* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  text-align: center;
}

.card {
  background: white;
  padding: 40px;
  border-radius: 20px;
  width: 350px;
  box-shadow: 0px 8px 25px rgba(0, 0, 0, 0.3);
}

h1 {
  color: #0f172a;
  margin-bottom: 10px;
}

p {
  color: #64748b;
  font-size: 18px;
}

button {
  margin-top: 20px;
  padding: 12px 20px;
  border: none;
  border-radius: 8px;
  background: #2563eb;
  color: white;
  cursor: pointer;
  font-size: 16px;
}

button:hover {
  transform: scale(1.05);
  transition: 0.3s;
}

#message {
  margin-top: 20px;
  color: #16a34a;
  font-weight: bold;
}