23/23 100% критику пожалуйста

<h1>Итоговая таблица</h1>
<table>
  <tr>
    <th>Город</th>
    <th>Посещений</th>
    <th>%</th>
  </tr>
  <tr>
    <td>СПб</td>
    <td>199</td>
    <td>65.12</td>
  </tr>
  <tr>
    <td>Москва</td>
    <td>69</td>
    <td>21.3</td>
  </tr>
  <tr>
    <td>Киев</td>
    <td>5</td>
    <td>8</td>
  </tr>
  <tr>
    <td colspan="2">Посещений за весь период</td>
    <td>273</td>
  </tr>
</table>
------------CSS-----------
body {

width: 350px;
margin: 0;
padding: 0 10px;

font-size: 14px;
font-family: “Arial”, sans-serif;
}

table {
width: 350px;
border-collapse: collapse;
}

th, td {
width: 33%;
padding: 10px;
}

th {
color: white;
border-top: 1px solid black;
border-bottom: 1px solid black;
}

td {
border-top: 1px solid lightgray;
border-bottom: 1px solid lightgray;
}

th:first-child,
td:first-child{
text-align: left;
}

th:nth-child(2),
td:nth-child(2){
text-align: center;
}

th:last-child,
td:last-child{
text-align: right;
}

th:first-child,
th:last-child{
background-color: darkcyan;
}
th:nth-child(2){
background-color: lightblue;
}

tr:nth-child(odd){
background-color: lightyellow;
}