:root {
  --bg: #fbfbfa; --panel: #ffffff; --ink: #15171a; --quiet: #5d6470; --line: #e4e6ea; --soft: #f2f3f5;
  --accent: #2a62d6; --accent-ink: #ffffff; --good: #18804a; --good-bg: #e5f4ec; --bad: #c0362c; --bad-bg: #fbe8e6;
  --relay: #6247cc; --relay-bg: #eeeafb; --code: #f3f4f6;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1013; --panel: #15181d; --ink: #e9ecf1; --quiet: #9aa3b0; --line: #262b33; --soft: #1a1e24;
    --accent: #6d9cf5; --accent-ink: #0e1013; --good: #4cc282; --good-bg: #13291c; --bad: #f2786e; --bad-bg: #351a18;
    --relay: #a593f3; --relay-bg: #221d38; --code: #1a1e24;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--mono); font-size: 0.88em; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
nav { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 2; }
nav .wrap { display: flex; align-items: center; gap: 24px; height: 56px; }
nav .brand { font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
nav .brand span { color: var(--quiet); font-weight: 500; }
nav .links { display: flex; gap: 20px; margin-left: auto; font-size: 15px; }
nav .links a { color: var(--quiet); }
nav .links a:hover, nav .links a.on { color: var(--ink); text-decoration: none; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; font-weight: 600; font-size: 15px; border: 1px solid var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.ghost { color: var(--accent); }
.btn:hover { text-decoration: none; filter: brightness(1.05); }
footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 28px 0 40px; color: var(--quiet); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; }

/* docs pages */
.doc { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; padding-top: 32px; }
.doc aside { position: sticky; top: 80px; align-self: start; font-size: 14px; }
.doc aside a { display: block; padding: 3px 0; color: var(--quiet); }
.doc aside a.on { color: var(--ink); font-weight: 600; }
.doc article { min-width: 0; }
.doc article h1 { font-size: 34px; letter-spacing: -0.02em; margin: 0 0 16px; }
.doc article h2 { font-size: 24px; margin: 40px 0 12px; padding-top: 8px; border-top: 1px solid var(--line); }
.doc article h3 { font-size: 18px; margin: 28px 0 8px; }
.doc article pre { background: var(--code); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow-x: auto; line-height: 1.5; }
.doc article :not(pre) > code { background: var(--code); padding: 1px 5px; border-radius: 4px; }
.doc article table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 12px 0; display: block; overflow-x: auto; }
.doc article th, .doc article td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
.doc article th { background: var(--soft); }
.doc article blockquote { margin: 16px 0; padding: 8px 16px; border-left: 3px solid var(--accent); background: var(--soft); border-radius: 0 6px 6px 0; }
@media (max-width: 860px) {
  .doc { grid-template-columns: 1fr; gap: 16px; }
  .doc aside { position: static; display: none; }
  nav .links { gap: 14px; font-size: 14px; }
}