form {
  width: 95%;
  max-width: 400px;
  text-align: center;
  
  padding-bottom: 10px;
  margin: auto;
  border-radius: 15px;
  background-color: #2D2463;
}
input[type=textfield] {
    width: 75%;
    padding: 16px 32px;
    font-size: 16px;
    margin: 8px 0;
    border: 1px solid silver;
    border-radius: 1px;
    text-align: left;
    color: #333;
    
}
input[type=button], input[type=submit], input[type=reset] {
    background-color: #F39200;
    border: none;
    color: white;
    padding: 5px 5px;
    font-size: 18px;
    min-width: 21%;
    text-decoration: none;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 20px;
}
input[type=button]:hover, input[type=submit]:hover, input[type=reset]:hover {
  background-color: #FDC800;
}

.calculadoda{
  margin-top: 8px;
}