@import url(https://fonts.googleapis.com/css2?family=Roboto&display=swap);

* {
  margin: 0;
  padding: 0;
  font-family: "Roboto", sans-serif;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  flex-direction: column;
  background: #040d15;
}

a.ripple {
  position: relative;
  display: inline-block;
  padding: 12px 36px;
  margin: 10px 0;
  color: #fff;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 18px;
  letter-spacing: 2px;
  border-radius: 40px;
  overflow: hidden;
  background: linear-gradient(90deg, #0162c8, #55e7fc);
}

a.ripple:nth-child(2) {
  background: linear-gradient(90deg, #755bea, #ff72c0);
}

a.ripple:nth-child(3) {
  background: linear-gradient(90deg, #536976, #292e49);
}

a.ripple:nth-child(4) {
  background: linear-gradient(90deg, #373b44, #4286f4);
}

a.ripple > span {
  position: absolute;
  background: #fff;
  transform: translate(-50%, -50%);
  pointer-events: none;
  border-radius: 50%;
  animation: ripples 0.6s linear infinite;
}

@keyframes ripples {
  0% {
    width: 0px;
    height: 0px;
    opacity: 0.5;
  }
  100% {
    width: 500px;
    height: 500px;
    opacity: 0;
  }
}