:root {
  --bg: #f4f6f8;
  --paper: #ffffff;
  --ink: #17202a;
  --muted: #5c6b7a;
  --line: #e3e8ee;
  --accent: #0f7a4a;
  --accent-soft: #e7f6ee;
  --warn: #9a5b12;
  --warn-soft: #fff4e6;
  --bad: #9b2c2c;
  --bad-soft: #fdecec;
  --side: 280px;
  --top: 64px;
  --max: 820px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", Manrope, system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}
a { color: var(--accent); }
img { max-width: 100%; }
code, .path {
  font-family: Consolas, ui-monospace, monospace;
  font-size: 0.92em;
  background: #eef2f6;
  padding: 0.05em 0.35em;
  border-radius: 4px;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--top);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 18px;
  background: #10161c;
  color: #f4f7f8;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.brand span { color: #3ddc97; font-weight: 700; }
.top-search { position: relative; flex: 1; max-width: 460px; }
.top-search input {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  background: #1c2630;
  color: #fff;
}
.top-search input::placeholder { color: #8ea0b0; }
.search-hit {
  position: absolute;
  left: 0; right: 0; top: calc(100% + 6px);
  background: #fff;
  color: var(--ink);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(0,0,0,.18);
  overflow: hidden;
  display: none;
}
.search-hit a {
  display: block;
  padding: 10px 12px;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--line);
}
.search-hit a:hover { background: var(--accent-soft); }
.search-hit small { display: block; color: var(--muted); }
.top-links { margin-left: auto; display: flex; gap: 14px; align-items: center; }
.top-links a { color: #d5dee6; text-decoration: none; font-weight: 650; font-size: 14px; }
.top-links a:hover { color: #fff; }
.menu-btn {
  display: none;
  border: 1px solid #31404d;
  background: transparent;
  color: #fff;
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
  font-weight: 700;
}

.layout { display: grid; grid-template-columns: var(--side) 1fr; min-height: calc(100vh - var(--top)); }
.side {
  position: sticky;
  top: var(--top);
  align-self: start;
  height: calc(100vh - var(--top));
  overflow: auto;
  padding: 18px 14px 32px;
  background: #fff;
  border-right: 1px solid var(--line);
}
.side h2 {
  margin: 16px 8px 6px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.side a {
  display: block;
  text-decoration: none;
  color: var(--ink);
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 14px;
}
.side a:hover { background: var(--bg); }
.side a.is-on { background: var(--accent-soft); color: var(--accent); font-weight: 700; }

.doc { padding: 36px 28px 80px; }
.doc-inner { max-width: var(--max); }
.doc h1 { font-size: clamp(32px, 4vw, 44px); line-height: 1.1; margin: 0 0 12px; letter-spacing: -0.02em; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 22px; }
h2 { margin: 32px 0 10px; font-size: 24px; line-height: 1.2; }
h3 { margin: 22px 0 8px; font-size: 18px; }
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 14px; padding-left: 1.2em; }
li { margin: 4px 0; }
table { width: 100%; border-collapse: collapse; margin: 8px 0 18px; background: var(--paper); }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 14px; }
th { background: #f8fafb; font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }

.callout, .warn, .bad {
  border-radius: 14px;
  padding: 14px 16px;
  margin: 14px 0 18px;
}
.callout { background: var(--accent-soft); }
.warn { background: var(--warn-soft); }
.bad { background: var(--bad-soft); }
.callout strong, .warn strong, .bad strong { display: block; margin-bottom: 4px; }

.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 12px 0 18px; }
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
}
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  counter-increment: step;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px 12px 54px;
  margin: 8px 0;
  position: relative;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 12px; top: 12px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  display: grid; place-items: center;
  font-size: 13px;
}
.next { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.next a {
  text-decoration: none;
  background: #10161c;
  color: #fff;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 700;
}

@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }
  .top-links a:not(.keep) { display: none; }
  .layout { grid-template-columns: 1fr; }
  .side {
    display: none;
    position: fixed;
    z-index: 30;
    inset: var(--top) 0 0 0;
    height: auto;
    width: min(360px, 100%);
  }
  body.nav-open .side { display: block; }
  .cards { grid-template-columns: 1fr; }
  .doc { padding: 24px 16px 64px; }
}