// Hair · Colour & Treatment · Grey Coverage — L3 data

const GREY_COVERAGE = {
  type: "Grey Coverage",
  parent: { title: "Colour & Treatment", href: "/en/hair/colour-treatment/" },
  grandparent: { title: "Hair", href: "/en/hair/" },
  totalCount: 172,
  hero: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=1800&q=80&auto=format&fit=crop",
  heroAlt: "Editorial close-up — silver-grey and coloured hair transition",
  h1: "How to cover grey hair.",
  deck: "Grey coverage is the most technically demanding of the routine colour services. Grey hair has no pigment and a thicker, more resistant cuticle — it doesn't absorb colour the same way natural hair does. Getting it right takes the right developer, the right tone, and, often, a blending strategy rather than a blanket cover.",
  intro: "Covering grey is not the same as colouring natural hair. Grey hair is entirely devoid of melanin — the cuticle is often more compact and resistant to colour penetration, and the strand itself tends to be coarser and drier. These characteristics mean that colour applied to grey needs a higher developer to open the cuticle, specific formulation to ensure true coverage (rather than a colour that sits on the surface and fades within two washes), and careful attention to the tone. Cool greys can absorb warm tones and come out an unexpected brassy or violet. The alternative — embracing and enhancing grey rather than covering it — is covered here too. Below is everything: full coverage, partial blending, going grey gracefully, and the maintenance reality for both paths.",
  byline: "Edited by Nelly · Beauty & Style Director",
  meta: { count: 172, updated: "Updated 02 May 2026", reading: "Avg. 4 min per piece" },
};

const GRC_SIBLINGS = [
  { id: "gloss",                 title: "Gloss",                  n: "01", href: "/en/hair/colour-treatment/gloss/" },
  { id: "balayage",              title: "Balayage",               n: "02", href: "/en/hair/colour-treatment/balayage/" },
  { id: "highlights",            title: "Highlights",             n: "03", href: "/en/hair/colour-treatment/highlights/" },
  { id: "root-touchup",         title: "Root touch-up",          n: "04", href: "/en/hair/colour-treatment/root-touchup/" },
  { id: "going-darker",         title: "Going darker",           n: "05", href: "/en/hair/colour-treatment/going-darker/" },
  { id: "going-lighter",        title: "Going lighter",          n: "06", href: "/en/hair/colour-treatment/going-lighter/" },
  { id: "grey-coverage",        title: "Grey coverage",          n: "07", cur: true, href: "/en/hair/colour-treatment/grey-coverage/" },
  { id: "vivids-care",          title: "Vivids care",            n: "08", href: "/en/hair/colour-treatment/vivids-care/" },
  { id: "bond-builder",         title: "Bond builder",           n: "09", href: "/en/hair/colour-treatment/bond-builder/" },
  { id: "sulphate-free-routine", title: "Sulphate-free routine", n: "10", href: "/en/hair/colour-treatment/sulphate-free-routine/" },
  { id: "post-salon-week",      title: "Post-salon week",        n: "11", href: "/en/hair/colour-treatment/post-salon-week/" },
  { id: "colour-fade",          title: "Colour fade",            n: "12", href: "/en/hair/colour-treatment/colour-fade/" },
];

const GRC_QUICK_FACTS = {
  defn: {
    h: "Why grey hair resists colour differently",
    body: "Grey hair has a higher concentration of keratin and a thicker, more tightly sealed cuticle. Combined with zero melanin (which normally acts as a colour anchor), this makes grey more resistant to dye penetration and more prone to colour fading quickly. True grey coverage requires 20 or 30 volume developer, a formula with sufficient natural-base concentration, and often a slightly warmer tone than your natural colour to account for how grey absorbs cool pigments.",
  },
  myths: [
    { m: "Any permanent colour covers grey.",
      t: "Low-developer semi-permanent colours and some deposit-only formulas don't penetrate resistant grey adequately. Look for products specifically formulated for 100% grey coverage — the ratio of colour bases matters." },
    { m: "Going grey naturally is easier than colouring.",
      t: "The grow-out stage — 12 to 18 months — is the hardest part. The line between coloured and incoming grey requires either a deliberate blending strategy (highlights or lowlights to soften the contrast) or commitment to regular cuts." },
    { m: "Cool grey coverage results in grey hair.",
      t: "Applying cool-toned (ashy) colour to grey without any warm base tends to read violet or blue on grey hair. A slight warm adjustment in the formula produces a natural-looking result." },
  ],
};

const GRC_BEGINNER_PATH = {
  h: "Navigating grey for the first time?",
  deck: "Four pieces. About fifteen minutes. Whether you want to cover it or keep it — start here.",
  steps: [
    { n: "01", t: "Why grey hair needs a different approach", time: "3 min", note: "The cuticle, the developer, and the formula — what's different." },
    { n: "02", t: "Full coverage vs blending: which is right for you?", time: "4 min", note: "The coverage spectrum from 100% cover to strategic embrace." },
    { n: "03", t: "Going grey gracefully: the grow-out strategy", time: "5 min", note: "How to manage the transition without looking 'in between'." },
    { n: "04", t: "The grey-coverage maintenance schedule", time: "3 min", note: "How often, which products, and what to do between appointments." },
  ],
};

const GRC_TRENDING = [
  { rank: "01", t: "Going grey gracefully — the grow-out strategy", time: "5 min", auth: "Nelly", date: "Apr 29", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=1100&q=80&auto=format&fit=crop", reads: "19,540" },
  { rank: "02", t: "Why your grey coverage fades by week three", time: "4 min", auth: "Iris",  date: "Apr 22", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=1100&q=80&auto=format&fit=crop", reads: "14,230" },
  { rank: "03", t: "Blending grey with highlights: a technique guide", time: "5 min", auth: "Nelly", date: "Apr 16", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=1100&q=80&auto=format&fit=crop", reads: "11,105" },
  { rank: "04", t: "The best tones for covering grey — and the ones that fail", time: "4 min", auth: "Iris",  date: "Apr 09", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=1100&q=80&auto=format&fit=crop", reads: "9,660" },
  { rank: "05", t: "Root touch-up on grey: frequency and timing", time: "3 min", auth: "Nelly", date: "Apr 01", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=1100&q=80&auto=format&fit=crop", reads: "7,920" },
];

const GRC_FORMAT_GUIDE = {
  h: "Grey coverage strategy, by grey percentage",
  deck: "Coverage isn't binary — the right approach depends on how much grey you have.",
  formats: [
    { name: "Under 30% grey",    when: "Blending is possible — highlights or lowlights to camouflage", avoid: "Full coverage if your goal is natural-looking", note: "Colour-blend strategy works beautifully here. The natural dark base provides the depth needed.", verdict: "Blend it" },
    { name: "30–50% grey",       when: "Partial blending, or full coverage depending on the goal", avoid: "Ignoring the transition — it will show within 4 weeks", note: "The most common scenario. Both paths work. The choice is personal and maintenance-led.", verdict: "Decision point" },
    { name: "Over 50% grey",     when: "Full coverage (if covering) or full embrace (if going natural)", avoid: "Half-hearted blending — it reads unintentional", note: "Either go all the way one direction or the other. Commit.", verdict: "Go all in" },
    { name: "Going silver",      when: "Enhancing natural grey rather than covering — toning and glossing", avoid: "Yellow or warm grey — silver needs a violet or blue toner", note: "The fastest-growing segment in hair colour. A toning gloss every 6 weeks.", verdict: "Growing trend" },
    { name: "Full coverage",     when: "Matching original colour, uniform result across all grey", avoid: "Ashy tones on highly resistant grey without formula adjustment", note: "The most maintenance-intensive. Every 4–6 weeks without fail.", verdict: "High-maintenance" },
  ],
};

const GRC_HOWTOS = [
  { t: "Going grey gracefully — the grow-out strategy", time: 5, tech: "Technique", auth: "Nelly", date: "Apr 29", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=900&q=80&auto=format&fit=crop", kick: "Technique", pick: true },
  { t: "Why your grey coverage fades by week three", time: 4, tech: "Troubleshoot", auth: "Iris",  date: "Apr 22", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Troubleshoot", pick: true },
  { t: "Blending grey with highlights: a technique guide", time: 5, tech: "Technique", auth: "Nelly", date: "Apr 16", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=900&q=80&auto=format&fit=crop", kick: "Technique", pick: true },
  { t: "The best tones for covering grey — and the ones that fail", time: 4, tech: "Consultation", auth: "Iris",  date: "Apr 09", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=900&q=80&auto=format&fit=crop", kick: "Consultation", pick: false },
  { t: "Root touch-up on grey: frequency and timing", time: 3, tech: "Maintenance", auth: "Nelly", date: "Apr 01", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=900&q=80&auto=format&fit=crop", kick: "Routine", pick: false },
  { t: "Enhancing silver: toning grey hair to look intentional", time: 4, tech: "Toning", auth: "Iris",  date: "Mar 24", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Toning", pick: false },
  { t: "Developer strength for grey coverage — why 20 vol matters", time: 3, tech: "Products", auth: "Nelly", date: "Mar 16", img: "https://images.unsplash.com/photo-1580618672591-eb180b1a973f?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "At-home grey coverage: what to buy and how to apply", time: 5, tech: "At-home", auth: "Iris",  date: "Mar 08", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=900&q=80&auto=format&fit=crop", kick: "Method", pick: false },
];

const GRC_TECH_FILTERS = ["All", "Technique", "Consultation", "Toning", "Maintenance", "At-home", "Products", "Troubleshoot", "Essay"];

const GRC_CT_CROSSLINKS = [
  { id: "root-touchup",  title: "Root touch-up",  deck: "Grey coverage's closest companion service.",            count: 161, href: "/en/hair/colour-treatment/root-touchup/" },
  { id: "colour-fade",  title: "Colour fade",     deck: "Grey coverage fades differently — here's the calendar.", count: 167, href: "/en/hair/colour-treatment/colour-fade/" },
  { id: "gloss",         title: "Gloss",           deck: "Toning silver grey to look clean and intentional.",     count: 189, href: "/en/hair/colour-treatment/gloss/" },
  { id: "sulphate-free-routine", title: "Sulphate-free routine", deck: "Every grey-coverage routine starts with the right shampoo.", count: 143, href: "/en/hair/colour-treatment/sulphate-free-routine/" },
];

Object.assign(window, {
  GREY_COVERAGE, GRC_SIBLINGS, GRC_QUICK_FACTS, GRC_BEGINNER_PATH, GRC_TRENDING, GRC_FORMAT_GUIDE, GRC_HOWTOS, GRC_TECH_FILTERS, GRC_CT_CROSSLINKS,
});