.responsive {
  width: 100%;
  height: auto;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
  border: 1px solid #ddd;
}

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

tr:nth-child(even){background-color: #f2f2f2;}