styles.css

/*
Taken from
https://www.w3schools.com/howto/howto_js_snackbar.asp
*/

/* The snackbar - position it at the bottom and in the middle of the screen */
#snackbar {
    visibility: hidden; /* Hidden by default. Visible on click */
    min-width: 230px; /* Set a default minimum width */
    margin-left: -100px; /* Divide value of min-width by 2 */
    background: #2e77d0; /* Black background color */
    color: #fff; /* White text color */
    text-align: center; /* Centered text */
    font-size: 16px;
    box-shadow: 0 4px 12px 4px rgba(0,0,0,.5);
    border-radius: 8px; /* Rounded borders */
    padding: 13px; /* Padding */
    position: fixed; /* Sit on top of the screen */
    z-index: 1; /* Add a z-index if needed */
    left: 50%; /* Center the snackbar */
    bottom: 120px; /* 120px from the bottom */
  }
  
  /* Show the snackbar when clicking on a button (class added with JavaScript) */
  #snackbar.show {
    visibility: visible; /* Show the snackbar */
    /* Add animation: Take 0.5 seconds to fade in and out the snackbar.
    However, delay the fade out process for 10.5 seconds */
    -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
  }
  
  /* Animations to fade the snackbar in and out */
  @-webkit-keyframes fadein {
    from {bottom: 0; opacity: 0;}
    to {bottom: 120px; opacity: 1;}
  }
  
  @keyframes fadein {
    from {bottom: 0; opacity: 0;}
    to {bottom: 120px; opacity: 1;}
  }
  
  @-webkit-keyframes fadeout {
    from {bottom: 30px; opacity: 1;}
    to {bottom: 0; opacity: 0;}
  }
  
  @keyframes fadeout {
    from {bottom: 120px; opacity: 1;}
    to {bottom: 0; opacity: 0;}
  }