hw_javascript/07/styles.css

table {
  margin-bottom: 20px;
  border: 1px solid #dddddd;
  border-collapse: collapse;
}
table th {
  font-weight: normal;
  text-align: center;
  border: 1px solid #dddddd;
  padding: 5px;
}
table td {
  font-weight: normal;
  text-align: center;
  border: 1px solid #dddddd;
  padding: 5px;
}