:root {
  --bg: #07090f;
  --card: #111722;
  --text: #e8ecf4;
  --muted: #8b95a8;
  --accent: #3b9eff;
  --border: rgba(255,255,255,.08);
  --green: #34d399;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
.wrap, header.top, footer.foot { max-width: 920px; margin: 0 auto; padding: 24px 20px; }
header.top { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: .02em; }
nav { display: flex; gap: 14px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a.active { color: var(--text); }
h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.15; margin: 18px 0 12px; }
h2 { font-size: 1.2rem; margin: 28px 0 10px; }
h3 { font-size: 1rem; margin-bottom: 6px; }
p, li { color: var(--muted); }
.lede { font-size: 1.08rem; max-width: 680px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; margin: 20px 0 32px; }
.btn {
  background: linear-gradient(135deg, var(--accent), #2563eb);
  color: #fff; border: 0; padding: 11px 16px; border-radius: 8px;
  font-weight: 600; text-decoration: none; display: inline-block;
}
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.card p, .card li { font-size: .95rem; }
code, pre { font-family: ui-monospace, Menlo, monospace; }
code { font-size: .85rem; background: #0a0d14; padding: 2px 6px; border-radius: 6px; color: var(--text); }
pre { background: #0a0d14; padding: 14px; border-radius: 10px; overflow: auto; font-size: .8rem; margin: 10px 0 18px; color: var(--text); }
table { width: 100%; border-collapse: collapse; margin: 12px 0 24px; font-size: .92rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
.price { font-size: 1.4rem; color: var(--text); margin: 6px 0 8px; }
.ok { color: var(--green); }
.err { color: #f87171; }
input {
  background: #0a0d14; border: 1px solid var(--border); color: var(--text);
  padding: 8px 10px; border-radius: 8px; min-width: 200px;
}
button { cursor: pointer; }
footer.foot { color: var(--muted); font-size: .85rem; }
footer.foot a { color: var(--muted); }