:root { --primary: #148f77; --bg: #061914; --text: #effffa; --muted: #b7d3c9; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
main { max-width: 720px; margin: 0 auto; padding: 2rem 16px 4rem; }
h1 { font-size: 2rem; margin: 1rem 0 0.25rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.5rem; color: var(--primary); }
h3 { font-size: 1.05rem; margin: 1.25rem 0 0.25rem; }
p, li { color: var(--muted); }
ul { padding-left: 1.25rem; }
a { color: var(--primary); }
.muted { font-size: 0.9rem; }