body {
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  text-align: center;
  margin: 0;
}

.box {
  margin: 80px auto;
  width: 90%;
  max-width: 420px;
  padding: 25px;
  background: white;
  border-radius: 15px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

h2 {
  margin-bottom: 10px;
}

input {
  width: 90%;
  padding: 12px;
  margin: 10px 0;
  border-radius: 8px;
  border: 1px solid #ccc;
}

button {
  width: 95%;
  padding: 12px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
}

button:hover {
  background: #0056b3;
}

.success {
  color: green;
  font-weight: bold;
  font-size: 18px;
}

.fail {
  color: red;
  font-weight: bold;
  font-size: 16px;
}

.note {
  font-size: 13px;
  margin-top: 10px;
  color: #555;
}