form#calc{
    /*font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;*/
    line-height: 1.42857143;
    color: #666666;
    margin: 0 auto;
}
form#calc .form-group{
    max-width: 500px;
}
#calc-header H3 {
    font-size: 22px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0px 0px 0.7143em 0px;
    padding: 0.3571em;
    background-color: #ddd!important;
    color: #666666 !important;
}
span.submitButton{
  display: inline-block;
  padding: 0px 20px;
  font-size: 18px;
  cursor: pointer;
  text-align: center;
  vertical-align: middle;
  text-decoration: none;
  outline: none;
  color: #fff;
  background-color: #4CAF50;
  border: none;
  border-radius: 15px;
  box-shadow: 0 5px #999;
}
.submitButton:hover {background-color: #3e8e41}
.submitButton:active {
  background-color: #3e8e41;
  box-shadow: 0 5px #229134;
  transform: translateY(4px);
}
#calc select{
    height:40px;
    border-radius: 5px;
    width:100%;
    border-color: #ddd;
}
#calc select.half{width:50%;}