{
  "version": "1.0",
  "tiers": [
    {
      "tier": 1,
      "techs": [
        { "id": "alliance_storage_1",    "name": "Expanded Warehouse I",   "desc": "Increase alliance warehouse cap by 10,000 per resource.", "cost": {"credits":5000,"metal":2000},  "effect": {"warehouseCap":10000},        "prereq": [],                    "icon": "fa-warehouse",  "maxLevel": 3 },
        { "id": "alliance_xp_1",         "name": "Shared Knowledge I",     "desc": "+5% XP for all members.",                                 "cost": {"credits":8000,"crystal":500},  "effect": {"memberXpBonus":0.05},        "prereq": [],                    "icon": "fa-graduation-cap", "maxLevel": 3 },
        { "id": "alliance_credits_1",    "name": "Trade Network I",        "desc": "Reduce market listing fee by 0.5% for all members.",       "cost": {"credits":6000,"gas":1000},     "effect": {"marketFeeReduction":0.005},  "prereq": [],                    "icon": "fa-coins",      "maxLevel": 2 }
      ]
    },
    {
      "tier": 2,
      "techs": [
        { "id": "alliance_storage_2",    "name": "Expanded Warehouse II",  "desc": "Increase warehouse cap by an additional 25,000.",          "cost": {"credits":15000,"metal":8000},  "effect": {"warehouseCap":25000},        "prereq": ["alliance_storage_1"], "icon": "fa-warehouse",  "maxLevel": 1 },
        { "id": "alliance_craft_1",      "name": "Collective Crafting",    "desc": "All members gain -10% craft time.",                        "cost": {"credits":12000,"crystal":1500},"effect": {"craftTimeReduction":0.10},   "prereq": ["alliance_xp_1"],     "icon": "fa-hammer",     "maxLevel": 2 },
        { "id": "alliance_defense_1",    "name": "Defensive Grid I",       "desc": "+10% PvP defense for all members.",                        "cost": {"credits":10000,"metal":5000},  "effect": {"pvpDefenseBonus":0.10},      "prereq": ["alliance_credits_1"],"icon": "fa-shield-alt", "maxLevel": 3 }
      ]
    },
    {
      "tier": 3,
      "techs": [
        { "id": "alliance_dm_1",         "name": "Void Tap",               "desc": "+15% dark matter production for all members.",             "cost": {"credits":25000,"darkMatter":50},"effect": {"darkMatterBonus":0.15},     "prereq": ["alliance_storage_2","alliance_craft_1"], "icon": "fa-atom",    "maxLevel": 1 },
        { "id": "alliance_fleet_1",      "name": "Fleet Coordination",     "desc": "+20% fleet mission rewards for all members.",              "cost": {"credits":20000,"gas":5000},    "effect": {"fleetRewardBonus":0.20},     "prereq": ["alliance_defense_1"],"icon": "fa-fighter-jet","maxLevel": 2 }
      ]
    }
  ]
}