原子加载器动画

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css

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html

css

* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 223;
	--bg: hsl(var(--hue),90%,10%);
	--fg: hsl(var(--hue),90%,90%);
	--primary: hsl(var(--hue),90%,50%);
	--trans-dur: 0.3s;
	font-size: calc(20px + (40 - 20) * (100vw - 320px) / (2560 - 320));
}
body {
	background-color: var(--bg);
	color: var(--fg);
	display: flex;
	font: 1em/1.5 sans-serif;
	height: 100vh;
	transition:
		background-color var(--trans-dur),
		color var(--trans-dur);
}
.pl {
	--dur: 3s;
	margin: auto;
	position: relative;
	width: 8em;
	height: 8em;
}
.pl__nucleus,
.pl__nucleus-particle {
	position: absolute;
}
.pl__nucleus {
	top: 50%;
	left: 50%;
	transform-style: preserve-3d;
}
.pl__nucleus-particle,
.pl__ring,
.pl__orbit,
.pl__electron {
	animation: particleTop var(--dur) linear infinite;
}
.pl__nucleus-particle {
	background-color: var(--primary);
	background-image: radial-gradient(37.5% 37.5% at 37.5% 37.5%,hsla(var(--hue),10%,90%,0.25) 48%,hsla(var(--hue),10%,90%,0) 50%);
	border-radius: 50%;
	box-shadow: -0.125em -0.125em 0 hsla(var(--hue),10%,10%,0.25) inset;
	top: calc(50% - 0.5em);
	left: calc(50% - 0.5em);
	width: 1em;
	height: 1em;
	transition: background-color var(--trans-dur);
}
.pl__nucleus-particle:nth-child(2n) {
	background-color: hsl(var(--hue),90%,70%);
}
.pl__nucleus-particle:nth-child(n + 4):nth-child(-n + 9) {
	animation-name: particleMiddle;
}
.pl__nucleus-particle:nth-child(n + 10):nth-child(-n + 12) {
	animation-name: particleBottom;
}
.pl__nucleus-particle:nth-child(2) { animation-delay: calc(var(--dur) * -0.33); }
.pl__nucleus-particle:nth-child(3) { animation-delay: calc(var(--dur) * -0.67); }
.pl__nucleus-particle:nth-child(5) { animation-delay: calc(var(--dur) * -0.17); }
.pl__nucleus-particle:nth-child(6) { animation-delay: calc(var(--dur) * -0.33); }
.pl__nucleus-particle:nth-child(7) { animation-delay: calc(var(--dur) * -0.5); }
.pl__nucleus-particle:nth-child(8) { animation-delay: calc(var(--dur) * -0.67); }
.pl__nucleus-particle:nth-child(9) { animation-delay: calc(var(--dur) * -0.83); }
.pl__nucleus-particle:nth-child(11) { animation-delay: calc(var(--dur) * -0.33); }
.pl__nucleus-particle:nth-child(12) { animation-delay: calc(var(--dur) * -0.67); }
.pl__nucleus-particle:last-child { animation: none; }

.pl__rings {
	display: block;
	width: 100%;
	height: auto;
}
.pl__ring {
	animation-name: ring;
	transform-origin: 64px 64px;
}
.pl__ring:nth-child(n + 5):nth-child(-n + 7) {
	animation-delay: calc(var(--dur) * -0.25);
}
.pl__orbit,
.pl__electron {
	animation-name: orbit;
	transition: stroke var(--trans-dur);
}
.pl__orbit:first-child {
	stroke: hsla(var(--hue),90%,50%,0);
}
.pl__orbit:nth-child(2) {
	stroke: hsla(var(--hue),90%,50%,0.5);
}
.pl__orbit:nth-child(3) {
	stroke: hsla(var(--hue),90%,50%,0.7);
}
.pl__ring:first-child .pl__orbit:first-child { stroke: hsla(var(--hue),90%,50%,0.3); }
.pl__ring:nth-child(2) .pl__orbit { animation-delay: calc(var(--dur) * -0.125); }
.pl__ring:nth-child(3) .pl__orbit { animation-delay: calc(var(--dur) * -0.25); }
.pl__ring:nth-child(4) .pl__orbit { animation-delay: calc(var(--dur) * -0.375); }
.pl__ring:nth-child(5) .pl__orbit:first-child { stroke: hsla(var(--hue),90%,50%,0.3); }
.pl__ring:nth-child(6) .pl__orbit { animation-delay: calc(var(--dur) * -0.25); }
.pl__ring:nth-child(7) .pl__electron:nth-child(2) { animation-delay: calc(var(--dur) * -0.25); }
.pl__ring:nth-child(8) .pl__electron:nth-child(2) { animation-delay: calc(var(--dur) * -0.125); }
.pl__ring:nth-child(8) .pl__electron:nth-child(3) { animation-delay: calc(var(--dur) * -0.25); }
.pl__ring:nth-child(8) .pl__electron:nth-child(4) { animation-delay: calc(var(--dur) * -0.375); }

/* Animations */
@keyframes orbit {
	from { stroke-dashoffset: 0; }
	to { stroke-dashoffset: 580; }
}
@keyframes ring {
	from { transform: rotate(0); }
	to { transform: rotate(1turn); }
}
@keyframes particleTop {
	from { transform: rotateY(0) rotateZ(-35deg) translateY(-100%) rotateZ(35deg) rotateY(0); }
	to { transform: rotateY(-1turn) rotateZ(-35deg) translateY(-100%) rotateZ(35deg) rotateY(1turn); }
}
@keyframes particleMiddle {
	from { transform: rotateY(0) rotateZ(90deg) translateY(-100%) rotateZ(-90deg) rotateY(0); }
	to { transform: rotateY(-1turn) rotateZ(90deg) translateY(-100%) rotateZ(-90deg) rotateY(1turn); }
}
@keyframes particleBottom {
	from { transform: rotateY(0) rotateZ(-145deg) translateY(-100%) rotateZ(145deg) rotateY(0); }
	to { transform: rotateY(-1turn) rotateZ(-145deg) translateY(-100%) rotateZ(145deg) rotateY(1turn); }
}

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