ex.css

*
{
    padding: 0%;
    margin: 0%;
}
section img{
    
    
}
section {
    position: absolute;
    
    

}

header
{
     background-color: rgba(0, 0, 0, 0.911);
     display: flex;
    justify-content: center;
     color: white;
     width: 1900px
      
}
header a{
    color: yellow;
    text-decoration: none;
}
herder a:hover{
    color: rgb(61, 100, 3);
    background-color: white;
}
header div{
    width: 160;
    display:flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;

    
}
.header-main{
        width: 90%;
}