:root {
    --primary-color: #29CDB5;
}
.container {
    display: flex;
    flex-direction: column;
    margin: 10vh auto;
    width: 80vh;
    border: 3px solid;
    padding: 1rem;
    align-items: center;
    border-radius: 1rem;
    background-color: var(--primary-color);
    
}

#bill-amount,#cash-given {
    margin: 0 1rem 1rem 1rem;
}

#error-msg {
    color: red;
}
.change-table {
    display: table;
}

table, th, td {
    border: 0.1rem solid;
    border-collapse: collapse;
    text-align: center;
  }

  td{
    width: 2rem;
  }