Glow Pulse
Selecting a radio fires a soft expanding halo that radiates outward from the dot — pure CSS, animation runs once per selection via a keyframed box-shadow ripple.
Glow Pulse the 18th of 18 designs in the 18 CSS Radio Button Designs collection. The design is implemented in pure CSS — no JavaScript required. Copy the HTML and CSS panels below into your project. Because the demo is pure CSS, it works in any framework or templating engine you happen to use. The design honours prefers-reduced-motion and uses real semantic markup, so it ships accessibility-ready out of the box.
Live preview
The code
<fieldset class="crb-glow"> <legend class="crb-sr">Reaction</legend> <label><input type="radio" name="crb-glow" /><span></span>Like</label> <label><input type="radio" name="crb-glow" /><span></span>Love</label> <label><input type="radio" name="crb-glow" /><span></span>Celebrate</label> </fieldset>
.crb-glow { display: flex; flex-direction: column; gap: 10px; border: 0; padding: 0; }
.crb-glow label {
display: flex; align-items: center; gap: 10px;
font: 500 13px/1 system-ui, sans-serif; color: #cbd5e1; cursor: pointer;
}
.crb-glow input { appearance: none; -webkit-appearance: none; position: absolute; opacity: 0; }
.crb-glow span {
width: 18px; height: 18px; border-radius: 50%;
border: 2px solid #444461; background: transparent;
position: relative;
transition: border-color 0.2s, background 0.25s;
}
.crb-glow span::after {
content: ''; position: absolute; inset: -2px;
border-radius: 50%;
box-shadow: 0 0 0 0 rgba(255,108,138,0.7);
pointer-events: none;
}
.crb-glow input:checked + span {
background: linear-gradient(135deg, #ff6c8a, #a78bfa);
border-color: transparent;
}
.crb-glow input:checked + span::after {
animation: crb-glow-ripple 0.9s ease-out;
}
@keyframes crb-glow-ripple {
0% { box-shadow: 0 0 0 0 rgba(255,108,138,0.7), 0 0 0 0 rgba(167,139,250,0.5); }
60% { box-shadow: 0 0 0 14px rgba(255,108,138,0), 0 0 0 22px rgba(167,139,250,0); }
100% { box-shadow: 0 0 0 14px rgba(255,108,138,0), 0 0 0 22px rgba(167,139,250,0); }
}
@media (prefers-reduced-motion: reduce) {
.crb-glow,
.crb-glow * {
animation: none !important;
}
}
.crb-sr {
position: absolute !important;
width: 1px;
height: 1px;
padding: 0;
margin: -1px;
overflow: hidden;
clip: rect(0, 0, 0, 0);
white-space: nowrap;
border: 0;
}