:root {
  color-scheme: light dark;
  --background: #f7f8fa;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --border: #e2e4e8;
  --accent: #147a55;
  --accent-soft: #e5f3ed;
  --shadow: 0 1px 3px rgb(18 32 27 / 7%), 0 10px 30px rgb(18 32 27 / 4%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--background); }

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 0.16em; }
a:hover { color: #0c5d3e; }

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -5rem;
  z-index: 10;
  padding: 0.6rem 0.8rem;
  color: white;
  background: var(--accent);
  border-radius: 0.5rem;
}
.skip-link:focus { top: 1rem; }

.site-header {
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}

.site-header__inner, .site-footer, .document {
  width: min(100% - 2rem, 50rem);
  margin-inline: auto;
}

.site-header__inner {
  min-height: 4.3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--text);
  font-weight: 750;
  letter-spacing: -0.025em;
  text-decoration: none;
  white-space: nowrap;
}
.brand span { margin-inline-start: 0.45rem; color: var(--muted); font-weight: 550; }

.document-nav { display: flex; gap: 0.2rem; flex-wrap: wrap; justify-content: flex-end; }
.document-nav a {
  padding: 0.35rem 0.6rem;
  border-radius: 0.45rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
}
.document-nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 650; }

.document { padding-block: clamp(2.5rem, 7vw, 5rem); }
.document article {
  padding: clamp(1.4rem, 4vw, 3rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: var(--shadow);
}
.document h1, .document h2 { line-height: 1.2; letter-spacing: -0.025em; }
.document h1 { margin: 0 0 0.35rem; font-size: clamp(2rem, 7vw, 2.75rem); }
.document h2 { margin-top: 2.4rem; font-size: 1.22rem; }
.document p + h2 { margin-top: 2.6rem; }
.document ul { padding-inline-start: 1.35rem; }
.document li + li { margin-top: 0.35rem; }
.document strong { font-weight: 700; }

.language-switcher {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.35rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.language-switcher > div { display: flex; flex-wrap: wrap; gap: 0.3rem; justify-content: flex-end; }
.language-switcher a {
  padding: 0.15rem 0.35rem;
  border-radius: 0.3rem;
  text-decoration: none;
}
.language-switcher a[aria-current="page"] { color: var(--text); background: var(--surface); font-weight: 700; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.75rem 2.25rem;
  color: var(--muted);
  font-size: 0.86rem;
}

@media (max-width: 33rem) {
  .site-header__inner { padding-block: 0.7rem; align-items: flex-start; flex-direction: column; }
  .document-nav { justify-content: flex-start; }
  .document { padding-top: 1.5rem; }
  .document article { padding: 1.25rem; border-radius: 0.8rem; }
  .language-switcher, .site-footer { align-items: flex-start; flex-direction: column; gap: 0.6rem; }
  .language-switcher > div { justify-content: flex-start; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #111514;
    --surface: #181d1b;
    --text: #eff4f1;
    --muted: #afb9b4;
    --border: #2e3934;
    --accent: #66d6a9;
    --accent-soft: #193f30;
  }
  a:hover { color: #a1efce; }
}