body {
  font-family: Lato;
  line-height: 1em;
  font-size: 14px;
  
}
body,
.container {
  position: absolute;
  width: 100%;
  height: auto;
}
br {
        display: block; /* makes it have a width */
        content: ""; /* clears default height */
        margin-top: 0px; /* change this to whatever height you want it */
}
.container {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -o-flexbox;
  display: -webkit-flex;
  display: flex;
  background-color: #ffffff;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  -ms-flex-direction: column;
  -o-flex-direction: column;
  flex-direction: column;
  width: 100%;
}
.row {
  background-color: #e5e5e5;
  -webkit-flex: 5;
  -moz-flex: 5;
  -ms-flex: 5;
  -o-flex: 5;
  flex: 5;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: row;
  -moz-flex-direction: row;
  -ms-flex-direction: row;
  -o-flex-direction: row;
  flex-direction: row;
}

.square {
  width: 350px;
  background-color: #ffffff;
  -webkit-flex: 4;
  -moz-flex: 4;
  -ms-flex: 4;
  -o-flex: 4;
  flex: 4;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  text-align: center;
  -webkit-justify-content: center;
  -moz-justify-content: center;
  -ms-justify-content: center;
  -o-justify-content: center;
  justify-content: center;
  -webkit-flex-flow: column wrap;
  -moz-flex-flow: column wrap;
  -ms-flex-flow: column wrap;
  -o-flex-flow: column wrap;
  flex-flow: column wrap;
  padding: 5px;
  position: relative;
}
.card-container {
  cursor: pointer;
  height: 330px;
  perspective: 600;
  position: relative;
  width: 330px;
  z-index: 0;
}
.card {
  height: 100%;
  position: absolute;
  transform-style: preserve-3d;
  transition: all 1s ease-in-out;
  width: 100%;
 -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.card-flip {
transform: rotateY(180deg);
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
}
.card i{
  position: absolute;
  bottom: 8;
  right: 8;
  color: white;
  z-index: 2;
  -webkit-backface-visibility: hidden;
backface-visibility: hidden;
}
.instruction{
  font-size: 10pt;
  font-family: Lato;
  font-weight: 400;
  text-shadow: 1px 1px 2px #000;
  -webkit-backface-visibility: hidden;
backface-visibility: hidden;
}
.card .side {
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 6px;
  height: 350px;
  position: absolute;
  overflow: hidden;
  width: 100%;
  z-index: 1;
}
.card .back {
  -webkit-backface-visibility: hidden;
backface-visibility: hidden;
  background: #efefef;
  color: #000;
  height: 350px;
  line-height: 2em;
  transform: rotateY(180deg);
  overflow-y: scroll;
  z-index: 1;
}

.column {
  float: left;
  width: 50%;
}

.text {
  padding: 12px;
  text-align: left;
  line-height: 17px;
}
a{
  visibility: hidden;
  position: absolute;
  z-index: 2;
  bottom: 20px;
  left: 20px;
  transition: visibility .4s, opacity .4s;
  transition-delay: .8s;
  opacity: 0;
  color: rgba(0, 0, 0, 0);
}
.visible{
  color: blue;
  visibility: visible;
  opacity: 1;
}
a:hover{
  color: purple;
}