#titulo{
display: block;
background-color: #A982C4;
}
body{
  color:black;
  background-image: url("universe.png"); 
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
.voltar {
transition: all .5s linear 0;
 border: solid 3px #184A4D;
 display:block;
background: url(voltarazul.png) top center no-repeat;
background-size: 100px;
 width: 160px;
 height:160px;
position: absolute;
top: 500px;
left:0;
}
.voltar:hover{

background-image: url(voltarrosa.png);
top: 490px;
}
#intro{
  color: #9DC4C9;
  display: block;
  text-align: center;
  margin: 150px 400px 600px 400px;
  border: solid 3px #184A4D;
  background-color: #04304A;
  border-radius:3px;
  box-shadow: 3px 3px 3px 1px #455A5C;
  padding-bottom: 300px;
  padding-left: 50px;
  padding-right: 50px;
}
#intro p{
font-size: 20px;
}
.lista {
display: inline-block;
text-align: center;
font-size: 20px;
}