:root {
  --bg: #f4f6f2;
  --panel: #fffffc;
  --ink: #1b221f;
  --muted: #56625d;
  --accent: #0f6b5c;
  --accent-soft: #dcefe9;
  --rule: #d6ddd8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121715;
    --panel: #1a211e;
    --ink: #e8eeea;
    --muted: #a3b0aa;
    --accent: #4fb39f;
    --accent-soft: #1d3530;
    --rule: #2c3632;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
header.top { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 20px; }
.brand img { width: 36px; height: 36px; }
nav a { margin-left: 18px; color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--ink); }
.hero { padding: 48px 0 32px; }
.hero h1 { font-size: clamp(32px, 6vw, 52px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.button { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 12px 22px; border-radius: 10px; font-weight: 600; }
.button.secondary { background: var(--panel); color: var(--ink); border: 1px solid var(--rule); margin-left: 8px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 32px 0; }
.card { background: var(--panel); border: 1px solid var(--rule); border-radius: 14px; padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
.promise { background: var(--accent-soft); border-radius: 14px; padding: 22px 24px; margin: 32px 0; }
.promise h2 { margin: 0 0 8px; font-size: 22px; }
section h2 { font-size: 26px; margin: 40px 0 12px; }
pre { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: 14px; }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.muted { color: var(--muted); }
table { border-collapse: collapse; width: 100%; margin: 12px 0 24px; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--rule); }
th { color: var(--muted); font-weight: 600; }
.doc { max-width: 760px; padding: 24px 0 64px; }
.doc h1 { font-size: 36px; margin: 8px 0 4px; }
.doc h2 { font-size: 22px; margin: 32px 0 8px; }
footer { border-top: 1px solid var(--rule); margin-top: 48px; padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 16px; }
@media (max-width: 560px) {
  nav a { margin-left: 12px; }
  .button.secondary { margin: 10px 0 0; }
  table { font-size: 14px; }
  th, td { padding: 8px 6px; }
}