body {
    margin: 0;
    font-family: Roboto;
}
.btn-outline-primary:not(:disabled):not(.disabled).active, .btn-outline-primary:not(:disabled):not(.disabled):active, .show > .btn-outline-primary.dropdown-toggle {
    color: #fff;
    background-color: #20b5a4;
    border-color: #20b5a4;
  }
  .h1, h1 {
    text-align: center;
    margin: 1rem;
    background: #20b5a4;
    color: white;
    }
    .table td, .table th {
        text-align: center;
        border: 1px solid lightgray;
        }
        th,td {
          border : 1px solid #ddd;
      
      }
  #old_price {
    color:red;
    text-decoration: line-through;
  }