.wave-icon {
  font-size: 48px; text-align: center; margin-bottom: var(--p1);
  animation: wave 1.5s ease-in-out infinite;
  transform-origin: 70% 70%;
  display: inline-block;
}
@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  20%       { transform: rotate(20deg); }
  40%       { transform: rotate(-10deg); }
  60%       { transform: rotate(15deg); }
}