Webleb - Extraits de Code - Animation de texte au défilement

HTML

CSS

body {
	display: grid;
	place-items: center;
	min-height: 200vh;
	background: hsl(0 0% 0%);
	color: hsl(0 0% 98%);
	font-family:  "SF Pro Text", "SF Pro Icons", "AOS Icons", "Helvetica Neue", Helvetica, Arial, sans-serif, system-ui;
}
::-webkit-scrollbar {
	background: transparent;
	width: 5px;
	height: 5px;
}

::-webkit-scrollbar-thumb {
	background-color: #3c3f58;
}

::-webkit-scrollbar-thumb:hover {
	background-color: rgba(0, 0, 0, 0.3);
}

section {
	position: fixed;
	top: 0;
	left: 50%;
	display: grid;
	justify-content: start;
	align-content: center;
	translate: -50% 0;
	height: 100vh;
	width: 600px;
	max-width: calc(100% - 4rem);
	gap: 1rem;
}

:is(p) {
	margin: 0;
	font-size: 1rem;
	font-weight: 400;
	font-size: clamp(1rem, 0.75vw + 1rem, 1.25rem);
}
:is(p:nth-of-type(2), a) {
	opacity: 0;
	animation: fade-in both linear;
	animation-timeline: scroll(root);
	animation-range: 75vh 90vh;
}

p:nth-of-type(2) {
	--opacity: 0.65;
}
@keyframes fade-in {
	to {
		opacity: var(--opacity, 1);
	}
}

p:nth-of-type(1) {
	font-size: clamp(1rem, 3vw + 1rem, 2rem);
	font-weight: 600;
  background: #1FA2FF;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #A6FFCB, #12D8FA, #1FA2FF);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #A6FFCB, #12D8FA, #1FA2FF); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
	-webkit-background-clip: text;
	background-position: 50% 0;
	color: transparent;
  opacity: 0;
	animation: move-bg both linear, fade-in both linear;
	animation-timeline: scroll(root);
	animation-range: 0 100vh, 40vh 100vh;
}

JS