.calc-container{
  max-width:400px;
  padding:1rem;
  border:1px solid #ccc;
  border-radius:4px;
  font-family:inherit;
}

.calc-container label,
.calc-container fieldset{
  display:block;
  margin-bottom:0.75rem;
}

fieldset{
  border:1px solid #ccc;
  padding:0.5rem;
}

#total{
  font-weight:bold;
  font-size:1.2rem;
  margin-top:1rem;
}

button{
  padding:0.5rem 1rem;
  cursor:pointer;
  background:#008254;
  color:#fff;
  border:none;
  border-radius:4px;
}