#tbb {
  display: block;
  margin: 0 auto;
  max-width: 600px;
  overflow: hidden; }
  #tbb .col {
    display: block;
    margin: 0 auto;
    width: calc(50% - 1rem); }
    @media screen and (max-width: 600px) {
      #tbb .col {
        width: 100%; } }
  #tbb .col:nth-child(odd) {
    clear: left;
    float: left; }
    @media screen and (max-width: 600px) {
      #tbb .col:nth-child(odd) {
        float: none; } }
  #tbb .col:nth-child(even) {
    clear: right;
    float: right; }
    @media screen and (max-width: 600px) {
      #tbb .col:nth-child(even) {
        float: none; } }
  #tbb .third {
    display: block;
    margin: 0 1.5rem 0 auto;
    width: calc(33.33% - 1rem);
    float: left; }
  #tbb .last {
    margin-right: 0; }
  #tbb input {
    margin: 0.5rem auto 1rem auto; }
    @media screen and (max-width: 600px) {
      #tbb input {
        margin: 0.5rem auto; } }
  #tbb button {
    clear: both;
    display: inline-block;
    margin: 1rem auto 0 auto;
    text-align: center; }
  #tbb .hidden {
    display: none; }
  #tbb .btn-wrap {
    display: block;
    text-align: center; }

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