html {
  background: linear-gradient(to top, #070707 15%, transparent 47%), url("../images/background_img.jpeg");
  background-size: 100% auto;
  background-repeat: no-repeat;
  background-position: 50% 50%;
  background-color: #070707;
  background-attachment: fixed;
}

footer {
  background: linear-gradient(to top, #6D6D6D 1%, #BDBDBD 90%, #070707 97%, #FF0000 0%);
  height: 100px;
  width: 100%;
  background-color: white;
  position: fixed;
  left: 0%;
  bottom: 0%;
  padding-bottom: 0%;
  padding-left: 4%;
}

a:link {
  color: rgb(53, 53, 53);
  text-decoration: none; 
}

a:visited {
  color: rgb(53, 53, 53);
  text-decoration: none;
}

a:hover {
  color: #af0000;
  text-decoration: none;
  text-shadow: 0px 3px 6px #e7e7e7; 
}

a:active {
  color: #777777;
  text-decoration: none;
  text-shadow: 0px 0px 0px transparent;
}

#references {
  font-family: arial;
  font-size: 70%;
  font-weight: bold;
  position: relative;
  left: -5%;
  top: -1%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#mp3_player {
  position: absolute;
  left: 25%;
  bottom: 120px;  
}

#copyright {
  font-family: arial;
  font-size: 50%;
  font-weight: bold;
  color: #af0000;  
  position: absolute;
  left: 5%;
  bottom: 120px;    
}