:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #172033;
  background: #f4f7fb;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
}

.container {
  width: min(90%, 600px);
  padding: 2.5rem;
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgb(0 0 0 / 8%);
  text-align: center;
}

h1 { margin-top: 0; }
p { line-height: 1.6; }

button {
  border: 0;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  background: #2563eb;
  color: white;
  font: inherit;
  cursor: pointer;
}

button:hover { background: #1d4ed8; }