// Hair · Colour & Treatment · Root touch-up — L3 data

const ROOT_TOUCHUP = {
  type: "Root Touch-Up",
  parent: { title: "Colour & Treatment", href: "/en/hair/colour-treatment/" },
  grandparent: { title: "Hair", href: "/en/hair/" },
  totalCount: 161,
  hero: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=1800&q=80&auto=format&fit=crop",
  heroAlt: "Editorial close-up — root regrowth line and fresh colour",
  h1: "How to do a root touch-up.",
  deck: "The gap between your last appointment and your next one doesn't have to be obvious. Root touch-up is one of the most precision-dependent colour techniques — applied too wide and you destroy the blend, applied with the right developer and the right coverage, and it extends your colour life by weeks.",
  intro: "Root touch-up means applying permanent or semi-permanent colour only to the regrowth — the band of natural (or less-processed) hair at the scalp. Done correctly, it matches the existing colour on your lengths, blends into it seamlessly, and gives you another four to six weeks before you need a full appointment. The two most common mistakes: applying the same formula as your original colour when the formula should be adjusted for the lighter lengths, and overlapping the colour onto previously coloured hair, which causes banding. Below is everything — at-home technique, when to go to the salon, grey coverage in a touch-up context, and how to extend the time between visits.",
  byline: "Edited by Nelly · Beauty & Style Director",
  meta: { count: 161, updated: "Updated 30 April 2026", reading: "Avg. 4 min per piece" },
};

const RT_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", cur: true, 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", 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 RT_QUICK_FACTS = {
  defn: {
    h: "Why root touch-up is its own technique",
    body: "Colour applied to the root processes differently from colour applied to previously coloured hair. The scalp generates heat, which speeds up development at the root. Previously coloured hair absorbs colour faster and can darken unpredictably. This is why applying the same formula root-to-tip in a touch-up produces banding: a noticeably darker band at the root where the fresh colour has processed over fresh hair, and a lighter band further down.",
  },
  myths: [
    { m: "I can just apply the same colour I always use.",
      t: "You can, but only to the regrowth. Never overlap onto previously coloured hair during a touch-up — even ten minutes on top of existing colour will cause banding and uneven depth." },
    { m: "Root touch-up and root smudge are the same thing.",
      t: "A root smudge uses a darker shade deliberately applied to the root of highlighted or lightened hair to soften the contrast. A root touch-up applies colour to match the root to the lengths. Different goals, different formulas." },
    { m: "Doing touch-ups too often will damage the hair.",
      t: "As long as you're not overlapping, touch-ups target new growth only — hair that hasn't been processed before. They don't add cumulative damage to the same section of hair." },
  ],
};

const RT_BEGINNER_PATH = {
  h: "Doing your own roots for the first time?",
  deck: "Four pieces. About fifteen minutes. Everything you need to avoid the most common mistakes.",
  steps: [
    { n: "01", t: "The banding problem — and how to avoid it", time: "4 min", note: "Why overlap is the enemy, and how to apply precisely to new growth only." },
    { n: "02", t: "Choosing the right developer for a root touch-up", time: "3 min", note: "20 vol vs 30 vol at the root — what the numbers mean." },
    { n: "03", t: "At-home root touch-up: a step-by-step method", time: "5 min", note: "Sectioning, application tools, timing, and rinsing." },
    { n: "04", t: "When to go to the salon instead", time: "3 min", note: "Complex colour history, grey coverage, first touch-up — when DIY is the wrong call." },
  ],
};

const RT_TRENDING = [
  { rank: "01", t: "How to avoid the banding line on at-home root touch-ups", time: "5 min", auth: "Nelly", date: "Apr 27", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=1100&q=80&auto=format&fit=crop", reads: "15,780" },
  { rank: "02", t: "Root touch-up at home: a method guide", time: "4 min", auth: "Iris",  date: "Apr 21", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=1100&q=80&auto=format&fit=crop", reads: "12,450" },
  { rank: "03", t: "The root smudge technique — when and why", time: "4 min", auth: "Nelly", date: "Apr 14", img: "https://images.unsplash.com/photo-1562322140-8baeececf3df?w=1100&q=80&auto=format&fit=crop", reads: "9,103" },
  { rank: "04", t: "Developer strength at the root: 10, 20 or 30 vol?", time: "3 min", auth: "Iris",  date: "Apr 07", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=1100&q=80&auto=format&fit=crop", reads: "8,340" },
  { rank: "05", t: "How to stretch root touch-up appointments by two weeks", time: "3 min", auth: "Nelly", date: "Mar 31", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=1100&q=80&auto=format&fit=crop", reads: "6,891" },
];

const RT_FORMAT_GUIDE = {
  h: "Touch-up method, by colour situation",
  deck: "What approach works, and what to avoid, depending on your hair's history.",
  formats: [
    { name: "Solid permanent", when: "Matching an all-over permanent colour at the root only", avoid: "Overlapping onto lengths — causes banding", note: "Most common situation. Apply only to new growth.", verdict: "★ Standard" },
    { name: "Semi-permanent root", when: "Refreshing tone without commitment, fading grey temporarily", avoid: "Heavy grey coverage above 50%", note: "Deposits only, no lift. Fades gracefully.", verdict: "Low-commitment" },
    { name: "Root smudge",  when: "Highlighted/balayaged hair with visible contrast at root", avoid: "If you want a sharp colour boundary", note: "A darker shade applied to blur the root line rather than match it.", verdict: "Softening" },
    { name: "Root concealer spray", when: "Events, last-minute coverage, hairline greys", avoid: "Humid environments, or if you need to touch your hair", note: "Temporary. Transfers. Not a substitute for real colour.", verdict: "Emergency" },
  ],
};

const RT_HOWTOS = [
  { t: "How to avoid the banding line on at-home root touch-ups", time: 5, tech: "Technique", auth: "Nelly", date: "Apr 27", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=900&q=80&auto=format&fit=crop", kick: "Technique", pick: true },
  { t: "Root touch-up at home: a method guide", time: 4, tech: "Method", auth: "Iris",  date: "Apr 21", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Method", pick: true },
  { t: "The root smudge technique — when and why", time: 4, tech: "Technique", auth: "Nelly", date: "Apr 14", img: "https://images.unsplash.com/photo-1562322140-8baeececf3df?w=900&q=80&auto=format&fit=crop", kick: "Technique", pick: true },
  { t: "Developer strength at the root: 10, 20 or 30 vol?", time: 3, tech: "Products", auth: "Iris",  date: "Apr 07", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "How to stretch touch-up appointments by two weeks", time: 3, tech: "Maintenance", auth: "Nelly", date: "Mar 31", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Tip", pick: false },
  { t: "Touch-up on highlighted hair — what's different", time: 4, tech: "Technique", auth: "Iris",  date: "Mar 23", img: "https://images.unsplash.com/photo-1562322140-8baeececf3df?w=900&q=80&auto=format&fit=crop", kick: "Technique", pick: false },
  { t: "When to see a colourist instead of doing it at home", time: 3, tech: "Consultation", auth: "Nelly", date: "Mar 15", img: "https://images.unsplash.com/photo-1560869713-7d0a29430803?w=900&q=80&auto=format&fit=crop", kick: "Consultation", pick: false },
  { t: "Root-to-tip vs root-only application: the stakes", time: 4, tech: "Technique", auth: "Iris",  date: "Mar 07", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
];

const RT_TECH_FILTERS = ["All", "Technique", "Method", "Products", "Maintenance", "Consultation", "Essay"];

const RT_CT_CROSSLINKS = [
  { id: "grey-coverage",  title: "Grey coverage",   deck: "When touch-up and coverage are the same appointment.",  count: 172, href: "/en/hair/colour-treatment/grey-coverage/" },
  { id: "colour-fade",   title: "Colour fade",      deck: "Extend the time between every touch-up.",              count: 167, href: "/en/hair/colour-treatment/colour-fade/" },
  { id: "going-darker",  title: "Going darker",     deck: "Permanent change needs a different approach.",          count: 158, href: "/en/hair/colour-treatment/going-darker/" },
  { id: "post-salon-week", title: "Post-salon week", deck: "The 7 days that determine how long your colour lasts.", count: 183, href: "/en/hair/colour-treatment/post-salon-week/" },
];

Object.assign(window, {
  ROOT_TOUCHUP, RT_SIBLINGS, RT_QUICK_FACTS, RT_BEGINNER_PATH, RT_TRENDING, RT_FORMAT_GUIDE, RT_HOWTOS, RT_TECH_FILTERS, RT_CT_CROSSLINKS,
});