body{
  margin: 0;
  background-image: url(../images/fondolitchess.png);
  background-repeat: no-repeat;
  background-size: 100%;
  justify-content: center;
  display: flex;
  margin-top: 20%;
}

a {
  width: 8rem;
  border: 0.2rem solid black;
  display:flex;
  background-color: red;
  box-shadow: 0 5px 0 darkred;
  color: white;
  padding: 1em 1.5em;
  position: relative;
  text-decoration: none;
  text-transform: uppercase;
}

a:hover {
  background-color: #ce0606;
}

a:active {
  box-shadow: none;
  top: 5px;
}