:root {
  --bg: #fbfbf9; --panel: #ffffff; --text: #1d1d1b; --muted: #5f5f5a; --line: #e4e4de; --accent: #2d6a4f;
  --accent-soft: #e8f3ec;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161615; --panel: #1f1f1e; --text: #ecece8; --muted: #a3a39d; --line: #33332f; --accent: #74c69d;
          --accent-soft: #1d3326; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); background: var(--panel); }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
               padding-top: 14px; padding-bottom: 14px; }
.brand { font-weight: 700; text-decoration: none; color: var(--text); letter-spacing: -.01em; }
nav a { margin-left: 18px; text-decoration: none; color: var(--muted); font-size: 15px; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current] { color: var(--text); }
main { padding: 40px 0 64px; }
h1 { font-size: clamp(28px, 5vw, 38px); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 36px 0 8px; letter-spacing: -.01em; }
.lede { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin: 28px 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.note { background: var(--accent-soft); border-radius: 10px; padding: 14px 18px; margin: 24px 0; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { padding-top: 20px; padding-bottom: 28px; }