:root {
  --bg: #f4f6f8;
  --paper: #ffffff;
  --ink: #1b2430;
  --muted: #5d6b7a;
  --line: #e3e8ee;
  --brand: #14324f;
  --link: #0d5c45;
  --link-hover: #084433;
  --code: #f3f6f8;
  --warn-bg: #fff8ee;
  --warn-line: #e0a14a;
  --note-bg: #f3f7fb;
  --note-line: #6d8eae;
  --sidebar: 248px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font: 16px/1.6 "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--link-hover); }
.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: #fff;
  padding: 8px 12px;
  z-index: 5;
}
.skip:focus { top: 12px; }
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar);
  flex: 0 0 var(--sidebar);
  background: var(--brand);
  color: #e8eef4;
  padding: 28px 18px 40px;
}
.brand {
  display: block;
  color: #fff;
  font-weight: 650;
  font-size: 18px;
  letter-spacing: 0.01em;
  text-decoration: none;
  margin: 0 10px 6px;
}
.brand small {
  display: block;
  margin-top: 4px;
  color: #b7c6d4;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav { margin: 22px 0 0; padding: 0; list-style: none; }
.nav a {
  display: block;
  color: #d5e0ea;
  text-decoration: none;
  padding: 7px 10px;
  border-radius: 6px;
}
.nav a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.nav a[aria-current="page"] { background: rgba(255,255,255,0.14); color: #fff; }
.main { flex: 1; min-width: 0; }
.wrap { max-width: 820px; margin: 0 auto; padding: 36px 28px 72px; }
.kicker {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; font-weight: 650; }
h2 { font-size: 22px; line-height: 1.3; margin: 36px 0 10px; }
h3 { font-size: 18px; margin: 26px 0 8px; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li + li { margin-top: 4px; }
.lead { font-size: 18px; color: #243140; }
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 22px 6px;
  margin: 18px 0 22px;
}
table { width: 100%; border-collapse: collapse; margin: 0 0 18px; background: var(--paper); }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { font-size: 13px; color: var(--muted); font-weight: 650; background: #f8fafb; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
code { background: var(--code); padding: 0.1em 0.35em; border-radius: 4px; }
pre {
  background: var(--code);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  overflow: auto;
  margin: 0 0 16px;
}
pre code { background: transparent; padding: 0; }
.callout {
  border-left: 4px solid var(--note-line);
  background: var(--note-bg);
  padding: 12px 14px;
  margin: 0 0 16px;
  border-radius: 0 8px 8px 0;
}
.callout.warn { border-left-color: var(--warn-line); background: var(--warn-bg); }
.callout strong { display: block; margin-bottom: 2px; }
.support { color: var(--muted); font-size: 14px; margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); }
.menu-btn { display: none; }
@media (max-width: 860px) {
  .layout { display: block; }
  .sidebar { width: auto; padding: 16px 16px 8px; }
  .nav { display: none; margin-top: 12px; }
  .sidebar.open .nav { display: block; }
  .menu-btn {
    display: inline-block;
    margin: 8px 10px 0;
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.35);
    border-radius: 6px;
    padding: 6px 10px;
    font: inherit;
  }
  .wrap { padding: 24px 16px 56px; }
  h1 { font-size: 28px; }
  table { display: block; overflow-x: auto; }
}