:root {
  --bg: #f7f8ff;
  --ink: #121529;
  --muted: #68708a;
  --line: rgba(31, 38, 74, .10);
  --purple: #6e5cff;
  --green: #19b783;
  --red: #f04f7a;
  --shadow: 0 12px 38px rgba(72, 73, 142, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 80% 0, rgba(116,102,255,.14), transparent 26rem),
    radial-gradient(circle at 8% 16%, rgba(81,214,244,.12), transparent 22rem),
    linear-gradient(180deg, #fbfcff 0%, #f7f8ff 100%);
}
a { color: inherit; }
::selection { background: rgba(110,92,255,.18); }
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  width: min(1180px, calc(100% - 28px)); margin: 14px auto 0;
  background: rgba(255,255,255,.86); backdrop-filter: blur(16px);
  border: 1px solid var(--line); border-radius: 22px; padding: 8px 8px 8px 16px;
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; letter-spacing: -.04em; font-size: 20px; text-decoration: none; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 11px;
  background: linear-gradient(145deg, #4b80ff, #755bff);
  box-shadow: 0 8px 18px rgba(91,79,255,.28);
}
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  min-height: 42px; border: 0; border-radius: 14px; padding: 0 16px;
  display: inline-flex; align-items: center; font-weight: 800; text-decoration: none;
  color: #fff; background: linear-gradient(135deg, #496dff, #6f5bff 50%, #9a54f8);
}
.btn.ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.shell { width: min(1180px, calc(100% - 28px)); margin: 16px auto 48px; display: grid; grid-template-columns: 240px 1fr; gap: 16px; }
.nav {
  background: #fff; border: 1px solid var(--line); border-radius: 24px;
  padding: 14px 10px; box-shadow: var(--shadow); height: fit-content; position: sticky; top: 16px;
}
.nav-group { margin: 14px 8px 6px; font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: #9aa1b5; }
.nav a {
  display: block; padding: 9px 10px; border-radius: 12px; text-decoration: none;
  color: #4b5268; font-weight: 650; font-size: 14px;
}
.nav a.active, .nav a:hover { background: rgba(109,93,252,.10); color: #3d2fd4; }
.main { min-width: 0; display: grid; gap: 14px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 22px 24px; box-shadow: var(--shadow); }
h1 { margin: 0 0 8px; font-size: clamp(32px, 5vw, 48px); letter-spacing: -.055em; line-height: 1; }
.lead { margin: 0 0 8px; color: var(--muted); font-size: 17px; line-height: 1.5; }
h2 { margin: 28px 0 10px; font-size: 22px; letter-spacing: -.03em; }
h3 { margin: 20px 0 8px; font-size: 17px; }
p, li { line-height: 1.6; }
ol, ul { padding-left: 20px; }
.muted { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.tile { background: #f6f7fc; border-radius: 16px; padding: 14px 16px; text-decoration: none; display: block; }
.tile b { display: block; margin-bottom: 4px; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: #f4f5fb; padding: 2px 6px; border-radius: 6px; font-size: 13px; }
pre {
  background: #121529; color: #eef1ff; padding: 14px 16px; border-radius: 16px;
  overflow: auto; font-size: 13px; line-height: 1.5;
}
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); font-size: 14px; vertical-align: top; }
th { color: var(--muted); font-size: 12px; }
.callout { border-left: 4px solid var(--purple); background: #f7f5ff; padding: 12px 14px; border-radius: 12px; }
.callout.warn { border-left-color: var(--red); background: #fff1f4; }
.callout.ok { border-left-color: var(--green); background: #edfbf5; }
footer { width: min(1180px, calc(100% - 28px)); margin: 0 auto 32px; color: var(--muted); font-size: 13px; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .nav { position: static; display: flex; flex-wrap: wrap; gap: 4px; }
  .nav-group { width: 100%; }
  .nav a { width: auto; }
}