* {padding: 0; margin: 0;}
html {font-size: 60%; overflow: hidden;}
.container {
height: 100vh;
display: flex;
align-items: center;
justify-content: center;
}
.rocket {
height: 50em;
transform: translatey(100vh);
}
.sky {
position: absolute;
top: 0; left: 0; right: 0; bottom: 0;
display: flex;
flex-direction: column;
width: 100%;
min-height: 100vh;
background-color: #000;
height: 200vh;
z-index: -1;
}
.sky-bg {
height: 100vh;
background-size: 30rem;
background-image: url('data:image/svg+xml;utf8,');
}