@-webkit-keyframes glow {
  0% {
    box-shadow: 0 0 0 0 #FEC504;
  }
  50% {
    box-shadow: 0 0 100px 0 #FEC504;
  }
  100% {
    box-shadow: 0 0 120px 0 #dc143c;
  }
}

@keyframes glow {
  0% {
    box-shadow: 0 0 0 0 #FEC504;
  }
  50% {
    box-shadow: 0 0 100px 0 #FEC504;
  }
  100% {
    box-shadow: 0 0 120px 0 #dc143c;
  }
}
.btn_anim {
  background: none;
  color: inherit;
  font: inherit;
  border: none;
  border-radius: 15px;
  outline: none;
  cursor: pointer;
}

.btn_anim-glow {
    
    background-color : #ea1903;
    color: white;
    padding: 12px 90px;
    border-radius: 15px;
    border-color: #d21602;
    font-size: 22px;
    font-family:times;
    color: #fff;
    font-weight: 600;
    text-transform: uppercase;
    box-shadow: 0 0 0 0 #FEC504;
    -webkit-animation: glow 1.4s linear infinite;
          animation: glow 1.4s linear infinite;
}