*{
    margin:0; 
    padding:0;
    box-sizing: border-box;
    font-family: sans-serif;
}

body{
    background: white;
    min-height:100vh;
    background-image: linear-gradient(white, #ccc);
}

header img{
    width:100%;
    box-shadow:0px 0px 3px #2d2d2d;
}

main{
    margin-top:3%;
    text-align:center;
}