/* for sticky footer
*/

body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
  }
  main {
    flex: 1 0 auto;
  }

  
.flex-container {
  display: flex;
  align-items: center;
}

.flex-container > div {
  margin: 4px;
}
  
.ok {
color: green;
}
.bad {
color: red;
}