body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #0f172a;
  color: white;
}

#app {
  background: #1e293b;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
  max-width: 400px;
  width: 100%;
}

input, button {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  border-radius: 8px;
  border: none;
}

button {
  background: #3b82f6;
  color: white;
  font-weight: bold;
  cursor: pointer;
}