A 3D yes: the box tips its face down and back up twice, pivoting low like a head on a neck. Pair it with Head Shake for yes and no feedback. Uses rotateX inside perspective().
Also known as: nod animation css, yes nod animation, nodding effect.
<div class="kfa-head-nod">Yes</div>
.kfa-head-nod {
--c: var(--kfa-color, #3b82f6);
font-size: var(--kfa-size, 16px);
display: grid;
place-items: center;
width: 5.5em;
height: 5.5em;
border-radius: 1em;
background: var(--c);
color: #fff;
font-family: system-ui, sans-serif;
font-weight: 700;
box-shadow: 0 0.6em 1.4em -0.6em color-mix(in srgb, var(--c) 70%, transparent);
transform-origin: 50% 85%;
animation: kfa-head-nod-yes 1s ease-in-out both;
}
@keyframes kfa-head-nod-yes {
0%, 86%, 100% { transform: perspective(14em) translateY(0) rotateX(0); }
14% { transform: perspective(14em) translateY(0.22em) rotateX(-30deg); }
32% { transform: perspective(14em) translateY(-0.06em) rotateX(8deg); }
50% { transform: perspective(14em) translateY(0.16em) rotateX(-22deg); }
68% { transform: perspective(14em) translateY(0) rotateX(4deg); }
}
@media (prefers-reduced-motion: reduce) {
.kfa-head-nod, .kfa-head-nod *, .kfa-head-nod::before, .kfa-head-nod::after, .kfa-head-nod *::before, .kfa-head-nod *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}--kfa-color on the element or a parent.
Currently previewing #3b82f6.--kfa-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 16px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.