Realistic Liquid Button | Learning Axis

HTML

CSS

body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #0d0d0d;
  font-family: "Poppins", sans-serif;
}
.liquid-btn {
  position: relative;
  padding: 18px 50px;
  font-size: 22px;
  color: #fff;
  border: none;
  cursor: pointer;
  border-radius: 50px;
  overflow: hidden;
  text-transform: uppercase;
  font-weight: bold;
  letter-spacing: 2px;
  background: linear-gradient(135deg, red, blue);
  box-shadow: 0 0 20px rgba(79, 172, 254, 0.8), 0 0 40px rgba(0, 242, 254, 0.6);
  transition: transform 0.2s ease;
}
.liquid-btn:hover {
  transform: scale(1.05);
}
.liquid-btn::before,
.liquid-btn::after {
  content: "";
  position: absolute;
  left: -50%;
  width: 200%;
  height: 300%;
  background: radial-gradient(circle, rgba(255,255,255,0.25) 20%, transparent 70%);
  animation: wave 6s linear infinite;
  border-radius: 40%;
  z-index: 1;
}
.liquid-btn::after {
  animation-duration: 8s;
  opacity: 0.6;
}
.shine {
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, rgba(255,255,255,0.3) 0%, transparent 60%);
  transform: skewX(-25deg);
  animation: shineMove 4s infinite;
  z-index: 2;
}
@keyframes wave {
  0% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-10%) rotate(180deg);
  }
  100% {
    transform: translateY(0) rotate(360deg);
  }
}
@keyframes shineMove {
  0% {
    left: -75%;
  }
  100% {
    left: 125%;
  }
}