Gradient Border
Conic gradient border traces around the selected option — creates a slowly rotating rainbow ring on focus.
Gradient Border the 14th 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-grad">
<legend class="crb-sr">Tier</legend>
<label><input type="radio" name="crb-grad" /><span class="crb-grad-card">Bronze</span></label>
<label><input type="radio" name="crb-grad" /><span class="crb-grad-card">Silver</span></label>
<label
><input type="radio" name="crb-grad" checked /><span class="crb-grad-card">Gold</span></label
>
</fieldset> .crb-grad { display: flex; gap: 8px; border: 0; padding: 0; }
.crb-grad input { appearance: none; -webkit-appearance: none; position: absolute; opacity: 0; }
.crb-grad label { cursor: pointer; }
.crb-grad-card {
display: block; padding: 10px 18px;
background: #1a1a28; border-radius: 8px;
font: 600 12px/1 system-ui, sans-serif; color: #b8b6d4;
position: relative; isolation: isolate;
transition: color 0.25s;
}
.crb-grad-card::before {
content: ''; position: absolute; inset: -2px; border-radius: 10px;
background: conic-gradient(from 0deg, #7c6cff, #ff6c8a, #f5a623, #2ecc8a, #06b6d4, #7c6cff);
z-index: -1; opacity: 0;
animation: crb-grad-spin 4s linear infinite;
transition: opacity 0.3s;
}
.crb-grad-card::after {
content: ''; position: absolute; inset: 0; border-radius: 8px;
background: #1a1a28; z-index: -1;
}
.crb-grad input:checked + .crb-grad-card { color: #fff; }
.crb-grad input:checked + .crb-grad-card::before { opacity: 1; }
@keyframes crb-grad-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
.crb-grad,
.crb-grad * {
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;
}