*{
    margin:0;
    padding:0;
}
header{
    background-image:linear-gradient(rgba(238, 4, 255, 0.4),rgb(0, 162, 255, 0.4)), url("https://avatars.mds.yandex.net/get-vthumb/3430042/c63732a7add660dfa0056efa8b7fe274/800x450");
height:100vh;background-repeat:no-repeat;
background-size:cover;
background-attachment: fixed;
color: rgb(255, 255, 255);
display: flex;
justify-content : center;
align-items: center;
flex-direction: column;
}