:root { color-scheme: light; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f6f4ef;
  color: #23302a;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}
main { max-width: 26rem; padding: 2rem 1.5rem; text-align: center; }
h1 { color: #43bf83; font-size: 2rem; margin: 0 0 1rem; }
a { color: #2e8a5d; }
.button {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  background: #43bf83;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
[hidden] { display: none; }