.rainbow {
    background-image: linear-gradient(to left, violet, indigo, blue, green, yellow, orange, red);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
text-align:center;
    font-size: 100;
}

a {color:deeppink}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}

head {margin:auto;
text-align: center;}

table {
    border: 1px;
    color: darkred;
    border-style: dashed;
    padding: 5px;
    column-span: 10px
}

tr { border: 1px;
    border-color:darkorange;
    border-style:dashed;
}
    
    td { border: 1px;
    border-color:darkorange;
    border-style:dashed;
padding:5px;
}