diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c839b8e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+# Dependencies
+node_modules
+
+# Environment / secrets
+.env
+
+# OS / editor files
+.DS_Store
diff --git a/app.js b/app.js
index fb4e22f..a8651a8 100644
--- a/app.js
+++ b/app.js
@@ -60,6 +60,7 @@
 
   const persistKey = "devis-generator:v1";
   const savedListKey = "devis-generator:saved:v1";
+  const globalSavesEndpoint = "/api/saves";
   const save = () => {
     try {
       localStorage.setItem(persistKey, JSON.stringify(state));
@@ -85,6 +86,35 @@
       localStorage.setItem(savedListKey, JSON.stringify(arr));
     } catch {}
   };
+  const canUseGlobalSaves = () =>
+    typeof fetch === "function" && (location?.protocol || "") !== "file:";
+  const fetchGlobalSaves = async () => {
+    if (!canUseGlobalSaves()) throw new Error("Sauvegardes globales indisponibles");
+    const res = await fetch(globalSavesEndpoint, { credentials: "same-origin" });
+    if (!res.ok) throw new Error("HTTP " + res.status);
+    const json = await res.json();
+    if (!Array.isArray(json)) throw new Error("Réponse inattendue");
+    return json;
+  };
+  const pushGlobalSave = async (entry) => {
+    if (!canUseGlobalSaves()) throw new Error("Sauvegardes globales indisponibles");
+    const res = await fetch(globalSavesEndpoint, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      credentials: "same-origin",
+      body: JSON.stringify(entry),
+    });
+    if (!res.ok) throw new Error("HTTP " + res.status);
+    return res.json();
+  };
+  const deleteGlobalSave = async (id) => {
+    if (!canUseGlobalSaves()) throw new Error("Sauvegardes globales indisponibles");
+    const res = await fetch(`${globalSavesEndpoint}/${encodeURIComponent(id)}`, {
+      method: "DELETE",
+      credentials: "same-origin",
+    });
+    if (!res.ok) throw new Error("HTTP " + res.status);
+  };
   const computeQuickTotal = (data) => {
     const items = Array.isArray(data.items) ? data.items : [];
     const subtotal = items.reduce(
@@ -109,7 +139,7 @@
       num || [client, date].filter(Boolean).join(" - ") || "Devis sans titre"
     );
   };
-  const saveCurrentQuote = () => {
+  const saveCurrentQuote = async () => {
     const data = buildExportJson();
     const input = prompt("Nom du devis", buildDefaultSaveTitle());
     if (input === null) return; // Annulé => ne rien faire
@@ -126,14 +156,43 @@
     const list = getSavedList();
     list.unshift(entry);
     setSavedList(list);
-    alert("Devis enregistré.");
+    let savedGlobally = false;
+    try {
+      if (canUseGlobalSaves()) {
+        const saved = await pushGlobalSave(entry);
+        if (saved && typeof saved === "object") {
+          const cur = getSavedList();
+          cur[0] = saved; // synchroniser id/horodatage renvoyés
+          setSavedList(cur);
+        }
+        savedGlobally = true;
+      }
+    } catch (e) {
+      console.warn("Sauvegarde globale impossible:", e);
+    }
+    alert(
+      savedGlobally
+        ? "Devis enregistré pour tout le monde (et en local)."
+        : "Devis enregistré uniquement sur cet appareil."
+    );
   };
-  const openLibrary = () => {
+  const openLibrary = async () => {
     const modal = document.getElementById("libraryModal");
     const listEl = document.getElementById("libraryList");
     const emptyEl = document.getElementById("libraryEmpty");
     if (!modal || !listEl || !emptyEl) return;
-    const list = getSavedList();
+    listEl.innerHTML = `<div class="muted">Chargement...</div>`;
+    let list = [];
+    let usedGlobal = false;
+    if (canUseGlobalSaves()) {
+      try {
+        list = await fetchGlobalSaves();
+        usedGlobal = true;
+      } catch (e) {
+        console.warn("Lecture globale impossible, fallback local:", e);
+      }
+    }
+    if (!usedGlobal) list = getSavedList();
     listEl.innerHTML = "";
     if (!list.length) {
       emptyEl.style.display = "";
@@ -161,11 +220,23 @@
         const btnDel = document.createElement("button");
         btnDel.className = "btn btn-danger";
         btnDel.textContent = "Supprimer";
-        btnDel.addEventListener("click", () => {
+        btnDel.addEventListener("click", async () => {
           if (!confirm("Supprimer ce devis enregistré ?")) return;
-          const cur = getSavedList().filter((x) => x.id !== e.id);
-          setSavedList(cur);
-          openLibrary();
+          if (usedGlobal && canUseGlobalSaves()) {
+            try {
+              await deleteGlobalSave(e.id);
+            } catch (err) {
+              alert(
+                "Suppression impossible côté serveur: " +
+                  (err.message || err)
+              );
+              return;
+            }
+          } else {
+            const cur = getSavedList().filter((x) => x.id !== e.id);
+            setSavedList(cur);
+          }
+          await openLibrary();
         });
         row.appendChild(title);
         row.appendChild(price);
@@ -865,9 +936,17 @@
       window.print();
     });
     // Save current quote
-    $("#saveQuoteBtn")?.addEventListener("click", () => saveCurrentQuote());
+    $("#saveQuoteBtn")?.addEventListener("click", () =>
+      saveCurrentQuote().catch((e) =>
+        alert("Impossible d'enregistrer: " + (e.message || e))
+      )
+    );
     // Library open/close
-    $("#openLibraryBtn")?.addEventListener("click", () => openLibrary());
+    $("#openLibraryBtn")?.addEventListener("click", () =>
+      openLibrary().catch((e) =>
+        alert("Impossible d'ouvrir la bibliothèque: " + (e.message || e))
+      )
+    );
     $("#closeLibraryBtn")?.addEventListener("click", () => closeLibrary());
     document
       .querySelector("#libraryModal .modal-backdrop")
@@ -1113,6 +1192,9 @@
   };
 
   const loadFromJson = (obj) => {
+    if (obj && obj.data && typeof obj.data === "object") {
+      obj = obj.data;
+    }
     if (!obj || typeof obj !== "object") throw new Error("JSON invalide");
     // Merge top-level simple keys
     keysAllowed.forEach((k) => {
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..6755230
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,174 @@
+{
+  "name": "devis-generator",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "devis-generator",
+      "version": "1.0.0",
+      "dependencies": {
+        "dotenv": "^16.4.5",
+        "pg": "^8.12.0"
+      }
+    },
+    "node_modules/dotenv": {
+      "version": "16.6.1",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",
+      "integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
+    "node_modules/pg": {
+      "version": "8.16.3",
+      "resolved": "https://registry.npmjs.org/pg/-/pg-8.16.3.tgz",
+      "integrity": "sha512-enxc1h0jA/aq5oSDMvqyW3q89ra6XIIDZgCX9vkMrnz5DFTw/Ny3Li2lFQ+pt3L6MCgm/5o2o8HW9hiJji+xvw==",
+      "license": "MIT",
+      "dependencies": {
+        "pg-connection-string": "^2.9.1",
+        "pg-pool": "^3.10.1",
+        "pg-protocol": "^1.10.3",
+        "pg-types": "2.2.0",
+        "pgpass": "1.0.5"
+      },
+      "engines": {
+        "node": ">= 16.0.0"
+      },
+      "optionalDependencies": {
+        "pg-cloudflare": "^1.2.7"
+      },
+      "peerDependencies": {
+        "pg-native": ">=3.0.1"
+      },
+      "peerDependenciesMeta": {
+        "pg-native": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/pg-cloudflare": {
+      "version": "1.2.7",
+      "resolved": "https://registry.npmjs.org/pg-cloudflare/-/pg-cloudflare-1.2.7.tgz",
+      "integrity": "sha512-YgCtzMH0ptvZJslLM1ffsY4EuGaU0cx4XSdXLRFae8bPP4dS5xL1tNB3k2o/N64cHJpwU7dxKli/nZ2lUa5fLg==",
+      "license": "MIT",
+      "optional": true
+    },
+    "node_modules/pg-connection-string": {
+      "version": "2.9.1",
+      "resolved": "https://registry.npmjs.org/pg-connection-string/-/pg-connection-string-2.9.1.tgz",
+      "integrity": "sha512-nkc6NpDcvPVpZXxrreI/FOtX3XemeLl8E0qFr6F2Lrm/I8WOnaWNhIPK2Z7OHpw7gh5XJThi6j6ppgNoaT1w4w==",
+      "license": "MIT"
+    },
+    "node_modules/pg-int8": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/pg-int8/-/pg-int8-1.0.1.tgz",
+      "integrity": "sha512-WCtabS6t3c8SkpDBUlb1kjOs7l66xsGdKpIPZsg4wR+B3+u9UAum2odSsF9tnvxg80h4ZxLWMy4pRjOsFIqQpw==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
+    "node_modules/pg-pool": {
+      "version": "3.10.1",
+      "resolved": "https://registry.npmjs.org/pg-pool/-/pg-pool-3.10.1.tgz",
+      "integrity": "sha512-Tu8jMlcX+9d8+QVzKIvM/uJtp07PKr82IUOYEphaWcoBhIYkoHpLXN3qO59nAI11ripznDsEzEv8nUxBVWajGg==",
+      "license": "MIT",
+      "peerDependencies": {
+        "pg": ">=8.0"
+      }
+    },
+    "node_modules/pg-protocol": {
+      "version": "1.10.3",
+      "resolved": "https://registry.npmjs.org/pg-protocol/-/pg-protocol-1.10.3.tgz",
+      "integrity": "sha512-6DIBgBQaTKDJyxnXaLiLR8wBpQQcGWuAESkRBX/t6OwA8YsqP+iVSiond2EDy6Y/dsGk8rh/jtax3js5NeV7JQ==",
+      "license": "MIT"
+    },
+    "node_modules/pg-types": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/pg-types/-/pg-types-2.2.0.tgz",
+      "integrity": "sha512-qTAAlrEsl8s4OiEQY69wDvcMIdQN6wdz5ojQiOy6YRMuynxenON0O5oCpJI6lshc6scgAY8qvJ2On/p+CXY0GA==",
+      "license": "MIT",
+      "dependencies": {
+        "pg-int8": "1.0.1",
+        "postgres-array": "~2.0.0",
+        "postgres-bytea": "~1.0.0",
+        "postgres-date": "~1.0.4",
+        "postgres-interval": "^1.1.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/pgpass": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/pgpass/-/pgpass-1.0.5.tgz",
+      "integrity": "sha512-FdW9r/jQZhSeohs1Z3sI1yxFQNFvMcnmfuj4WBMUTxOrAyLMaTcE1aAMBiTlbMNaXvBCQuVi0R7hd8udDSP7ug==",
+      "license": "MIT",
+      "dependencies": {
+        "split2": "^4.1.0"
+      }
+    },
+    "node_modules/postgres-array": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/postgres-array/-/postgres-array-2.0.0.tgz",
+      "integrity": "sha512-VpZrUqU5A69eQyW2c5CA1jtLecCsN2U/bD6VilrFDWq5+5UIEVO7nazS3TEcHf1zuPYO/sqGvUvW62g86RXZuA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/postgres-bytea": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/postgres-bytea/-/postgres-bytea-1.0.0.tgz",
+      "integrity": "sha512-xy3pmLuQqRBZBXDULy7KbaitYqLcmxigw14Q5sj8QBVLqEwXfeybIKVWiqAXTlcvdvb0+xkOtDbfQMOf4lST1w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/postgres-date": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/postgres-date/-/postgres-date-1.0.7.tgz",
+      "integrity": "sha512-suDmjLVQg78nMK2UZ454hAG+OAW+HQPZ6n++TNDUX+L0+uUlLywnoxJKDou51Zm+zTCjrCl0Nq6J9C5hP9vK/Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/postgres-interval": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/postgres-interval/-/postgres-interval-1.2.0.tgz",
+      "integrity": "sha512-9ZhXKM/rw350N1ovuWHbGxnGh/SNJ4cnxHiM0rxE4VN41wsg8P8zWn9hv/buK00RP4WvlOyr/RBDiptyxVbkZQ==",
+      "license": "MIT",
+      "dependencies": {
+        "xtend": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/split2": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/split2/-/split2-4.2.0.tgz",
+      "integrity": "sha512-UcjcJOWknrNkF6PLX83qcHM6KHgVKNkV62Y8a5uYDVv9ydGQVwAHMKqHdJje1VTWpljG0WYpCDhrCdAOYH4TWg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">= 10.x"
+      }
+    },
+    "node_modules/xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.4"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..523eb22
--- /dev/null
+++ b/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "devis-generator",
+  "version": "1.0.0",
+  "description": "Générateur de devis avec sauvegardes partagées via PostgreSQL",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "node server.js"
+  },
+  "dependencies": {
+    "dotenv": "^16.4.5",
+    "pg": "^8.12.0"
+  }
+}
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..9503359
--- /dev/null
+++ b/server.js
@@ -0,0 +1,249 @@
+#!/usr/bin/env node
+/**
+ * Serveur simple (Node HTTP) pour partager les devis via PostgreSQL.
+ * Routes:
+ *   GET    /api/saves        -> liste des devis
+ *   POST   /api/saves        -> ajoute un devis { name, data, number?, clientName?, date?, total? }
+ *   DELETE /api/saves/:id    -> supprime un devis
+ * Sert aussi les fichiers statiques du dossier courant.
+ */
+require("dotenv").config();
+const http = require("http");
+const fs = require("fs");
+const fsp = require("fs/promises");
+const path = require("path");
+const { Pool } = require("pg");
+
+const PORT = Number(process.env.PORT || 3000);
+const HOST = process.env.HOST || "0.0.0.0";
+const ROOT = __dirname;
+
+const pool = new Pool({
+  connectionString: process.env.DATABASE_URL,
+  host: process.env.PGHOST,
+  port: process.env.PGPORT ? Number(process.env.PGPORT) : undefined,
+  user: process.env.PGUSER,
+  password: process.env.PGPASSWORD,
+  database: process.env.PGDATABASE,
+  ssl:
+    process.env.PGSSL === "true" || process.env.PGSSLMODE === "require"
+      ? { rejectUnauthorized: false }
+      : undefined,
+});
+
+const MIME = {
+  ".html": "text/html; charset=utf-8",
+  ".js": "text/javascript; charset=utf-8",
+  ".css": "text/css; charset=utf-8",
+  ".json": "application/json; charset=utf-8",
+  ".png": "image/png",
+  ".jpg": "image/jpeg",
+  ".jpeg": "image/jpeg",
+  ".svg": "image/svg+xml",
+};
+
+const ensureSchema = async () => {
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS quotes (
+      id TEXT PRIMARY KEY,
+      name TEXT NOT NULL,
+      number TEXT,
+      client_name TEXT,
+      date TEXT,
+      total NUMERIC,
+      saved_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+      data JSONB NOT NULL
+    );
+  `);
+  await pool.query(`CREATE INDEX IF NOT EXISTS quotes_saved_at_idx ON quotes (saved_at DESC);`);
+};
+
+const readBodyJson = async (req) => {
+  const chunks = [];
+  for await (const chunk of req) {
+    chunks.push(chunk);
+    if (chunks.reduce((s, c) => s + c.length, 0) > 1e6) {
+      throw new Error("Payload trop volumineux");
+    }
+  }
+  if (!chunks.length) return null;
+  return JSON.parse(Buffer.concat(chunks).toString("utf8"));
+};
+
+const quickTotal = (data) => {
+  const items = Array.isArray(data?.items) ? data.items : [];
+  const subtotal = items.reduce((acc, it) => {
+    const qty = Number(it.days ?? it.qty ?? 0);
+    const price = Number(it.unitPrice ?? it.unit_price ?? 0);
+    return acc + qty * price;
+  }, 0);
+  const discountRate = Number(data?.discountRate || 0);
+  const vatRate = Number(data?.vatRate || 0);
+  const discount = subtotal * (discountRate / 100);
+  const base = Math.max(0, subtotal - discount);
+  const vat = base * (vatRate / 100);
+  return base + vat;
+};
+
+const sendJson = (res, status, payload) => {
+  res.writeHead(status, {
+    "Content-Type": "application/json; charset=utf-8",
+    "Access-Control-Allow-Origin": "*",
+    "Access-Control-Allow-Methods": "GET,POST,DELETE,OPTIONS",
+    "Access-Control-Allow-Headers": "Content-Type",
+  });
+  res.end(JSON.stringify(payload));
+};
+
+const notFound = (res) => {
+  res.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });
+  res.end("Not found");
+};
+
+const rowToEntry = (row) => ({
+  id: row.id,
+  name: row.name || "",
+  number: row.number || "",
+  clientName: row.client_name || "",
+  date: row.date || "",
+  total: Number(row.total || 0),
+  savedAt:
+    row.saved_at instanceof Date ? row.saved_at.toISOString() : row.saved_at,
+  data: row.data || {},
+});
+
+const handleApi = async (req, res, url) => {
+  if (req.method === "OPTIONS") {
+    res.writeHead(204, {
+      "Access-Control-Allow-Origin": "*",
+      "Access-Control-Allow-Methods": "GET,POST,DELETE,OPTIONS",
+      "Access-Control-Allow-Headers": "Content-Type",
+    });
+    res.end();
+    return true;
+  }
+
+  if (url.pathname === "/api/saves" && req.method === "GET") {
+    const { rows } = await pool.query(
+      "SELECT id, name, number, client_name, date, total, saved_at, data FROM quotes ORDER BY saved_at DESC;"
+    );
+    sendJson(res, 200, rows.map(rowToEntry));
+    return true;
+  }
+
+  if (url.pathname === "/api/saves" && req.method === "POST") {
+    try {
+      const body = await readBodyJson(req);
+      if (!body || typeof body !== "object") {
+        sendJson(res, 400, { error: "Corps vide" });
+        return true;
+      }
+      if (!body.data || typeof body.data !== "object") {
+        sendJson(res, 400, { error: "Champ 'data' manquant" });
+        return true;
+      }
+      const id =
+        body.id ||
+        Date.now().toString(36) + Math.random().toString(36).slice(2, 8);
+      const total = Number.isFinite(body.total)
+        ? Number(body.total)
+        : quickTotal(body.data);
+      const savedAt = new Date();
+      await pool.query(
+        `
+        INSERT INTO quotes (id, name, number, client_name, date, total, saved_at, data)
+        VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+        ON CONFLICT (id) DO UPDATE
+          SET name = EXCLUDED.name,
+              number = EXCLUDED.number,
+              client_name = EXCLUDED.client_name,
+              date = EXCLUDED.date,
+              total = EXCLUDED.total,
+              saved_at = EXCLUDED.saved_at,
+              data = EXCLUDED.data;
+      `,
+        [
+          id,
+          (body.name || "Devis sans titre").toString(),
+          (body.number || "").toString(),
+          (body.clientName || "").toString(),
+          (body.date || "").toString(),
+          total,
+          savedAt,
+          body.data,
+        ]
+      );
+      sendJson(res, 201, {
+        id,
+        name: body.name || "Devis sans titre",
+        number: body.number || "",
+        clientName: body.clientName || "",
+        date: body.date || "",
+        total,
+        savedAt: savedAt.toISOString(),
+        data: body.data,
+      });
+    } catch (e) {
+      console.error("POST /api/saves error:", e);
+      sendJson(res, 400, { error: e.message || "Erreur" });
+    }
+    return true;
+  }
+
+  if (url.pathname.startsWith("/api/saves/") && req.method === "DELETE") {
+    const id = url.pathname.split("/").pop();
+    await pool.query("DELETE FROM quotes WHERE id = $1;", [id]);
+    sendJson(res, 200, { ok: true });
+    return true;
+  }
+
+  return false;
+};
+
+const serveStatic = async (req, res, url) => {
+  let pathname = decodeURIComponent(url.pathname);
+  if (pathname === "/") pathname = "/index.html";
+  const filePath = path.join(ROOT, pathname);
+
+  if (!filePath.startsWith(ROOT)) {
+    notFound(res);
+    return;
+  }
+
+  try {
+    const stat = await fsp.stat(filePath);
+    if (stat.isDirectory()) {
+      notFound(res);
+      return;
+    }
+    const ext = path.extname(filePath);
+    const type = MIME[ext] || "application/octet-stream";
+    res.writeHead(200, { "Content-Type": type });
+    fs.createReadStream(filePath).pipe(res);
+  } catch {
+    notFound(res);
+  }
+};
+
+const start = async () => {
+  await ensureSchema();
+  const server = http.createServer(async (req, res) => {
+    const url = new URL(req.url, `http://${req.headers.host}`);
+    try {
+      const handled = await handleApi(req, res, url);
+      if (!handled) await serveStatic(req, res, url);
+    } catch (e) {
+      console.error("Erreur serveur:", e);
+      res.writeHead(500, { "Content-Type": "text/plain; charset=utf-8" });
+      res.end("Erreur serveur");
+    }
+  });
+  server.listen(PORT, HOST, () => {
+    console.log(`Serveur sur http://${HOST}:${PORT}`);
+  });
+};
+
+start().catch((e) => {
+  console.error("Impossible de démarrer:", e);
+  process.exit(1);
+});