table {
  border-collapse: collapse;
  width: 100%;
}

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

th, td {
  padding: 8px;
  text-align: left;
}

tr:nth-child(even) {
  background-color: #f9f9f9;
}

tr:hover {
  background-color: #f1f1f1;
}

th {
  background-color: #4CAF50;
  color: white;
}

th.sort-asc::after {
  content: " ▲";
}

th.sort-desc::after {
  content: " ▼";
}