Traffic Light Checkbox

<!--
  Author: @emma-lake
  License: MIT
  Tags: #buttons #css #interface #opensource #codepeek
-->
<label class="traffic-check">
  <input type="checkbox" class="traffic-check__input" />
  <span class="traffic-check__column">
    <span class="traffic-check__lamp traffic-check__lamp--red"></span>
    <span class="traffic-check__lamp traffic-check__lamp--green"></span>
  </span>
  <span class="traffic-check__label">Go live</span>
</label>

/*
 * Author: @emma-lake
 * License: MIT
 * Tags: #buttons #css #interface #opensource #codepeek
 */

.traffic-check {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
  font-family: system-ui, sans-serif;
  color: #9a9aa5;
  font-size: 15px;
}
.traffic-check__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.traffic-check__column {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  border-radius: 8px;
  background: #17171d;
  border: 1px solid #2a2a33;
}
.traffic-check__lamp {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #2a2a33;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.traffic-check__lamp--red {
  background: #ef4444;
  animation: lamp-live-glow 1.8s ease-in-out infinite;
}
@keyframes lamp-live-glow {
  0%, 100% { box-shadow: 0 0 8px 1px rgba(239, 68, 68, 0.5); }
  50% { box-shadow: 0 0 14px 3px rgba(239, 68, 68, 0.8); }
}
.traffic-check__input:checked ~ .traffic-check__column .traffic-check__lamp--red {
  background: #3a1414;
  box-shadow: none;
  animation: none;
}
.traffic-check__input:checked ~ .traffic-check__column .traffic-check__lamp--green {
  background: #22c55e;
  animation: lamp-live-glow-green 1.8s ease-in-out infinite;
}
@keyframes lamp-live-glow-green {
  0%, 100% { box-shadow: 0 0 8px 1px rgba(34, 197, 94, 0.5); }
  50% { box-shadow: 0 0 14px 3px rgba(34, 197, 94, 0.8); }
}
.traffic-check__input:checked ~ .traffic-check__label {
  color: #f4f4f5;
}