:root {
  --bg: #0A131C;
  --bg-2: #0E1A25;
  --line: rgba(147, 164, 179, .18);
  --cyan: #00E5FF;
  --text: #E8EEF3;
  --muted: #93A4B3;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--cyan); }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

.nav { position: sticky; top: 0; z-index: 10; background: rgba(10, 19, 28, .88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 600; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand small { font: 500 11px/1 var(--mono); color: var(--cyan); letter-spacing: .08em; }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button { background: none; border: 0; color: var(--muted); font: 500 12px/1 var(--mono); padding: 8px 10px; cursor: pointer; }
.lang button[aria-pressed="true"] { background: rgba(0, 229, 255, .14); color: var(--cyan); }
.lang button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

.doc { max-width: 760px; margin: 0 auto; padding: 64px 24px 96px; }
.doc .back { display: inline-block; margin-bottom: 28px; font: 500 13px/1 var(--mono); text-decoration: none; }
.doc h1 { margin: 0; font-size: clamp(32px, 5vw, 46px); line-height: 1.15; letter-spacing: -.015em; }
.doc .updated { margin: 12px 0 36px; font: 400 13px/1.4 var(--mono); color: var(--muted); }
.doc h2 { margin: 40px 0 12px; font-size: 21px; line-height: 1.3; }
.doc p, .doc li { color: #C8D3DC; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc .callout { margin: 20px 0; padding: 18px 20px; border-radius: 12px; border: 1px solid rgba(0, 229, 255, .35); background: rgba(0, 229, 255, .06); }
.doc .callout p { margin: 0; color: var(--text); }
.doc address { font-style: normal; color: #C8D3DC; }

footer { padding: 32px 0 44px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 24px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover, footer a[aria-current="page"] { color: var(--text); }