Pure CSS Valentine's Day Animation

To learn how to create the CSS Valentine’s Day Animation follow the steps below and watch the video tutorial.

Demo:

*to see the animation on the website click here.

Step1.

Add HTML

<div class="happy-valentines">
<div class="valentines-day-card">
  <div class="clouds"></div>
  <div class="hearts">
    <div class="heartOne">
      <div class="left-side"></div>
      <div class="right-side"></div>
    </div>
    <div class="heartTwo">
      <div class="left-side"></div>
      <div class="right-side"></div>
    </div>
        <div class="heartThree">
      <div class="left-side"></div>
      <div class="right-side"></div>
    </div>
     <div class="heartFour">
      <div class="left-side"></div>
      <div class="right-side"></div>
    </div>
     <div class="heartFive">
     <div class="left-side"></div>
      <div class="right-side"></div>
    </div>
  </div>
  <div class="text"><span>Happy Valentine's</br> Day!</div>
</div>
<p class="hover">- hover over the text -</p>
</div>

Step2.

Add CSS

Import the font:

Font source: Google Fonts

To read how to import the font in CSS click here.

@import url('https://fonts.googleapis.com/css2?family=Pacifico&display=swap');

Set the colour and the position of the background and elements:

body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #ff758f;
}

Style the card:

.valentines-day-card {
  position: relative;
  width: 400px;
  height: 300px;
  background-color: #ff8fa3;
  overflow: hidden;
  border:10px solid white;
  border-radius:10px;
  box-shadow: 0 0 100px rgba(0,0,0,.4);
}

.valentines-day-card:before {
  content:"";
  position: absolute;
  background-color: #ffb3c1;
  width:100px;
  height:100px;
  border-radius:50%;
  top:140px;
  left:-25px;
  box-shadow:60px 20px #ffb3c1,130px 10px #ffb3c1, 190px 20px #ffb3c1,260px -5px #ffb3c1, 340px 20px #ffb3c1;
}

.valentines-day-card:after {
  content:"";
  position: absolute;
  background-color: #ffccd5;
  width:100px;
  height:100px;
  border-radius:50%;
  top:160px;
  left:-40px;
  box-shadow: 50px 20px #ffccd5,120px 40px #ffccd5, 200px 15px #ffccd5,260px 30px #ffccd5, 330px 30px #ffccd5,380px 10px #ffccd5;
}

.clouds {
  position: absolute;
  width:100px;
  height:100px;
  border-radius:50%;
  background-color: #fff0f3;
  z-index:5;
  top:210px;
  left:-20px;
  box-shadow: 55px 30px #fff0f3, 125px 10px #fff0f3,175px 20px #fff0f3, 250px 10px #fff0f3, 320px 5px #fff0f3, 380px 10px #fff0f3;
}

Add and animate hearts:

.hearts {
  position: absolute;
  z-index:2;
}

.heartOne {
  position: absolute;
  left:100px;
  top:250px;
  animation: up 4s linear forwards 1s;
}

.heartTwo {
  position: absolute;
  left:270px;
  top:230px;
  animation: up 5s linear forwards 1.8s;
}

.heartThree {
  position: absolute;
  left:85px;
  top:415px;
  animation: up 5s linear forwards 3s;
}

.heartFour {
  position: absolute;
  left:320px;
  top:380px;
  animation: upTwo 9s linear infinite 3.5s;
}

.heartFive {
  position: absolute;
  left:150px;
  top:400px;
  animation: upTwo 13s linear infinite 4.5s;
}

.right-side:before, .right-side:after {
  position: absolute;
  content:"";
  transform-origin: left;
  animation: move 1s ease infinite;
}

.right-side:before {
  border-radius:50% 50% 50% 0;
  width:21px;
  height:20px;
  background-color: #c9184a;
  left:-0.26px;
}

.right-side:after {
  height:0;
  width:0;
  border-bottom:10px solid transparent;
  border-left: 15px solid #c9184a;
  top:19px;
  left:-0.26px;
}

@keyframes move {
  0%, 100% {transform: rotateY(0);}
  50% {transform: rotateY(-45deg);}
}

.left-side:before, .left-side:after {
  position: absolute;
  content:"";
  transform-origin: right;
  animation: move 1s ease infinite;
}

.left-side:before {
  border-radius:50% 50% 0 50%;
  width:20px;
  height:20px;
  left:-20.7px;
  background-color: #ff4d6d;
}

.left-side:after {
  height:0;
  width:0;
  left:-15px;
  border-bottom:10px solid transparent;
  border-right: 15px solid #ff4d6d;
  top:19px;
}

@keyframes up {
  0% {transform: translateY(0);}
  100% {transform: translateY(-200px);}
}

@keyframes upTwo {
  0% {transform: translateY(0);}
  100% {transform: translateY(-450px);}
}

Style and animate the text:

.text {
  position: absolute;
  color: #800f2f;
  font-size:30px;
  font-family: 'Pacifico', cursive;
  line-height:1;
  text-align: center;
  width:380px;
  left:10px;
  z-index:3;
  top:320px;
  animation: up 1s ease forwards;
  transition: .2s;
}

.hover {
  color: white;
  font-family: 'Pacifico', cursive;
  text-align: center;
}

.text:hover span {
  display: none;
}

.text:hover:before {
  content:"Remember not to eat too much candy—you're sweet enough already.";
  font-size:25px;

}

Watch also the video tutorial: