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        d="M6.937 3.846L7.75 1L8.563 3.846C8.77313 4.58114 9.1671 5.25062 9.70774 5.79126C10.2484 6.3319 10.9179 6.72587 11.653 6.936L14.5 7.75L11.654 8.563C10.9189 8.77313 10.2494 9.1671 9.70874 9.70774C9.1681 10.2484 8.77413 10.9179 8.564 11.653L7.75 14.5L6.937 11.654C6.72687 10.9189 6.3329 10.2494 5.79226 9.70874C5.25162 9.1681 4.58214 8.77413 3.847 8.564L1 7.75L3.846 6.937C4.58114 6.72687 5.25062 6.3329 5.79126 5.79226C6.3319 5.25162 6.72587 4.58214 6.936 3.847L6.937 3.846Z"
      ></path>
    </svg>
  </span>
</div>

CSS

.sparkle-button {
  --active: 0;
  --bg: radial-gradient(
      40% 50% at center 100%,
      hsl(270 calc(var(--active) * 97%) 72% / var(--active)),
      transparent
    ),
    radial-gradient(
      80% 100% at center 120%,
      hsl(260 calc(var(--active) * 97%) 70% / var(--active)),
      transparent
    ),
    hsl(260 calc(var(--active) * 97%) calc((var(--active) * 44%) + 12%));
  background: var(--bg);
  font-size: 1.2rem;
  font-weight: 500;
  border: 0;
  cursor: pointer;
  padding: 1em 1em;
  display: flex;
  align-items: center;
  gap: 0.25em;
  white-space: nowrap;
  border-radius: 100px;
  position: relative;
  box-shadow:
    0 0 calc(var(--active) * 3em) calc(var(--active) * 1em)
      hsl(260 97% 61% / 0.75),
    0 0em 0 0
      hsl(260 calc(var(--active) * 97%) calc((var(--active) * 50%) + 30%)) inset,
    0 -0.05em 0 0 hsl(260 calc(var(--active) * 97%) calc(var(--active) * 60%)) inset;
  transition:
    box-shadow var(--transition),
    scale var(--transition),
    background var(--transition);
  scale: calc(1 + (var(--active) * 0.1));
  transition: 0.3s;
}

.sparkle-button:active {
  scale: 1;
  transition: 0.3s;
}

.sparkle path {
  color: hsl(0 0% calc((var(--active, 0) * 70%) + var(--base)));
  transform-box: fill-box;
  transform-origin: center;
  fill: currentColor;
  stroke: currentColor;
  animation-delay: calc((var(--transition) * 1.5) + (var(--delay) * 1s));
  animation-duration: 0.6s;
  transition: color var(--transition);
}

.sparkle-button:is(:hover, :focus-visible) path {
  animation-name: bounce;
}

@keyframes bounce {
  35%,
  65% {
    scale: var(--scale);
  }
}

.sparkle path:nth-of-type(1) {
  --scale: 0.5;
  --delay: 0.1;
  --base: 40%;
}

.sparkle path:nth-of-type(2) {
  --scale: 1.5;
  --delay: 0.2;
  --base: 20%;
}

.sparkle path:nth-of-type(3) {
  --scale: 2.5;
  --delay: 0.35;
  --base: 30%;
}

.sparkle-button:before {
  content: "";
  position: absolute;
  inset: -0.2em;
  z-index: -1;
  border: 0.25em solid hsl(260 97% 50% / 0.5);
  border-radius: 100px;
  opacity: var(--active, 0);
  transition: opacity var(--transition);
}

.spark {
  position: absolute;
  inset: 0;
  border-radius: 100px;
  rotate: 0deg;
  overflow: hidden;
  mask: linear-gradient(white, transparent 50%);
  animation: flip calc(var(--spark) * 2) infinite steps(2, end);
}

@keyframes flip {
  to {
    rotate: 360deg;
  }
}

.spark:before {
  content: "";
  position: absolute;
  width: 200%;
  aspect-ratio: 1;
  top: 0%;
  left: 50%;
  z-index: -1;
  translate: -50% -15%;
  rotate: 0;
  transform: rotate(-90deg);
  opacity: calc((var(--active)) + 0.4);
  background: conic-gradient(from 0deg, transparent 0 340deg, white 360deg);
  transition: opacity var(--transition);
  animation: rotate var(--spark) linear infinite both;
}

.spark:after {
  content: "";
  position: absolute;
  inset: var(--cut);
  border-radius: 100px;
}

.backdrop {
  position: absolute;
  inset: var(--cut);
  background: var(--bg);
  border-radius: 100px;
  transition: background var(--transition);
}

@keyframes rotate {
  to {
    transform: rotate(90deg);
  }
}

@supports (selector(:has(:is(+ *)))) {
  body:has(button:is(:hover, :focus-visible)) {
    --active: 1;
    --play-state: running;
  }

.bodydrop {
    display: none;
  }
}

.sparkle-button:is(:hover, :focus-visible) ~ :is(.bodydrop, .particle-pen) {
  --active: 1;
  --play-state: runnin;
}

.sparkle-button:is(:hover, :focus-visible) {
  --active: 1;
  --play-state: running;
}

.sp {
  position: relative;
}

.particle-pen {
  position: absolute;
  width: 200%;
  aspect-ratio: 1;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  -webkit-mask: radial-gradient(white, transparent 65%);
  z-index: -1;
  opacity: var(--active, 0);
  transition: opacity var(--transition);
}

.particle {
  fill: white;
  width: calc(var(--size, 0.25) * 1rem);
  aspect-ratio: 1;
  position: absolute;
  top: calc(var(--y) * 1%);
  left: calc(var(--x) * 1%);
  opacity: var(--alpha, 1);
  animation: float-out calc(var(--duration, 1) * 1s) calc(var(--delay) * -1s)
    infinite linear;
  transform-origin: var(--origin-x, 1000%) var(--origin-y, 1000%);
  z-index: -1;
  animation-play-state: var(--play-state, paused);
}

.particle path {
  fill: hsl(0 0% 90%);
  stroke: none;
}

.particle:nth-of-type(even) {
  animation-direction: reverse;
}

@keyframes float-out {
  to {
    rotate: 360deg;
  }
}

.text {
  translate: 2% -6%;
  letter-spacing: 0.01ch;
  background: linear-gradient(
    90deg,
    hsl(0 0% calc((var(--active) * 100%) + 65%)),
    hsl(0 0% calc((var(--active) * 100%) + 26%))
  );
  -webkit-background-clip: text;
  color: transparent;
  transition: background var(--transition);
}

.sparkle-button svg {
  inline-size: 1.25em;
  translate: -25% -5%;
}

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