body {
      font-family: sans-serif;
      }

div.frame {
           border: 1px solid black;
           height: 100%;
           width: 100%;
           }

div.frameWrapper {
                  border: 1px solid white;
                  width: 8em;
                  height: 8em;
                  float: left;
                  margin: 4px;
                  }

div.question {
              display: flex;
              text-align: center;
              align-items: center;
              justify-content: center;
              height: 100%;
              width: 100%;
              }

div.answer {
            display: none;
            text-align: center;
            align-items: center;
            justify-content: center;
            height: 100%;
            width: 100%;
            }