:root {
  color-scheme: light dark;
  --brand: #405bea;
  --background: #f7f8fc;
  --surface: #ffffff;
  --surface-alt: #eef1f8;
  --text-primary: #151827;
  --text-secondary: #656d82;
  --outline: #dce1ec;
  --outline-strong: #aab2c4;
  --content-width: 800px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text-primary);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--brand);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.08em;
}

a:hover {
  text-decoration-thickness: 0.12em;
}

a:focus-visible {
  border-radius: 4px;
  outline: 3px solid var(--brand);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-primary);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-bottom: 1px solid var(--outline);
  background: var(--surface);
}

.header-inner,
.page,
.site-footer-inner {
  width: min(100% - 40px, var(--content-width));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-size: 1.18rem;
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

.site-nav a {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--brand);
}

.page {
  padding-block: 72px 88px;
}

.home-intro {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-block: 0;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 720px;
  font-size: clamp(2.25rem, 7vw, 3.35rem);
  font-weight: 850;
  letter-spacing: -0.035em;
}

h2 {
  margin-top: 48px;
  font-size: 1.45rem;
  font-weight: 750;
  letter-spacing: -0.015em;
}

h3 {
  margin-top: 32px;
  font-size: 1.08rem;
}

p,
ul,
ol {
  margin-block: 16px 0;
}

ul,
ol {
  padding-left: 1.4em;
}

li + li {
  margin-top: 8px;
}

.lead {
  max-width: 650px;
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: 1.08rem;
}

.document-list {
  margin-top: 56px;
  border-top: 1px solid var(--outline);
}

.document-link {
  display: grid;
  min-height: 104px;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--outline);
  color: var(--text-primary);
  text-decoration: none;
}

.document-link strong,
.document-link small {
  display: block;
}

.document-link strong {
  font-size: 1.08rem;
}

.document-link small {
  margin-top: 4px;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.document-link .arrow {
  color: var(--brand);
  font-size: 1.35rem;
}

.privacy-note {
  margin-top: 56px;
  padding: 24px;
  border-radius: 12px;
  background: var(--surface-alt);
}

.privacy-note h2 {
  margin: 0;
  font-size: 1.1rem;
}

.privacy-note p {
  color: var(--text-secondary);
}

.back-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  font-weight: 650;
  text-decoration: none;
}

.document-header {
  margin-top: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--outline);
}

.updated {
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.toc {
  margin-top: 40px;
  padding: 24px;
  border-radius: 12px;
  background: var(--surface);
}

.toc h2 {
  margin: 0;
  font-size: 1.08rem;
}

.toc ol {
  columns: 2;
  column-gap: 40px;
}

.toc li {
  break-inside: avoid;
}

.document-body p,
.document-body li {
  color: var(--text-secondary);
}

.document-body code {
  padding: 0.12em 0.34em;
  border-radius: 4px;
  background: var(--surface-alt);
  color: var(--text-primary);
  font-family:
    ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.88em;
}

.document-end {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--outline);
}

.site-footer {
  border-top: 1px solid var(--outline);
  background: var(--surface);
}

.site-footer-inner {
  display: flex;
  min-height: 112px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.site-footer p {
  margin: 0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #8b9dff;
    --background: #0e1020;
    --surface: #171a2b;
    --surface-alt: #22263a;
    --text-primary: #f6f7fc;
    --text-secondary: #a7abbe;
    --outline: #2b3046;
    --outline-strong: #646b86;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media (max-width: 620px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
    padding-block: 12px;
  }

  .site-nav {
    width: 100%;
  }

  .page {
    padding-block: 48px 64px;
  }

  .document-list {
    margin-top: 40px;
  }

  .toc ol {
    columns: 1;
  }

  .site-footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding-block: 24px;
  }
}

@media print {
  :root {
    --background: #fff;
    --text-primary: #000;
    --text-secondary: #333;
  }

  .site-header,
  .site-footer,
  .back-link,
  .toc {
    display: none;
  }

  .page {
    width: 100%;
    padding: 0;
  }

  .document-header {
    margin-top: 0;
  }
}