.wrapper {
  width: auto;
  max-width: 900px;
  margin: 0 auto;
}
table {
  width: 100%;
  box-sizing: border-box;
  border-collapse: collapse;
  border-spacing: 0;
  margin-bottom: 24px;
}
table td {
  padding: 6px 12px;
  border: 1px solid #aaa;
  box-sizing: border-box;
}
table td:first-child {
  width: 20%;
  font-weight: bold;
  background: #eee;
}

@media screen and (max-width: 640px) {
  table td {
      display: block;
  }
  table td:first-child {
      width: 100%;
  }
}