }

  .landing-hero {
    padding-top: 3.2rem;
  }
}

@media (max-width: 640px) {
  .landing-topbar-inner,
  .landing-hero-inner,
  .landing-section-inner {
    width: min(1120px, calc(100% - 1rem));
  }

  .landing-hero-inner,
  .landing-section-inner {
    border-radius: 14px;
  }

  .landing-actions {
    flex-direction: column;
  }

  .landing-button {
    width: 100%;
  }
}