@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@100&display=swap');
.dow:link, .dow:visited {
    background-color: #f44336;
    color: white;
    padding: 15px 25px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
 }
  
  .dow:hover, .dow:active {
    background-color: red;
 }
  .container{
    background: url(images/back.gif);
    height: 100vh;
    background-size: 100% 100%;
}
.active{
    color: rgb(6, 117, 117);
    text-decoration: none;
    font-size: 20px;
    padding: 6px 13px;
    font-family: Roboto;
}