Acid Tags
Multi-select chips with an acid-green glow halo that radiates outward when checked. Each chip carries a unique pulse phase so the row feels alive without being noisy.
Acid Tags the 3rd of 22 designs in the 22 CSS Button Group 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="cbgp-acid" role="group" aria-label="Filters"> <legend class="cbgp-sr">Filters</legend> <label><input type="checkbox" checked /><span style="--ph: 0">CSS</span></label> <label><input type="checkbox" /><span style="--ph: 1">React</span></label> <label><input type="checkbox" checked /><span style="--ph: 2">TypeScript</span></label> <label><input type="checkbox" /><span style="--ph: 3">Astro</span></label> </fieldset>
.cbgp-acid {
display: inline-flex; flex-wrap: wrap; gap: 8px;
border: 0; padding: 0; margin: 0;
}
.cbgp-acid input { appearance: none; -webkit-appearance: none; position: absolute; opacity: 0; }
.cbgp-acid label { display: inline-block; cursor: pointer; }
.cbgp-acid span {
display: inline-block;
padding: 7px 14px;
background: rgba(8,10,18,0.85);
border: 1px solid rgba(168,255,184,0.2);
border-radius: 999px;
color: rgba(220,225,230,0.6);
font: 600 11px/1 ui-monospace, monospace;
letter-spacing: 0.06em;
position: relative;
transition: background 0.25s, border-color 0.25s, color 0.25s, box-shadow 0.4s;
}
.cbgp-acid label:hover span { color: rgba(220,225,230,0.9); border-color: rgba(168,255,184,0.4); }
.cbgp-acid input:checked + span {
background: rgba(60,200,90,0.12);
border-color: #3eff7f;
color: #c8ffd6;
box-shadow:
0 0 0 3px rgba(62,255,127,0.08),
0 0 18px rgba(62,255,127,0.35);
}
.cbgp-acid input:focus-visible + span { outline: 2px solid #3eff7f; outline-offset: 2px; }