body,div {margin: 0;padding: 0;text-align: centre}
#nav {float:left; width: 200px}
#nav {background: yellow}

d1#menu {position: absolute
top: 20px; left: 20px;  width: 130px}

dt.btn {margin-bottom: 22px;text-align: center; width 120px}

dt.btn a {display: block; text-decoration: none;
color: black; font-weight: bold;min-height 10px}

dt.btn a {background : lightblue;
border: 10px outset lightblue}

dt.btn a:hover {background: white;
border: 10px outset white }

dt.btn a:active {background: lightgreen;
border: 10px insert lightgreen}