#cenik-tb {
    color: black;
    width: 90%;
    border-spacing: 0;
    margin: auto;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid black;
}
#cenik-tb td, #cenik-tb th {
    border: 1px solid black;
    padding: 10px;
    border-right: 0;
    border-bottom: 0;
}
#cenik-tb th {
    text-align: left;
    border-left: 0;
}
#cenik-tb td {
    text-align: right;
}
#cenik-tb tr:first-child th:first-child {
  border-top-left-radius: 10px;
  border-top: 0;
}
#cenik-tb tr:first-child td:last-child {
  border-top-right-radius: 10px;
  border-top: 0;
}
#cenik-tb tr:last-child th:first-child {
  border-bottom-left-radius: 10px;
}
#cenik-tb tr:last-child td:last-child {
  border-bottom-right-radius: 10px;
}