.calculator {
  margin: 20px auto;
  max-width: 500px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 5px;
}


form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

label {
  margin-top: 10px;
}

input {
  padding: 10px;
  margin-top: 5px;
  margin-bottom: 10px;
  border-radius: 5px;
  border: 1px solid #ddd;
  width: 100%;
  box-sizing: border-box;
}
button[type="button"] {
	background-color: #4CAF50;
}

button[type="reset"] {
  background-color: #f44336;
}

button[type="button"]:hover, button[type="reset"]:hover {
  opacity: 0.8;
}

.button-group {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.button-group button {
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
    margin: 0 10px;
    font-weight: bold;
    color: #fff;
    cursor: pointer;
}

#result {
  margin-top: 20px;
  font-weight: bold;
  text-align: center;
}