diff --git a/.gitignore b/.gitignore
index ed8ebf5..7adeb7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,7 @@
-__pycache__
\ No newline at end of file
+.vscode
+__pycache__
+venv
+.venv
+webapp/data/orders.json
+orders.json
+orders*.json
\ No newline at end of file
diff --git a/data/orders.json b/data/orders.json
deleted file mode 100644
index 993368d..0000000
--- a/data/orders.json
+++ /dev/null
@@ -1,532 +0,0 @@
-[
-  {
-    "id": "b94528cb-ccf5-41d3-af05-dbd4a75b758e",
-    "structure": "Athanor",
-    "quantity": 1,
-    "me": 0,
-    "status": "done",
-    "created_at": "2025-08-21T16:02:00.451895+00:00",
-    "done_at": "2025-08-21T16:02:20.363756+00:00",
-    "system": "Jita",
-    "industry_structure": "Station",
-    "industry_rig": "None",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None"
-  },
-  {
-    "id": "e0c631c3-0a64-44ac-a64a-cc0647b2a2b9",
-    "structure": "Raitaru",
-    "quantity": 6,
-    "me": 4,
-    "status": "done",
-    "created_at": "2025-08-21T16:02:17.240266+00:00",
-    "done_at": "2025-08-21T16:02:21.570702+00:00",
-    "system": "Jita",
-    "industry_structure": "Station",
-    "industry_rig": "None",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None"
-  },
-  {
-    "id": "0bdf2545-b129-4856-bcd8-23837c4a04bf",
-    "structure": "Athanor",
-    "quantity": 5,
-    "me": 10,
-    "notes": "Test Auftrag",
-    "status": "done",
-    "created_at": "2025-08-21T16:13:36.220731+00:00",
-    "done_at": "2025-08-21T16:13:42.494046+00:00",
-    "system": "Jita",
-    "industry_structure": "Station",
-    "industry_rig": "None",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None"
-  },
-  {
-    "id": "09bed2df-89a0-475a-a0bb-3e942f594e11",
-    "structure": "Raitaru",
-    "quantity": 2,
-    "me": 3,
-    "notes": "",
-    "status": "done",
-    "created_at": "2025-08-21T16:22:08.029669+00:00",
-    "done_at": "2025-08-21T17:27:58.230171+00:00",
-    "system": "Jita",
-    "industry_structure": "Station",
-    "industry_rig": "None",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None"
-  },
-  {
-    "id": "32aea266-0f57-4101-b17e-051cca285381",
-    "structure": "Astrahus",
-    "quantity": 6,
-    "me": 0,
-    "notes": "",
-    "status": "done",
-    "created_at": "2025-08-21T17:28:04.199917+00:00",
-    "done_at": "2025-08-21T19:56:26.687066+00:00",
-    "system": "Jita",
-    "industry_structure": "Station",
-    "industry_rig": "None",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None"
-  },
-  {
-    "id": "38c32e75-ca24-463f-924c-665731736541",
-    "structure": "Athanor",
-    "quantity": 2,
-    "me": 6,
-    "notes": "Test",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Tatara",
-    "reaction_rig": "T1",
-    "status": "done",
-    "created_at": "2025-08-21T19:56:21.284564+00:00",
-    "done_at": "2025-08-22T07:54:33+0100",
-    "cookbook": {
-      "error": 0,
-      "status": 200,
-      "message": {
-        "materialCost": 1469368496.29,
-        "jobCost": 450873981.87,
-        "additionalCost": 0,
-        "totalCost": 1920242478.16,
-        "producedQuantity": 2,
-        "buildCostPerUnit": 960121239.08,
-        "excessMaterialsValue": 0,
-        "blueprintTypeId": 36977,
-        "blueprintName": "Athanor Blueprint"
-      }
-    },
-    "last_updated": "2025-08-22T07:33:15+0100",
-    "materials": {
-      "materials": [
-        {
-          "type_id": 21959,
-          "name": "Structure Reprocessing Plant",
-          "quantity": 6.0,
-          "cost_per_unit": 84744021.74,
-          "cost": 508464130.44
-        },
-        {
-          "type_id": 36957,
-          "name": "Structure Acceleration Coils",
-          "quantity": 2.0,
-          "cost_per_unit": 152817857.14,
-          "cost": 305635714.28
-        },
-        {
-          "type_id": 36956,
-          "name": "Structure Electromagnetic Sensor",
-          "quantity": 2.0,
-          "cost_per_unit": 141638461.54,
-          "cost": 283276923.08
-        },
-        {
-          "type_id": 21951,
-          "name": "Structure Storage Bay",
-          "quantity": 2.0,
-          "cost_per_unit": 73250833.33,
-          "cost": 146501666.66
-        },
-        {
-          "type_id": 21949,
-          "name": "Structure Hangar Array",
-          "quantity": 2.0,
-          "cost_per_unit": 53526739.13,
-          "cost": 107053478.26
-        },
-        {
-          "type_id": 21947,
-          "name": "Structure Construction Parts",
-          "quantity": 2.0,
-          "cost_per_unit": 52829037.04,
-          "cost": 105658074.08
-        },
-        {
-          "type_id": 21961,
-          "name": "Structure Docking Bay",
-          "quantity": 2.0,
-          "cost_per_unit": 48298064.52,
-          "cost": 96596129.04
-        },
-        {
-          "type_id": 21957,
-          "name": "Structure Repair Facility",
-          "quantity": 2.0,
-          "cost_per_unit": 46331224.49,
-          "cost": 92662448.98
-        }
-      ]
-    }
-  },
-  {
-    "id": "6cbd23eaca8941319037b3ac14a4970e",
-    "status": "done",
-    "created_at": "2025-08-22T07:54:47+0100",
-    "structure": "Raitaru",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "T1",
-    "quantity": 1,
-    "me": 5,
-    "notes": "Test",
-    "blueprint_type_id": 36971,
-    "cookbook": {
-      "error": 0,
-      "status": 200,
-      "message": {
-        "materialCost": 494601665.69,
-        "jobCost": 169775434.21,
-        "additionalCost": 0,
-        "totalCost": 664377099.9,
-        "producedQuantity": 1,
-        "buildCostPerUnit": 664377099.9,
-        "excessMaterialsValue": 0,
-        "blueprintTypeId": 36971,
-        "blueprintName": "Raitaru Blueprint"
-      }
-    },
-    "last_updated": "2025-08-22T07:59:54+0100",
-    "materials": {
-      "materials": [
-        {
-          "type_id": 21955,
-          "name": "Structure Factory",
-          "quantity": 1.0,
-          "cost_per_unit": 106032424.24,
-          "cost": 106032424.24
-        },
-        {
-          "type_id": 21959,
-          "name": "Structure Reprocessing Plant",
-          "quantity": 1.0,
-          "cost_per_unit": 84744021.74,
-          "cost": 84744021.74
-        },
-        {
-          "type_id": 21951,
-          "name": "Structure Storage Bay",
-          "quantity": 1.0,
-          "cost_per_unit": 73250833.33,
-          "cost": 73250833.33
-        },
-        {
-          "type_id": 21953,
-          "name": "Structure Laboratory",
-          "quantity": 1.0,
-          "cost_per_unit": 71164821.43,
-          "cost": 71164821.43
-        },
-        {
-          "type_id": 21967,
-          "name": "Structure Office Center",
-          "quantity": 1.0,
-          "cost_per_unit": 67570149.25,
-          "cost": 67570149.25
-        },
-        {
-          "type_id": 21949,
-          "name": "Structure Hangar Array",
-          "quantity": 1.0,
-          "cost_per_unit": 53526739.13,
-          "cost": 53526739.13
-        },
-        {
-          "type_id": 21947,
-          "name": "Structure Construction Parts",
-          "quantity": 1.0,
-          "cost_per_unit": 52829037.04,
-          "cost": 52829037.04
-        },
-        {
-          "type_id": 21961,
-          "name": "Structure Docking Bay",
-          "quantity": 1.0,
-          "cost_per_unit": 48298064.52,
-          "cost": 48298064.52
-        },
-        {
-          "type_id": 21957,
-          "name": "Structure Repair Facility",
-          "quantity": 1.0,
-          "cost_per_unit": 46331224.49,
-          "cost": 46331224.49
-        }
-      ]
-    },
-    "done_at": "2025-08-22T08:00:14+0100"
-  },
-  {
-    "id": "e4661b4a72064437a7f33ced2d446cde",
-    "status": "done",
-    "created_at": "2025-08-22T08:00:05+0100",
-    "structure": "Athanor",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "T1",
-    "quantity": 1,
-    "me": 0,
-    "notes": "",
-    "blueprint_type_id": 36977,
-    "done_at": "2025-08-22T08:00:15+0100"
-  },
-  {
-    "id": "a453ec6587c44d8ebdbb5156c58c9ec7",
-    "status": "done",
-    "created_at": "2025-08-22T08:15:52+0100",
-    "structure": "Keepstar",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "T1",
-    "quantity": 1,
-    "me": 10,
-    "notes": "",
-    "blueprint_type_id": 36968,
-    "cookbook": {
-      "error": 0,
-      "status": 200,
-      "message": {
-        "materialCost": 156812981803.45,
-        "jobCost": 74872180070.6,
-        "additionalCost": 0,
-        "totalCost": 231685161874.05,
-        "producedQuantity": 1,
-        "buildCostPerUnit": 231685161874.05,
-        "excessMaterialsValue": 0,
-        "blueprintTypeId": 36968,
-        "blueprintName": "Keepstar Blueprint"
-      }
-    },
-    "last_updated": "2025-08-22T08:37:05+0100",
-    "materials": {
-      "materials": [
-        {
-          "type_id": 21963,
-          "name": "Structure Market Network",
-          "quantity": 713.0,
-          "cost_per_unit": 166346666.67,
-          "cost": 118605173335.71
-        },
-        {
-          "type_id": 21951,
-          "name": "Structure Storage Bay",
-          "quantity": 179.0,
-          "cost_per_unit": 73250833.33,
-          "cost": 13111899166.07
-        },
-        {
-          "type_id": 21967,
-          "name": "Structure Office Center",
-          "quantity": 179.0,
-          "cost_per_unit": 67570149.25,
-          "cost": 12095056715.75
-        },
-        {
-          "type_id": 21949,
-          "name": "Structure Hangar Array",
-          "quantity": 179.0,
-          "cost_per_unit": 53526739.13,
-          "cost": 9581286304.27
-        },
-        {
-          "type_id": 21947,
-          "name": "Structure Construction Parts",
-          "quantity": 179.0,
-          "cost_per_unit": 52829037.04,
-          "cost": 9456397630.16
-        },
-        {
-          "type_id": 21965,
-          "name": "Structure Medical Center",
-          "quantity": 179.0,
-          "cost_per_unit": 50834772.73,
-          "cost": 9099424318.67
-        },
-        {
-          "type_id": 21961,
-          "name": "Structure Docking Bay",
-          "quantity": 179.0,
-          "cost_per_unit": 48298064.52,
-          "cost": 8645353549.08
-        },
-        {
-          "type_id": 21957,
-          "name": "Structure Repair Facility",
-          "quantity": 179.0,
-          "cost_per_unit": 46331224.49,
-          "cost": 8293289183.71
-        },
-        {
-          "type_id": 21955,
-          "name": "Structure Factory",
-          "quantity": 72.0,
-          "cost_per_unit": 106032424.24,
-          "cost": 7634334545.28
-        },
-        {
-          "type_id": 36958,
-          "name": "Structure Advertisement Nexus",
-          "quantity": 72.0,
-          "cost_per_unit": 86114000.0,
-          "cost": 6200208000.0
-        },
-        {
-          "type_id": 21959,
-          "name": "Structure Reprocessing Plant",
-          "quantity": 72.0,
-          "cost_per_unit": 84744021.74,
-          "cost": 6101569565.28
-        },
-        {
-          "type_id": 21953,
-          "name": "Structure Laboratory",
-          "quantity": 72.0,
-          "cost_per_unit": 71164821.43,
-          "cost": 5123867142.96
-        },
-        {
-          "type_id": 36957,
-          "name": "Structure Acceleration Coils",
-          "quantity": 8.0,
-          "cost_per_unit": 152817857.14,
-          "cost": 1222542857.12
-        },
-        {
-          "type_id": 36956,
-          "name": "Structure Electromagnetic Sensor",
-          "quantity": 8.0,
-          "cost_per_unit": 141638461.54,
-          "cost": 1133107692.32
-        },
-        {
-          "type_id": 3810,
-          "name": "Marines",
-          "quantity": 891.0,
-          "cost_per_unit": 7474.2,
-          "cost": 6659512.2
-        },
-        {
-          "type_id": 13267,
-          "name": "Janitor",
-          "quantity": 223.0,
-          "cost_per_unit": 6525.04,
-          "cost": 1455083.92
-        },
-        {
-          "type_id": 21969,
-          "name": "Structure Mission Network",
-          "quantity": 8.0,
-          "cost_per_unit": 0.0,
-          "cost": 0.0
-        }
-      ]
-    },
-    "done_at": "2025-08-22T11:25:47+0100"
-  },
-  {
-    "id": "f14623326be343e790e769a0de50d43a",
-    "status": "done",
-    "created_at": "2025-08-22T09:45:25+0100",
-    "structure": "Athanor",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None",
-    "quantity": 1,
-    "me": 5,
-    "notes": "",
-    "blueprint_type_id": 36977,
-    "done_at": "2025-08-22T11:46:35+0100"
-  },
-  {
-    "id": "bfa32ea583ba44e58872ceb84518c546",
-    "status": "done",
-    "created_at": "2025-08-22T11:45:30+0100",
-    "structure": "Keepstar",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T2",
-    "reaction_structure": "Tatara",
-    "reaction_rig": "T2",
-    "quantity": 1,
-    "me": 6,
-    "notes": "Test",
-    "blueprint_type_id": 36968,
-    "done_at": "2025-08-22T11:46:27+0100"
-  },
-  {
-    "id": "63eedb769b854322a75606380954b748",
-    "status": "done",
-    "created_at": "2025-08-22T11:46:53+0100",
-    "structure": "Fortizar",
-    "system": "Amarr",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T2",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None",
-    "quantity": 1,
-    "me": 0,
-    "notes": "",
-    "blueprint_type_id": 36967,
-    "done_at": "2025-08-22T12:13:41+0100"
-  },
-  {
-    "id": "644be14fb305436ca035eaeea7d7a4e7",
-    "status": "done",
-    "created_at": "2025-08-22T11:47:47+0100",
-    "structure": "Raitaru",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None",
-    "quantity": 5,
-    "me": 0,
-    "notes": "",
-    "blueprint_type_id": 36971,
-    "done_at": "2025-08-22T12:13:43+0100"
-  },
-  {
-    "id": "6a1c0282910d4f9d95b0fac76438f725",
-    "status": "open",
-    "created_at": "2025-08-22T12:13:50+0100",
-    "structure": "Astrahus",
-    "system": "Jita",
-    "industry_structure": "Sotiyo",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None",
-    "quantity": 1,
-    "me": 5,
-    "notes": "",
-    "blueprint_type_id": 36966,
-    "cache": {
-      "materials": {
-        "error": 0,
-        "message": {
-          "additionalCost": 0,
-          "blueprintName": "Astrahus Blueprint",
-          "blueprintTypeId": 36966,
-          "buildCostPerUnit": 1180755487.44,
-          "excessMaterialsValue": 0,
-          "jobCost": 346965820.03,
-          "materialCost": 833789667.41,
-          "producedQuantity": 1,
-          "totalCost": 1180755487.44
-        },
-        "status": 200
-      }
-    }
-  }
-]
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 04d84e2..c2812a2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 Flask==3.1.2
 Requests==2.32.5
+tinydb==4.8.2
\ No newline at end of file
diff --git a/webapp/data/migrate.py b/webapp/data/migrate.py
new file mode 100644
index 0000000..b978821
--- /dev/null
+++ b/webapp/data/migrate.py
@@ -0,0 +1,59 @@
+import os, json
+from tinydb import TinyDB
+from tinydb.storages import Storage
+
+# Paths
+OLD_FILE = "orders.json"
+ARCHIVE_FILE = "orders_old.json"
+NEW_FILE = "orders_new.json"  # final TinyDB JSON file
+TABLE_NAME = "orders"
+
+
+class PrettyJSONStorage(Storage):
+    """Custom TinyDB storage that pretty-prints JSON."""
+    def __init__(self, path):
+        self.path = path
+
+    def read(self):
+        try:
+            with open(self.path, "r", encoding="utf-8") as f:
+                return json.load(f)
+        except FileNotFoundError:
+            return None
+
+    def write(self, data):
+        with open(self.path, "w", encoding="utf-8") as f:
+            json.dump(data, f, ensure_ascii=False, indent=2)
+
+
+def migrate():
+    if not os.path.isfile(OLD_FILE):
+        print("No old JSON file found. Nothing to migrate.")
+        return
+
+    # Load old orders
+    with open(OLD_FILE, "r", encoding="utf-8") as f:
+        orders = json.load(f) or []
+
+    if not orders:
+        print("No orders found in the old JSON.")
+        return
+    
+    print(orders)
+
+    # Open TinyDB and insert into table
+    db = TinyDB(NEW_FILE, storage=PrettyJSONStorage)
+    orders_table = db.table(TABLE_NAME)
+    for order in orders:
+        orders_table.insert(order)
+
+    # Rename old file to archive
+    os.rename(OLD_FILE, ARCHIVE_FILE)
+    os.rename(NEW_FILE, OLD_FILE)
+    print(f"Migrated {len(orders)} orders into table '{TABLE_NAME}'.")
+    print(f"Old JSON file renamed to '{ARCHIVE_FILE}'.")
+    print(f"New TinyDB JSON file is '{OLD_FILE}'.")
+
+
+if __name__ == "__main__":
+    migrate()
\ No newline at end of file
diff --git a/webapp/data/orders.json b/webapp/data/orders.json
index 412915e..74ef55c 100644
--- a/webapp/data/orders.json
+++ b/webapp/data/orders.json
@@ -1,1761 +1,1918 @@
-[
-  {
-    "id": "eeab3f230f204cef8acc13504daaf8e8",
-    "status": "archived",
-    "created_at": "2025-08-22T17:50:31+0100",
-    "structure": "Raitaru",
-    "system": "Jita",
-    "industry_structure": "Raitaru",
-    "industry_rig": "T1",
-    "reaction_structure": "Athanor",
-    "reaction_rig": "None",
-    "quantity": 5,
-    "me": 0,
-    "notes": "",
-    "blueprint_type_id": 36971,
-    "cookbook": {
-      "error": 0,
-      "message": {
-        "additionalCost": 0,
-        "blueprintName": "Raitaru Blueprint",
-        "blueprintTypeId": 36971,
-        "buildCostPerUnit": 670302746.9,
-        "excessMaterialsValue": 0,
-        "jobCost": 864588482.31,
-        "materialCost": 2486925252.2,
-        "producedQuantity": 5,
-        "totalCost": 3351513734.51
+{
+  "orders": {
+    "1": {
+      "id": "eeab3f230f204cef8acc13504daaf8e8",
+      "status": "archived",
+      "created_at": "2025-08-22T17:50:31+0100",
+      "structure": "Raitaru",
+      "system": "Jita",
+      "industry_structure": "Raitaru",
+      "industry_rig": "T1",
+      "reaction_structure": "Athanor",
+      "reaction_rig": "None",
+      "quantity": 5,
+      "me": 0,
+      "notes": "",
+      "blueprint_type_id": 36971,
+      "cookbook": {
+        "error": 0,
+        "message": {
+          "additionalCost": 0,
+          "blueprintName": "Raitaru Blueprint",
+          "blueprintTypeId": 36971,
+          "buildCostPerUnit": 670302746.9,
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+            "quantity": 179.0,
+            "cost_per_unit": 0.0,
+            "cost": 0.0
+          }
+        ]
+      }
     }
   }
-]
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/webapp/routes/archive.py b/webapp/routes/archive.py
index 2e18e22..e20fb33 100644
--- a/webapp/routes/archive.py
+++ b/webapp/routes/archive.py
@@ -2,18 +2,14 @@
 from __future__ import annotations
 import time
 from flask import Blueprint, render_template, redirect, url_for
-from webapp.storage.orders import load_orders, update_order
+from webapp.storage.orders import load_archived, mark_archived
 
 bp = Blueprint("archive", __name__)
 
 @bp.get("/archiv")
 def archive_index():
     """Zeigt ausschließlich Aufträge mit status == 'archived'."""
-    archived = [o for o in load_orders() if o.get("status") == "archived"]
-    archived.sort(
-        key=lambda o: (o.get("archived_at") or o.get("done_at") or o.get("created_at") or ""),
-        reverse=True,
-    )
+    archived = load_archived()
     return render_template("archive.html", archived_orders=archived)
 
 @bp.post("/archiv/add/<order_id>")
@@ -23,5 +19,5 @@ def archive_add(order_id: str):
     Danach BLEIBEN wir auf der Strukturen-Seite (kein Wechsel zur Archiv-Seite).
     """
     now = time.strftime("%Y-%m-%dT%H:%M:%S%z", time.gmtime())
-    update_order(order_id, {"status": "archived", "archived_at": now})
+    mark_archived(order_id)
     return redirect(url_for("structures.structures"))  # zurück zu /strukturen
diff --git a/webapp/routes/cookbook.py b/webapp/routes/cookbook.py
index c4a7b81..4ef35d2 100644
--- a/webapp/routes/cookbook.py
+++ b/webapp/routes/cookbook.py
@@ -10,17 +10,17 @@ from webapp.services.ccookbook import (
 )
 # Storage
 from webapp.storage.orders import (
-    load_orders, update_order,
-    cache_costs, cache_materials,
+    update_order, get_order_by_id,
+    cache_costs, cache_materials, load_pending
 )
 
 bp = Blueprint("cookbook", __name__, url_prefix="/api")
 
+# ----------------------------- Helpers ----------------------------------------
+
 def _now() -> str:
     return time.strftime("%Y-%m-%dT%H:%M:%S%z", time.gmtime())
 
-# ----------------------------- Helpers ----------------------------------------
-
 def _arg(name: str, default: str = "") -> str:
     v = request.args.get(name)
     return v if v is not None else default
@@ -31,12 +31,6 @@ def _to_int(s: str, default: int = 0) -> int:
     except Exception:
         return default
 
-def _order_by_id(order_id: str) -> Dict[str, Any] | None:
-    for o in load_orders():
-        if o.get("id") == order_id:
-            return o
-    return None
-
 # ----------------------------- Endpoints – Raw --------------------------------
 
 @bp.get("/cookbook/build_cost")
@@ -113,7 +107,7 @@ def api_cache(order_id: str):
 
 @bp.post("/order/<order_id>/refresh")
 def api_refresh_one(order_id: str):
-    o = _order_by_id(order_id)
+    o = get_order_by_id(order_id)
     if not o:
         return jsonify({"error": "order not found"}), 404
     bp_id = o.get("blueprint_type_id")
@@ -172,7 +166,7 @@ def api_refresh_one(order_id: str):
 
 @bp.post("/orders/refresh_all")
 def api_refresh_all():
-    orders = [o for o in load_orders() if o.get("status") == "open" and o.get("blueprint_type_id")]
+    orders = [o for o in load_pending() if o.get("blueprint_type_id")]
     done = 0
     for o in orders:
         try:
@@ -195,8 +189,8 @@ def api_open_costs():
     """
     items: List[Dict[str, Any]] = []
     total = 0.0
-    for o in load_orders():
-        if o.get("status") != "open" or not o.get("blueprint_type_id"):
+    for o in load_pending():
+        if not o.get("blueprint_type_id"):
             continue
 
         entry: Dict[str, Any] = {
@@ -258,8 +252,8 @@ def api_open_materials():
         if cost is not None:
             row["cost"] += float(cost or 0)
 
-    for o in load_orders():
-        if o.get("status") != "open" or not o.get("blueprint_type_id"):
+    for o in load_pending():
+        if not o.get("blueprint_type_id"):
             continue
 
         mats = o.get("materials")
diff --git a/webapp/routes/structures.py b/webapp/routes/structures.py
index e4fa106..1e82c74 100644
--- a/webapp/routes/structures.py
+++ b/webapp/routes/structures.py
@@ -3,7 +3,7 @@ import uuid, time
 from typing import List, Dict, Any
 from flask import Blueprint, render_template, request, redirect, url_for
 
-from webapp.storage.orders import load_orders, add_order, mark_done
+from webapp.storage.orders import load_pending,load_done, add_order, mark_done
 from webapp.services.blueprints import resolve_blueprint_id
 
 bp = Blueprint("structures", __name__)
@@ -16,12 +16,7 @@ REAC_STRUCTS= ["Athanor", "Tatara"]
 REAC_RIGS   = ["None", "T1", "T2"]
 
 def _split_orders() -> Dict[str, List[Dict[str, Any]]]:
-    orders = load_orders()
-    open_orders = [o for o in orders if o.get("status") == "open"]
-    done_orders = [o for o in orders if o.get("status") == "done"]
-    open_orders.sort(key=lambda o: o.get("created_at",""), reverse=True)
-    done_orders.sort(key=lambda o: o.get("done_at","") or "", reverse=True)
-    return {"open": open_orders, "done": done_orders}
+    return {"open": load_pending(), "done": load_done()}
 
 @bp.route("/strukturen", methods=["GET", "POST"])
 def structures():
diff --git a/webapp/storage/orders.py b/webapp/storage/orders.py
index 50f6464..aee2ad0 100644
--- a/webapp/storage/orders.py
+++ b/webapp/storage/orders.py
@@ -1,55 +1,117 @@
 from __future__ import annotations
 import os, json, time
 from typing import List, Dict, Any
-from flask import current_app
+from flask import current_app, g
+from tinydb import TinyDB, Query
+from tinydb.storages import Storage
 
 FILE_NAME = "orders.json"
 
-def _file_path() -> str:
-    return os.path.join(current_app.root_path, "data", FILE_NAME)
+PRODUCTION = 'dev'
+
+class PrettyJSONStorage(Storage):
+    """Custom TinyDB storage that pretty-prints JSON."""
+    def __init__(self, path):
+        self.path = path
+
+    def read(self):
+        try:
+            with open(self.path, "r", encoding="utf-8") as f:
+                return json.load(f)
+        except FileNotFoundError:
+            return None
+
+    def write(self, data):
+        with open(self.path, "w", encoding="utf-8") as f:
+            json.dump(data, f, ensure_ascii=False, indent=2)
+
+
+
+def get_db() -> TinyDB:
+    """
+    Return a persistent TinyDB instance per Flask app context.
+    Stored in `g` to avoid reopening the file multiple times.
+    """
+    if "orders_db" not in g:
+        db_path = os.path.join(current_app.root_path, "data", FILE_NAME)
+        if PRODUCTION == "dev":
+            g.orders_db = TinyDB(db_path, storage=PrettyJSONStorage )
+        else:
+            g.orders_db = TinyDB(db_path)
+    return g.orders_db
+
+
+def get_orders_table():
+    """Return the orders table."""
+    return get_db().table("orders")
 
 def load_orders() -> List[Dict[str, Any]]:
-    p = _file_path()
-    if not os.path.isfile(p): return []
-    try:
-        with open(p, "r", encoding="utf-8") as f:
-            return json.load(f) or []
-    except Exception:
-        return []
+    """Return all orders as a list of dicts."""
+    table = get_orders_table()
+    return table.all()
 
-def _save_orders(orders: List[Dict[str, Any]]) -> None:
-    p = _file_path()
-    os.makedirs(os.path.dirname(p), exist_ok=True)
-    with open(p, "w", encoding="utf-8") as f:
-        json.dump(orders, f, ensure_ascii=False, indent=2)
+def get_order_by_id(order_id: str) -> Dict[str, Any] | None:
+    """Return a single order by its ID, or None if not found."""
+    table = get_orders_table()
+    Order = Query()
+    result = table.get(Order.id == order_id)
+    return result
+
+def load_archived() -> List[Dict[str, Any]]:
+    """Return all archived orders, sorted by archived/done/created date descending."""
+    table = get_orders_table()
+    Order = Query()
+    archived = table.search(Order.status == "archived")
+
+    def sort_key(o: Dict[str, Any]) -> str:
+        return o.get("archived_at") or o.get("done_at") or o.get("created_at") or ""
+
+    archived.sort(key=sort_key, reverse=True)
+    return archived
+
+def load_pending() -> List[Dict[str, Any]]:
+    """Return all orders with status 'open', sorted by created_at descending."""
+    table = get_orders_table()
+    Order = Query()
+    pending = table.search(Order.status == "open")
+    pending.sort(key=lambda o: o.get("created_at", ""), reverse=True)
+    return pending
+
+
+def load_done() -> List[Dict[str, Any]]:
+    """Return all orders with status 'done', sorted by done_at descending."""
+    table = get_orders_table()
+    Order = Query()
+    done = table.search(Order.status == "done")
+    done.sort(key=lambda o: o.get("done_at") or "", reverse=True)
+    return done
 
 def add_order(order: Dict[str, Any]) -> None:
-    orders = load_orders()
-    orders.append(order)
-    _save_orders(orders)
+    table = get_orders_table()
+    table.insert(order)
+
 
 def mark_done(order_id: str) -> bool:
-    orders = load_orders()
-    changed = False
+    table = get_orders_table()
+    Order = Query()
     now = time.strftime("%Y-%m-%dT%H:%M:%S%z", time.gmtime())
-    for o in orders:
-        if o.get("id") == order_id and o.get("status") != "done":
-            o["status"] = "done"
-            o["done_at"] = now
-            changed = True
-    if changed: _save_orders(orders)
-    return changed
+    updated = table.update({"status": "done", "done_at": now}, Order.id == order_id)
+    return bool(updated)
+
+def mark_archived(order_id: str) -> bool:
+    """Mark an order as archived and set archived_at timestamp."""
+    now = time.strftime("%Y-%m-%dT%H:%M:%S%z", time.gmtime())
+    table = get_orders_table()
+    Order = Query()
+    updated = table.update({"status": "archived", "archived_at": now}, Order.id == order_id)
+    return bool(updated)
 
 def update_order(order_id: str, patch: Dict[str, Any]) -> bool:
-    orders = load_orders()
-    ok = False
-    for o in orders:
-        if o.get("id") == order_id:
-            o.update(patch)
-            ok = True
-            break
-    if ok: _save_orders(orders)
-    return ok
+    table = get_orders_table()
+    Order = Query()
+    updated = table.update(patch, Order.id == order_id)
+    return bool(updated)
+
 
 def cache_costs(order_id: str, costs: Dict[str, Any]) -> bool:
     now = time.strftime("%Y-%m-%dT%H:%M:%S%z", time.gmtime())
@@ -57,4 +119,4 @@ def cache_costs(order_id: str, costs: Dict[str, Any]) -> bool:
 
 def cache_materials(order_id: str, mats: Dict[str, Any]) -> bool:
     now = time.strftime("%Y-%m-%dT%H:%M:%S%z", time.gmtime())
-    return update_order(order_id, {"materials": mats, "last_updated": now})
+    return update_order(order_id, {"materials": mats, "last_updated": now})
\ No newline at end of file