#container{
    background-image: linear-gradient(red, blue);
}
#mytable{height: 100vh; margin: 0px;
margin: auto;
border: 6px solid black;
width: 80%;
border-collapse: collapse;
padding: 10px;
}
#mytable>thead>tr>td{
font-size: 30px;
padding: 10px;
margin: auto;
}
#mytable>tbody>tr>td{
    font-size: 24px;
    border: 2px solid black;
    padding: 10px;
}
#mytable>thead>tr{
    background-color: skyblue;
}
#mytable>caption{
    caption-side: bottom;
}
#mytable>colgroup>col:nth-child(1) {background-color: cadetblue;}
#mytable>colgroup>col:nth-child(2) {background-color: rgb(92, 144, 184);}
#mytable>colgroup>col:nth-child(3) {background-color: rgb(98, 163, 229);}
#mytable>colgroup>col:nth-child(4) {background-color: rgb(67, 157, 225);}
#mytable>colgroup>col:nth-child(5) {background-color: rgb(67, 83, 225);}