// Nails · Cuticle Care · The Growth Line — L3 data

const OILY = {
  type: "The Growth Line",
  parent: { title: "Cuticle Care", href: "/en/nails/cuticle-care/" },
  grandparent: { title: "Nails", href: "/en/nails/" },
  totalCount: 58,
  hero: "https://images.unsplash.com/photo-1604902396830-aca29e19b067?w=1800&q=80&auto=format&fit=crop",
  heroAlt: "Close-up of a nail showing the proximal fold and growth line at the base",
  h1: "The growth line — what it is and why everything starts here.",
  deck: "The proximal fold is where the nail is made. Understanding it changes how you read cuticle health, gel lifting, and every other nail concern.",
  intro: "Most people know where their nails grow from in the most general sense — the base of the finger. Few understand what is actually happening at that point, or why it matters for everything from cuticle condition to gel adhesion to the way a nail breaks. The proximal fold is the fold of skin at the very base of the nail plate. Underneath it, at the nail matrix, is where the cells that become nail plate are produced. The thin, often-translucent skin visible at the nail base — the one people push back or cut off — is the exposed edge of that fold. How this fold is treated determines the health of the nail growth beneath it. Compress it with tight footwear. Flood it with aggressive gel application that lifts at the fold. Cut into it and disturb the matrix. All of these affect the growth line, and all of them affect the nail that comes out the other side. This page covers the anatomy of the growth line, how to read it for signs of health or compression, and what gel lifting at the proximal fold means.",
  byline: "Edited by Nelly · Beauty & Style Director",
  meta: { count: 58, updated: "Updated 26 April 2026", reading: "Avg. 5 min per piece" },
};

const TYPE_SIBLINGS = [
  { id: "oil-routine",   title: "Oil Routine",     n: "01",             href: "/en/nails/cuticle-care/oil-routine/" },
  { id: "push-dont-cut", title: "Push, Don't Cut", n: "02",             href: "/en/nails/cuticle-care/push-dont-cut/" },
  { id: "hangnails",     title: "Hangnails",        n: "03",             href: "/en/nails/cuticle-care/hangnails/" },
  { id: "salon-cleanup", title: "Salon Cleanup",    n: "04",             href: "/en/nails/cuticle-care/salon-cleanup/" },
  { id: "growth-line",   title: "The Growth Line",  n: "05", cur: true,  href: "/en/nails/cuticle-care/growth-line/" },
];

const QUICK_FACTS = {
  defn: {
    h: "What the proximal fold and growth line actually are",
    body: "The nail matrix is the tissue under the proximal fold — the fold of skin at the very base of the nail. It is the nail factory. Cells in the matrix multiply and differentiate into the hard keratinised plate that becomes the nail. The lunula — the pale crescent at the nail base — is the visible part of the matrix. The proximal fold itself is the layer of skin that overlies it and seals it from external exposure. When people refer to 'the growth line' they mean the visible boundary between the proximal fold and the emerging nail plate. A healthy growth line is smooth, consistent across the nail's width, and without visible ridging, compression marks, or lifted edges. Reading it gives a reliable picture of what has been happening to the nail over the previous several weeks.",
  },
  myths: [
    { m: "The lunula is just a cosmetic feature.",
      t: "The lunula is the visible portion of the nail matrix. Its size, shape, and visibility change in response to nutritional status, circulation, and physical pressure on the proximal fold. It is a read on matrix health, not a decoration." },
    { m: "Gel lifting at the cuticle edge is a product application problem.",
      t: "Gel that lifts specifically at the proximal fold — not across the plate — is almost always a preparation problem: oil or moisture on the nail plate right at the fold, or cuticle skin that was not fully pushed back before gel application." },
    { m: "Horizontal ridges in nails have nothing to do with the growth line.",
      t: "Beau's lines — the horizontal ridges that run across the full width of the nail — originate at the matrix. They form when nail production is temporarily disrupted. The growth line is where they start." },
  ],
};

const BEGINNER_PATH = {
  h: "Start here, if nail anatomy is new to you.",
  deck: "Five pieces, in order. About twenty-two minutes of reading. Enough to understand what the growth line is telling you.",
  steps: [
    { n: "01", t: "The nail matrix — what it is and where it sits",     time: "5 min", note: "The tissue under the proximal fold and why it is the origin of every nail concern." },
    { n: "02", t: "Reading the lunula — what its appearance means",     time: "4 min", note: "Size, visibility, and what changes in the lunula indicate." },
    { n: "03", t: "Healthy vs compressed proximal fold — what to look for", time: "5 min", note: "The signs of a fold under chronic pressure and what causes it." },
    { n: "04", t: "Gel lifting at the proximal fold — the real cause",  time: "4 min", note: "Why lifting happens at the growth line and how to prevent it." },
    { n: "05", t: "Horizontal ridges — where they form and what triggers them", time: "4 min", note: "Beau's lines, matrix disruption, and what the timeline tells you." },
  ],
};

const TRENDING = [
  { rank: "01", t: "What gel lifting at the proximal fold actually means",      time: "4 min", auth: "Nelly", date: "Apr 24", img: "https://images.unsplash.com/photo-1604902396830-aca29e19b067?w=1100&q=80&auto=format&fit=crop", reads: "7,640" },
  { rank: "02", t: "How to read the lunula — size, shape, and visibility",      time: "4 min", auth: "Iris",  date: "Apr 20", img: "https://images.unsplash.com/photo-1522337660859-02fbefca4702?w=1100&q=80&auto=format&fit=crop", reads: "6,380" },
  { rank: "03", t: "What Beau's lines are and where they start",                time: "5 min", auth: "Nelly", date: "Apr 16", img: "https://images.unsplash.com/photo-1604654894610-df63bc536371?w=1100&q=80&auto=format&fit=crop", reads: "5,920" },
  { rank: "04", t: "Healthy proximal fold vs compressed — how to tell",         time: "5 min", auth: "Nelly", date: "Apr 11", img: "https://images.unsplash.com/photo-1599948128020-9a44505b0d1b?w=1100&q=80&auto=format&fit=crop", reads: "5,110" },
  { rank: "05", t: "Why nail prep at the growth line prevents gel lifting",     time: "4 min", auth: "Iris",  date: "Apr 06", img: "https://images.unsplash.com/photo-1608248597279-f99d160bfcbc?w=1100&q=80&auto=format&fit=crop", reads: "4,430" },
];

const FORMAT_GUIDE = {
  h: "Growth line reading, by sign",
  deck: "What each visible change at the proximal fold indicates — and how to respond.",
  formats: [
    { name: "Smooth, consistent edge",          when: "Reading: healthy growth line, consistent nail production", avoid: "Over-interpreting minor variations in appearance", note: "A smooth, even boundary between the fold and the emerging nail plate is the baseline healthy state.", verdict: "No action needed" },
    { name: "Horizontal ridge across the plate", when: "Reading: past disruption to nail production at the matrix", avoid: "Filing the ridge flat — it will grow out on its own",   note: "Beau's lines form when the matrix pauses production. The ridge moves distally as the nail grows. Timeline: ~3mm of growth per month.", verdict: "Watch and wait" },
    { name: "Visible lifting at the fold edge",  when: "Reading: gel or polish lifting specifically at the proximal fold", avoid: "Resealing with top coat — the prep needs to be addressed", note: "Lifting at the fold means the nail plate was not fully dry and free of skin at the point of application.", verdict: "Prep problem — fix at source" },
    { name: "Compressed or flattened fold",      when: "Reading: chronic pressure on the proximal fold",            avoid: "Aggressive pushing — the tissue is already stressed",     note: "A compressed fold results from tight footwear, chronic pressure, or repeated hard contact. The lunula may shrink on the affected nail.", verdict: "Reduce pressure" },
    { name: "Redness or puffiness at the fold",  when: "Reading: inflammation at or near the matrix",              avoid: "Any nail service until the inflammation resolves",         note: "Inflammation at the proximal fold can affect the nail being produced beneath it. Pause any cuticle work.", verdict: "Rest — no nail service" },
    { name: "Irregular or wavy growth line",     when: "Reading: uneven matrix production, possibly from past damage", avoid: "Trying to correct with filing",                          note: "An uneven growth line often reflects past trauma to the matrix — a blow, a heavy cuticle cut that reached the fold, or illness.", verdict: "Grows out over time" },
  ],
};

const HOWTOS = [
  { t: "The nail matrix — what it is and where it sits",              time: 5, tech: "Anatomy",    auth: "Nelly", date: "Apr 24", img: "https://images.unsplash.com/photo-1604902396830-aca29e19b067?w=900&q=80&auto=format&fit=crop", kick: "Anatomy",    pick: true },
  { t: "Reading the lunula — what its appearance means",              time: 4, tech: "Reading",    auth: "Iris",  date: "Apr 20", img: "https://images.unsplash.com/photo-1522337660859-02fbefca4702?w=900&q=80&auto=format&fit=crop", kick: "Reading",    pick: true },
  { t: "Gel lifting at the proximal fold — what it means",            time: 4, tech: "Gel",        auth: "Nelly", date: "Apr 16", img: "https://images.unsplash.com/photo-1604654894610-df63bc536371?w=900&q=80&auto=format&fit=crop", kick: "Gel",        pick: true },
  { t: "Healthy vs compressed proximal fold",                         time: 5, tech: "Reading",    auth: "Nelly", date: "Apr 11", img: "https://images.unsplash.com/photo-1599948128020-9a44505b0d1b?w=900&q=80&auto=format&fit=crop", kick: "Reading",    pick: true },
  { t: "Beau's lines — where they form and what they indicate",      time: 5, tech: "Signs",      auth: "Iris",  date: "Apr 06", img: "https://images.unsplash.com/photo-1608248597279-f99d160bfcbc?w=900&q=80&auto=format&fit=crop", kick: "Signs",      pick: true },
  { t: "Nail prep at the growth line — why it prevents lifting",      time: 4, tech: "Gel",        auth: "Nelly", date: "Apr 02", img: "https://images.unsplash.com/photo-1604902396830-aca29e19b067?w=900&q=80&auto=format&fit=crop", kick: "Gel",        pick: false },
  { t: "The proximal fold — what the cuticle edge connects to",      time: 4, tech: "Anatomy",    auth: "Iris",  date: "Mar 28", img: "https://images.unsplash.com/photo-1522337660859-02fbefca4702?w=900&q=80&auto=format&fit=crop", kick: "Anatomy",    pick: false },
  { t: "Matrix trauma — what damages the growth line",                time: 5, tech: "Signs",      auth: "Nelly", date: "Mar 23", img: "https://images.unsplash.com/photo-1604654894610-df63bc536371?w=900&q=80&auto=format&fit=crop", kick: "Signs",      pick: false },
  { t: "How fast nails grow — the matrix timeline",                   time: 4, tech: "Anatomy",    auth: "Iris",  date: "Mar 18", img: "https://images.unsplash.com/photo-1599948128020-9a44505b0d1b?w=900&q=80&auto=format&fit=crop", kick: "Anatomy",    pick: false },
  { t: "Why the lunula is smaller on some fingers than others",       time: 3, tech: "Reading",    auth: "Nelly", date: "Mar 14", img: "https://images.unsplash.com/photo-1608248597279-f99d160bfcbc?w=900&q=80&auto=format&fit=crop", kick: "Reading",    pick: false },
  { t: "What tight footwear does to toenail growth lines",            time: 4, tech: "Signs",      auth: "Iris",  date: "Mar 09", img: "https://images.unsplash.com/photo-1604902396830-aca29e19b067?w=900&q=80&auto=format&fit=crop", kick: "Signs",      pick: false },
  { t: "Inflammation at the proximal fold — what to watch for",      time: 4, tech: "Signs",      auth: "Nelly", date: "Mar 05", img: "https://images.unsplash.com/photo-1522337660859-02fbefca4702?w=900&q=80&auto=format&fit=crop", kick: "Signs",      pick: false },
  { t: "Gel application and the growth line — the prep zone",         time: 4, tech: "Gel",        auth: "Iris",  date: "Feb 28", img: "https://images.unsplash.com/photo-1604654894610-df63bc536371?w=900&q=80&auto=format&fit=crop", kick: "Gel",        pick: false },
  { t: "Why one nail has a different growth rate to its neighbours",  time: 4, tech: "Anatomy",    auth: "Nelly", date: "Feb 24", img: "https://images.unsplash.com/photo-1599948128020-9a44505b0d1b?w=900&q=80&auto=format&fit=crop", kick: "Anatomy",    pick: false },
  { t: "Pitting at the growth line — reading the pattern",            time: 5, tech: "Signs",      auth: "Iris",  date: "Feb 19", img: "https://images.unsplash.com/photo-1608248597279-f99d160bfcbc?w=900&q=80&auto=format&fit=crop", kick: "Signs",      pick: false },
  { t: "How cuticle oil reaches the matrix fold",                     time: 3, tech: "Care",       auth: "Nelly", date: "Feb 14", img: "https://images.unsplash.com/photo-1604902396830-aca29e19b067?w=900&q=80&auto=format&fit=crop", kick: "Care",       pick: false },
  { t: "What happens to the matrix during gel removal",               time: 4, tech: "Gel",        auth: "Iris",  date: "Feb 09", img: "https://images.unsplash.com/photo-1522337660859-02fbefca4702?w=900&q=80&auto=format&fit=crop", kick: "Gel",        pick: false },
  { t: "Cuticle compression — what it looks like over time",          time: 4, tech: "Signs",      auth: "Nelly", date: "Feb 05", img: "https://images.unsplash.com/photo-1604654894610-df63bc536371?w=900&q=80&auto=format&fit=crop", kick: "Signs",      pick: false },
  { t: "The growth line after illness — what the nail records",        time: 5, tech: "Reading",    auth: "Iris",  date: "Jan 30", img: "https://images.unsplash.com/photo-1599948128020-9a44505b0d1b?w=900&q=80&auto=format&fit=crop", kick: "Reading",    pick: false },
  { t: "Extension application and the proximal fold — clearance rules", time: 4, tech: "Gel",     auth: "Nelly", date: "Jan 25", img: "https://images.unsplash.com/photo-1608248597279-f99d160bfcbc?w=900&q=80&auto=format&fit=crop", kick: "Gel",        pick: false },
];

const TECH_FILTERS = ["All", "Anatomy", "Reading", "Gel", "Signs", "Care"];

const TYPE_CROSSLINKS = [
  { id: "oil-routine",   title: "Oil Routine",    deck: "Conditioning the skin right above the matrix.",        count: 94, href: "/en/nails/cuticle-care/oil-routine/" },
  { id: "push-dont-cut", title: "Push, Don't Cut", deck: "Moving the skin away from the growth line correctly.", count: 78, href: "/en/nails/cuticle-care/push-dont-cut/" },
  { id: "hangnails",     title: "Hangnails",        deck: "Skin tags that lift from the lateral fold.",           count: 65, href: "/en/nails/cuticle-care/hangnails/" },
  { id: "salon-cleanup", title: "Salon Cleanup",    deck: "What the technician is doing at the proximal fold.",  count: 71, href: "/en/nails/cuticle-care/salon-cleanup/" },
];

Object.assign(window, {
  OILY, TYPE_SIBLINGS, QUICK_FACTS, BEGINNER_PATH, TRENDING, FORMAT_GUIDE, HOWTOS, TECH_FILTERS, TYPE_CROSSLINKS,
});