html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video 
{

	margin:0;
	padding:0;
	border:0;
	outline:0;
	font-size:100%;
	vertical-align:baseline;
	background:transparent;
}

body {
	background : lightgrey;
}

header {
    padding-top: 1em;
	background : white;
    text-align: center;
    line-height: 3em;
}

header h1 {
	font-size : 2em;
}

nav a{
	color : darkgray;
	font-style: normal;
    text-decoration : none;
	background : inherit;
}

nav a:hover{
    color : black;
	background: lightgrey;
    font-size:1.1em;
}

div.card{
	border:thick black;
    display:inline-block;
}