*{
    overflow: hidden;
    margin: 0;
}
body{
    background-color: #436EA6;
}
img{
    width: 100%;
}
.cohete{
    width: 20%;
    position: absolute;
    top: 200px;
    left: 450px;
}
.titulo{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    color: #436EA6;
    background-color: white;
    position: fixed;
    width: 100%;
    z-index: 100;
    padding: 10px;
}
.nube1{
    background-image: url('../img/nube.png');
    background-size: 100% 100%;
    width: 200px;
    height: 100px;
    position: absolute;
    left: 100px;
    animation-name: movimiento1;
    animation-duration: 10s;
    animation-iteration-count: infinite;
}

@keyframes movimiento1 {
   from{
    margin-top: -15%;
   }     
   to{
    margin-top: 50%;
   }
}
.nube2{
    background-image: url('../img/nube.png');
    background-size: 100% 100%;
    width: 300px;
    height: 150px;
    position: absolute;
    left: 450px;
    animation-name: movimiento2;
    animation-duration: 15s;
    animation-iteration-count: infinite;
}

@keyframes movimiento2 {
   from{
    margin-top: -16%;
   }     
   to{
    margin-top: 50%;
   }
}
.nube3{
    background-image: url('../img/nube.png');
    background-size: 100% 100%;
    width: 190px;
    height: 90px;
    position: absolute;
    right: 100px;
    animation-name: movimiento3;
    animation-duration: 16s;
    animation-iteration-count: infinite;
}

@keyframes movimiento3 {
   from{
    margin-top: -17%;
   }     
   to{
    margin-top: 50%;
   }
}