body {
  font-family: Arial, sans-serif;
  background-color: #f4f7fa;
  padding: 40px;
  text-align: center;
}

.container {
  max-width: 600px;
  margin: auto;
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

input {
  width: 80%;
  padding: 10px;
  font-size: 16px;
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin: 5px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button i {
  margin-right: 5px;
}

#output {
  margin-top: 20px;
  text-align: left;
  font-size: 16px;
}