style.css

body{
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}
header{
    position: absolute;
    top: 15px;
    text-align: right;
    width: 100%;
}
header a{
    color: rgba(255, 255, 255,0.5);
    text-decoration:none;
    margin-right: 100px;
    font-family: Tahoma;
    font-size: 16px;
    transition: 0.5s ease-in-out;
}
header a:hover{
    color: white;
}

main{
    height: 100vh;
    width: 100%;
    background-image: url(images/big.png.jpg);
  background-size:cover ;
  background-repeat: no-repeat;
  background-position: center;
  background-position: center;
background-attachment: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
}
main h1{
    margin: 0;
    font-size: 50px;
    color: black;
    mix-blend-mode: overlay;
    padding-bottom: 120px;

}