body {
  background-image: url("back.jpg");
  background-size:cover;
  font-size: 30px;
  color: hotpink;
}

h1 {
  font-family: 'Courier New', Courier, monospace;
}

button {
  padding: 0;
  border: none;
  background: none;
  background-image: url('unicorn.png');
  background-size: 175px;
  width: 185px;
  height: 150px;
  
}


button:active {
  animation-play-state: paused;
}

@keyframes fall {
from {
      transform: translateX(600%);
    }
  
    to {
      transform: translateX(-100%);
    }
}


.btn{
  padding: 0;
  border: none;
  background: none;
  background-image: url('unicorn.png');
  background-size: 700px;
  width: 700px;
  height: 700px;
  animation-name: fall;
  animation-duration: 5s;
  animation-iteration-count: infinite;
  animation-play-state: running;
}

.popup{
  width: 400px;
  background: pink;
  border-radius: 6px;
  position: 0;
  top: 50%;;
  left: 50%;
  transform: translate(50%, 50%) scale(0.1); 
  text-align: center;
  padding: 0 5px 30px;
  visibility: hidden;
  transition: transform 2s, top 2s;
}

.open-popup{
  visibility: visible;
  top: 50%;
  transform: translate(-50%, -50%) scale(1);
}

.popup h2{
  font-size: 30px;
}
.popup p{
  font-size: 20px;
}

.popup img{
  width: 50%;
  margin-top: -20px;
  border: none;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.open-popup{
  visibility: visible;
  top: 500%;
  transform: translate(105%, -150%) scale(1); /*controls where popup appears*/
}

.popup button{
  width: 30%;
  margin-top: 10px;
  padding: 10px 0;
  background: rgb(202, 202, 246);
  border: 0;
  outline: none;
  font-size: 18px;
  border-radius: 4px;
  cursor: pointer;
  box-shadow: 0 5px 5px rgb(195, 169, 213);
}

#overlay {
  position: fixed;
  opacity: 0;
  transition: 200ms ease-in-out;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, .5);
  pointer-events: none;
  z-index: -1;
}

#overlay.active {
  opacity: 1;
  pointer-events: all;
}

#back button{
width: 10px;
height: 10px;
background: rgb(202, 202, 246);
border: 0;
outline: none;
font-size: 18px;
border-radius: 4px;
cursor: pointer;
box-shadow: 0 5px 5px rgb(195, 169, 213);
}