body {
 height: 100vh;
 background-color: #073b4c;
}

.body {
 display: flex;
 align-items: center;
 justify-content: center;
 margin-top: 100px;
}

h2 {
 animation: 1s blink linear infinite;
 display: flex;
 justify-content: center;
}

.birthdayCard {
  position: relative;
  width: 250px;
  height:350px;
  cursor: pointer;
  transform-style: preserve-3d;
	transform: perspective(2500px);
  transition: 1s;
}

.cardFront {
  position: relative;
  background-color: #fff;
  width: 250px;
  height:350px;
  overflow: hidden;
  transform-origin: left;
  box-shadow: inset 100px 20px 100px rgba(0,0,0,.2), 30px 0 50px rgba(0,0,0,0.4);
  transition: .6s;
}

.happy {
  font-family: Tahoma, sans-serif;
  text-align: center;
  margin:30px; 
  background-image: linear-gradient(120deg, #f6d365 0%, #fda085 100%);
  transition: .1s;
}
  
  .balloons {
  position: absolute;
}

.balloonOne, .balloonTwo, .balloonThree, .balloonFour {
  position: absolute;
  width: 85px;
  height:95px;
  border-radius:50%;
}

.balloonOne {
  background-color: rgb(239, 71, 111, 0.7);
  left:-10px;
  top:50px;
}

.balloonTwo {
  background-color: rgb(6, 214, 160, 0.7);
  left:50px;
  top:20px;
}

.balloonThree {
  background-color: rgb(255, 209, 102, 0.7);
  left:110px;
  top:50px;
}

.balloonFour {
  background-color: rgb(17, 138, 178, 0.7);
  left:170px;
  top:20px;
}

.balloonOne:before, .balloonTwo:before, .balloonThree:before, .balloonFour:before {
  content:"";
  position: absolute;
  width:1px;
  height: 155px;
  background-color: #ffd166;
  top:95px;
  left:43px;
}
.balloonOne:after, .balloonTwo:after, .balloonThree:after, .balloonFour:after 
{
  content:"";
  position: absolute;
  border-right: 7px solid transparent;
  border-left: 7px solid transparent;
  top:94px;
  left:37px;
}

.balloonOne:after {
  border-bottom: 10px solid #ef476f;
}

.balloonTwo:after {
  border-bottom: 10px solid #06d6a0;
}

.balloonThree:after {
  border-bottom: 10px solid #ffd166;
}

.balloonFour:after {
  border-bottom: 10px solid #118ab2;
}

.cardInside {
  position: absolute;
  background-color: #fff;
  border: 2px solid yellowgreen;
  width: 250px;
  height:350px;
  z-index:-1;
  left:0;
  top:0;
  box-shadow: inset 100px 20px 100px rgba(0,0,0,0.2);
}

p {
  font-family: cursive;
  margin: 40px;
  color: #333;
}

.name {
  position: absolute;
  left:150px;
  top:200px;
  color: #333;
  text-decoration: underline;
}

.back {
  font-family: Tahoma, sans-serif;
  color: #333;
  text-align: center;
  margin:30px; 
  outline-color:#333;
  outline-style: dotted;
}

.birthdayCard:hover {
	transform: perspective(2500px) rotate(5deg);
	box-shadow: inset 100px 20px 100px rgba(0,0,0,.2), 0 10px 100px rgba(0,0,0,0.5);
}

.birthdayCard:hover .cardFront {
  transform: rotateY(-160deg); 
}

.birthdayCard:hover .happy {
  visibility:hidden; 
}

@keyframes blink {
 0% {
  color: white;
 }

 20% {
  color: yellow;
 }

 40% {
  color: greenyellow;
 }

 60% {
  color: red;
 }

 80% {
  color: hotpink;
 }

 100% {
  color: blue;
 }
}