:root {
  --bg: #f7f7f5;
  --fg: #1c1c1a;
  --muted: #6b6b66;
  --accent: #0a7d4f;
}
[data-theme="dark"] {
  --bg: #141413;
  --fg: #ecece8;
  --muted: #9a9a93;
  --accent: #4cc38a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
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: 1.6;
  transition: background .2s, color .2s;
}
main { max-width: 36rem; width: 100%; }
.host {
  display: inline-block;
  margin-bottom: 1rem;
  padding-left: .75rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: .95rem;
}
h1 {
  font-size: clamp(2.2rem, 8vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 1rem;
}
.lead { color: var(--muted); font-size: 1.1rem; margin-bottom: 2rem; }
button {
  font: inherit;
  font-size: .9rem;
  padding: .55rem 1rem;
  border: 1px solid var(--muted);
  border-radius: 6px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
}
button:hover { border-color: var(--accent); color: var(--accent); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { body { transition: none; } }