@import url('https://fonts.googleapis.com/css2?family=Mochiy+Pop+P+One&display=swap');
body {
  height: 100vh;
  width: 100vw;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background-image: url('background.jpeg');
  background-attachment: fixed;
  background-position: center;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  background-repeat: no-repeat;
  font-family: 'Mochiy Pop P One', sans-serif;
}
input#open {
  display: none;
}

.valentines-day-card {
  position: relative;
  width: 300px;
  height: 300px;
  transform-style: preserve-3d;
  transform: perspective(2500px);
  transition: 0.3s;
}

.card-front {
  position: relative;
  background-color: #fff0f3;
  width: 300px;
  height: 300px;
  transform-origin: left;
  box-shadow: inset 100px 20px 100px rgba(0, 0, 0, 0.15),
    30px 0 50px rgba(0, 0, 0, 0.3);
  transition: 0.3s;
}

.card-front:before {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  background-color: #001e2a;
  top: 10px;
  left: 10px;
}

.card-inside {
  position: absolute;
  background-color: #fff0f3;
  width: 300px;
  height: 300px;
  z-index: -1;
  left: 0;
  top: 0;
  box-shadow: inset 100px 20px 100px rgba(0, 0, 0, 0.22),
    100px 20px 100px rgba(0, 0, 0, 0.1);
}

.open {
  position: absolute;
  width: 300px;
  height: 300px;
  left: 0;
  top: 0;
  background-color: transparent;
  z-index: 6;
  cursor: pointer;
}

#open:checked ~ .card-front {
  transform: rotateY(-155deg);
  box-shadow: inset 100px 20px 100px rgba(0, 0, 0, 0.13),
    30px 0 50px rgba(0, 0, 0, 0.1);
}

#open:checked ~ .card-front:before {
  z-index: 5;
  background-color: #fff0f3;
  width: 300px;
  height: 300px;
  top: 0;
  left: 0;
  box-shadow: inset 100px 20px 100px rgba(0, 0, 0, 0.1),
    30px 0 50px rgba(0, 0, 0, 0.1);
}
.note {
  position: relative;
  width: 200px;
  height: 150px;
  background-color: #fff0f3;
  top: 75px;
  left: 50px;
  color: #333;
  font-size: 30px;
  display: flex;
  align-items: center;
  text-align: center;
  filter: drop-shadow(0 0 20px rgba(0, 0, 0, 0.3));
}

.note:before,
.note:after {
  position: absolute;
  content: '';
  background-color: #ba1c1c;
  width: 40px;
  height: 40px;
}

.note:before {
  transform: rotate(-45deg);
  top: -20px;
  left: 80px;
}

.note:after {
  border-radius: 50%;
  top: -35px;
  left: 65px;
  box-shadow: 30px 0 #ba1c1c;
}
.text-one {
  position: absolute;
  color: #005f85;
  font-size: 30px;
  top: 30px;
  width: 300px;
  text-align: center;
}

.text-one:before,
.text-one:after {
  position: absolute;
  left: 5px;
  text-align: center;
  width: 300px;
}

.text-one:before {
  content: 'My Little Munchkin';
  top: 40px;
  color: #333;
}

.text-one:after {
  content: 'I Love youu';
  top: 120px;
  color: #d04e4e;
}

.heart {
  position: relative;
  background-color: #d04e4e;
  height: 60px;
  width: 60px;
  top: 220px;
  left: 120px;
  transform: rotate(-45deg);
  animation: 0.8s beat infinite;
}

.heart:before,
.heart:after {
  content: '';
  background-color: #d04e4e;
  border-radius: 50%;
  height: 60px;
  width: 60px;
  position: absolute;
}

.heart:before {
  top: -30px;
  left: 0;
}

.heart:after {
  left: 30px;
  top: 0;
}

.smile {
  position: absolute;
  width: 30px;
  height: 15px;
  background-color: #333;
  z-index: 1;
  border-radius: 0 0 100px 100px;
  top: 240px;
  left: 135px;
  overflow: hidden;
}

.smile:before {
  content: '';
  position: absolute;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  background-color: #030202;
  top: 5px;
  left: 5px;
}

.eyes {
  position: absolute;
  border-radius: 50%;
  background-color: #333;
  width: 10px;
  height: 10px;
  z-index: 1;
  top: 230px;
  left: 165px;
  box-shadow: -40px 0 #333;
  transform-origin: 50%;
  animation: close 2s infinite;
}

@keyframes close {
  0%,
  100% {
    transform: scale(1, 0.05);
  }
  5%,
  95% {
    transform: scale(1, 1);
  }
}

@keyframes beat {
  0%,
  40%,
  100% {
    transform: scale(1) rotate(-45deg);
  }
  25%,
  60% {
    transform: scale(1.1) rotate(-45deg);
  }
}