body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  text-align: center;
  padding: 50px;
}

.container {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  display: inline-block;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input {
  padding: 10px;
  margin: 10px;
  width: 200px;
  font-size: 16px;
}

.buttons button {
  padding: 10px 20px;
  margin: 5px;
  font-size: 18px;
  cursor: pointer;
}

#result {
  margin-top: 20px;
  font-size: 20px;
  color: #333;
}