:root{
    --primary-color : #f3f4f6;
    --secondary-color : #009999;
}

body {
    margin: auto;
    background-color: var(--primary-color);
    font-weight: bold;
}

main {
    max-width: 80%;
    width: 600px;
    margin: auto;
    text-align: center;
}

#bill,
#next {
  display: block;
}

#cash,
#check,
#label-cash {
  display: none;
}

h1 {
    font-size: 2.3rem;
    color: var(--secondary-color);
    margin-block-end: 0;
    margin-block-start: 1rem;
  }
  
  h4 {
    font-size: 1.1rem;
    margin-block-end: 0;
    margin-block-start: 1rem;
    line-height: 1.5rem;
  }
  
  hr {
    margin: 1rem 0;
  }
  
  label {
    font-size: 1.1rem;
  }

  input {
    font-family: Lato;
    font-size: large;
    font-weight: bold;
    border: 2px solid var(--secondary-color);
    border-radius: 0.5rem;
    padding: 0.75rem;
    margin: 0.75rem auto;
    max-width: 30%;
    width: 200px;
  }
  
  button {
    font-family: Lato;
    padding: 0.5rem 1.5rem;
    margin: 0.75rem auto;
    border: 2px solid var(--secondary-color);
    border-radius: 0.5rem;
    text-align: center;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    color: #fff;
    background-color: var(--secondary-color);
  }
  
  #message-text {
    display: none;
    font-size: 1.4rem;
  }

  #change-table {
    display: none;
    margin: 1rem auto 0;
    border-collapse: collapse;
  }
  
  table#change-table th {
    font-weight: bolder;
    font-size: 1.1rem;
  }
  
  table#change-table th,
  td {
    border: 2px solid var(--secondary-color);
    padding: 1rem 1.3rem;
  }

  .footer{
    position:absolute;
   bottom:0;
   width:100%;
   text-align: center;
}

.footer a {
    padding-inline: 1rem;
    font-size: 50px;
    color: rgb(24, 4, 4);
    text-decoration: none;
}

.footer a:hover {
  color: rgb(71, 135, 187);
  font-size: 70px;
}