.txtInverted 
{
    filter:  progid:DXImageTransform.Microsoft.BasicImage(rotation=2);  /* IE6,IE7 */
    ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=2)"; /* IE8 */
    -moz-transform: rotate(-180deg);  /* FF3.5+ */
    -o-transform: rotate(-180deg);  /* Opera 10.5 */
    -webkit-transform: rotate(-180deg);  /* Safari 3.1+, Chrome */
    display: block;
    font-family: Verdana;
}

.txtNormal
{
    display: block;
    font-weight: bold;
    font-family: Verdana;
}

html, body
{
    height: 100%;
    width: 100%;
    padding: 0;
    margin: 0;
}

button
{
    margin: 5px;
}

#tableDiv
{
    margin: 0;
    top: 0;
    bottom: 0;
    margin-top: 95px;
    position: fixed;
}

table
{
    table-layout: fixed;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    border-spacing: 10px;
}

td
{
    border: 1px solid black;
    text-align: center;
    border-radius: 10px;
    border-width: 2px;
    font-size: 2vw;
}

.txtInverted 
{
    filter:  progid:DXImageTransform.Microsoft.BasicImage(rotation=2);  /* IE6,IE7 */
    ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=2)"; /* IE8 */
    -moz-transform: rotate(-180deg);  /* FF3.5+ */
    -o-transform: rotate(-180deg);  /* Opera 10.5 */
    -webkit-transform: rotate(-180deg);  /* Safari 3.1+, Chrome */
    display: block;
    font-family: Verdana;
}

.txtNormal
{
    display: block;
    font-weight: bold;
    font-family: Verdana;
}

html, body
{
    height: 100%;
    width: 100%;
    padding: 0;
    margin: 0;
}

button
{
    margin: 5px;
    height: 48px;
}

#tableDiv
{
    margin: 0;
    top: 0;
    bottom: 0;
    margin-top: 110px;
    position: fixed;
}

table
{
    table-layout: fixed;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    border-spacing: 10px;
}

td
{
    border: 1px solid black;
    text-align: center;
    border-radius: 10px;
    border-width: 2px;
    font-size: 2vw;
}

Update button size for mobile
Update button size for mobile