diff --git a/server.js b/server.js
index 1a7e04b..72481bc 100644
--- a/server.js
+++ b/server.js
@@ -3,20 +3,15 @@ import cors from "cors";
 import bcrypt from "bcryptjs";
 import jwt from "jsonwebtoken";
 import pg from "pg";
-// import fetch from "node-fetch"; // YA NO ES NECESARIO EN NODE 20
 
 const { Pool } = pg;
 const app = express();
 
-// =========================
-// MIDDLEWARES (IMPORTANTE EL ORDEN)
-// =========================
-app.use(cors()); // <--- AÑADIDO: Habilita CORS para que tu web pueda conectarse
+// --- MIDDLEWARES ---
+app.use(cors());
 app.use(express.json());
 
-// =========================
-// ENV
-// =========================
+// --- ENV ---
 const {
   DATABASE_URL,
   JWT_SECRET,
@@ -26,33 +21,25 @@ const {
 } = process.env;
 
 if (!DATABASE_URL || !JWT_SECRET) {
-  console.error("❌ Faltan variables de entorno críticas (DATABASE_URL o JWT_SECRET)");
+  console.error("ERROR FATAL: Faltan DATABASE_URL o JWT_SECRET");
   process.exit(1);
 }
 
-// =========================
-// DB CONNECTION
-// =========================
+// --- DB ---
 const pool = new Pool({
   connectionString: DATABASE_URL,
   ssl: DATABASE_URL.includes("localhost") ? false : { rejectUnauthorized: false }
 });
 
-// =========================
-// RUTA DE SALUD (Health Check)
-// =========================
-// Esta ruta arregla el mensaje "Cannot GET /" y te confirma que la API vive.
+// --- RUTA HEALTH CHECK (Para evitar el 404/502) ---
 app.get("/", (req, res) => {
-  res.send("🚀 IntegraRepara API v1.0 - Funcionando correctamente");
+  res.status(200).send("IntegraRepara API Online");
 });
 
-// =========================
-// HELPERS
-// =========================
+// --- HELPERS ---
 function normalizePhone(phone) {
   let p = String(phone || "").trim().replace(/\s+/g, "").replace(/-/g, "");
   if (!p) return "";
-  // Lógica simple para España
   if (!p.startsWith("+") && /^[6789]\d{8}$/.test(p)) {
     return "+34" + p;
   }
@@ -71,182 +58,139 @@ function signToken(user) {
   );
 }
 
-// Middleware de autenticación
-function authMiddleware(req, res, next) {
-  const h = req.headers.authorization || "";
-  const token = h.startsWith("Bearer ") ? h.slice(7) : "";
-  if (!token) return res.status(401).json({ ok: false, error: "No token" });
-  try {
-    const payload = jwt.verify(token, JWT_SECRET);
-    req.user = payload;
-    next();
-  } catch {
-    return res.status(401).json({ ok: false, error: "Token inválido o expirado" });
-  }
-}
-
-// =========================
-// EVOLUTION API (WHATSAPP)
-// =========================
+// --- WHATSAPP ---
 async function sendWhatsAppCode(phone, code) {
   if (!EVOLUTION_BASE_URL || !EVOLUTION_API_KEY) {
-    console.warn("⚠️ Evolution API no configurada. Código (Log):", code);
-    return { ok: true, skipped: true }; 
+    console.log("Simulando envío WhatsApp (Faltan claves):", code);
+    return { ok: true };
   }
   try {
-    const url = `${EVOLUTION_BASE_URL.replace(/\/$/, "")}/message/sendText/${EVOLUTION_INSTANCE}`;
+    // Detectamos si la URL base termina en / o no
+    const baseUrl = EVOLUTION_BASE_URL.replace(/\/$/, "");
+    const url = `${baseUrl}/message/sendText/${EVOLUTION_INSTANCE}`;
+    
     const body = {
       number: phone.replace("+", ""), 
-      text: `🔐 Tu código de verificación IntegraRepara es: *${code}*\n\nNo lo compartas con nadie.`
+      text: `Tu código es: ${code}`
     };
-    
-    // Fetch nativo de Node (sin librería extra)
+
     const res = await fetch(url, {
       method: "POST",
-      headers: {
-        "Content-Type": "application/json",
-        "apikey": EVOLUTION_API_KEY
-      },
+      headers: { "Content-Type": "application/json", "apikey": EVOLUTION_API_KEY },
       body: JSON.stringify(body)
     });
     
-    const data = await res.json();
     if (!res.ok) {
-      console.error("❌ Error Evolution:", data);
-      return { ok: false };
+        const txt = await res.text();
+        console.error("Error Evolution:", txt);
+        return { ok: false };
     }
     return { ok: true };
-  } catch (error) {
-    console.error("❌ Error enviando WhatsApp:", error);
+  } catch (e) {
+    console.error("Error envío:", e);
     return { ok: false };
   }
 }
 
-// =========================
-// RUTAS DE AUTENTICACIÓN
-// =========================
+// --- RUTAS ---
 
-// 1. REGISTRO
+// Registro
 app.post("/auth/register", async (req, res) => {
   const client = await pool.connect();
   try {
     const { fullName, phone, address, dni, email, password } = req.body;
     const p = normalizePhone(phone);
-    if (!fullName || !p || !email || !password) {
-      return res.status(400).json({ ok: false, error: "Faltan datos" });
-    }
+    if (!fullName || !p || !email || !password) return res.status(400).json({error: "Faltan datos"});
+    
     const passwordHash = await bcrypt.hash(password, 10);
     
     await client.query('BEGIN');
-    // Verificamos si existe
-    const checkUser = await client.query("SELECT * FROM users WHERE email = $1 OR phone = $2", [email, p]);
+    
+    // Check usuario
+    const check = await client.query("SELECT * FROM users WHERE email=$1 OR phone=$2", [email, p]);
     let userId;
-    
-    if (checkUser.rowCount > 0) {
-      const existing = checkUser.rows[0];
-      if (existing.is_verified) {
-        await client.query('ROLLBACK');
-        return res.status(409).json({ ok: false, error: "El usuario ya existe y está verificado. Por favor inicia sesión." });
-      } else {
-        // Existe pero NO verificado: Actualizamos datos
-        await client.query(
-          `UPDATE users SET full_name=$1, address=$2, dni=$3, password_hash=$4 WHERE id=$5`,
-          [fullName, address, dni, passwordHash, existing.id]
-        );
-        userId = existing.id;
-      }
+
+    if (check.rowCount > 0) {
+        const u = check.rows[0];
+        if (u.is_verified) {
+            await client.query('ROLLBACK');
+            return res.status(409).json({error: "Usuario ya existe"});
+        }
+        // Actualizar existente no verificado
+        await client.query("UPDATE users SET full_name=$1, password_hash=$2 WHERE id=$3", [fullName, passwordHash, u.id]);
+        userId = u.id;
     } else {
-      // Nuevo usuario
-      const insert = await client.query(
-        `INSERT INTO users (full_name, phone, address, dni, email, password_hash) 
-         VALUES ($1, $2, $3, $4, $5, $6) RETURNING id`,
-        [fullName, p, address, dni, email, passwordHash]
-      );
-      userId = insert.rows[0].id;
+        // Nuevo
+        const ins = await client.query("INSERT INTO users (full_name, phone, address, dni, email, password_hash) VALUES ($1,$2,$3,$4,$5,$6) RETURNING id", [fullName, p, address, dni, email, passwordHash]);
+        userId = ins.rows[0].id;
     }
-    // Generar código
+
+    // Código
     const code = genCode6();
-    const codeHash = await bcrypt.hash(code, 10);
-    const expiresAt = new Date(Date.now() + 10 * 60 * 1000); // 10 min
+    const hash = await bcrypt.hash(code, 10);
+    const exp = new Date(Date.now() + 600000);
     
-    // Invalidar códigos anteriores e insertar nuevo
-    await client.query("DELETE FROM login_codes WHERE user_id = $1", [userId]);
-    await client.query(
-      `INSERT INTO login_codes (user_id, phone, code_hash, expires_at) VALUES ($1, $2, $3, $4)`,
-      [userId, p, codeHash, expiresAt]
-    );
+    await client.query("DELETE FROM login_codes WHERE user_id=$1", [userId]);
+    await client.query("INSERT INTO login_codes (user_id, phone, code_hash, expires_at) VALUES ($1,$2,$3,$4)", [userId, p, hash, exp]);
     
-    // Enviar WhatsApp
     await sendWhatsAppCode(p, code);
     await client.query('COMMIT');
-    res.json({ ok: true, phone: p, msg: "Código enviado" });
+    
+    res.json({ok: true, phone: p});
   } catch (e) {
     await client.query('ROLLBACK');
     console.error(e);
-    res.status(500).json({ ok: false, error: "Error interno del servidor" });
+    res.status(500).json({error: "Error servidor"});
   } finally {
     client.release();
   }
 });
 
-// 2. VERIFICACIÓN
+// Verificación
 app.post("/auth/verify", async (req, res) => {
-  try {
-    const { phone, code } = req.body;
-    const p = normalizePhone(phone);
-    // Buscar código válido
-    const codeQuery = await pool.query(
-      `SELECT lc.*, u.id as user_id, u.email, u.full_name, u.phone 
-       FROM login_codes lc
-       JOIN users u ON lc.user_id = u.id
-       WHERE lc.phone = $1 AND lc.consumed_at IS NULL AND lc.expires_at > NOW()
-       ORDER BY lc.created_at DESC LIMIT 1`,
-      [p]
-    );
-    if (codeQuery.rowCount === 0) {
-      return res.status(400).json({ ok: false, error: "Código inválido o expirado" });
+    try {
+        const { phone, code } = req.body;
+        const p = normalizePhone(phone);
+        
+        const q = await pool.query(`
+            SELECT lc.*, u.id as uid, u.email, u.phone 
+            FROM login_codes lc JOIN users u ON lc.user_id = u.id
+            WHERE lc.phone=$1 AND lc.consumed_at IS NULL AND lc.expires_at > NOW()
+            ORDER BY lc.created_at DESC LIMIT 1`, [p]);
+            
+        if (q.rowCount === 0) return res.status(400).json({error: "Código inválido"});
+        
+        const valid = await bcrypt.compare(String(code), q.rows[0].code_hash);
+        if (!valid) return res.status(400).json({error: "Código incorrecto"});
+        
+        await pool.query("UPDATE login_codes SET consumed_at=NOW() WHERE id=$1", [q.rows[0].id]);
+        await pool.query("UPDATE users SET is_verified=TRUE WHERE id=$1", [q.rows[0].uid]);
+        
+        const token = signToken({id: q.rows[0].uid, email: q.rows[0].email, phone: p});
+        res.json({ok: true, token});
+    } catch (e) {
+        console.error(e);
+        res.status(500).json({error: "Error verify"});
     }
-    const row = codeQuery.rows[0];
-    const valid = await bcrypt.compare(String(code), row.code_hash);
-    if (!valid) {
-      return res.status(400).json({ ok: false, error: "Código incorrecto" });
-    }
-    // Consumir código y verificar usuario
-    await pool.query("UPDATE login_codes SET consumed_at = NOW() WHERE id = $1", [row.id]);
-    await pool.query("UPDATE users SET is_verified = TRUE WHERE id = $1", [row.user_id]);
-    const user = { id: row.user_id, email: row.email, phone: row.phone };
-    const token = signToken(user);
-    res.json({ ok: true, token });
-  } catch (e) {
-    console.error(e);
-    res.status(500).json({ ok: false, error: "Error verificando código" });
-  }
 });
 
-// 3. LOGIN
+// Login
 app.post("/auth/login", async (req, res) => {
-  try {
-    const { email, password } = req.body;
-    const u = await pool.query("SELECT * FROM users WHERE email = $1", [email]);
-    if (u.rowCount === 0) return res.status(401).json({ ok: false, error: "Credenciales inválidas" });
-    const user = u.rows[0];
-    const match = await bcrypt.compare(password, user.password_hash);
-    if (!match) return res.status(401).json({ ok: false, error: "Credenciales inválidas" });
-    if (!user.is_verified) {
-      return res.status(403).json({ ok: false, error: "Cuenta no verificada." });
+    try {
+        const { email, password } = req.body;
+        const q = await pool.query("SELECT * FROM users WHERE email=$1", [email]);
+        if (q.rowCount === 0) return res.status(401).json({error: "Credenciales"});
+        
+        const u = q.rows[0];
+        const match = await bcrypt.compare(password, u.password_hash);
+        if (!match) return res.status(401).json({error: "Credenciales"});
+        if (!u.is_verified) return res.status(403).json({error: "No verificado"});
+        
+        res.json({ok: true, token: signToken(u)});
+    } catch(e) {
+        res.status(500).json({error: "Error login"});
     }
-    const token = signToken(user);
-    res.json({ ok: true, token });
-  } catch (e) {
-    res.status(500).json({ ok: false, error: "Error en login" });
-  }
-});
-
-// 4. DATOS PROTEGIDOS
-app.get("/services", authMiddleware, async (req, res) => {
-    const q = await pool.query("SELECT * FROM services WHERE user_id = $1 ORDER BY created_at DESC", [req.user.sub]);
-    res.json({ ok: true, services: q.rows });
 });
 
 const port = process.env.PORT || 3000;
-app.listen(port, () => console.log(`🚀 Server en puerto ${port}`));
\ No newline at end of file
+app.listen(port, "0.0.0.0", () => console.log(`🚀 Server OK en puerto ${port}`));
\ No newline at end of file