情人节快乐 / CSS 情书/ 卡片

            
            body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #fae1dd;
}

.container {
  position: relative;
}

.valentines {
  position: relative;
  top:50px;
  cursor: pointer;
  animation: up 3s linear infinite;
}

@keyframes up {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-30px);
  }
}


.envelope {
  position: relative;
  width: 300px;
  height:200px;
  background-color: #f08080; 
}

.envelope:before {
  background-color: #f08080; 
  content:"";
  position: absolute;
  width: 212px;
  height: 212px;
  transform: rotate(45deg);
  top:-105px;
  left:44px;
  border-radius:30px 0 0 0;
}

.card {
  position: absolute;
  background-color: #eae2b7;
  width: 270px;
  height: 170px;
  top:5px;
  left:15px;
  box-shadow: -5px -5px 100px rgba(0,0,0,0.4); 
}

.card:before {
  content:"";
  position: absolute;
  border:3px solid #003049;
  border-style: dotted;
  width: 240px;
  heighT: 140px;
  left:12px;
  top:12px;
}

.text {
  position: absolute;
  font-family: 'Brush Script MT', cursive;
  font-size: 28px;
  text-align: center;
  line-height:25px;
  top:19px;
  left:85px;
  color: #003049;
}

.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;
}

.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 1.7s 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;
  }
}

.front {
  position: absolute;
  border-right: 180px solid #f4978e;
  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 #f8ad9d;
  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 scale {
  0%, 100% {
    transform: scaleX(1);
  }
  50% {
    transform: scaleX(0.85);
  }
}

.container {
  .card {
    transition: all 0.5s ;
  }
  &:hover {
    .card {
      transform: translateY(-90px)
    }
  }
}