Liquid Glass Button

<button class="liquid-btn">Click me</button>

.liquid-btn {
  position: relative;
  padding: 14px 32px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 9999px;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  font: 500 14px/1 system-ui, sans-serif;
  cursor: pointer;
  transition: background .3s ease, transform .15s ease;
  box-shadow: inset 0 1px 1px rgba(255,255,255,0.1);
}
.liquid-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.25);
}
.liquid-btn:active { transform: scale(0.96); }