.container { text-align: center; }

#result { width: 400px; max-width: 100%; background-color: #cde;overflow-x: scroll; text-align: right; margin: 0 auto; white-space: nowrap; outline: 1px solid #ccc; }
table { width: 400px; padding: 0; max-width: 100%; display: block; margin: 0 auto; }
tbody { display: block; }
tr { display: flex; }
td {
  display: block;
  width: 25%;
  height: 50px;
  line-height: 50px;
  background-color: #eee;
  outline: 1px solid #ccc;
  border: 0;
  padding: 0;
  user-select: none;
  -khtml-user-select: none;
  -o-user-select: none;
  -moz-user-select: -moz-none;
  -webkit-user-select: none;
}
td[colspan="2"] { width: 50%; }