Разработка Эффект пламя при наведении на кнопку

a {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 50px;
  background: #fff;
  border-radius: 999px;
}
a:hover {
  -webkit-animation: burn 1000ms ease-out forwards;
          animation: burn 1000ms ease-out forwards;
}
a:hover::before {
  content: '';
  position: absolute;
  left: 40px;
  width: 100px;
  height: 40px;
  background: #ffe66e;
  border-radius: 100%;
  -webkit-animation: flare 1000ms ease-out forwards;
          animation: flare 1000ms ease-out forwards;
}
a:hover::after {
  content: '';
  position: absolute;
  right: 40px;
  width: 100px;
  height: 40px;
  background: #ffe66e;
  border-radius: 100%;
  -webkit-animation: flare 1000ms ease-out forwards;
          animation: flare 1000ms ease-out forwards;
}

@-webkit-keyframes flare {
  100% {
    -webkit-transform: translateY(-20px) scale(1.5);
            transform: translateY(-20px) scale(1.5);
    -webkit-filter: blur(10px);
            filter: blur(10px);
    opacity: 0;
  }
}

@keyframes flare {
  100% {
    -webkit-transform: translateY(-20px) scale(1.5);
            transform: translateY(-20px) scale(1.5);
    -webkit-filter: blur(10px);
            filter: blur(10px);
    opacity: 0;
  }
}
@-webkit-keyframes burn {
  0% {
    color: #ff826e;
    background: #ffe66e;
    box-shadow: 0 0 5px 0 #c8000a, 0 0 5px 0 rgba(230, 30, 10, 0.8), 0 0 5px 0 rgba(230, 230, 10, 0.6);
  }
  100% {
    color: black;
    background: white;
    box-shadow: 0 -35px 40px 30px rgba(255, 130, 10, 0), 0 -30px 30px 10px rgba(230, 30, 10, 0), 0 -20px 10px 0 rgba(255, 255, 10, 0);
  }
}
@keyframes burn {
  0% {
    color: #ff826e;
    background: #ffe66e;
    box-shadow: 0 0 5px 0 #c8000a, 0 0 5px 0 rgba(230, 30, 10, 0.8), 0 0 5px 0 rgba(230, 230, 10, 0.6);
  }
  100% {
    color: black;
    background: white;
    box-shadow: 0 -35px 40px 30px rgba(255, 130, 10, 0), 0 -30px 30px 10px rgba(230, 30, 10, 0), 0 -20px 10px 0 rgba(255, 255, 10, 0);
  }
}