styles.css

body {
    display: flex;
    justify-content: center;
    align-items: center; 
    height: 100vh;
    background-color: #fdc3c9;
  }
  
  .container {
    position: relative;
    margin-top: 200px;
  }
  .valentines {
    position: relative;
    top:50px;
    cursor: pointer;
    animation: up 3s linear infinite;
  }
  
  .envelope {
    position: relative;
    width: 300px;
    height:200px;
    background-color: #8202d2; 
    border: 2px solid #ac32f8;
    border-radius: 5px;
}
.envelope:before {
  background-color: #8202d2; 
  content:"";
  position: absolute;
  width: 212px;
  height: 212px;
  transform: rotate(45deg);
  top:-105px;
  left:44px;
  border-radius:30px 0 0 0;
}
.card {
  position:relative;
  background-color: #ecbae6;
  width: 270px;
  height: 170px;
  bottom: 190px;
  left:15px;
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  box-shadow: -5px -5px 100px rgba(0,0,0,0.4); 
  animation: cd 6s linear infinite;  
}
@keyframes cd {
    0% {
      transform: translateY(0);
    }
    100% {
      transform: translateY(-100px);
    }
  }
  .card:before {
    content:"";
    position: absolute;
    border:3px solid #a504f6;
    border-style: dotted;
    width: 240px;
    heighT: 140px;
    left:12px;
    top:12px;
    bottom: 0px;
  }
  .text {
    position: absolute;
    font-family: 'Brush Script MT', cursive;
    
    font-size: 25px;
    text-align: center;
    line-height:25px;
    top:19px;
    left:60px;
    color: #003049;
  }
  
  .texts {
    position: absolute;
    font-family: 'Brush Script MT', cursive;
    font-size: 27px;
    text-align: center;
    line-height:25px;
    top:70px;
    left:50px;
    color: #e11111;
  }
  .heart {
    background-color: #d62828;
    display: inline-block;
    height: 30px;
    margin: 0 10px;
    position: relative;
    top: 110px;
    left:105px;
    transform: rotate(-45deg);
    width: 30px;
  }
  .heart:before,
  .heart:after {
    content: "";
    background-color: #d62828;
    border-radius: 50%;
    height: 30px;
    position: absolute;
    width: 30px;
  }
  
  .heart:before {
    top: -15px;
    left: 0;
  }
  .heart:after {
    left: 15px;
    top: 0;
  }
  .front {
    position: absolute;
    border-right: 180px solid #8202d2;
    border-top: 95px solid transparent;
    border-bottom: 100px solid transparent;
    left:120px;
    top:5px;
    width:0;
    height:0;
    z-index:10;
  }
  .front:before {
    position: absolute;
    content:"";
    border-left: 300px solid #ac32f8;
    border-top: 195px solid transparent;
    left:-120px;
    top:-95px;
    width:0;
    height:0;
  }
  
  .shadow {
    position: absolute;
    width: 330px;
    height: 25px;
    border-radius:50%;
    background-color: rgba(0,0,0,0.3);
    top:265px;
    left:-15px;
    animation: scale 3s linear infinite;
    z-index:-1;
  }
  
  @keyframes up {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-30px);
    }
  }
  
  @keyframes scale {
    0%, 100% {
      transform: scaleX(1);
    }
    50% {
      transform: scaleX(0.85);
    }
  }
  
  .hearts {
    position: absolute  
  }
  .one, .two, .three, .four, .five {
    background-color: red;
    display: inline-block;
    height: 10px;
    margin: 0 10px;
    position: relative;  transform: rotate(-45deg);
    width: 10px;
    top:50px;
  }
  
  .one:before,
  .one:after, .two:before, .two:after, .three:before, .three:after, .four:before, .four:after, 
  .five:before, .five:after {
    content: "";
    background-color: red;
    border-radius: 50%;
    height: 10px;
    position: absolute;
    width: 10px;
  }
  
  .one:before, .two:before, .three:before, .four:before, .five:before {
    top: -5px;
    left: 0;
  }
  .one:after, .two:after, .three:after, .four:after, .five:after {
    left: 5px;
    top: 0;
  }
  
  .one {
    left:10px;
    animation: heart 1s ease-out infinite; 
  }
  .two {
    left:30px;
    animation: heart 2s ease-out infinite; 
  }
  .three {
    left:50px;
    animation: heart 1.5s ease-out infinite;
  }
  .four {
    left:70px;
    animation: heart 2.3s ease-out infinite;
  }
  .five {
    left:90px;
    animation: heart 1.8s ease-out infinite;
  }
  @keyframes heart {
    0%{
      transform: translateY(0) rotate(-45deg) scale(0.3);
      opacity: 1;
    }
    100%{
      transform: translateY(-150px) rotate(-45deg) scale(1.3);
      opacity: 0.5;
    }
  }