:root {
  --fg: #1a1a1a;
  --muted: #666;
  --link: #2563eb;
  --border: #e5e7eb;
  --bg: #ffffff;
  --accent: #2e7d52;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--fg);
  margin: 0;
  background: var(--bg);
}
.wrap { max-width: 820px; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
.nav { font-size: .9rem; margin-bottom: 1.5rem; }
.nav a { margin-right: .4rem; color: var(--link); text-decoration: none; }
.nav a:hover { text-decoration: underline; }
h1 { font-size: 2rem; margin: .2rem 0 1rem; line-height: 1.2; }
h2 { font-size: 1.3rem; margin: 2rem 0 .5rem; }
h3 { font-size: 1.05rem; margin: 0 0 .35rem; }
a { color: var(--link); }
p { margin: .6rem 0; }
.lede { font-size: 1.15rem; color: var(--muted); }
.btns { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.5rem 0; }
.btn {
  display: inline-block; padding: .7rem 1.2rem; border-radius: 10px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600;
}
.btn.secondary { background: #374151; }
.btn:hover { opacity: .92; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.card { border: 1px solid var(--border); border-radius: 12px; padding: 1.1rem; }
.card h3 { margin-top: 0; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
th, td { border: 1px solid var(--border); padding: .5rem .6rem; text-align: left; vertical-align: top; }
ul, ol { padding-left: 1.25rem; }
code { background: #f3f4f6; padding: .1rem .3rem; border-radius: 4px; }
footer { margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--border); font-size: .85rem; color: var(--muted); }
footer a { color: var(--muted); }