diff --git a/backend/src/routes/auth.ts b/backend/src/routes/auth.ts
index 3389db2..53c78e3 100644
--- a/backend/src/routes/auth.ts
+++ b/backend/src/routes/auth.ts
@@ -89,11 +89,11 @@ const auth: FastifyPluginAsync = async (fastify) => {
   // ── POST /api/auth/register ────────────────────────────────────────────────
   fastify.post<{
     Body: {
-      hotelName: string
-      address?: string
+      hotel_name: string
+      address: string
       contact: string
       email: string
-      phone?: string
+      phone: string
       password: string
     }
   }>(
@@ -102,20 +102,20 @@ const auth: FastifyPluginAsync = async (fastify) => {
       schema: {
         body: {
           type: 'object',
-          required: ['hotelName', 'contact', 'email', 'password'],
+          required: ['hotel_name', 'address', 'contact', 'email', 'phone', 'password'],
           properties: {
-            hotelName: { type: 'string', minLength: 2 },
-            address:   { type: 'string' },
-            contact:   { type: 'string', minLength: 2 },
-            email:     { type: 'string' },
-            phone:     { type: 'string' },
-            password:  { type: 'string', minLength: 8 },
+            hotel_name: { type: 'string', minLength: 2 },
+            address:    { type: 'string', minLength: 2 },
+            contact:    { type: 'string', minLength: 2 },
+            email:      { type: 'string' },
+            phone:      { type: 'string', minLength: 5 },
+            password:   { type: 'string', minLength: 8 },
           },
         },
       },
     },
     async (request, reply) => {
-      const { hotelName, address, contact, email, phone, password } = request.body
+      const { hotel_name: hotelName, address, contact, email, phone, password } = request.body
 
       if (!/[a-zA-Zа-яА-ЯёЁ]/.test(password)) {
         return reply.code(400).send({ error: 'Пароль должен содержать хотя бы одну букву' })
diff --git a/src/lib/api.ts b/src/lib/api.ts
index eb3253f..273e06a 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -175,13 +175,21 @@ export const api = {
 
     register: (data: {
       hotelName: string
-      address?: string
+      address: string
       contact: string
       email: string
-      phone?: string
+      phone: string
       password: string
     }) =>
-      req<{ ok: boolean; message: string }>('POST', '/api/auth/register', data),
+      // Snake_case вручную — req() конвертирует camelCase→snake_case автоматически
+      req<{ ok: boolean; message: string }>('POST', '/api/auth/register', {
+        hotel_name: data.hotelName,
+        address:    data.address,
+        contact:    data.contact,
+        email:      data.email,
+        phone:      data.phone,
+        password:   data.password,
+      }),
 
     forgotPassword: (email: string) =>
       req<{ ok: boolean }>('POST', '/api/auth/forgot-password', { email }),
diff --git a/src/pages/LoginPage.tsx b/src/pages/LoginPage.tsx
index ef1fb7f..c080e42 100644
--- a/src/pages/LoginPage.tsx
+++ b/src/pages/LoginPage.tsx
@@ -285,6 +285,21 @@ function ForgotPasswordForm({ onBack }: { onBack: () => void }) {
   )
 }
 
+// ── Phone mask helper ──────────────────────────────────────────────────────────
+function formatPhone(raw: string): string {
+  const digits = raw.replace(/\D/g, '')
+  // Normalize: leading 8 or 7 → keep as +7, otherwise prepend 7
+  const d = digits.startsWith('8') ? '7' + digits.slice(1)
+          : digits.startsWith('7') ? digits
+          : digits.length ? '7' + digits : ''
+  let result = '+7'
+  if (d.length > 1) result += ' (' + d.slice(1, Math.min(4, d.length))
+  if (d.length >= 4) result += ') ' + d.slice(4, Math.min(7, d.length))
+  if (d.length >= 7) result += '-' + d.slice(7, Math.min(9, d.length))
+  if (d.length >= 9) result += '-' + d.slice(9, Math.min(11, d.length))
+  return result
+}
+
 // ── Register form ──────────────────────────────────────────────────────────────
 function RegisterForm({ onSwitch }: { onSwitch: () => void }) {
   const [done,      setDone]      = useState(false)
@@ -300,14 +315,24 @@ function RegisterForm({ onSwitch }: { onSwitch: () => void }) {
   const [loading,   setLoading]   = useState(false)
   const [errors,    setErrors]    = useState<Record<string, string>>({})
 
+  const handlePhoneChange = (raw: string) => {
+    // Allow clearing
+    if (raw === '' || raw === '+') { setPhone(''); return }
+    setPhone(formatPhone(raw))
+    setErrors(prev => ({ ...prev, phone: '' }))
+  }
+
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault()
     const err: Record<string, string> = {}
-    if (!hotelName.trim()) err.hotelName = 'Введите название отеля'
-    if (!contact.trim())   err.contact   = 'Введите контактное лицо'
-    if (!email.trim())     err.email     = 'Введите email'
+    if (!hotelName.trim())  err.hotelName = 'Введите название отеля'
+    if (!address.trim())    err.address   = 'Введите адрес отеля'
+    if (!contact.trim())    err.contact   = 'Введите контактное лицо'
+    if (!email.trim())      err.email     = 'Введите email'
     else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) err.email = 'Некорректный email'
-    if (password.length < 8) err.password = 'Минимум 8 символов'
+    const phoneDigits = phone.replace(/\D/g, '')
+    if (phoneDigits.length < 11) err.phone = 'Введите полный номер телефона'
+    if (password.length < 8)    err.password = 'Минимум 8 символов'
     else if (!/[a-zA-Zа-яА-ЯёЁ]/.test(password)) err.password = 'Пароль должен содержать хотя бы одну букву'
     if (!agreed) err.agreed = 'Необходимо принять пользовательское соглашение'
     setErrors(err)
@@ -366,12 +391,13 @@ function RegisterForm({ onSwitch }: { onSwitch: () => void }) {
           />
         </Field>
 
-        <Field label="Адрес" error={errors.address}>
+        <Field label="Адрес *" error={errors.address}>
           <input
-            type="text" className="input"
+            type="text"
+            className={cn('input', errors.address && 'border-red-400 focus:ring-red-400')}
             placeholder="г. Москва, ул. Примерная, д. 1"
             value={address}
-            onChange={e => setAddress(e.target.value)}
+            onChange={e => { setAddress(e.target.value); setErrors(prev => ({ ...prev, address: '' })) }}
           />
         </Field>
 
@@ -396,12 +422,16 @@ function RegisterForm({ onSwitch }: { onSwitch: () => void }) {
           />
         </Field>
 
-        <Field label="Телефон" error={errors.phone}>
+        <Field label="Телефон *" error={errors.phone}>
           <input
-            type="tel" className="input"
+            type="tel"
+            className={cn('input', errors.phone && 'border-red-400 focus:ring-red-400')}
             placeholder="+7 (999) 000-00-00"
             value={phone}
-            onChange={e => setPhone(e.target.value)}
+            onChange={e => handlePhoneChange(e.target.value)}
+            onFocus={() => { if (!phone) setPhone('+7 (') }}
+            onBlur={() => { if (phone === '+7 (' || phone === '+7') setPhone('') }}
+            inputMode="tel"
           />
         </Field>