:root { color-scheme: dark; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #0b0b0d;
  color: #f2f2f4;
  font-family: system-ui, sans-serif;
}
main { max-width: 26rem; padding: 2rem; text-align: center; }
h1 { font-size: 1.25rem; letter-spacing: 0.08em; text-transform: uppercase; }
p { color: #a9a9b3; line-height: 1.6; }
button {
  margin: 0.75rem auto;
  padding: 0.7rem 1.1rem;
  border: 1px solid #3a3a44;
  border-radius: 0.6rem;
  background: #16161a;
  color: #f2f2f4;
  font: inherit;
  cursor: pointer;
}
button[disabled] { opacity: 0.5; cursor: not-allowed; }
#status { min-height: 2.5em; }