Stamp Press Checkbox

<!--
  Author: @emma-lake
  License: MIT
  Tags: #buttons #css #interface #opensource #codepeek
-->
<label class="stamp-check">
  <input type="checkbox" class="stamp-check__input" />
  <span class="stamp-check__box">
    <span class="stamp-check__ink">&#10003;</span>
  </span>
  <span class="stamp-check__label">Approve request</span>
</label>

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

.stamp-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;
}
.stamp-check__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.stamp-check__box {
  position: relative;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: #17171d;
  border: 2px solid #3a3a44;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, border-color 0.3s ease;
  animation: stamp-idle-pulse 2.6s ease-in-out infinite;
}
@keyframes stamp-idle-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
  50% { box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08); }
}
.stamp-check__ink {
  color: #ef4444;
  font-size: 18px;
  font-weight: 900;
  opacity: 0;
  transform: scale(2) rotate(-15deg);
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.stamp-check__input:active ~ .stamp-check__box {
  transform: scaleY(0.8);
}
.stamp-check__input:checked ~ .stamp-check__box {
  border-color: #ef4444;
  animation: stamp-checked-glow 2s ease-in-out infinite;
}
@keyframes stamp-checked-glow {
  0%, 100% { box-shadow: 0 0 6px 0 rgba(239, 68, 68, 0.3); }
  50% { box-shadow: 0 0 12px 2px rgba(239, 68, 68, 0.55); }
}
.stamp-check__input:checked ~ .stamp-check__box .stamp-check__ink {
  opacity: 1;
  transform: scale(1) rotate(-8deg);
}
.stamp-check__input:checked ~ .stamp-check__label {
  color: #f4f4f5;
}