*{
  margin: 0;
  padding: 0;
}
h1{
  text-align: center;
  color: #fff;
  background-color: #000;
  padding: 10px;
}
#indice{
  width: 100%;
  height: 50px;
  background-color: #333;
  color: white;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  position: sticky;
  top: 0;
}
#indice li{
  list-style: none;
  margin-top: 10px;
  margin-bottom: 10px;
  background-color: #3498db;
  color: black;
  border-radius: 5px;
}
#indice li a{
  color: white;
  text-decoration: none;
  padding: 5px 30px;
  display: block;
}
#contenido{
  margin-bottom: 80px;
}
#contenido img {
  width: 86%;
  height: auto;
  margin-left: 10px;
}
li>div{
  width: 14%;
  display: flex;
  flex-direction: column;
  align-items: center;
}
li>div>a{
    margin: 2px;
}
#contenido li{
    list-style: none;
    display: flex;
    border: 1px solid #c7c7c7;
    margin: 5px;
    padding: 5px;
    border-radius: 8px;
}
footer{
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50px;
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
}
footer a{
    color: #3498db;
    text-decoration: none;
}
footer a:visited{
    color: #657043;
}