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.neon-checkbox {
  --primary: #00ffaa;
  --primary-dark: #00cc88;
  --primary-light: #88ffdd;
  --size: 30px;
  position: relative;
  width: var(--size);
  height: var(--size);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.neon-checkbox input {
  display: none;
}

.neon-checkbox__frame {
  position: relative;
  width: 100%;
  height: 100%;
}

.neon-checkbox__box {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 4px;
  border: 2px solid var(--primary-dark);
  transition: all 0.4s ease;
}

.neon-checkbox__check-container {
  position: absolute;
  inset: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.neon-checkbox__check {
  width: 80%;
  height: 80%;
  fill: none;
  stroke: var(--primary);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 40;
  stroke-dashoffset: 40;
  transform-origin: center;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.neon-checkbox__glow {
  position: absolute;
  inset: -2px;
  border-radius: 6px;
  background: var(--primary);
  opacity: 0;
  filter: blur(8px);
  transform: scale(1.2);
  transition: all 0.4s ease;
}

.neon-checkbox__borders {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  overflow: hidden;
}

.neon-checkbox__borders span {
  position: absolute;
  width: 40px;
  height: 1px;
  background: var(--primary);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.neon-checkbox__borders span:nth-child(1) {
  top: 0;
  left: -100%;
  animation: borderFlow1 2s linear infinite;
}

.neon-checkbox__borders span:nth-child(2) {
  top: -100%;
  right: 0;
  width: 1px;
  height: 40px;
  animation: borderFlow2 2s linear infinite;
}

.neon-checkbox__borders span:nth-child(3) {
  bottom: 0;
  right: -100%;
  animation: borderFlow3 2s linear infinite;
}

.neon-checkbox__borders span:nth-child(4) {
  bottom: -100%;
  left: 0;
  width: 1px;
  height: 40px;
  animation: borderFlow4 2s linear infinite;
}

.neon-checkbox__particles span {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  top: 50%;
  left: 50%;
  box-shadow: 0 0 6px var(--primary);
}

.neon-checkbox__rings {
  position: absolute;
  inset: -20px;
  pointer-events: none;
}

.neon-checkbox__rings .ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--primary);
  opacity: 0;
  transform: scale(0);
}

.neon-checkbox__sparks span {
  position: absolute;
  width: 20px;
  height: 1px;
  background: linear-gradient(90deg, var(--primary), transparent);
  opacity: 0;
}

/* Hover Effects */
.neon-checkbox:hover .neon-checkbox__box {
  border-color: var(--primary);
  transform: scale(1.05);
}

/* Checked State */
.neon-checkbox input:checked ~ .neon-checkbox__frame .neon-checkbox__box {
  border-color: var(--primary);
  background: rgba(0, 255, 170, 0.1);
}

.neon-checkbox input:checked ~ .neon-checkbox__frame .neon-checkbox__check {
  stroke-dashoffset: 0;
  transform: scale(1.1);
}

.neon-checkbox input:checked ~ .neon-checkbox__frame .neon-checkbox__glow {
  opacity: 0.2;
}

.neon-checkbox
  input:checked
  ~ .neon-checkbox__frame
  .neon-checkbox__borders
  span {
  opacity: 1;
}

/* Particle Animations */
.neon-checkbox
  input:checked
  ~ .neon-checkbox__frame
  .neon-checkbox__particles
  span {
  animation: particleExplosion 0.6s ease-out forwards;
}

.neon-checkbox
  input:checked
  ~ .neon-checkbox__frame
  .neon-checkbox__rings
  .ring {
  animation: ringPulse 0.6s ease-out forwards;
}

.neon-checkbox
  input:checked
  ~ .neon-checkbox__frame
  .neon-checkbox__sparks
  span {
  animation: sparkFlash 0.6s ease-out forwards;
}

/* Animations */
@keyframes borderFlow1 {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(200%);
  }
}

@keyframes borderFlow2 {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(200%);
  }
}

@keyframes borderFlow3 {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-200%);
  }
}

@keyframes borderFlow4 {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-200%);
  }
}

@keyframes particleExplosion {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  100% {
    transform: translate(
        calc(-50% + var(--x, 20px)),
        calc(-50% + var(--y, 20px))
      )
      scale(0);
    opacity: 0;
  }
}

@keyframes ringPulse {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes sparkFlash {
  0% {
    transform: rotate(var(--r, 0deg)) translateX(0) scale(1);
    opacity: 1;
  }
  100% {
    transform: rotate(var(--r, 0deg)) translateX(30px) scale(0);
    opacity: 0;
  }
}

/* Particle Positions */
.neon-checkbox__particles span:nth-child(1) {
  --x: 25px;
  --y: -25px;
}
.neon-checkbox__particles span:nth-child(2) {
  --x: -25px;
  --y: -25px;
}
.neon-checkbox__particles span:nth-child(3) {
  --x: 25px;
  --y: 25px;
}
.neon-checkbox__particles span:nth-child(4) {
  --x: -25px;
  --y: 25px;
}
.neon-checkbox__particles span:nth-child(5) {
  --x: 35px;
  --y: 0px;
}
.neon-checkbox__particles span:nth-child(6) {
  --x: -35px;
  --y: 0px;
}
.neon-checkbox__particles span:nth-child(7) {
  --x: 0px;
  --y: 35px;
}
.neon-checkbox__particles span:nth-child(8) {
  --x: 0px;
  --y: -35px;
}
.neon-checkbox__particles span:nth-child(9) {
  --x: 20px;
  --y: -30px;
}
.neon-checkbox__particles span:nth-child(10) {
  --x: -20px;
  --y: 30px;
}
.neon-checkbox__particles span:nth-child(11) {
  --x: 30px;
  --y: 20px;
}
.neon-checkbox__particles span:nth-child(12) {
  --x: -30px;
  --y: -20px;
}

/* Spark Rotations */
.neon-checkbox__sparks span:nth-child(1) {
  --r: 0deg;
  top: 50%;
  left: 50%;
}
.neon-checkbox__sparks span:nth-child(2) {
  --r: 90deg;
  top: 50%;
  left: 50%;
}
.neon-checkbox__sparks span:nth-child(3) {
  --r: 180deg;
  top: 50%;
  left: 50%;
}
.neon-checkbox__sparks span:nth-child(4) {
  --r: 270deg;
  top: 50%;
  left: 50%;
}

/* Ring Delays */
.neon-checkbox__rings .ring:nth-child(1) {
  animation-delay: 0s;
}
.neon-checkbox__rings .ring:nth-child(2) {
  animation-delay: 0.1s;
}
.neon-checkbox__rings .ring:nth-child(3) {
  animation-delay: 0.2s;
}

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