CSS quests

*,
*:before,
*:after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
@-webkit-keyframes fire {
  0% {
    -webkit-transform: scale(0.8) rotate(-10deg);
            transform: scale(0.8) rotate(-10deg);
  }
  10% {
    -webkit-transform: scale(1) rotateY(90deg);
            transform: scale(1) rotateY(90deg);
  }
  20% {
    -webkit-transform: scale(1.2) rotate(0deg);
            transform: scale(1.2) rotate(0deg);
  }
  40% {
    -webkit-transform: scale(0.8) rotate(10deg);
            transform: scale(0.8) rotate(10deg);
  }
  50% {
    -webkit-transform: scale(0.6) rotateY(-90deg);
            transform: scale(0.6) rotateY(-90deg);
  }
  60% {
    -webkit-transform: scale(0.8) rotate(-10deg);
            transform: scale(0.8) rotate(-10deg);
  }
  70% {
    -webkit-transform: scale(0.5) rotateY(60deg);
            transform: scale(0.5) rotateY(60deg);
  }
  80% {
    -webkit-transform: scale(1.1) rotate(15deg);
            transform: scale(1.1) rotate(15deg);
  }
  100% {
    -webkit-transform: scale(0.8) rotate(-10deg);
            transform: scale(0.8) rotate(-10deg);
  }
}
@keyframes fire {
  0% {
    -webkit-transform: scale(0.8) rotate(-10deg);
            transform: scale(0.8) rotate(-10deg);
  }
  10% {
    -webkit-transform: scale(1) rotateY(90deg);
            transform: scale(1) rotateY(90deg);
  }
  20% {
    -webkit-transform: scale(1.2) rotate(0deg);
            transform: scale(1.2) rotate(0deg);
  }
  40% {
    -webkit-transform: scale(0.8) rotate(10deg);
            transform: scale(0.8) rotate(10deg);
  }
  50% {
    -webkit-transform: scale(0.6) rotateY(-90deg);
            transform: scale(0.6) rotateY(-90deg);
  }
  60% {
    -webkit-transform: scale(0.8) rotate(-10deg);
            transform: scale(0.8) rotate(-10deg);
  }
  70% {
    -webkit-transform: scale(0.5) rotateY(60deg);
            transform: scale(0.5) rotateY(60deg);
  }
  80% {
    -webkit-transform: scale(1.1) rotate(15deg);
            transform: scale(1.1) rotate(15deg);
  }
  100% {
    -webkit-transform: scale(0.8) rotate(-10deg);
            transform: scale(0.8) rotate(-10deg);
  }
}
@-webkit-keyframes stars {
  0% {
    opacity: .5;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: .5;
  }
}
@keyframes stars {
  0% {
    opacity: .5;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: .5;
  }
}
body {
  background-image: -webkit-linear-gradient(bottom, #000, #203);
  background-image: linear-gradient(to top, #000, #305);
  height: 100vh;
  width: 100%;
  overflow: hidden;
}
.ground {
  background: #000;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 25vh;
}
.ground:before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  background: #000;
  height: 50vh;
  width: 50vh;
  border-radius: 50%;
  -webkit-transform: translateX(-50%) translateY(-10%);
          transform: translateX(-50%) translateY(-10%);
}
.fire-wrapper {
  height: 50vh;
  width: 50vh;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(-50%);
          transform: translateX(-50%) translateY(-50%);
}
.fire-wrapper .fire-element {
  background-image: -webkit-linear-gradient(bottom, #f00, #ff0);
  background-image: linear-gradient(to top, #f00, #ff0);
  height: 50%;
  width: 10%;
  border-radius: 100% 0;
  position: inherit;
  left: 50%;
  bottom: 0;
  -webkit-animation: 1.5s fire infinite;
          animation: 1.5s fire infinite;
}
.fire-wrapper .fire-element:nth-of-type(1) {
  height: 100%;
  left: 50%;
  -webkit-animation-delay: .1s;
          animation-delay: .1s;
}
.fire-wrapper .fire-element:nth-of-type(2) {
  height: 90%;
  left: 55%;
  -webkit-animation-delay: .2s;
          animation-delay: .2s;
}
.fire-wrapper .fire-element:nth-of-type(3) {
  height: 80%;
  left: 45%;
  -webkit-animation-delay: .3s;
          animation-delay: .3s;
}
.fire-wrapper .fire-element:nth-of-type(4) {
  height: 70%;
  left: 60%;
  -webkit-animation-delay: .4s;
          animation-delay: .4s;
}
.fire-wrapper .fire-element:nth-of-type(5) {
  height: 60%;
  left: 40%;
  -webkit-animation-delay: .5s;
          animation-delay: .5s;
}
.fire-wrapper .fire-element:nth-of-type(6) {
  height: 50%;
  left: 65%;
  -webkit-animation-delay: .6s;
          animation-delay: .6s;
}
.fire-wrapper .fire-element:nth-of-type(7) {
  height: 40%;
  left: 35%;
  -webkit-animation-delay: .7s;
          animation-delay: .7s;
}
.fire-wrapper .fire-element:nth-of-type(8) {
  height: 30%;
  left: 70%;
  -webkit-animation-delay: .8s;
          animation-delay: .8s;
}
.fire-wrapper .fire-element:nth-of-type(9) {
  height: 20%;
  left: 30%;
  -webkit-animation-delay: .9s;
          animation-delay: .9s;
}
.fire-wrapper .fire-element:nth-of-type(10) {
  height: 10%;
  left: 75%;
  -webkit-animation-delay: 1s;
          animation-delay: 1s;
}
.fire-wrapper .fire-element:nth-of-type(11) {
  height: 60%;
  left: 50%;
  -webkit-animation-delay: .1s;
          animation-delay: .1s;
}
.fire-wrapper .fire-element:nth-of-type(12) {
  height: 50%;
  left: 55%;
  -webkit-animation-delay: .2s;
          animation-delay: .2s;
}
.fire-wrapper .fire-element:nth-of-type(13) {
  height: 40%;
  left: 45%;
  -webkit-animation-delay: .3s;
          animation-delay: .3s;
}
.fire-wrapper .fire-element:nth-of-type(14) {
  height: 30%;
  left: 60%;
  -webkit-animation-delay: .4s;
          animation-delay: .4s;
}
.fire-wrapper .fire-element:nth-of-type(15) {
  height: 20%;
  left: 40%;
  -webkit-animation-delay: .5s;
          animation-delay: .5s;
}
.stars {
  width: 100%;
  height: 100%;
  position: absolute;
}
.stars .star {
  background: #fff;
  height: .5vh;
  width: .5vh;
  border-radius: 50%;
  position: absolute;
  -webkit-animation: 5s stars infinite;
          animation: 5s stars infinite;
  opacity: .5;
}
.stars .star:nth-of-type(1) {
  left: 10%;
  top: 10%;
  -webkit-animation-delay: 1s;
          animation-delay: 1s;
}
.stars .star:nth-of-type(2) {
  left: 5%;
  top: 50%;
  -webkit-animation-delay: 2s;
          animation-delay: 2s;
}
.stars .star:nth-of-type(3) {
  left: 80%;
  top: 5%;
  -webkit-animation-delay: 3s;
          animation-delay: 3s;
}
.stars .star:nth-of-type(4) {
  left: 60%;
  top: 10%;
  -webkit-animation-delay: 4s;
          animation-delay: 4s;
}
.stars .star:nth-of-type(5) {
  left: 90%;
  top: 40%;
  -webkit-animation-delay: 5s;
          animation-delay: 5s;
}
.stars .star:nth-of-type(6) {
  left: 30%;
  top: 20%;
  -webkit-animation-delay: 1s;
          animation-delay: 1s;
}
.stars .star:nth-of-type(7) {
  left: 20%;
  top: 70%;
  -webkit-animation-delay: 2s;
          animation-delay: 2s;
}
.stars .star:nth-of-type(8) {
  left: 70%;
  top: 20%;
  -webkit-animation-delay: 3s;
          animation-delay: 3s;
}
.stars .star:nth-of-type(9) {
  left: 25%;
  top: 30%;
  -webkit-animation-delay: 4s;
          animation-delay: 4s;
}
.stars .star:nth-of-type(10) {
  left: 30%;
  top: 5%;
  -webkit-animation-delay: 5s;
          animation-delay: 5s;
}