:root {
  --blue: #006FEE;
  --blue-dark: #005bc4;
  --blue-soft: #e6f1fe;
  --ink: #18181b;
  --ink-2: #52525b;
  --ink-3: #a1a1aa;
  --bg: #ffffff;
  --bg-2: #f8f9fb;
  --line: #e8e8ec;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --blue-soft: #0c2340;
    --ink: #fafafa;
    --ink-2: #b6b6bf;
    --ink-3: #71717a;
    --bg: #101014;
    --bg-2: #17171c;
    --line: #26262c;
    --card: #1b1b21;
  }
}
:root[data-theme="dark"] {
  --blue-soft: #0c2340;
  --ink: #fafafa;
  --ink-2: #b6b6bf;
  --ink-3: #71717a;
  --bg: #101014;
  --bg-2: #17171c;
  --line: #26262c;
  --card: #1b1b21;
}
.theme-btn {
  background: none; border: 1px solid var(--line); border-radius: 999px;
  width: 34px; height: 34px; cursor: pointer; font-size: 15px; line-height: 1;
  display: grid; place-items: center; padding: 0;
}
.theme-btn:hover { background: var(--bg-2); }
* { box-sizing: border-box; margin: 0; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink); background: var(--bg);
  line-height: 1.65; -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }
nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 64px; max-width: 1060px; margin: 0 auto; padding: 0 24px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; letter-spacing: .04em; text-decoration: none; font-size: 17px; color: var(--ink); }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { text-decoration: none; color: var(--ink-2); font-size: 15px; }
.nav-links a:hover { color: var(--ink); }
main { padding: 56px 0 72px; }
h1 { font-size: clamp(28px, 4vw, 38px); letter-spacing: -.02em; font-weight: 800; margin-bottom: 6px; }
.updated { color: var(--ink-3); font-size: 14px; margin-bottom: 32px; }
h2 { font-size: 20px; margin: 32px 0 10px; }
h3 { font-size: 16px; margin: 22px 0 8px; }
p, li { color: var(--ink-2); font-size: 15.5px; }
ul { padding-left: 22px; margin: 10px 0; }
p { margin: 10px 0; }
strong { color: var(--ink); }
table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); color: var(--ink-2); vertical-align: top; }
th { color: var(--ink); }
.note { background: var(--blue-soft); border-radius: 14px; padding: 14px 18px; margin: 16px 0; }
footer { border-top: 1px solid var(--line); padding: 34px 0; }
.foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--ink-3); font-size: 14px; max-width: 1060px; margin: 0 auto; padding: 0 24px; }
.foot a { color: var(--ink-3); }