body {
        width: 900px;
        position: relative;
        display: block;
        margin-left:auto;
        margin-right:auto;
        background-color: black;
        }

tbody {
    display: table-row-group;
    vertical-align: middle;
    border-color: inherit;
}


.navigationbar {
  padding: 0;
    border-spacing: 0;
    border-collapse: collapse;
    position: absolute;
    top: 0;
    left: 0;
    margin-left: 10px;
    margin-top: 10px;
}


table {
    display: table;
    box-sizing: border-box;
    border-spacing: 0;
    border-collapse: collapse;
    margin:0;
    padding:0;

}

.nav {
    width: 73px;
    height: 73px;
    padding: 0;
    margin: 0;
}

tr {
    display: table-row;
    vertical-align: inherit;
    border-color: inherit;
}

td {
    vertical-align: top;
    margin: 0;
    padding: 0;
}
   
td {
    display: table-cell;
    vertical-align: inherit;
    
}