body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
  }

  main {
    flex: 1 0 auto;
  }

.footer-copyright{
    background-color: #4d90fe;
    position:bottom;
}

.nav-extended{
    background-color: #4d90fe;
}

body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}
footer {
    bottom: 0px;
    position: absolute;
    width: 100%;
    }