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src/lib/game/data/loot-drops.ts

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+// ─── Loot Drop Definitions ─────────────────────────────────────────────────────
+
+import type { LootDrop } from '../types';
+
+export const LOOT_DROPS: Record<string, LootDrop> = {
+  // ─── Materials (used for crafting) ───
+  manaCrystalDust: {
+    id: 'manaCrystalDust',
+    name: 'Mana Crystal Dust',
+    rarity: 'common',
+    type: 'material',
+    minFloor: 1,
+    dropChance: 0.15,
+  },
+  arcaneShard: {
+    id: 'arcaneShard',
+    name: 'Arcane Shard',
+    rarity: 'uncommon',
+    type: 'material',
+    minFloor: 10,
+    dropChance: 0.10,
+  },
+  elementalCore: {
+    id: 'elementalCore',
+    name: 'Elemental Core',
+    rarity: 'rare',
+    type: 'material',
+    minFloor: 25,
+    dropChance: 0.08,
+  },
+  voidEssence: {
+    id: 'voidEssence',
+    name: 'Void Essence',
+    rarity: 'epic',
+    type: 'material',
+    minFloor: 50,
+    dropChance: 0.05,
+    guardianOnly: true,
+  },
+  celestialFragment: {
+    id: 'celestialFragment',
+    name: 'Celestial Fragment',
+    rarity: 'legendary',
+    type: 'material',
+    minFloor: 75,
+    dropChance: 0.02,
+    guardianOnly: true,
+  },
+
+  // ─── Elemental Essence (grants elemental mana) ───
+  fireEssenceDrop: {
+    id: 'fireEssenceDrop',
+    name: 'Fire Essence',
+    rarity: 'uncommon',
+    type: 'essence',
+    minFloor: 5,
+    dropChance: 0.12,
+    amount: { min: 5, max: 15 },
+  },
+  waterEssenceDrop: {
+    id: 'waterEssenceDrop',
+    name: 'Water Essence',
+    rarity: 'uncommon',
+    type: 'essence',
+    minFloor: 5,
+    dropChance: 0.12,
+    amount: { min: 5, max: 15 },
+  },
+  airEssenceDrop: {
+    id: 'airEssenceDrop',
+    name: 'Air Essence',
+    rarity: 'uncommon',
+    type: 'essence',
+    minFloor: 5,
+    dropChance: 0.12,
+    amount: { min: 5, max: 15 },
+  },
+  earthEssenceDrop: {
+    id: 'earthEssenceDrop',
+    name: 'Earth Essence',
+    rarity: 'uncommon',
+    type: 'essence',
+    minFloor: 5,
+    dropChance: 0.12,
+    amount: { min: 5, max: 15 },
+  },
+  lightEssenceDrop: {
+    id: 'lightEssenceDrop',
+    name: 'Light Essence',
+    rarity: 'rare',
+    type: 'essence',
+    minFloor: 20,
+    dropChance: 0.08,
+    amount: { min: 3, max: 10 },
+  },
+  darkEssenceDrop: {
+    id: 'darkEssenceDrop',
+    name: 'Dark Essence',
+    rarity: 'rare',
+    type: 'essence',
+    minFloor: 20,
+    dropChance: 0.08,
+    amount: { min: 3, max: 10 },
+  },
+  lifeEssenceDrop: {
+    id: 'lifeEssenceDrop',
+    name: 'Life Essence',
+    rarity: 'epic',
+    type: 'essence',
+    minFloor: 40,
+    dropChance: 0.05,
+    amount: { min: 2, max: 8 },
+  },
+  deathEssenceDrop: {
+    id: 'deathEssenceDrop',
+    name: 'Death Essence',
+    rarity: 'epic',
+    type: 'essence',
+    minFloor: 40,
+    dropChance: 0.05,
+    amount: { min: 2, max: 8 },
+  },
+
+  // ─── Raw Mana Drops ───
+  manaOrb: {
+    id: 'manaOrb',
+    name: 'Mana Orb',
+    rarity: 'common',
+    type: 'gold', // Uses gold type but gives raw mana
+    minFloor: 1,
+    dropChance: 0.20,
+    amount: { min: 10, max: 50 },
+  },
+  greaterManaOrb: {
+    id: 'greaterManaOrb',
+    name: 'Greater Mana Orb',
+    rarity: 'uncommon',
+    type: 'gold',
+    minFloor: 15,
+    dropChance: 0.10,
+    amount: { min: 50, max: 150 },
+  },
+  supremeManaOrb: {
+    id: 'supremeManaOrb',
+    name: 'Supreme Mana Orb',
+    rarity: 'rare',
+    type: 'gold',
+    minFloor: 35,
+    dropChance: 0.05,
+    amount: { min: 100, max: 500 },
+  },
+
+  // ─── Equipment Blueprints ───
+  staffBlueprint: {
+    id: 'staffBlueprint',
+    name: 'Staff Blueprint',
+    rarity: 'uncommon',
+    type: 'blueprint',
+    minFloor: 10,
+    dropChance: 0.03,
+  },
+  wandBlueprint: {
+    id: 'wandBlueprint',
+    name: 'Wand Blueprint',
+    rarity: 'rare',
+    type: 'blueprint',
+    minFloor: 20,
+    dropChance: 0.02,
+  },
+  robeBlueprint: {
+    id: 'robeBlueprint',
+    name: 'Mage Robe Blueprint',
+    rarity: 'rare',
+    type: 'blueprint',
+    minFloor: 25,
+    dropChance: 0.02,
+  },
+  artifactBlueprint: {
+    id: 'artifactBlueprint',
+    name: 'Artifact Blueprint',
+    rarity: 'legendary',
+    type: 'blueprint',
+    minFloor: 60,
+    dropChance: 0.01,
+    guardianOnly: true,
+  },
+};
+
+// Rarity colors for UI
+export const RARITY_COLORS: Record<string, { color: string; glow: string }> = {
+  common: { color: '#9CA3AF', glow: '#9CA3AF40' },
+  uncommon: { color: '#22C55E', glow: '#22C55E40' },
+  rare: { color: '#3B82F6', glow: '#3B82F640' },
+  epic: { color: '#A855F7', glow: '#A855F740' },
+  legendary: { color: '#F59E0B', glow: '#F59E0B60' },
+};
+
+// Get loot drops available at a given floor
+export function getAvailableDrops(floor: number, isGuardian: boolean): LootDrop[] {
+  return Object.values(LOOT_DROPS).filter(drop => {
+    if (drop.minFloor > floor) return false;
+    if (drop.guardianOnly && !isGuardian) return false;
+    return true;
+  });
+}
+
+// Roll for loot drops
+export function rollLootDrops(
+  floor: number,
+  isGuardian: boolean,
+  luckBonus: number = 0
+): Array<{ drop: LootDrop; amount: number }> {
+  const available = getAvailableDrops(floor, isGuardian);
+  const drops: Array<{ drop: LootDrop; amount: number }> = [];
+
+  for (const drop of available) {
+    // Calculate adjusted drop chance
+    let chance = drop.dropChance;
+    chance *= (1 + luckBonus); // Apply luck bonus
+    
+    // Guardian floors have 2x drop rate
+    if (isGuardian) chance *= 2;
+    
+    // Cap at 50% for any single drop
+    chance = Math.min(0.5, chance);
+
+    if (Math.random() < chance) {
+      let amount = 1;
+      
+      // For gold/essence types, roll amount
+      if (drop.amount) {
+        amount = Math.floor(
+          Math.random() * (drop.amount.max - drop.amount.min + 1) + drop.amount.min
+        );
+      }
+      
+      drops.push({ drop, amount });
+    }
+  }
+
+  return drops;
+}