.header{
    height:60vh;
    background:
    linear-gradient(rgba(0,0,0,0.4),rgba(0,0,0,0.4)),
    url("image/header.JPG");
    background-size:cover;
    background-position:center;
}

.header h1{
    color:white;
    font-size:50px;
    text-shadow:2px 2px 10px rgba(0,0,0,0.8);
}