diff --git a/web-next/app/[locale]/login/LoginForm.tsx b/web-next/app/[locale]/login/LoginForm.tsx
new file mode 100644
index 0000000..d96cc6e
--- /dev/null
+++ b/web-next/app/[locale]/login/LoginForm.tsx
@@ -0,0 +1,94 @@
+'use client'
+
+import { useState } from 'react'
+import { useTranslations } from 'next-intl'
+import { useRouter } from '@/i18n/navigation'
+
+const ERROR_KEYS = ['invalidCredentials', 'missingFields', 'invalidRequest'] as const
+
+export function LoginForm() {
+  const t = useTranslations('Login')
+  const router = useRouter()
+  const [email, setEmail] = useState('')
+  const [password, setPassword] = useState('')
+  const [showPw, setShowPw] = useState(false)
+  const [busy, setBusy] = useState(false)
+  const [message, setMessage] = useState<{ ok: boolean; text: string } | null>(null)
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    if (busy) return
+    if (!email.trim() || !password) {
+      setMessage({ ok: false, text: t('missingFields') })
+      return
+    }
+    setBusy(true)
+    setMessage(null)
+    try {
+      const res = await fetch('/api/auth/login', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        credentials: 'same-origin',
+        body: JSON.stringify({ email: email.trim(), password }),
+      })
+      const data: { success?: boolean; needsSelection?: boolean; error?: string } = await res.json()
+      if (data.success) {
+        setMessage({ ok: true, text: t('success') })
+        router.push(data.needsSelection ? '/select-account' : '/account')
+      } else {
+        const key = (ERROR_KEYS as readonly string[]).includes(data.error ?? '') ? data.error! : 'genericError'
+        setMessage({ ok: false, text: t(key) })
+        setBusy(false)
+      }
+    } catch {
+      setMessage({ ok: false, text: t('genericError') })
+      setBusy(false)
+    }
+  }
+
+  return (
+    <div className="mx-auto max-w-sm text-center">
+      <form onSubmit={handleSubmit} className="space-y-3">
+        <input
+          type="email"
+          value={email}
+          onChange={(e) => setEmail(e.target.value)}
+          placeholder={t('email')}
+          autoFocus
+          required
+          className="w-full rounded border border-amber-900/60 bg-[#2c1e14] px-3 py-2"
+        />
+        <div className="relative">
+          <input
+            type={showPw ? 'text' : 'password'}
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            placeholder={t('password')}
+            maxLength={16}
+            required
+            className="w-full rounded border border-amber-900/60 bg-[#2c1e14] px-3 py-2 pr-10"
+          />
+          <button
+            type="button"
+            onClick={() => setShowPw((v) => !v)}
+            className="absolute inset-y-0 right-2 text-amber-200/60"
+            aria-label="toggle"
+          >
+            {showPw ? '🙈' : '👁'}
+          </button>
+        </div>
+        <button
+          type="submit"
+          disabled={busy}
+          className="w-full rounded bg-amber-600 px-4 py-2 font-semibold text-[#1b120b] disabled:opacity-60"
+        >
+          {busy ? t('connecting') : t('submit')}
+        </button>
+      </form>
+
+      {message && (
+        <p className={`mt-3 ${message.ok ? 'text-green-400' : 'text-red-400'}`}>{message.text}</p>
+      )}
+    </div>
+  )
+}
diff --git a/web-next/app/[locale]/login/page.tsx b/web-next/app/[locale]/login/page.tsx
new file mode 100644
index 0000000..4d2d576
--- /dev/null
+++ b/web-next/app/[locale]/login/page.tsx
@@ -0,0 +1,15 @@
+import { getTranslations, setRequestLocale } from 'next-intl/server'
+import { LoginForm } from './LoginForm'
+
+export default async function LoginPage({ params }: { params: Promise<{ locale: string }> }) {
+  const { locale } = await params
+  setRequestLocale(locale)
+  const t = await getTranslations('Login')
+
+  return (
+    <main className="mx-auto max-w-3xl px-4 py-8">
+      <h1 className="mb-6 text-center text-2xl font-bold text-amber-500">{t('title')}</h1>
+      <LoginForm />
+    </main>
+  )
+}
diff --git a/web-next/app/api/auth/login/route.ts b/web-next/app/api/auth/login/route.ts
new file mode 100644
index 0000000..97b9d52
--- /dev/null
+++ b/web-next/app/api/auth/login/route.ts
@@ -0,0 +1,42 @@
+import { authenticate, getGameAccounts } from '@/lib/auth'
+import { getSession } from '@/lib/session'
+import { setGameAccountSession } from '@/lib/account-session'
+
+export async function POST(request: Request) {
+  let email = ''
+  let password = ''
+  try {
+    const body = await request.json()
+    email = String(body.email ?? '').trim()
+    password = String(body.password ?? '')
+  } catch {
+    return Response.json({ success: false, error: 'invalidRequest' }, { status: 400 })
+  }
+
+  if (!email || !password) {
+    return Response.json({ success: false, error: 'missingFields' })
+  }
+
+  const account = await authenticate(email, password)
+  if (!account) {
+    return Response.json({ success: false, error: 'invalidCredentials' })
+  }
+
+  const session = await getSession()
+  session.bnetId = account.id
+  session.bnetEmail = account.email
+
+  const games = await getGameAccounts(account.id)
+  let needsSelection = true
+  if (games.length === 1) {
+    setGameAccountSession(session, games[0])
+    needsSelection = false
+  } else {
+    // 0 o >1 cuentas de juego: dejar la selección pendiente
+    delete session.username
+    delete session.accountId
+  }
+  await session.save()
+
+  return Response.json({ success: true, needsSelection })
+}
diff --git a/web-next/lib/account-session.ts b/web-next/lib/account-session.ts
new file mode 100644
index 0000000..7b878f3
--- /dev/null
+++ b/web-next/lib/account-session.ts
@@ -0,0 +1,8 @@
+import type { SessionData } from './session'
+import type { GameAccount } from './auth'
+
+/** Fija la cuenta de juego elegida en la sesión (equiv. a _set_game_account_session). */
+export function setGameAccountSession(session: SessionData, game: GameAccount): void {
+  session.username = game.username
+  session.accountId = game.id
+}
diff --git a/web-next/lib/auth.ts b/web-next/lib/auth.ts
new file mode 100644
index 0000000..2123e90
--- /dev/null
+++ b/web-next/lib/auth.ts
@@ -0,0 +1,46 @@
+import type { RowDataPacket } from 'mysql2'
+import { db, DB } from './db'
+import { bnetVerify, normalizeEmail } from './bnet'
+
+export interface BnetAccount {
+  id: number
+  email: string
+}
+
+export interface GameAccount {
+  id: number
+  username: string
+  index: number
+}
+
+/** Verifica email+password contra battlenet_accounts (SRP6 v2). Null si falla. */
+export async function authenticate(email: string, password: string): Promise<BnetAccount | null> {
+  try {
+    const [rows] = await db(DB.auth).query<RowDataPacket[]>(
+      'SELECT id, email, salt, verifier FROM battlenet_accounts WHERE email = ?',
+      [normalizeEmail(email)],
+    )
+    const row = rows[0]
+    if (!row) return null
+    const salt: Buffer | null = row.salt ?? null
+    const verifier: Buffer | null = row.verifier ?? null
+    if (!bnetVerify(email, password, salt, verifier)) return null
+    return { id: row.id, email: row.email }
+  } catch {
+    // La BD de cuentas (AzerothCore) puede no estar disponible/poblada.
+    return null
+  }
+}
+
+/** Cuentas de juego enlazadas a una cuenta Battle.net. */
+export async function getGameAccounts(bnetId: number): Promise<GameAccount[]> {
+  try {
+    const [rows] = await db(DB.auth).query<RowDataPacket[]>(
+      'SELECT id, username, battlenet_index FROM account WHERE battlenet_account = ? ORDER BY battlenet_index',
+      [bnetId],
+    )
+    return rows.map((r) => ({ id: r.id, username: r.username, index: r.battlenet_index }))
+  } catch {
+    return []
+  }
+}
diff --git a/web-next/lib/session.ts b/web-next/lib/session.ts
new file mode 100644
index 0000000..88a0776
--- /dev/null
+++ b/web-next/lib/session.ts
@@ -0,0 +1,25 @@
+import { getIronSession, type SessionOptions } from 'iron-session'
+import { cookies } from 'next/headers'
+
+// Sesión cifrada en cookie httpOnly (equivalente a la sesión Django de antes).
+export interface SessionData {
+  bnetId?: number
+  bnetEmail?: string
+  username?: string // cuenta de juego elegida (<bnetId>#<index>)
+  accountId?: number
+}
+
+export const sessionOptions: SessionOptions = {
+  password: process.env.SESSION_SECRET as string,
+  cookieName: 'novawow_session',
+  cookieOptions: {
+    httpOnly: true,
+    secure: process.env.NODE_ENV === 'production',
+    sameSite: 'lax',
+    path: '/',
+  },
+}
+
+export async function getSession() {
+  return getIronSession<SessionData>(await cookies(), sessionOptions)
+}
diff --git a/web-next/messages/en.json b/web-next/messages/en.json
index 8963098..91c2205 100644
--- a/web-next/messages/en.json
+++ b/web-next/messages/en.json
@@ -15,5 +15,20 @@
     "noNews": "There are no news available at the moment.",
     "link": "Link",
     "here": "here"
+  },
+  "Login": {
+    "title": "Sign in to Nova WoW",
+    "email": "Email",
+    "password": "Password",
+    "submit": "Sign in",
+    "connecting": "Signing in…",
+    "success": "Signed in successfully. Redirecting…",
+    "invalidCredentials": "Incorrect email or password",
+    "missingFields": "Please fill in all fields.",
+    "invalidRequest": "Invalid request.",
+    "genericError": "Something went wrong. Please try again later.",
+    "forgot": "I forgot my password/username",
+    "newHere": "New to the community? You can create an account",
+    "createAccount": "here"
   }
 }
diff --git a/web-next/messages/es.json b/web-next/messages/es.json
index 2ae749d..fd054a7 100644
--- a/web-next/messages/es.json
+++ b/web-next/messages/es.json
@@ -15,5 +15,20 @@
     "noNews": "No hay noticias disponibles en este momento.",
     "link": "Enlace",
     "here": "aquí"
+  },
+  "Login": {
+    "title": "Conectar a Nova WoW",
+    "email": "Correo electrónico",
+    "password": "Contraseña",
+    "submit": "Conectar",
+    "connecting": "Conectando…",
+    "success": "Conexión exitosa. Redirigiendo…",
+    "invalidCredentials": "Correo o contraseña incorrectos",
+    "missingFields": "Por favor rellene todos los campos.",
+    "invalidRequest": "Solicitud no válida.",
+    "genericError": "Algo ha salido mal. Inténtalo más tarde.",
+    "forgot": "He olvidado mi contraseña/usuario",
+    "newHere": "¿Nuevo en la comunidad? Puedes crear una cuenta",
+    "createAccount": "aquí"
   }
 }
diff --git a/web-next/package-lock.json b/web-next/package-lock.json
index e7bbcfe..4005608 100644
--- a/web-next/package-lock.json
+++ b/web-next/package-lock.json
@@ -8,6 +8,7 @@
       "name": "web-next",
       "version": "0.1.0",
       "dependencies": {
+        "iron-session": "^8.0.4",
         "mysql2": "^3.22.6",
         "next": "16.2.10",
         "next-intl": "^4.13.2",
@@ -3506,6 +3507,14 @@
       "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
       "dev": true
     },
+    "node_modules/cookie": {
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
+      "integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -4867,6 +4876,28 @@
         "@formatjs/icu-messageformat-parser": "3.5.14"
       }
     },
+    "node_modules/iron-session": {
+      "version": "8.0.4",
+      "resolved": "https://registry.npmjs.org/iron-session/-/iron-session-8.0.4.tgz",
+      "integrity": "sha512-9ivNnaKOd08osD0lJ3i6If23GFS2LsxyMU8Gf/uBUEgm8/8CC1hrrCHFDpMo3IFbpBgwoo/eairRsaD3c5itxA==",
+      "funding": [
+        "https://github.com/sponsors/vvo",
+        "https://github.com/sponsors/brc-dd"
+      ],
+      "dependencies": {
+        "cookie": "^0.7.2",
+        "iron-webcrypto": "^1.2.1",
+        "uncrypto": "^0.1.3"
+      }
+    },
+    "node_modules/iron-webcrypto": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/iron-webcrypto/-/iron-webcrypto-1.2.1.tgz",
+      "integrity": "sha512-feOM6FaSr6rEABp/eDfVseKyTMDt+KGpeB35SkVn9Tyn0CqvVsY3EwI0v5i8nMHyJnzCIQf7nsy3p41TPkJZhg==",
+      "funding": {
+        "url": "https://github.com/sponsors/brc-dd"
+      }
+    },
     "node_modules/is-array-buffer": {
       "version": "3.0.5",
       "resolved": "https://registry.npmjs.org/is-array-buffer/-/is-array-buffer-3.0.5.tgz",
@@ -7279,6 +7310,11 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/uncrypto": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/uncrypto/-/uncrypto-0.1.3.tgz",
+      "integrity": "sha512-Ql87qFHB3s/De2ClA9e0gsnS6zXG27SkTiSJwjCc9MebbfapQfuPzumMIUMi38ezPZVNFcHI9sUIepeQfw8J8Q=="
+    },
     "node_modules/undici-types": {
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
diff --git a/web-next/package.json b/web-next/package.json
index eae5f9f..917641b 100644
--- a/web-next/package.json
+++ b/web-next/package.json
@@ -9,6 +9,7 @@
     "lint": "eslint"
   },
   "dependencies": {
+    "iron-session": "^8.0.4",
     "mysql2": "^3.22.6",
     "next": "16.2.10",
     "next-intl": "^4.13.2",
diff --git a/web-next/tsconfig.json b/web-next/tsconfig.json
index 3a13f90..058448b 100644
--- a/web-next/tsconfig.json
+++ b/web-next/tsconfig.json
@@ -1,7 +1,11 @@
 {
   "compilerOptions": {
-    "target": "ES2017",
-    "lib": ["dom", "dom.iterable", "esnext"],
+    "target": "ES2020",
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
     "allowJs": true,
     "skipLibCheck": true,
     "strict": true,
@@ -19,7 +23,9 @@
       }
     ],
     "paths": {
-      "@/*": ["./*"]
+      "@/*": [
+        "./*"
+      ]
     }
   },
   "include": [
@@ -30,5 +36,7 @@
     ".next/dev/types/**/*.ts",
     "**/*.mts"
   ],
-  "exclude": ["node_modules"]
+  "exclude": [
+    "node_modules"
+  ]
 }