.parent {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.child {
  width: 50px;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  transform-style: preserve-3d;
  transition: all 0.3s cubic-bezier(0.68, 0.85, 0.265, 1.85);
  border-radius: 5px;
  margin: 0 5px;
  box-shadow:
    inset 1px 1px 2px #fff,
    0 0 5px #4442;
}

.child:hover {
  background-color: white;
  background-position: -100px 100px, -100px 100px;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.child-1:hover {
  box-shadow: 0px 10px 10px #1e90ff;
}
.child-2:hover {
  box-shadow: 0px 10px 10px #ff00ff;
}
.child-3:hover {
  box-shadow: 0px 10px 10px #0a0a0a;
}
.child-4:hover {
  box-shadow: 0px 10px 10px #4267b2;
}

.button {
  cursor: pointer;
  width: 100%;
  height: 100%;
  border: none;
  background-color: transparent;
  font-size: 20px;
  transition-duration: 0.5s;
  transition-timing-function: cubic-bezier(0.68, -0.85, 0.265, 1.55);
}

.child:hover > .button {
  transform: translateY(0);
}

/* for back to top button */

.button-t {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgb(20, 20, 20);
  border: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0px 0px 0px 4px rgba(180, 160, 255, 0.253);
  cursor: pointer;
  transition-duration: 0.3s;
  overflow: hidden;
  position: relative;
}

.svgIcon {
  width: 12px;
  transition-duration: 0.3s;
}

.svgIcon path {
  fill: white;
}

.button-t:hover {
  width: 140px;
  border-radius: 50px;
  transition-duration: 0.3s;
  background-color: rgb(181, 160, 255);
  align-items: center;
  transform: translateY(-2px);
}

.button-t:hover .svgIcon {
  /* width: 20px; */
  transition-duration: 0.3s;
  transform: translateY(-200%);
}

.button-t::before {
  position: absolute;
  bottom: -20px;
  content: "Back to Top";
  color: white;
  /* transition-duration: .3s; */
  font-size: 0px;
}

.button-t:hover::before {
  font-size: 13px;
  opacity: 1;
  bottom: unset;
  /* transform: translateY(-30px); */
  transition-duration: 0.3s;
}

/* for contact us button */

.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: .3s;
}

.sparkle-button:active {
  transform: translateY(0);
  box-shadow: none;
  transition: .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%;
}

.sparkle-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}