.body,
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.table-desktop{
  width:  100%;
  border-collapse: collapse;
}
.table-desktop tr th{
  background-color: blue;
  color: white;
  border: 1px solid #909090;
  padding: 5px;
  text-align: left;
}