:root {
  --bg: #f7f8f7;
  --text: #1c2421;
  --muted: #5e6a66;
  --accent: #14866a;
  --line: #dfe5e2;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111614;
    --text: #e8eeeb;
    --muted: #9aa8a3;
    --accent: #4fd1a8;
    --line: #26302c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

.brand {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--accent);
  font-weight: 700;
  font-size: 19px;
  text-decoration: none;
}

h1 { font-size: 34px; line-height: 1.2; margin: 0 0 4px; letter-spacing: -0.02em; }
h2 { font-size: 21px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--accent); }

.meta, .lead { color: var(--muted); }
.lead { font-size: 19px; margin-bottom: 8px; }

.button {
  display: inline-block;
  margin: 8px 0 4px;
  padding: 12px 20px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 15px;
}