body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.card {
  background: white;
  padding: 25px;
  border-radius: 12px;
  width: 90%;
  max-width: 520px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0,0,0,0.25);
}

textarea {
  width: 100%;
  height: 100px;
  margin: 15px 0;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 15px;
}

button {
  background: #1e3c72;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
}

#result {
  margin-top: 15px;
  font-weight: bold;
  color: green;
}