* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

main {
  background: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  max-width: 400px;
  width: 100%;
  text-align: center;
}

h1 { margin-bottom: 24px; font-size: 28px; }

button {
  background: #0071e3;
  color: white;
  border: none;
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.15s;
}

button:hover:not(:disabled) { background: #0056b3; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

#greeting { margin-top: 24px; font-size: 24px; }
#status { margin-top: 12px; font-size: 13px; color: #86868b; }