* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Inter, system-ui, sans-serif;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #e2e8f0;
}

.card {
  width: min(90vw, 480px);
  padding: 2rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  text-align: center;
}

h1 {
  margin-top: 0;
  font-size: 2.5rem;
}

p {
  line-height: 1.5;
}

button {
  margin-top: 1rem;
  border: 0;
  border-radius: 999px;
  padding: 0.8rem 1.2rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: #38bdf8;
  color: #082f49;
}

button:hover {
  background: #7dd3fc;
}

.message {
  min-height: 1.5rem;
  margin-top: 1rem;
  color: #bae6fd;
}