.body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 50vh;
  }
  
  .birthday-gift {
    position: relative;
  }
  
  .birthday-gift:before {
    content:"";
    position: absolute;
    width: 170px;
    height:20px;
    border-radius:50%;
    background-color: rgba(0,0,0,0.4);
    top:90px;
    left:-10px;
  }
  
  input#click {
    display: none;
  }
  
  .gift {
    position: relative;
    width: 150px;
    height: 100px;
    background-color: #e9c46a;
  }
  
  .gift:before {
    content:"";
    position: absolute;
    width: 25px;
    height: 100px;
    background-color: #e76f51;
    left:62px;
  }
  
  .gift:after {
    content:"";
    position: absolute;
    box-shadow: inset 0 10px rgba(0,0,0,0.3);
    width: 150px;
    height: 100px;
  }
  
  .click {
    position: absolute;
    background-color: #e9c46a;
    width: 170px;
    height: 40px;
    top:-40px;
    left:-10px;
    transform-origin: bottom left;
    transition: .3s;
    cursor: pointer;
  }
  
  .click:before {
    content:"";
    position: absolute;
    width: 25px;
    height: 40px;
    background-color: #e76f51;
    left:69px;
  }
  
  .click:after {
    content:"";
    position: absolute;
    width: 5px;
    height: 0;
    border-bottom: 30px solid #e76f51;
    border-top: 30px solid #e76f51;
    border-left: 0px solid transparent;
    border-right: 30px solid transparent;
    transform: rotate(-90deg);
    left:65px;
    top:-47px;
  }
  
  #click:checked + .click {
    transform: rotate(-110deg) scaleX(0.85);
  }
  
  .wishes {
    position: absolute;
    transition: .5s;
    color: #333;
    font-size: 28px;
    text-align: center;
    z-index:-1;
    left:5px;
    bottom: 15px;
  }
  
  #click:checked ~ .wishes {
    transform: translateY(-100px);
  }
  
  #click:checked ~ .sparkles {
    display: block;
  }
  
  
  
  .sparkles {
    position: absolute;
    display: none;
    top:-15px;
    z-index:-2;
    left:40px;
  }
  
  .spark1, .spark2, .spark3, .spark4, .spark5, .spark6 {
    position: absolute;
    background-color: #fee440;
    border-radius:50%;
    top:-9px;
    z-index:-1;
  }
  
  .spark1 {
    width: 8px;
    height:8px;
    left:30px;
    top:-9px;
    animation: fire 0.9s ease-in-out infinite, color 0.4s linear infinite;
  }
  
  .spark1:before {
    content:"";
    position: absolute;
    width:5px;
    height:5px;
    top:8px;
    left:11px;
    background-color: #fee440;
    border-radius:50%;
  }
  
  .spark2 {
    width: 9px;
    height:9px;
    left:33px;
    top:-5px;
    animation: fire2 0.28s ease-in-out infinite, color 0.4s linear infinite;
  }
  
  .spark2:before {
    content:"";
    position: absolute;
    width:5px;
    height:5px;
    top:12px;
    left:3px;
    background-color: #fee440;
    border-radius:50%;
  }
  
  .spark3 {
    width: 8.5px;
    height:8.5px;
    left:33px;
    top:-5px;
    animation: fire3 0.36s ease-in-out infinite, color2 0.4s linear infinite;
  }
  
  .spark3:before {
    content:"";
    position: absolute;
    width:5px;
    height:5px;
    top:12px;
    left:-1px;
    background-color: #fee440;
    border-radius:50%;
  }
  
  .spark4 {
    width: 7px;
    height:7px;
    left:27px;
    top:-5px;
    animation: fire2 0.24s ease-in-out infinite, color2 0.2s linear infinite;
  }
  
  .spark5 {
    width: 7px;
    height:7px;
    left:29px;
    top:-5px;
    animation: fire3 0.45s ease-in-out infinite, color 0.2s linear infinite;
  }
  
  .spark6 {
    width: 6px;
    height:6px;
    left:29px;
    top:-5px;
    animation: fire 0.35s ease-in-out infinite, color2 0.2s linear infinite;
  }
    
  @keyframes fire3 {
    100% { transform:translateX(20px) translateY(-93px); 
           opacity: 0.3; }
  }
  
  @keyframes fire2 {
    100% { transform:translateX(-5px) translateY(-90px); 
           opacity: 0.3; }
  }
  
  @keyframes fire {
    100% { transform:translateX(-25px) translateY(-95px); 
           opacity: 0.3; }
  }
  
  @keyframes color {
    from {background-color: #d00000;}
    to {background-color: #0081a7;}
  }
  
  @keyframes color2 {
    from {background-color: #8cff00;}
    to {background-color: #1d2d44;}
  }  

  /* The switch - the box around the slider */
.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
  float: left;
}

/* Hide default HTML checkbox */
.switch input {display:none;}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #f44336;
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input.default:checked + .slider {
  background-color: #444;
}
input.primary:checked + .slider {
  background-color: #2196F3;
}
input.success:checked + .slider {
  background-color: #8bc34a;
}
input.info:checked + .slider {
  background-color: #3de0f5;
}
input.warning:checked + .slider {
  background-color: #FFC107;
}
input.danger:checked + .slider {
  background-color: #f44336;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}