export interface MilestoneDef {
  key: string;
  label: string;
  ageMonths: number;
  ageRangeLabel: string;
  category: "social" | "motor" | "language" | "cognitive";
  emoji: string;
}

export const MILESTONES: MilestoneDef[] = [
  // 1–2 months
  { key: "lifts_head",          label: "Lifts head briefly",            ageMonths: 1,  ageRangeLabel: "1 month",   category: "motor",    emoji: "💪" },
  { key: "social_smile",        label: "Social smile",                  ageMonths: 2,  ageRangeLabel: "2 months",  category: "social",   emoji: "😊" },
  { key: "follows_movement",    label: "Follows movement with eyes",    ageMonths: 2,  ageRangeLabel: "2 months",  category: "cognitive",emoji: "👁️" },
  // 3–4 months
  { key: "coos",                label: "Coos and makes sounds",         ageMonths: 3,  ageRangeLabel: "3 months",  category: "language", emoji: "🗣️" },
  { key: "recognizes_faces",    label: "Recognizes familiar faces",     ageMonths: 3,  ageRangeLabel: "3 months",  category: "social",   emoji: "👨‍👩‍👧" },
  { key: "holds_head_steady",   label: "Holds head steady",             ageMonths: 4,  ageRangeLabel: "4 months",  category: "motor",    emoji: "🦒" },
  { key: "laughs",              label: "Laughs out loud",               ageMonths: 4,  ageRangeLabel: "4 months",  category: "social",   emoji: "😂" },
  // 5–6 months
  { key: "reaches_objects",     label: "Reaches for objects",           ageMonths: 5,  ageRangeLabel: "5 months",  category: "cognitive",emoji: "✋" },
  { key: "rolls_over",          label: "Rolls over (front to back)",    ageMonths: 5,  ageRangeLabel: "5 months",  category: "motor",    emoji: "🔄" },
  { key: "sits_with_support",   label: "Sits with support",             ageMonths: 6,  ageRangeLabel: "6 months",  category: "motor",    emoji: "🧸" },
  // 7–9 months
  { key: "sits_without_support",label: "Sits without support",          ageMonths: 7,  ageRangeLabel: "7 months",  category: "motor",    emoji: "🧘" },
  { key: "babbles",             label: "Babbles (mama/dada sounds)",    ageMonths: 8,  ageRangeLabel: "8 months",  category: "language", emoji: "👶" },
  { key: "object_permanence",   label: "Understands object permanence", ageMonths: 9,  ageRangeLabel: "9 months",  category: "cognitive",emoji: "🎭" },
  // 9–12 months
  { key: "crawls",              label: "Crawls",                        ageMonths: 9,  ageRangeLabel: "9 months",  category: "motor",    emoji: "🐛" },
  { key: "pulls_to_stand",      label: "Pulls to standing",             ageMonths: 10, ageRangeLabel: "10 months", category: "motor",    emoji: "🏋️" },
  { key: "pincer_grasp",        label: "Pincer grasp (finger + thumb)", ageMonths: 10, ageRangeLabel: "10 months", category: "motor",    emoji: "🤏" },
  { key: "waves_bye",           label: "Waves bye-bye",                 ageMonths: 10, ageRangeLabel: "10 months", category: "social",   emoji: "👋" },
  { key: "first_word",          label: "First real word",               ageMonths: 12, ageRangeLabel: "12 months", category: "language", emoji: "💬" },
  // 12–18 months
  { key: "walks",               label: "Walks independently",           ageMonths: 12, ageRangeLabel: "12 months", category: "motor",    emoji: "🚶" },
  { key: "uses_cup",            label: "Drinks from cup",               ageMonths: 12, ageRangeLabel: "12 months", category: "motor",    emoji: "🥤" },
  { key: "points_to_things",    label: "Points to show interest",       ageMonths: 14, ageRangeLabel: "14 months", category: "language", emoji: "👆" },
  { key: "ten_words",           label: "10+ words",                     ageMonths: 18, ageRangeLabel: "18 months", category: "language", emoji: "🗨️" },
  // 18–24 months
  { key: "runs",                label: "Runs",                          ageMonths: 18, ageRangeLabel: "18 months", category: "motor",    emoji: "🏃" },
  { key: "pretend_play",        label: "Pretend play (feeds doll etc)", ageMonths: 18, ageRangeLabel: "18 months", category: "cognitive",emoji: "🎭" },
  { key: "two_word_phrases",    label: "Two-word phrases",              ageMonths: 24, ageRangeLabel: "24 months", category: "language", emoji: "💭" },
];