*,
*::before,
*::after {
    box-sizing: border-box;
}

body{
  font-family: Verdana, "Open Sans", Arial, sans-serif;
    background-color: #f8f8f8;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  text-align: center;
  margin-bottom: 100px;
  z-index: 1;
}

footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  z-index: 2;
  background-color: #f8f8f8;
  color: #adb5bd;
}

@media (max-width: 600px) {
  footer {
    font-size: smaller;
  }
}