*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body{
    background-color: #0162B7;
    overflow: hidden;
}
img{
    width: 100%;
}

.cohete{
    width: 50%;
    text-align: center;
    position: absolute;
    top: 200px;
}

#usuario{
    color: white;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

.nube1{
    background-image: url('../img/nube.png');
    background-size: 100% 100%;
    width: 250px;
    height: 80px;
    position: absolute;
    animation: movimiento1 20s infinite;
}

@keyframes movimiento1 {
    from{
        margin-left: 100%;
    }
    to{
        margin-left: -30%;
    }
}

.nube2{
    margin-top: 300px;
    background-image: url('../img/nube.png');
    background-size: 100% 100%;
    width: 300px;
    height: 100px;
    position: absolute;
    animation: movimiento2 25s infinite;
}

@keyframes movimiento2 {
    from{
        margin-left: 60%;
    }
    to{
        margin-left: -30%;
    }
}

.nube3{
    margin-top: 450px;
    background-image: url('../img/nube.png');
    background-size: 100% 100%;
    width: 400px;
    height: 100px;
    position: absolute;
    animation: movimiento3 30s infinite;
}

@keyframes movimiento3 {
    from{
        margin-left: 80%;
    }
    to{
        margin-left: -30%;
    }
}

@media (min-width: 768px){
    .cohete{
        width: 20%;
        left: 500px;
    }
    
}