/* Center everything */
body {
  height: 100vh;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f5f6fa;
  font-family: "Inter", sans-serif;
}

/* Stylish card */
.card {
  background: white;
  padding: 2.5rem 3rem;
  border-radius: 18px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  text-align: center;
  max-width: 450px;
}

/* Button styling */
.btn {
  margin-top: 1.5rem;
  padding: 0.8rem 1.6rem;
  background: #4a6cf7;
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn:hover {
  background: #3a56c9;
  transform: translateY(-2px);
}