local and global graph

This commit is contained in:
Jacky Zhao 2023-06-18 10:47:07 -07:00
parent 8bfee04c8c
commit c4cf0dcb02
23 changed files with 1288 additions and 110 deletions

View file

@ -4,10 +4,15 @@ function ArticleTitle({ fileData }: QuartzComponentProps) {
const title = fileData.frontmatter?.title
const displayTitle = fileData.slug === "index" ? undefined : title
if (displayTitle) {
return <h1>{displayTitle}</h1>
return <h1 class="article-title">{displayTitle}</h1>
} else {
return null
}
}
ArticleTitle.css = `
.article-title {
margin: 2rem 0 0 0;
}
`
export default (() => ArticleTitle) satisfies QuartzComponentConstructor

View file

@ -0,0 +1,81 @@
import { QuartzComponentConstructor } from "./types"
// @ts-ignore
import script from "./scripts/graph.inline"
import style from "./styles/graph.scss"
export interface D3Config {
drag: boolean,
zoom: boolean,
depth: number,
scale: number,
repelForce: number,
centerForce: number,
linkDistance: number,
fontSize: number,
opacityScale: number
}
interface GraphOptions {
localGraph: Partial<D3Config>,
globalGraph: Partial<D3Config> | undefined
}
const defaultOptions: GraphOptions = {
localGraph: {
drag: true,
zoom: true,
depth: 1,
scale: 1.2,
repelForce: 2,
centerForce: 1,
linkDistance: 30,
fontSize: 0.6,
opacityScale: 3
},
globalGraph: {
drag: true,
zoom: true,
depth: -1,
scale: 1.2,
repelForce: 1,
centerForce: 1,
linkDistance: 30,
fontSize: 0.5,
opacityScale: 3
}
}
export default ((opts?: GraphOptions) => {
function Graph() {
const localGraph = { ...opts?.localGraph, ...defaultOptions.localGraph }
const globalGraph = { ...opts?.globalGraph, ...defaultOptions.globalGraph }
return <div class="graph">
<h3>Interactive Graph</h3>
<div class="graph-outer">
<div id="graph-container" data-cfg={JSON.stringify(localGraph)}></div>
<svg version="1.1" id="global-graph-icon" xmlns="http://www.w3.org/2000/svg" xmlnsXlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
viewBox="0 0 55 55" fill="currentColor" xmlSpace="preserve">
<path d="M49,0c-3.309,0-6,2.691-6,6c0,1.035,0.263,2.009,0.726,2.86l-9.829,9.829C32.542,17.634,30.846,17,29,17
s-3.542,0.634-4.898,1.688l-7.669-7.669C16.785,10.424,17,9.74,17,9c0-2.206-1.794-4-4-4S9,6.794,9,9s1.794,4,4,4
c0.74,0,1.424-0.215,2.019-0.567l7.669,7.669C21.634,21.458,21,23.154,21,25s0.634,3.542,1.688,4.897L10.024,42.562
C8.958,41.595,7.549,41,6,41c-3.309,0-6,2.691-6,6s2.691,6,6,6s6-2.691,6-6c0-1.035-0.263-2.009-0.726-2.86l12.829-12.829
c1.106,0.86,2.44,1.436,3.898,1.619v10.16c-2.833,0.478-5,2.942-5,5.91c0,3.309,2.691,6,6,6s6-2.691,6-6c0-2.967-2.167-5.431-5-5.91
v-10.16c1.458-0.183,2.792-0.759,3.898-1.619l7.669,7.669C41.215,39.576,41,40.26,41,41c0,2.206,1.794,4,4,4s4-1.794,4-4
s-1.794-4-4-4c-0.74,0-1.424,0.215-2.019,0.567l-7.669-7.669C36.366,28.542,37,26.846,37,25s-0.634-3.542-1.688-4.897l9.665-9.665
C46.042,11.405,47.451,12,49,12c3.309,0,6-2.691,6-6S52.309,0,49,0z M11,9c0-1.103,0.897-2,2-2s2,0.897,2,2s-0.897,2-2,2
S11,10.103,11,9z M6,51c-2.206,0-4-1.794-4-4s1.794-4,4-4s4,1.794,4,4S8.206,51,6,51z M33,49c0,2.206-1.794,4-4,4s-4-1.794-4-4
s1.794-4,4-4S33,46.794,33,49z M29,31c-3.309,0-6-2.691-6-6s2.691-6,6-6s6,2.691,6,6S32.309,31,29,31z M47,41c0,1.103-0.897,2-2,2
s-2-0.897-2-2s0.897-2,2-2S47,39.897,47,41z M49,10c-2.206,0-4-1.794-4-4s1.794-4,4-4s4,1.794,4,4S51.206,10,49,10z"/>
</svg>
</div>
<div id="global-graph-outer">
<div id="global-graph-container" data-cfg={JSON.stringify(globalGraph)}></div>
</div>
</div>
}
Graph.css = style
Graph.afterDOMLoaded = script
return Graph
}) satisfies QuartzComponentConstructor

View file

@ -2,32 +2,47 @@ import { resolveToRoot } from "../path"
import { JSResourceToScriptElement } from "../resources"
import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
function Head({ fileData, externalResources }: QuartzComponentProps) {
const slug = fileData.slug!
const title = fileData.frontmatter?.title ?? "Untitled"
const description = fileData.description ?? "No description provided"
const { css, js } = externalResources
const baseDir = resolveToRoot(slug)
const iconPath = baseDir + "/static/icon.png"
const ogImagePath = baseDir + "/static/og-image.png"
return <head>
<title>{title}</title>
<meta charSet="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta property="og:title" content={title} />
<meta property="og:description" content={title} />
<meta property="og:image" content={ogImagePath} />
<meta property="og:width" content="1200" />
<meta property="og:height" content="675" />
<link rel="icon" href={iconPath} />
<meta name="description" content={description} />
<meta name="generator" content="Quartz" />
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" />
{css.map(href => <link key={href} href={href} rel="stylesheet" type="text/css" spa-preserve />)}
{js.filter(resource => resource.loadTime === "beforeDOMReady").map(res => JSResourceToScriptElement(res, true))}
</head>
interface Options {
prefetchContentIndex: boolean
}
export default (() => Head) satisfies QuartzComponentConstructor
const defaultOptions: Options = {
prefetchContentIndex: true
}
export default ((opts?: Options) => {
function Head({ fileData, externalResources }: QuartzComponentProps) {
const slug = fileData.slug!
const title = fileData.frontmatter?.title ?? "Untitled"
const description = fileData.description ?? "No description provided"
const { css, js } = externalResources
const baseDir = resolveToRoot(slug)
const iconPath = baseDir + "/static/icon.png"
const ogImagePath = baseDir + "/static/og-image.png"
const prefetchContentIndex = opts?.prefetchContentIndex ?? defaultOptions.prefetchContentIndex
const contentIndexPath = baseDir + "/static/contentIndex.json"
const contentIndexScript = `const fetchData = fetch(\`${contentIndexPath}\`).then(data => data.json())`
return <head>
<title>{title}</title>
<meta charSet="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta property="og:title" content={title} />
<meta property="og:description" content={title} />
<meta property="og:image" content={ogImagePath} />
<meta property="og:width" content="1200" />
<meta property="og:height" content="675" />
<link rel="icon" href={iconPath} />
<meta name="description" content={description} />
<meta name="generator" content="Quartz" />
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" />
{prefetchContentIndex && <script spa-preserve>{contentIndexScript}</script>}
{css.map(href => <link key={href} href={href} rel="stylesheet" type="text/css" spa-preserve />)}
{js.filter(resource => resource.loadTime === "beforeDOMReady").map(res => JSResourceToScriptElement(res, true))}
</head>
}
return Head
}) satisfies QuartzComponentConstructor

View file

@ -1,9 +1,9 @@
import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
function Header({ children }: QuartzComponentProps) {
return <header>
return (children.length > 0) ? <header>
{children}
</header>
</header> : null
}
Header.css = `
@ -11,12 +11,10 @@ header {
display: flex;
flex-direction: row;
align-items: center;
margin: 1em 0 2em 0;
& > h1 {
}
margin: 2em 0;
}
header > h1 {
header h1 {
margin: 0;
flex: auto;
}

View file

@ -1,11 +1,22 @@
import { resolveToRoot } from "../path"
import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
function PageTitle({ cfg, fileData }: QuartzComponentProps) {
const title = cfg.siteTitle
const slug = fileData.slug!
const baseDir = resolveToRoot(slug)
return <h1><a href={baseDir}>{title}</a></h1>
interface Options {
title: string
}
export default (() => PageTitle) satisfies QuartzComponentConstructor
export default ((opts?: Options) => {
const title = opts?.title ?? "Untitled Quartz"
function PageTitle({ fileData }: QuartzComponentProps) {
const slug = fileData.slug!
const baseDir = resolveToRoot(slug)
return <h1 class="page-title"><a href={baseDir}>{title}</a></h1>
}
PageTitle.css = `
.page-title {
margin: 0;
}
`
return PageTitle
}) satisfies QuartzComponentConstructor

View file

@ -18,7 +18,7 @@ function TableOfContents({ fileData }: QuartzComponentProps) {
return null
}
return <>
return <div>
<button type="button" id="toc">
<h3>Table of Contents</h3>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="fold">
@ -32,7 +32,7 @@ function TableOfContents({ fileData }: QuartzComponentProps) {
</li>)}
</ul>
</div>
</>
</div>
}
TableOfContents.css = modernStyle
TableOfContents.afterDOMLoaded = script

View file

@ -7,6 +7,7 @@ import ReadingTime from "./ReadingTime"
import Spacer from "./Spacer"
import TableOfContents from "./TableOfContents"
import TagList from "./TagList"
import Graph from "./Graph"
export {
ArticleTitle,
@ -17,5 +18,6 @@ export {
ReadingTime,
Spacer,
TableOfContents,
TagList
TagList,
Graph
}

View file

@ -0,0 +1,287 @@
import { ContentDetails } from "../../plugins/emitters/contentIndex"
import * as d3 from 'd3'
type NodeData = {
id: string,
text: string,
tags: string[]
} & d3.SimulationNodeDatum
type LinkData = {
source: string,
target: string
}
function relative(from: string, to: string) {
const pieces = [location.protocol, '//', location.host, location.pathname]
const url = pieces.join('').slice(0, -from.length) + to
return url
}
function removeAllChildren(node: HTMLElement) {
while (node.firstChild) {
node.removeChild(node.firstChild)
}
}
async function renderGraph(container: string, slug: string) {
const graph = document.getElementById(container)!
removeAllChildren(graph)
let {
drag: enableDrag,
zoom: enableZoom,
depth,
scale,
repelForce,
centerForce,
linkDistance,
fontSize,
opacityScale
} = JSON.parse(graph.dataset["cfg"]!)
const data = await fetchData
const links: LinkData[] = []
for (const [src, details] of Object.entries<ContentDetails>(data)) {
const outgoing = details.links ?? []
for (const dest of outgoing) {
if (src in data && dest in data) {
links.push({ source: src, target: dest })
}
}
}
const neighbourhood = new Set()
const wl = [slug, "__SENTINEL"]
if (depth >= 0) {
while (depth >= 0 && wl.length > 0) {
// compute neighbours
const cur = wl.shift()
if (cur === "__SENTINEL") {
depth--
wl.push("__SENTINEL")
} else {
neighbourhood.add(cur)
const outgoing = links.filter(l => l.source === cur)
const incoming = links.filter(l => l.target === cur)
wl.push(...outgoing.map((l) => l.target), ...incoming.map((l) => l.source))
}
}
} else {
links.flatMap(l => [l.source, l.target]).forEach((id) => neighbourhood.add(id))
}
const graphData: { nodes: NodeData[], links: LinkData[] } = {
nodes: Object.keys(data).filter(id => neighbourhood.has(id)).map(url => ({ id: url, text: data[url]?.title ?? url, tags: data[url]?.tags ?? [] })),
links: links.filter((l) => neighbourhood.has(l.source) && neighbourhood.has(l.target))
}
const simulation: d3.Simulation<NodeData, LinkData> = d3
.forceSimulation(graphData.nodes)
.force("charge", d3.forceManyBody().strength(-100 * repelForce))
.force(
"link",
d3
.forceLink(graphData.links)
.id((d: any) => d.id)
.distance(linkDistance),
)
.force("center", d3.forceCenter().strength(centerForce))
const height = Math.max(graph.offsetHeight, 250)
const width = graph.offsetWidth
const svg = d3
.select<HTMLElement, NodeData>('#' + container)
.append("svg")
.attr("width", width)
.attr("height", height)
.attr('viewBox', [-width / 2 / scale, -height / 2 / scale, width / scale, height / scale])
// draw links between nodes
const link = svg
.append("g")
.selectAll("line")
.data(graphData.links)
.join("line")
.attr("class", "link")
.attr("stroke", "var(--lightgray)")
.attr("stroke-width", 2)
// svg groups
const graphNode = svg.append("g").selectAll("g").data(graphData.nodes).enter().append("g")
// calculate radius
const color = (d: NodeData) => {
// TODO: does this handle the index page
const isCurrent = d.id === slug
return isCurrent ? "var(--secondary)" : "var(--gray)"
}
const drag = (simulation: d3.Simulation<NodeData, LinkData>) => {
function dragstarted(event: any, d: NodeData) {
if (!event.active) simulation.alphaTarget(1).restart()
d.fx = d.x
d.fy = d.y
}
function dragged(event: any, d: NodeData) {
d.fx = event.x
d.fy = event.y
}
function dragended(event: any, d: NodeData) {
if (!event.active) simulation.alphaTarget(0)
d.fx = null
d.fy = null
}
const noop = () => { }
return d3
.drag<Element, NodeData>()
.on("start", enableDrag ? dragstarted : noop)
.on("drag", enableDrag ? dragged : noop)
.on("end", enableDrag ? dragended : noop)
}
function nodeRadius(d: NodeData) {
const numLinks = links.filter((l: any) => l.source.id === d.id || l.target.id === d.id).length
return 2 + Math.sqrt(numLinks)
}
// draw individual nodes
const node = graphNode
.append("circle")
.attr("class", "node")
.attr("id", (d) => d.id)
.attr("r", nodeRadius)
.attr("fill", color)
.style("cursor", "pointer")
.on("click", (_, d) => {
const targ = relative(slug, d.id)
window.spaNavigate(new URL(targ))
})
.on("mouseover", function(_, d) {
const neighbours: string[] = data[slug].links ?? []
const neighbourNodes = d3.selectAll<HTMLElement, NodeData>(".node").filter((d) => neighbours.includes(d.id))
const currentId = d.id
const linkNodes = d3
.selectAll(".link")
.filter((d: any) => d.source.id === currentId || d.target.id === currentId)
// highlight neighbour nodes
neighbourNodes.transition().duration(200).attr("fill", color)
// highlight links
linkNodes.transition().duration(200).attr("stroke", "var(--gray)")
const bigFont = fontSize * 1.5
// show text for self
const parent = this.parentNode as HTMLElement
d3.select<HTMLElement, NodeData>(parent)
.raise()
.select("text")
.transition()
.duration(200)
.attr('opacityOld', d3.select(parent).select('text').style("opacity"))
.style('opacity', 1)
.style('font-size', bigFont + 'em')
})
.on("mouseleave", function(_, d) {
const currentId = d.id
const linkNodes = d3
.selectAll(".link")
.filter((d: any) => d.source.id === currentId || d.target.id === currentId)
linkNodes.transition().duration(200).attr("stroke", "var(--lightgray)")
const parent = this.parentNode as HTMLElement
d3.select<HTMLElement, NodeData>(parent)
.select("text")
.transition()
.duration(200)
.style('opacity', d3.select(parent).select('text').attr("opacityOld"))
.style('font-size', fontSize + 'em')
})
// @ts-ignore
.call(drag(simulation))
// draw labels
const labels = graphNode
.append("text")
.attr("dx", 0)
.attr("dy", (d) => nodeRadius(d) + 8 + "px")
.attr("text-anchor", "middle")
.text((d) => data[d.id]?.title || (d.id.charAt(1).toUpperCase() + d.id.slice(2)).replace("-", " "))
.style('opacity', (opacityScale - 1) / 3.75)
.style("pointer-events", "none")
.style('font-size', fontSize + 'em')
.raise()
// @ts-ignore
.call(drag(simulation))
// set panning
if (enableZoom) {
svg.call(
d3
.zoom<SVGSVGElement, NodeData>()
.extent([
[0, 0],
[width, height],
])
.scaleExtent([0.25, 4])
.on("zoom", ({ transform }) => {
link.attr("transform", transform)
node.attr("transform", transform)
const scale = transform.k * opacityScale;
const scaledOpacity = Math.max((scale - 1) / 3.75, 0)
labels.attr("transform", transform).style("opacity", scaledOpacity)
}),
)
}
// progress the simulation
simulation.on("tick", () => {
link
.attr("x1", (d: any) => d.source.x)
.attr("y1", (d: any) => d.source.y)
.attr("x2", (d: any) => d.target.x)
.attr("y2", (d: any) => d.target.y)
node
.attr("cx", (d: any) => d.x)
.attr("cy", (d: any) => d.y)
labels
.attr("x", (d: any) => d.x)
.attr("y", (d: any) => d.y)
})
}
function renderGlobalGraph() {
const slug = document.body.dataset["slug"]!
renderGraph("global-graph-container", slug)
const container = document.getElementById("global-graph-outer")
container?.classList.add("active")
function hideGlobalGraph(this: HTMLElement, e: HTMLElementEventMap["click"]) {
if (e.target !== this) return
container?.classList.remove("active")
const graph = document.getElementById("global-graph-container")!
removeAllChildren(graph)
}
container?.removeEventListener("click", hideGlobalGraph)
container?.addEventListener("click", hideGlobalGraph)
}
document.addEventListener("nav", async (e: unknown) => {
const slug = (e as CustomEventMap["nav"]).detail.url
await renderGraph("graph-container", slug)
const containerIcon = document.getElementById("global-graph-icon")
containerIcon?.removeEventListener("click", renderGlobalGraph)
containerIcon?.addEventListener("click", renderGlobalGraph)
})

View file

@ -1,39 +1,50 @@
import { computePosition, inline, shift, autoPlacement } from "@floating-ui/dom"
import { computePosition, flip, inline, shift } from "@floating-ui/dom"
document.addEventListener("nav", () => {
const links = [...document.getElementsByClassName("internal")] as HTMLLinkElement[]
const p = new DOMParser()
for (const link of links) {
link.addEventListener("mouseenter", async ({ clientX, clientY }) => {
if (link.dataset.fetchedPopover === "true") return
async function setPosition(popoverElement: HTMLElement) {
const { x, y } = await computePosition(link, popoverElement, {
middleware: [inline({
x: clientX,
y: clientY
}), shift(), flip()]
})
Object.assign(popoverElement.style, {
left: `${x}px`,
top: `${y}px`,
})
}
if (link.dataset.fetchedPopover === "true") {
return setPosition(link.lastChild as HTMLElement)
}
const url = link.href
const anchor = new URL(url).hash
if (anchor.startsWith("#")) return
const contents = await fetch(`${url}`)
.then((res) => res.text())
.catch((err) => {
console.error(err)
})
if (!contents) return
const html = p.parseFromString(contents, "text/html")
const elts = [...html.getElementsByClassName("popover-hint")]
if (elts.length === 0) return
const popoverElement = document.createElement("div")
popoverElement.classList.add("popover")
elts.forEach(elt => popoverElement.appendChild(elt))
const { x, y } = await computePosition(link, popoverElement, {
middleware: [inline({
x: clientX,
y: clientY
}), shift(), autoPlacement()]
})
Object.assign(popoverElement.style, {
left: `${x}px`,
top: `${y}px`,
})
const popoverInner = document.createElement("div")
popoverInner.classList.add("popover-inner")
popoverElement.appendChild(popoverInner)
elts.forEach(elt => popoverInner.appendChild(elt))
setPosition(popoverElement)
link.appendChild(popoverElement)
link.dataset.fetchedPopover = "true"
})

View file

@ -29,8 +29,8 @@ const getOpts = ({ target }: Event): { url: URL, scroll?: boolean } | undefined
return { url: new URL(href), scroll: 'routerNoscroll' in a.dataset ? false : undefined }
}
function notifyNav(slug: string) {
const event = new CustomEvent("nav", { detail: { slug } })
function notifyNav(url: string) {
const event: CustomEventMap["nav"] = new CustomEvent("nav", { detail: { url } })
document.dispatchEvent(event)
}
@ -73,6 +73,8 @@ async function navigate(url: URL, isBack: boolean = false) {
delete announcer.dataset.persist
}
window.spaNavigate = navigate
function createRouter() {
if (typeof window !== "undefined") {
window.addEventListener("click", async (event) => {

View file

@ -1,8 +1,7 @@
.darkmode {
float: right;
padding: 1rem;
min-width: 30px;
position: relative;
width: 20px;
height: 20px;
& > .toggle {
display: none;
@ -16,7 +15,6 @@
width: 20px;
height: 20px;
top: calc(50% - 10px);
margin: 0 7px;
fill: var(--darkgray);
transition: opacity 0.1s ease;
}

View file

@ -0,0 +1,68 @@
.graph {
& > h3 {
font-size: 1rem;
margin: 0
}
& > .graph-outer {
border-radius: 5px;
border: 1px solid var(--lightgray);
box-sizing: border-box;
height: 250px;
width: 300px;
margin: 0.5em 0;
position: relative;
& > #global-graph-icon {
color: var(--dark);
opacity: 0.5;
width: 18px;
height: 18px;
position: absolute;
padding: 0.2rem;
margin: 0.3rem;
top: 0;
right: 0;
border-radius: 4px;
background-color: transparent;
transition: background-color 0.5s ease;
cursor: pointer;
&:hover {
background-color: var(--lightgray);
}
}
& > #graph-container > svg {
margin-bottom: -5px;
}
}
& > #global-graph-outer {
position: fixed;
z-index: 9999;
left: 0;
top: 0;
width: 100vw;
height: 100%;
overflow: scroll;
backdrop-filter: blur(4px);
display: none;
&.active {
display: inline-block;
}
& > #global-graph-container {
border: 1px solid var(--lightgray);
background-color: var(--light);
border-radius: 5px;
box-sizing: border-box;
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
height: 60vh;
width: 50vw;
}
}
}

View file

@ -3,7 +3,7 @@
opacity: 0;
visibility: hidden;
}
50% {
1% {
opacity: 0;
}
100% {
@ -15,21 +15,24 @@
.popover {
z-index: 999;
position: absolute;
overflow: scroll;
width: 30rem;
height: 20rem;
padding: 0 1rem;
margin-top: -1rem;
border: 1px solid var(--lightgray);
background-color: var(--light);
border-radius: 5px;
box-shadow: 6px 6px 36px 0 rgba(0,0,0,0.25);
overflow: visible;
padding: 1rem;
font-weight: initial;
& > .popover-inner {
width: 30rem;
height: 20rem;
padding: 0 1rem 1rem 1rem;
font-weight: initial;
border: 1px solid var(--gray);
background-color: var(--light);
border-radius: 5px;
box-shadow: 6px 6px 36px 0 rgba(0,0,0,0.25);
overflow: scroll;
}
visibility: hidden;
opacity: 0;
transition: opacity 0.2s ease, visibility 0.2s ease;
transition: opacity 0.3s ease, visibility 0.3s ease;
@media all and (max-width: 600px) {
display: none !important;
@ -37,7 +40,7 @@
}
a:hover .popover, .popover:hover {
animation: dropin 0.5s ease;
opacity: 1;
visibility: visible;
animation: dropin 0.3s ease;
animation-fill-mode: forwards;
animation-delay: 0.2s;
}

View file

@ -30,6 +30,7 @@ button#toc {
overflow: hidden;
max-height: none;
transition: max-height 0.3s ease;
font-size: 0.9rem;
& ul {
list-style: none;
@ -38,7 +39,7 @@ button#toc {
& > li > a {
color: var(--dark);
opacity: 0.35;
transition: 0.5s ease opacity;
transition: 0.5s ease opacity, 0.3s ease color;
&.in-view {
opacity: 0.75;
}