body {
  margin: 0;
  padding: 0;
  font-family: arial;
  font-size: 14px;
}

* {
  outline: none;
}


h2 {
  font-size: 22px;
  margin: 15px 0;
}

a {
  color: black;
}

.cards {
  font-size: 0;
}

.card {
  width: 233px;
  display: inline-block;
  font-size: 14px;
  height: 290px;
  overflow: hidden;
  margin-right: 32px;
}

.card:last-child {
  margin-right: 0;
}

.card img {
  display: block;
  max-width: 100%;
}

.buttons {
  margin-top: 15px;
  white-space: nowrap;
  font-size: 0;
  text-align: right;
}

.buttons input {
  border: 0 none;
  width: 110px;
  height: 35px;
  border-radius: 2px;
  background: #f90;
  color: black;
  display: inline-block;
  cursor: pointer;
  font-size: 16px;
}

.buttons input:first-child {
  float: left;
}

.buttons input:hover {
  background: #FFB13D;
}

.row {
  height: 290px;

}

.front, .back {
  background: white;
}

.again {
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 20px;
  visibility: hidden;
}

.text {
  display: none;
}

.sad {
  display: inline-block;
  background: url(../img/sad.png);
  width: 20px;
  height: 20px;
  background-size: cover;
  vertical-align: middle;
  margin-left: 5px;
}