.container {
  max-width: 400px;
  margin: 0 auto;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  background-color: #fff;
  padding: 20px;
	margin-bottom: 20px;
}

.form-group {
  margin-bottom: 10px;
}

label {
  display: block;
  margin-bottom: 5px;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 10px;
  border-radius: 5px;
  border: none;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
  font-size: 16px;
  color: #555;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 10 5' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='%23333' d='M0 0l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 10px;
}

button[type="button"] {
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin-right: 10px;
    cursor: pointer;
    border-radius: 5px;
}

button[type="reset"] {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
opacity: 0.8;
}

#result {
font-size: 24px;
font-weight: bold;
text-align: center;
margin-bottom: 10px;
}