@media screen and (max-width: 800px) {
  .fixedWidth { width: 95%; }
  .flippable {

    float: none;
    margin: auto;
    margin-bottom: 4em;
  }
}

@media screen and (max-width: 600px) {
  /* head not fixed */
  .head { 
    position: relative;
  }
  .content {
    margin-top: 1em;
  }
  /**/
  .head h1 { display: none; }
  .head .navi a { border-color: #001b41;}

  .question .option {
    zoom: 0.4;
  }
  .question .title { 
    font-size: 20px;
  }


  /* cards not zoomed */
  .flippable {
    float: none;
    margin-bottom: 2em;
  }
  .flippable {
    transform: scale(1.0) !important;
  }
  .face.flipped {
    transform: rotateY(180deg) scale(1.0) !important;
  }
  /**/
}