:root {
  --bg: #f7f5f0;
  --fg: #1d2a22;
  --muted: #5b6b60;
  --accent: #2f7d4f;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121814;
    --fg: #e8efe9;
    --muted: #9db0a2;
    --accent: #6cc68f;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  text-align: center;
}

.mark { font-size: 4rem; margin: 0; }

h1 {
  margin: 0.25rem 0 0.5rem;
  font-size: clamp(2rem, 6vw, 3.25rem);
  letter-spacing: -0.02em;
}

.tagline { margin: 0; color: var(--muted); font-size: 1.125rem; }

a { color: var(--accent); }

.actions { margin: 1.75rem 0 0; }

.button {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}