.layer_black {
	position: absolute;
	width: 150px;
	height: 40px;
	background: #000;
	border: none;
	border-radius: 10px;
	display: flex;
	justify-content: center;
	align-items: center;
	color: #aaa;
	transition-duration: 0.25s;
}

.layer_black:hover {
	background: rgba(32, 32, 32, 0.5);
	color: #000;
	transition-duration: 0.25s;
}

.layer_colorful {
	position: absolute;
	width: 150px;
	height: 40px;
	border: none;
	border-radius: 10px;
	background: linear-gradient(
		45deg,
		#002bff,
		#7a00ff,
		#ff00c8,
		#7a00ff
	);
	background-size: 400% 400%;
	filter: blur(1px);
	-webkit-filter: blur(1px);
	animation: glowing_animation 60s linear infinite;
	user-select: none;
	-webkit-user-select: none;
}

.button_colorful {
	width: 150px;
	height: 40px;
	border: none;
	color: #fff;
}

.button_colorful:hover {
	color: #000;
}

.shadow_colorful {
	padding: 0.6em 2em;
	border: none;
	outline: none;
	z-index: 0;
	user-select: none;
	-webkit-user-select: none;
	touch-action: manipulation;
	position: absolute;
}

.shadow_colorful:before {
	content: "";
	background: linear-gradient(
		45deg,
		#002bff,
		#7a00ff,
		#ff00c8,
		#7a00ff
	);
	filter: blur(50px);
	-webkit-filter: blur(50px);
	animation: glowing_animation 60s linear infinite;
	background-size: 400%;
	z-index: -1;
	width: 150px;
	height: 40px;
	position: absolute;
	margin-left: -37px;
	left: 50%;
}

@keyframes glowing_animation {
  0% {
    background-position: 0 0;
  }
  50% {
    background-position: 400% 0;
  }
  100% {
    background-position: 0 0;
  }
}