:root { --bg: #fbfaf6; --ink: #1f2a24; --accent: #2f6b4f; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #131a16; --ink: #eef2ee; --accent: #7fc8a0; }
}
* { box-sizing: border-box; }
html { background: var(--bg); color: var(--ink); }
body { margin: 0; font: 18px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 36rem; margin: 0 auto; padding: 4rem 16px; }
.brand { margin: 0 0 2rem; font-weight: 700; color: var(--accent); }
h1 { margin: 0 0 1rem; font-size: 1.75rem; line-height: 1.25; }
a { color: var(--accent); }