style.css

@import url("https://fonts.googleapis.com/css2?family=Fredoka+One&display=swap");
body {
  font-family: "Fredoka One", cursive;
  overflow-x: hidden;
  -webkit-animation: bgcolor 20s infinite;
  animation: bgcolor 10s infinite;
  -webkit-animation-direction: alternate;
  animation-direction: alternate;
}
@keyframes bgcolor {
    0% {
        background-color: #45a3e5
    }

    30% {
        background-color: #66bf39
    }

    60% {
        background-color: #eb670f
    }

    90% {
        background-color: #f35
    }

    100% {
        background-color: #864cbf
    }
}
.container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.text {
  min-width: 600px;
  text-align: center;
  color: white;
  text-shadow: 1px 1px #2E3847;
  font-size: 3em;
}

.splitting .char {
  animation: slide-in 1s cubic-bezier(0.5, 0, 0.5, 1) both;
  animation-delay: calc(60ms * var(--char-index));
}

@keyframes slide-in {
  from {
    transform: translateY(-1em) rotate(-0.5turn) scale(0.5);
    opacity: 0;
  }
}
.presents {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  height: 300px;
  width: 500px;
}

.green {
  position: relative;
  left: -20px;
  width: 100px;
  height: 100px;
  z-index: 1;
}
.green:hover {
  animation: 0.5s green;
}
.green .lid {
  background: #3DDC81;
}
.green .box {
  background-image: radial-gradient(#fff 20%, transparent 20%), radial-gradient(#fff 20%, transparent 20%);
  background-color: #3DDC81;
}
.green .ribbon {
  background: #F75D4C;
}
.green .ribbon::before {
  top: 21%;
}
.green .bow {
  background: #F75D4C;
}
.green .bow::before, .green .bow::after {
  background: #F75D4C;
}
@keyframes green {
  0% {
    width: 100px;
    height: 100px;
  }
  30% {
    width: calc(100px + 10px);
    height: calc(100px - 10px);
  }
  60% {
    width: calc(100px - 10px);
    height: calc(100px + 10px);
  }
  100% {
    width: 100px;
    height: 100px;
  }
}

.orange {
  position: relative;
  left: 20px;
  width: 130px;
  height: 120px;
  z-index: 10;
}
.orange:hover {
  animation: 0.5s orange;
}
.orange .lid {
  background: #FFA726;
}
.orange .box {
  background-image: radial-gradient(#2E3847 20%, transparent 20%), radial-gradient(#2E3847 20%, transparent 20%);
  background-color: #FFA726;
}
.orange .ribbon {
  background: #F75D4C;
}
.orange .ribbon::before {
  top: 21%;
}
.orange .bow {
  background: #F75D4C;
}
.orange .bow::before, .orange .bow::after {
  background: #F75D4C;
}
@keyframes orange {
  0% {
    width: 130px;
    height: 120px;
  }
  30% {
    width: calc(130px + 10px);
    height: calc(120px - 10px);
  }
  60% {
    width: calc(130px - 10px);
    height: calc(120px + 10px);
  }
  100% {
    width: 130px;
    height: 120px;
  }
}

.blue {
  position: relative;
  left: 0;
  width: 120px;
  height: 160px;
  z-index: 0;
}
.blue:hover {
  animation: 0.5s blue;
}
.blue .lid {
  background: #1BB5FE;
}
.blue .box {
  background-image: radial-gradient(transparent 20%, transparent 20%), radial-gradient(transparent 20%, transparent 20%);
  background-color: #1BB5FE;
}
.blue .ribbon {
  background: #3DDC81;
}
.blue .ribbon::before {
  top: 21%;
}
.blue .bow {
  background: #3DDC81;
}
.blue .bow::before, .blue .bow::after {
  background: #3DDC81;
}
@keyframes blue {
  0% {
    width: 120px;
    height: 160px;
  }
  30% {
    width: calc(120px + 10px);
    height: calc(160px - 10px);
  }
  60% {
    width: calc(120px - 10px);
    height: calc(160px + 10px);
  }
  100% {
    width: 120px;
    height: 160px;
  }
}

.present {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}
.present .lid {
  height: 20%;
  width: calc(100% + 10px);
  border: 4px solid #2E3847;
  border-radius: 3px;
  box-shadow: inset 1px 2px rgba(255, 255, 255, 0.5), 5px 0 rgba(0, 0, 0, 0.15);
}
.present .box {
  width: 100%;
  height: 100%;
  background-position: 0 0, 20px 20px;
  background-size: 40px 40px;
  border: 4px solid #2E3847;
  border-top: 0;
  border-bottom-left-radius: 3px;
  border-bottom-right-radius: 3px;
  box-shadow: inset -10px 5px rgba(0, 0, 0, 0.3), 5px 0 rgba(0, 0, 0, 0.15);
}
.present .ribbon {
  position: absolute;
  top: -3px;
  width: 30px;
  height: calc(100% - 5px);
  border: 4px solid #2E3847;
  border-radius: 3px;
  box-shadow: inset 1px 2px rgba(255, 255, 255, 0.5);
}
.present .ribbon::before {
  display: block;
  content: "";
  position: absolute;
  width: 100%;
  height: 5px;
  background: rgba(0, 0, 0, 0.3);
}
.present .bow {
  position: absolute;
  top: -20px;
  width: 20px;
  height: 20px;
  border: 4px solid #2E3847;
  border-radius: 50%;
  box-shadow: inset 2px 2px rgba(255, 255, 255, 0.5), inset -3px -5px rgba(0, 0, 0, 0.3);
}
.present .bow::before, .present .bow::after {
  display: block;
  content: "";
  position: absolute;
  top: -10px;
  width: 30px;
  height: 30px;
  border: 4px solid #2E3847;
  border-radius: 50%;
  box-shadow: inset 2px 2px rgba(255, 255, 255, 0.5), inset -3px -5px rgba(0, 0, 0, 0.3);
  z-index: -1;
}
.present .bow::before {
  left: 15px;
}
.present .bow::after {
  right: 15px;
}