body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #11998e, #38ef7d);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  width: 400px;
  box-shadow: 0px 5px 15px rgba(0,0,0,0.2);
}

h1 {
  margin-bottom: 15px;
}

input {
  padding: 10px;
  width: 150px;
  font-size: 16px;
}

button {
  padding: 10px 15px;
  margin: 5px;
  border: none;
  border-radius: 6px;
  background: #11998e;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #0e7c73;
}

#message {
  font-weight: bold;
  margin-top: 15px;
}