body{
    margin:0;
    padding:0;
    height:100vh;
    overflow-y:scroll;
}
header{
    width:100%;
    height:auto;
    background-color:black;
}
header img{
    width:100%;
    height:auto;
}
main{
    margin-bottom:85px;
}
footer{
    height:75px;
    width:100%;
    background-color:black;
}