:root {
  --bg: #0f1424;
  --bg-soft: #161d33;
  --text: #eef1f8;
  --muted: #a7b0c6;
  --accent: #4f8cff;
  --line: #26304d;
  --max: 960px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.brand .mark { width: 30px; height: 30px; border-radius: 7px; background: var(--text); color: var(--bg); display: grid; place-items: center; font-weight: 800; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.btn.primary { background: var(--accent); color: #fff; }
.btn.ghost { border: 1px solid var(--line); color: var(--text); }
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.15; margin: 0 0 16px; }
.hero p { color: var(--muted); font-size: 19px; max-width: 640px; margin: 0 0 28px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
section { padding: 40px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 26px; margin: 0 0 20px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
ol.steps { padding-left: 22px; color: var(--muted); }
ol.steps li { margin-bottom: 10px; }
ol.steps strong { color: var(--text); }
.doc { padding: 48px 0; }
.doc h1 { font-size: 34px; margin: 0 0 6px; }
.doc .meta { color: var(--muted); margin: 0 0 28px; }
.doc h2 { font-size: 21px; margin: 32px 0 8px; }
.doc p, .doc li { color: #d6dbe7; }
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; }
footer nav { display: flex; gap: 18px; }