body{
    margin: 0;
    padding: 0;
    display: grid;
    place-items: center;
}
.wave{
    font-size: 1.5em;
    font-family: "Comic Sans MS", "Comic Sans", cursive;
}
.wave .char{
    animation: anim 1s ease-in-out infinite;
    transform: translateY(-0.35em);
    animation-delay: calc(0.05s * var(--char-index));
}
@keyframes anim{
    0%, 100%{
        transform: translateY(-0.35em) rotate(0deg);
    }
    50%{
        transform: translateY(0.35em) rotate(0deg);
    }
}