ul ul{
   margin-top: 0px;
   margin-bottom: 0px;
}
div#index{
   border: 1px solid #333;
   background-color: #ffc;
   width: fit-content;
   min-width: 20em;
}
div#index a.indexlink{
   color: #33f;
}
code.mail{
   background-color: silver;
}

table#tbl_pc_comp {
   border: 1px black solid;
   border-collapse: collapse;
}
table#tbl_pc_comp th, table#tbl_pc_comp td {
   border: 1px black solid;
   border-collapse: collapse;
}