:root { color-scheme: dark; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: #05080d; color: #d7e3f0; font: 15px/1.5 Inter, system-ui, sans-serif;
}
main { text-align: center; padding: 16px; max-width: 360px; }
h1 { font-size: 20px; margin: 12px 0 4px; letter-spacing: 0.04em; }
button {
  margin-top: 12px; padding: 10px 18px; border: 1px solid #3a6ea5; border-radius: 6px;
  background: #0f2a45; color: inherit; font: inherit; cursor: pointer;
}
button:hover { background: #163a5e; }
#status { min-height: 1.5em; color: #9fb3c8; font-size: 13px; }