table, tr, td, th {
  border: 1px solid;
}

table {
  border-spacing: 0;
  width: 100%;
  display: table;
}

table tr:last-child td:first-child, tr:last-child, table {
  border-bottom-left-radius: 25px;
}

table tr:last-child td:last-child, tr:last-child, table {
  border-bottom-right-radius: 25px;
}

table tr:first-child th:first-child, tr:first-child, table {
  border-top-left-radius: 25px;
}

table tr:first-child th:last-child, tr:first-child, table {
  border-top-right-radius: 25px;
}