.wrapper {
    min-height: 100%;
    display: grid;
    grid-template-rows: auto 1fr auto;
}

.page-footer {
    position: fixed;
    left: 0;
    bottom: 0px;
    width: 100%;
    background-color: black;
    color: white;
    text-align: center;
}

.container{
    vertical-align: middle;
    margin-top: 250px;
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

body {
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }

  a:link {
    color: white;
    background-color: transparent;
    text-decoration: none;
  }
  
  a:visited {
    color: cyan;
    background-color: transparent;
    text-decoration: none;
  }
  
  a:hover {
    color: red;
    background-color: transparent;
    text-decoration: underline;
  }
  
  a:active {
    color: yellow;
    background-color: transparent;
    text-decoration: underline;
  }