.knopka24 .btn{
  min-width: 200px;
  min-height: 60px;
background: linear-gradient(146.74deg, #C2D6FB 3.08%, #F5CDFF 95.34%);
  border: 1px solid #882aed;
  border-radius: 1000px;
  box-shadow: 12px 12px 24px #dec0fe;
  transition: all 0.3s ease-in-out 0s;
  cursor: pointer;
  outline: none;
  position: relative;
  padding: 25px;
  }

.knopka24 .btn { 
     font-family: 'Nunito', sans-serif;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.3px;
  font-weight: 700;
  color: black !important;
}

.knopka24 .btn::before {
content: '';
  border-radius: 1000px;
  min-width: calc(300px + 12px);
  min-height: calc(60px + 12px);
  border: 6px solid #00FFCB;
  box-shadow: 0 0 60px rgba(0,255,203,.64);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: all .3s ease-in-out 0s;
}

.knopka24 .btn:hover, .new .btn:focus {
  color: #313133;
    transform: translateY(-6px);
}


.knopka24 .btn::after {
  content: '';
  width: 30px; height: 30px;
  border-radius: 100%;
  border: 6px solid #882aed;
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: ring 1.5s infinite;
}


@keyframes ring {
  0% {
    width: 30px;
    height: 30px;
    opacity: 1;
  }
  100% {
    width: 300px;
    height: 300px;
    opacity: 0;
  }
}