diff --git a/library_service/main.py b/library_service/main.py
index a23b76a..582688a 100644
--- a/library_service/main.py
+++ b/library_service/main.py
@@ -1,4 +1,6 @@
 """Основной модуль"""
+
+import asyncio
 from contextlib import asynccontextmanager
 from datetime import datetime
 from pathlib import Path
@@ -7,12 +9,13 @@ from uuid import uuid4
 
 from alembic import command
 from alembic.config import Config
-from fastapi import Request, Response
+from fastapi import FastAPI, Depends, Request, Response, status
 from fastapi.staticfiles import StaticFiles
 from sqlmodel import Session
 
 from library_service.auth import run_seeds
 from library_service.routers import api_router
+from library_service.services.captcha import limiter, cleanup_task, require_captcha
 from library_service.settings import (
     LOGGING_CONFIG,
     engine,
@@ -20,6 +23,7 @@ from library_service.settings import (
     get_logger,
 )
 
+
 SKIP_LOGGING_PATHS = frozenset({"/favicon.ico", "/favicon.svg"})
 
 
@@ -47,6 +51,7 @@ async def lifespan(_):
     except Exception as e:
         logger.error(f"[-] Seeding failed: {e}")
 
+    asyncio.create_task(cleanup_task())
     logger.info("[+] Starting application...")
     yield  # Обработка запросов
     logger.info("[+] Application shutdown")
@@ -113,7 +118,10 @@ async def log_requests(request: Request, call_next):
             },
             exc_info=True,
         )
-        return Response(status_code=500, content="Internal Server Error")
+        return Response(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            content="Internal Server Error",
+        )
 
 
 # Подключение маршрутов
@@ -127,6 +135,7 @@ app.mount(
 
 if __name__ == "__main__":
     import uvicorn
+
     uvicorn.run(
         "library_service.main:app",
         host="0.0.0.0",
diff --git a/library_service/routers/__init__.py b/library_service/routers/__init__.py
index 706eb46..5756284 100644
--- a/library_service/routers/__init__.py
+++ b/library_service/routers/__init__.py
@@ -8,6 +8,7 @@ from .books import router as books_router
 from .genres import router as genres_router
 from .loans import router as loans_router
 from .relationships import router as relationships_router
+from .cap import router as cap_router
 from .users import router as users_router
 from .misc import router as misc_router
 
@@ -22,5 +23,6 @@ api_router.include_router(authors_router, prefix="/api")
 api_router.include_router(books_router, prefix="/api")
 api_router.include_router(genres_router, prefix="/api")
 api_router.include_router(loans_router, prefix="/api")
+api_router.include_router(cap_router, prefix="/api")
 api_router.include_router(users_router, prefix="/api")
 api_router.include_router(relationships_router, prefix="/api")
diff --git a/library_service/routers/auth.py b/library_service/routers/auth.py
index 25ac895..ce27915 100644
--- a/library_service/routers/auth.py
+++ b/library_service/routers/auth.py
@@ -7,6 +7,7 @@ from fastapi import APIRouter, Body, Depends, HTTPException, status
 from fastapi.security import OAuth2PasswordRequestForm
 from sqlmodel import Session, select
 
+from library_service.services import require_captcha
 from library_service.models.db import Role, User
 from library_service.models.dto import (
     Token,
@@ -63,7 +64,11 @@ router = APIRouter(prefix="/auth", tags=["authentication"])
     summary="Регистрация нового пользователя",
     description="Создает нового пользователя и возвращает резервные коды",
 )
-def register(user_data: UserCreate, session: Session = Depends(get_session)):
+def register(
+    user_data: UserCreate,
+    _=Depends(require_captcha),
+    session: Session = Depends(get_session),
+):
     """Регистрирует нового пользователя в системе"""
     existing_user = session.exec(
         select(User).where(User.username == user_data.username)
diff --git a/library_service/routers/authors.py b/library_service/routers/authors.py
index 9b61c4b..f3b1670 100644
--- a/library_service/routers/authors.py
+++ b/library_service/routers/authors.py
@@ -1,12 +1,19 @@
 """Модуль работы с авторами"""
-from fastapi import APIRouter, Depends, HTTPException, Path
+
+from fastapi import APIRouter, Depends, HTTPException, Path, status
 from sqlmodel import Session, select
 
 from library_service.auth import RequireStaff
 from library_service.settings import get_session
 from library_service.models.db import Author, AuthorBookLink, Book
-from library_service.models.dto import (BookRead, AuthorWithBooks,
-    AuthorCreate, AuthorList, AuthorRead, AuthorUpdate)
+from library_service.models.dto import (
+    BookRead,
+    AuthorWithBooks,
+    AuthorCreate,
+    AuthorList,
+    AuthorRead,
+    AuthorUpdate,
+)
 
 
 router = APIRouter(prefix="/authors", tags=["authors"])
@@ -59,7 +66,9 @@ def get_author(
     """Возвращает информацию об авторе и его книгах"""
     author = session.get(Author, author_id)
     if not author:
-        raise HTTPException(status_code=404, detail="Author not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Author not found"
+        )
 
     books = session.exec(
         select(Book).join(AuthorBookLink).where(AuthorBookLink.author_id == author_id)
@@ -88,7 +97,9 @@ def update_author(
     """Обновляет информацию об авторе"""
     db_author = session.get(Author, author_id)
     if not db_author:
-        raise HTTPException(status_code=404, detail="Author not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Author not found"
+        )
 
     update_data = author.model_dump(exclude_unset=True)
     for field, value in update_data.items():
@@ -113,7 +124,9 @@ def delete_author(
     """Удаляет автора из системы"""
     author = session.get(Author, author_id)
     if not author:
-        raise HTTPException(status_code=404, detail="Author not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Author not found"
+        )
 
     author_read = AuthorRead(**author.model_dump())
     session.delete(author)
diff --git a/library_service/routers/books.py b/library_service/routers/books.py
index 6002423..d0c8e83 100644
--- a/library_service/routers/books.py
+++ b/library_service/routers/books.py
@@ -3,7 +3,7 @@
 from datetime import datetime, timezone
 from typing import List
 
-from fastapi import APIRouter, Depends, HTTPException, Path, Query
+from fastapi import APIRouter, Depends, HTTPException, Path, Query, status
 from sqlmodel import Session, select, col, func
 
 from library_service.auth import RequireStaff
@@ -56,10 +56,16 @@ def close_active_loan(session: Session, book_id: int) -> None:
 def filter_books(
     session: Session = Depends(get_session),
     q: str | None = Query(None, max_length=50, description="Поиск"),
-    author_ids: List[int] | None = Query(None, description="Список ID авторов"),
-    genre_ids: List[int] | None = Query(None, description="Список ID жанров"),
+    min_page_count: int | None = Query(
+        None, ge=0, description="Минимальное количество страниц"
+    ),
+    max_page_count: int | None = Query(
+        None, ge=0, description="Максимальное количество страниц"
+    ),
+    author_ids: List[int] | None = Query(None, gt=0, description="Список ID авторов"),
+    genre_ids: List[int] | None = Query(None, gt=0, description="Список ID жанров"),
     page: int = Query(1, gt=0, description="Номер страницы"),
-    size: int = Query(20, gt=0, lt=101, description="Количество элементов на странице"),
+    size: int = Query(20, gt=0, le=100, description="Количество элементов на странице"),
 ):
     """Возвращает отфильтрованный список книг с пагинацией"""
     statement = select(Book).distinct()
@@ -69,6 +75,12 @@ def filter_books(
             (col(Book.title).ilike(f"%{q}%")) | (col(Book.description).ilike(f"%{q}%"))
         )
 
+    if min_page_count:
+        statement = statement.where(Book.page_count >= min_page_count)
+
+    if max_page_count:
+        statement = statement.where(Book.page_count <= max_page_count)
+
     if author_ids:
         statement = statement.join(AuthorBookLink).where(
             AuthorBookLink.author_id.in_(  # ty: ignore[unresolved-attribute, unresolved-reference]
@@ -149,7 +161,9 @@ def get_book(
     """Возвращает информацию о книге с авторами и жанрами"""
     book = session.get(Book, book_id)
     if not book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
 
     authors = session.exec(
         select(Author).join(AuthorBookLink).where(AuthorBookLink.book_id == book_id)
@@ -185,12 +199,14 @@ def update_book(
     """Обновляет информацию о книге"""
     db_book = session.get(Book, book_id)
     if not db_book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
 
     if book_update.status is not None:
         if book_update.status == BookStatus.BORROWED:
             raise HTTPException(
-                status_code=400,
+                status_code=status.HTTP_400_BAD_REQUEST,
                 detail="Статус 'borrowed' устанавливается только через выдачу книги",
             )
 
@@ -226,7 +242,9 @@ def delete_book(
     """Удаляет книгу из системы"""
     book = session.get(Book, book_id)
     if not book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
     book_read = BookRead(
         id=(book.id or 0),
         title=book.title,
diff --git a/library_service/routers/cap.py b/library_service/routers/cap.py
new file mode 100644
index 0000000..6bedc03
--- /dev/null
+++ b/library_service/routers/cap.py
@@ -0,0 +1,101 @@
+import asyncio
+import hashlib
+import secrets
+
+from fastapi import APIRouter, Request, Depends, HTTPException, status
+from fastapi.responses import JSONResponse
+from library_service.services.captcha import (
+    limiter,
+    get_ip,
+    active_challenges,
+    challenges_by_ip,
+    MAX_CHALLENGES_PER_IP,
+    MAX_TOTAL_CHALLENGES,
+    CHALLENGE_TTL,
+    REDEEM_TTL,
+    prng,
+    now_ms,
+    redeem_tokens,
+)
+
+router = APIRouter(prefix="/cap", tags=["captcha"])
+
+
+@router.post("/challenge")
+@limiter.limit("15/minute")
+async def challenge(request: Request, ip: str = Depends(get_ip)):
+    if challenges_by_ip[ip] >= MAX_CHALLENGES_PER_IP:
+        raise HTTPException(
+            status_code=status.HTTP_429_TOO_MANY_REQUESTS, detail="Too many challenges"
+        )
+    if len(active_challenges) >= MAX_TOTAL_CHALLENGES:
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE, detail="Server busy"
+        )
+
+    token = secrets.token_hex(25)
+    redeem = secrets.token_hex(25)
+    expires = now_ms() + CHALLENGE_TTL
+
+    active_challenges[token] = {
+        "c": 50,
+        "s": 32,
+        "d": 4,
+        "expires": expires,
+        "redeem_token": redeem,
+        "ip": ip,
+    }
+    challenges_by_ip[ip] += 1
+
+    return {"challenge": {"c": 50, "s": 32, "d": 4}, "token": token, "expires": expires}
+
+
+@router.post("/redeem")
+@limiter.limit("30/minute")
+async def redeem(request: Request, payload: dict, ip: str = Depends(get_ip)):
+    token = payload.get("token")
+    solutions = payload.get("solutions", [])
+
+    if token not in active_challenges:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Invalid challenge"
+        )
+
+    ch = active_challenges.pop(token)
+    challenges_by_ip[ch["ip"]] -= 1
+
+    if now_ms() > ch["expires"]:
+        raise HTTPException(status_code=status.HTTP_410_GONE, detail="Expired")
+    if len(solutions) < ch["c"]:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Bad solutions"
+        )
+
+    def verify(i: int) -> bool:
+        salt = prng(f"{token}{i+1}", ch["s"])
+        target = prng(f"{token}{i+1}d", ch["d"])
+        h = hashlib.sha256((salt + str(solutions[i])).encode()).hexdigest()
+        return h.startswith(target)
+
+    results = await asyncio.gather(
+        *(asyncio.to_thread(verify, i) for i in range(ch["c"]))
+    )
+    if not all(results):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid solution"
+        )
+
+    r_token = ch["redeem_token"]
+    redeem_tokens[r_token] = now_ms() + REDEEM_TTL
+
+    resp = JSONResponse(
+        {"success": True, "token": r_token, "expires": redeem_tokens[r_token]}
+    )
+    resp.set_cookie(
+        key="capjs_token",
+        value=r_token,
+        httponly=True,
+        samesite="lax",
+        max_age=REDEEM_TTL // 1000,
+    )
+    return resp
diff --git a/library_service/routers/genres.py b/library_service/routers/genres.py
index d933dff..be0a134 100644
--- a/library_service/routers/genres.py
+++ b/library_service/routers/genres.py
@@ -1,10 +1,18 @@
 """Модуль работы с жанрами"""
-from fastapi import APIRouter, Depends, HTTPException, Path
+
+from fastapi import APIRouter, Depends, HTTPException, Path, status
 from sqlmodel import Session, select
 
 from library_service.auth import RequireStaff
 from library_service.models.db import Book, Genre, GenreBookLink
-from library_service.models.dto import BookRead, GenreCreate, GenreList, GenreRead, GenreUpdate, GenreWithBooks
+from library_service.models.dto import (
+    BookRead,
+    GenreCreate,
+    GenreList,
+    GenreRead,
+    GenreUpdate,
+    GenreWithBooks,
+)
 from library_service.settings import get_session
 
 
@@ -57,7 +65,9 @@ def get_genre(
     """Возвращает информацию о жанре и книгах с ним"""
     genre = session.get(Genre, genre_id)
     if not genre:
-        raise HTTPException(status_code=404, detail="Genre not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Genre not found"
+        )
 
     books = session.exec(
         select(Book).join(GenreBookLink).where(GenreBookLink.genre_id == genre_id)
@@ -86,7 +96,9 @@ def update_genre(
     """Обновляет информацию о жанре"""
     db_genre = session.get(Genre, genre_id)
     if not db_genre:
-        raise HTTPException(status_code=404, detail="Genre not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Genre not found"
+        )
 
     update_data = genre.model_dump(exclude_unset=True)
     for field, value in update_data.items():
@@ -111,7 +123,9 @@ def delete_genre(
     """Удаляет жанр из системы"""
     genre = session.get(Genre, genre_id)
     if not genre:
-        raise HTTPException(status_code=404, detail="Genre not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Genre not found"
+        )
 
     genre_read = GenreRead(**genre.model_dump())
     session.delete(genre)
diff --git a/library_service/routers/loans.py b/library_service/routers/loans.py
index 9abd970..48e3df5 100644
--- a/library_service/routers/loans.py
+++ b/library_service/routers/loans.py
@@ -40,17 +40,21 @@ def create_loan(
 
     book = session.get(Book, loan.book_id)
     if not book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
 
     if book.status != BookStatus.ACTIVE:
         raise HTTPException(
-            status_code=400,
+            status_code=status.HTTP_400_BAD_REQUEST,
             detail=f"Book is not available for loan (status: {book.status})",
         )
 
     target_user = session.get(User, loan.user_id)
     if not target_user:
-        raise HTTPException(status_code=404, detail="User not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+        )
 
     db_loan = BookUserLink(
         book_id=loan.book_id,
@@ -248,7 +252,9 @@ def get_loan(
     loan = session.get(BookUserLink, loan_id)
 
     if not loan:
-        raise HTTPException(status_code=404, detail="Loan not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+        )
 
     is_staff = is_user_staff(current_user)
 
@@ -275,7 +281,9 @@ def update_loan(
     """Обновляет информацию о выдаче"""
     db_loan = session.get(BookUserLink, loan_id)
     if not db_loan:
-        raise HTTPException(status_code=404, detail="Loan not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+        )
 
     is_staff = is_user_staff(current_user)
 
@@ -287,7 +295,9 @@ def update_loan(
 
     book = session.get(Book, db_loan.book_id)
     if not book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
 
     if loan_update.user_id is not None:
         if not is_staff:
@@ -297,7 +307,9 @@ def update_loan(
             )
         new_user = session.get(User, loan_update.user_id)
         if not new_user:
-            raise HTTPException(status_code=404, detail="User not found")
+            raise HTTPException(
+                status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+            )
         db_loan.user_id = loan_update.user_id
 
     if loan_update.due_date is not None:
@@ -305,7 +317,10 @@ def update_loan(
 
     if loan_update.returned_at is not None:
         if db_loan.returned_at is not None:
-            raise HTTPException(status_code=400, detail="Loan is already returned")
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Loan is already returned",
+            )
         db_loan.returned_at = loan_update.returned_at
         book.status = BookStatus.ACTIVE
 
@@ -331,18 +346,24 @@ def confirm_loan(
     """Подтверждает бронирование и меняет статус книги на BORROWED"""
     loan = session.get(BookUserLink, loan_id)
     if not loan:
-        raise HTTPException(status_code=404, detail="Loan not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+        )
 
     if loan.returned_at:
-        raise HTTPException(status_code=400, detail="Loan is already returned")
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Loan is already returned"
+        )
 
     book = session.get(Book, loan.book_id)
     if not book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
 
     if book.status not in [BookStatus.RESERVED, BookStatus.ACTIVE]:
         raise HTTPException(
-            status_code=400,
+            status_code=status.HTTP_400_BAD_REQUEST,
             detail=f"Cannot confirm loan for book with status: {book.status}",
         )
 
@@ -370,10 +391,14 @@ def return_loan(
     """Возвращает книгу и закрывает выдачу"""
     loan = session.get(BookUserLink, loan_id)
     if not loan:
-        raise HTTPException(status_code=404, detail="Loan not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+        )
 
     if loan.returned_at:
-        raise HTTPException(status_code=400, detail="Loan is already returned")
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Loan is already returned"
+        )
 
     loan.returned_at = datetime.now(timezone.utc)
 
@@ -403,7 +428,9 @@ def delete_loan(
     """Удаляет выдачу или бронирование (только для RESERVED статуса)"""
     loan = session.get(BookUserLink, loan_id)
     if not loan:
-        raise HTTPException(status_code=404, detail="Loan not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+        )
 
     is_staff = is_user_staff(current_user)
 
@@ -417,7 +444,7 @@ def delete_loan(
 
     if book and book.status != BookStatus.RESERVED:
         raise HTTPException(
-            status_code=400,
+            status_code=status.HTTP_400_BAD_REQUEST,
             detail="Can only delete reservations. Use update endpoint to return borrowed books",
         )
 
@@ -471,16 +498,21 @@ def issue_book_directly(
     """Выдает книгу напрямую без бронирования (только для администраторов)"""
     book = session.get(Book, loan.book_id)
     if not book:
-        raise HTTPException(status_code=404, detail="Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+        )
 
     if book.status != BookStatus.ACTIVE:
         raise HTTPException(
-            status_code=400, detail=f"Book is not available (status: {book.status})"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=f"Book is not available (status: {book.status})",
         )
 
     target_user = session.get(User, loan.user_id)
     if not target_user:
-        raise HTTPException(status_code=404, detail="User not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+        )
 
     db_loan = BookUserLink(
         book_id=loan.book_id,
diff --git a/library_service/routers/relationships.py b/library_service/routers/relationships.py
index 6fe3000..4fda0fa 100644
--- a/library_service/routers/relationships.py
+++ b/library_service/routers/relationships.py
@@ -1,7 +1,8 @@
 """Модуль работы со связями"""
+
 from typing import Dict, List
 
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, status
 from sqlmodel import Session, select
 
 from library_service.auth import RequireStaff
@@ -17,7 +18,9 @@ def check_entity_exists(session, model, entity_id, entity_name):
     """Проверяет существование сущности в базе данных"""
     entity = session.get(model, entity_id)
     if not entity:
-        raise HTTPException(status_code=404, detail=f"{entity_name} not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail=f"{entity_name} not found"
+        )
     return entity
 
 
@@ -30,7 +33,7 @@ def add_relationship(session, link_model, id1, field1, id2, field2, detail):
     ).first()
 
     if existing_link:
-        raise HTTPException(status_code=400, detail=detail)
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=detail)
 
     link = link_model(**{field1: id1, field2: id2})
     session.add(link)
@@ -48,7 +51,9 @@ def remove_relationship(session, link_model, id1, field1, id2, field2):
     ).first()
 
     if not link:
-        raise HTTPException(status_code=404, detail="Relationship not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Relationship not found"
+        )
 
     session.delete(link)
     session.commit()
@@ -56,21 +61,22 @@ def remove_relationship(session, link_model, id1, field1, id2, field2):
 
 
 def get_related(
-        session,
-        main_model,
-        main_id,
-        main_name,
-        related_model,
-        link_model,
-        link_main_field,
-        link_related_field,
-        read_model
-    ):
+    session,
+    main_model,
+    main_id,
+    main_name,
+    related_model,
+    link_model,
+    link_main_field,
+    link_related_field,
+    read_model,
+):
     """Возвращает список связанных сущностей"""
     check_entity_exists(session, main_model, main_id, main_name)
 
     related = session.exec(
-        select(related_model).join(link_model)
+        select(related_model)
+        .join(link_model)
         .where(getattr(link_model, link_main_field) == main_id)
     ).all()
 
@@ -93,8 +99,15 @@ def add_author_to_book(
     check_entity_exists(session, Author, author_id, "Author")
     check_entity_exists(session, Book, book_id, "Book")
 
-    return add_relationship(session, AuthorBookLink,
-        author_id, "author_id", book_id, "book_id", "Relationship already exists")
+    return add_relationship(
+        session,
+        AuthorBookLink,
+        author_id,
+        "author_id",
+        book_id,
+        "book_id",
+        "Relationship already exists",
+    )
 
 
 @router.delete(
@@ -110,8 +123,9 @@ def remove_author_from_book(
     session: Session = Depends(get_session),
 ):
     """Удаляет связь между автором и книгой"""
-    return remove_relationship(session, AuthorBookLink,
-        author_id, "author_id", book_id, "book_id")
+    return remove_relationship(
+        session, AuthorBookLink, author_id, "author_id", book_id, "book_id"
+    )
 
 
 @router.get(
@@ -122,9 +136,17 @@ def remove_author_from_book(
 )
 def get_books_for_author(author_id: int, session: Session = Depends(get_session)):
     """Возвращает список книг автора"""
-    return get_related(session,
-        Author, author_id, "Author", Book,
-        AuthorBookLink, "author_id", "book_id", BookRead)
+    return get_related(
+        session,
+        Author,
+        author_id,
+        "Author",
+        Book,
+        AuthorBookLink,
+        "author_id",
+        "book_id",
+        BookRead,
+    )
 
 
 @router.get(
@@ -135,9 +157,17 @@ def get_books_for_author(author_id: int, session: Session = Depends(get_session)
 )
 def get_authors_for_book(book_id: int, session: Session = Depends(get_session)):
     """Возвращает список авторов книги"""
-    return get_related(session,
-        Book, book_id, "Book", Author,
-        AuthorBookLink, "book_id", "author_id", AuthorRead)
+    return get_related(
+        session,
+        Book,
+        book_id,
+        "Book",
+        Author,
+        AuthorBookLink,
+        "book_id",
+        "author_id",
+        AuthorRead,
+    )
 
 
 @router.post(
@@ -156,8 +186,15 @@ def add_genre_to_book(
     check_entity_exists(session, Genre, genre_id, "Genre")
     check_entity_exists(session, Book, book_id, "Book")
 
-    return add_relationship(session, GenreBookLink,
-        genre_id, "genre_id", book_id, "book_id", "Relationship already exists")
+    return add_relationship(
+        session,
+        GenreBookLink,
+        genre_id,
+        "genre_id",
+        book_id,
+        "book_id",
+        "Relationship already exists",
+    )
 
 
 @router.delete(
@@ -173,8 +210,9 @@ def remove_genre_from_book(
     session: Session = Depends(get_session),
 ):
     """Удаляет связь между жанром и книгой"""
-    return remove_relationship(session, GenreBookLink,
-        genre_id, "genre_id", book_id, "book_id")
+    return remove_relationship(
+        session, GenreBookLink, genre_id, "genre_id", book_id, "book_id"
+    )
 
 
 @router.get(
@@ -185,9 +223,17 @@ def remove_genre_from_book(
 )
 def get_books_for_genre(genre_id: int, session: Session = Depends(get_session)):
     """Возвращает список книг в жанре"""
-    return get_related(session,
-        Genre, genre_id, "Genre", Book,
-        GenreBookLink, "genre_id", "book_id", BookRead)
+    return get_related(
+        session,
+        Genre,
+        genre_id,
+        "Genre",
+        Book,
+        GenreBookLink,
+        "genre_id",
+        "book_id",
+        BookRead,
+    )
 
 
 @router.get(
@@ -198,6 +244,14 @@ def get_books_for_genre(genre_id: int, session: Session = Depends(get_session)):
 )
 def get_genres_for_book(book_id: int, session: Session = Depends(get_session)):
     """Возвращает список жанров книги"""
-    return get_related(session,
-        Book, book_id, "Book", Genre,
-        GenreBookLink, "book_id", "genre_id", GenreRead)
+    return get_related(
+        session,
+        Book,
+        book_id,
+        "Book",
+        Genre,
+        GenreBookLink,
+        "book_id",
+        "genre_id",
+        GenreRead,
+    )
diff --git a/library_service/services/__init__.py b/library_service/services/__init__.py
new file mode 100644
index 0000000..4f5fe7b
--- /dev/null
+++ b/library_service/services/__init__.py
@@ -0,0 +1,29 @@
+from .captcha import (
+    limiter,
+    cleanup_task,
+    get_ip,
+    require_captcha,
+    active_challenges,
+    redeem_tokens,
+    challenges_by_ip,
+    MAX_CHALLENGES_PER_IP,
+    MAX_TOTAL_CHALLENGES,
+    CHALLENGE_TTL,
+    REDEEM_TTL,
+    prng,
+)
+
+__all__ = [
+    "limiter",
+    "cleanup_task",
+    "get_ip",
+    "require_captcha",
+    "active_challenges",
+    "redeem_tokens",
+    "challenges_by_ip",
+    "MAX_CHALLENGES_PER_IP",
+    "MAX_TOTAL_CHALLENGES",
+    "CHALLENGE_TTL",
+    "REDEEM_TTL",
+    "prng",
+]
diff --git a/library_service/services/captcha.py b/library_service/services/captcha.py
new file mode 100644
index 0000000..b9b7b72
--- /dev/null
+++ b/library_service/services/captcha.py
@@ -0,0 +1,75 @@
+import os
+import asyncio
+import hashlib
+import secrets
+import time
+from collections import defaultdict
+
+from fastapi import Request, HTTPException, Depends, status
+from fastapi.responses import JSONResponse
+from slowapi import Limiter
+from slowapi.util import get_remote_address
+
+CLEANUP_INTERVAL = int(os.getenv("CAP_CLEANUP_INTERVAL", "10"))
+REDEEM_TTL = int(os.getenv("CAP_REDEEM_TTL_SECONDS", "180")) * 1000
+CHALLENGE_TTL = int(os.getenv("CAP_CHALLENGE_TTL_SECONDS", "120")) * 1000
+MAX_CHALLENGES_PER_IP = int(os.getenv("CAP_MAX_CHALLENGES_PER_IP", "12"))
+MAX_TOTAL_CHALLENGES = int(os.getenv("CAP_MAX_TOTAL_CHALLENGES", "1000"))
+
+active_challenges: dict[str, dict] = {}
+redeem_tokens: dict[str, int] = {}
+challenges_by_ip: defaultdict[str, int] = defaultdict(int)
+limiter = Limiter(key_func=get_remote_address)
+
+
+def now_ms() -> int:
+    return int(time.time() * 1000)
+
+
+def fnv1a_utf16(seed: str) -> int:
+    h = 2166136261
+    data = seed.encode("utf-16le")
+    i = 0
+    while i < len(data):
+        unit = data[i] + (data[i + 1] << 8)
+        h ^= unit
+        h = (h + (h << 1) + (h << 4) + (h << 7) + (h << 8) + (h << 24)) & 0xFFFFFFFF
+        i += 2
+    return h
+
+
+def prng(seed: str, length: int) -> str:
+    state = fnv1a_utf16(seed)
+    out = ""
+    while len(out) < length:
+        state ^= (state << 13) & 0xFFFFFFFF
+        state ^= state >> 17
+        state ^= (state << 5) & 0xFFFFFFFF
+        out += f"{state & 0xFFFFFFFF:08x}"
+    return out[:length]
+
+
+async def cleanup_task():
+    while True:
+        now = now_ms()
+        for token, data in list(active_challenges.items()):
+            if data["expires"] < now:
+                challenges_by_ip[data["ip"]] -= 1
+                del active_challenges[token]
+        for token, exp in list(redeem_tokens.items()):
+            if exp < now:
+                del redeem_tokens[token]
+        await asyncio.sleep(CLEANUP_INTERVAL)
+
+
+def get_ip(request: Request) -> str:
+    return get_remote_address(request)
+
+
+async def require_captcha(request: Request):
+    token = request.cookies.get("capjs_token")
+    if not token or token not in redeem_tokens or redeem_tokens[token] < now_ms():
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail={"error": "captcha_required"}
+        )
+    del redeem_tokens[token]
diff --git a/library_service/settings.py b/library_service/settings.py
index 8231e80..9daf680 100644
--- a/library_service/settings.py
+++ b/library_service/settings.py
@@ -61,6 +61,7 @@ OPENAPI_TAGS = [
     {"name": "loans", "description": "Действия с выдачами."},
     {"name": "relations", "description": "Действия со связями."},
     {"name": "users", "description": "Действия с пользователями."},
+    {"name": "captcha", "description": "Создание и проверка cap.js каптчи."},
     {"name": "misc", "description": "Прочие."},
 ]
 
diff --git a/library_service/static/page/auth.js b/library_service/static/page/auth.js
index d815b36..92ca099 100644
--- a/library_service/static/page/auth.js
+++ b/library_service/static/page/auth.js
@@ -1,6 +1,70 @@
 $(() => {
-  const PARTIAL_TOKEN_KEY = "partial_token";
-  const PARTIAL_USERNAME_KEY = "partial_username";
+  const SELECTORS = {
+    loginForm: "#login-form",
+    registerForm: "#register-form",
+    resetForm: "#reset-password-form",
+    loginTab: "#login-tab",
+    registerTab: "#register-tab",
+    forgotBtn: "#forgot-password-btn",
+    backToLoginBtn: "#back-to-login-btn",
+    backToCredentialsBtn: "#back-to-credentials-btn",
+    submitLogin: "#login-submit",
+    submitRegister: "#register-submit",
+    submitReset: "#reset-submit",
+    usernameLogin: "#login-username",
+    passwordLogin: "#login-password",
+    totpInput: "#login-totp",
+    rememberMe: "#remember-me",
+    credentialsSection: "#credentials-section",
+    totpSection: "#totp-section",
+    registerUsername: "#register-username",
+    registerEmail: "#register-email",
+    registerFullname: "#register-fullname",
+    registerPassword: "#register-password",
+    registerConfirm: "#register-password-confirm",
+    passwordStrengthBar: "#password-strength-bar",
+    passwordStrengthText: "#password-strength-text",
+    passwordMatchError: "#password-match-error",
+    resetUsername: "#reset-username",
+    resetCode: "#reset-recovery-code",
+    resetNewPassword: "#reset-new-password",
+    resetConfirmPassword: "#reset-confirm-password",
+    resetMatchError: "#reset-password-match-error",
+    recoveryModal: "#recovery-codes-modal",
+    recoveryList: "#recovery-codes-list",
+    codesSavedCheckbox: "#codes-saved-checkbox",
+    closeRecoveryBtn: "#close-recovery-modal-btn",
+    copyCodesBtn: "#copy-codes-btn",
+    downloadCodesBtn: "#download-codes-btn",
+    gotoLoginAfterReset: "#goto-login-after-reset",
+    capWidget: "#cap",
+    lockProgressCircle: "#lock-progress-circle",
+  };
+
+  const STORAGE_KEYS = {
+    partialToken: "partial_token",
+    partialUsername: "partial_username",
+  };
+
+  const TEXTS = {
+    login: "Войти",
+    confirm: "Подтвердить",
+    checking: "Проверка...",
+    registering: "Регистрация...",
+    resetting: "Сброс...",
+    enterTotp: "Введите код из приложения аутентификатора",
+    sessionExpired: "Время сессии истекло. Пожалуйста, войдите заново.",
+    invalidCode: "Неверный код",
+    passwordsNotMatch: "Пароли не совпадают",
+    captchaRequired: "Пожалуйста, пройдите проверку Captcha",
+    registrationSuccess: "Регистрация успешна! Войдите в систему.",
+    codesCopied: "Коды скопированы в буфер обмена",
+    codesDownloaded: "Файл с кодами скачан",
+    passwordResetSuccess: "Пароль успешно изменён!",
+    invalidRecoveryCode: "Неверный формат резервного кода",
+    passwordTooShort: "Пароль должен содержать минимум 8 символов",
+  };
+
   const TOTP_PERIOD = 30;
   const CIRCLE_CIRCUMFERENCE = 2 * Math.PI * 38;
 
@@ -14,96 +78,71 @@ $(() => {
   let registeredRecoveryCodes = [];
   let totpAnimationFrame = null;
 
-  function getTotpProgress() {
+  const getTotpProgress = () => {
     const now = Date.now() / 1000;
     const elapsed = now % TOTP_PERIOD;
     return elapsed / TOTP_PERIOD;
-  }
+  };
 
-  function updateTotpTimer() {
-    const circle = document.getElementById("lock-progress-circle");
+  const updateTotpTimer = () => {
+    const circle = $(SELECTORS.lockProgressCircle).get(0);
     if (!circle) return;
-
     const progress = getTotpProgress();
     const offset = CIRCLE_CIRCUMFERENCE * (1 - progress);
     circle.style.strokeDashoffset = offset;
-
     totpAnimationFrame = requestAnimationFrame(updateTotpTimer);
-  }
+  };
 
-  function startTotpTimer() {
+  const startTotpTimer = () => {
     stopTotpTimer();
     updateTotpTimer();
-  }
+  };
 
-  function stopTotpTimer() {
+  const stopTotpTimer = () => {
     if (totpAnimationFrame) {
       cancelAnimationFrame(totpAnimationFrame);
       totpAnimationFrame = null;
     }
-  }
+  };
 
-  function resetCircle() {
-    const circle = document.getElementById("lock-progress-circle");
-    if (circle) {
-      circle.style.strokeDashoffset = CIRCLE_CIRCUMFERENCE;
-    }
-  }
+  const resetCircle = () => {
+    const circle = $(SELECTORS.lockProgressCircle).get(0);
+    if (circle) circle.style.strokeDashoffset = CIRCLE_CIRCUMFERENCE;
+  };
 
-  function initLoginState() {
-    const savedToken = sessionStorage.getItem(PARTIAL_TOKEN_KEY);
-    const savedUsername = sessionStorage.getItem(PARTIAL_USERNAME_KEY);
+  const savePartialToken = (token, username) => {
+    sessionStorage.setItem(STORAGE_KEYS.partialToken, token);
+    sessionStorage.setItem(STORAGE_KEYS.partialUsername, username);
+  };
 
-    if (savedToken && savedUsername) {
-      loginState.partialToken = savedToken;
-      loginState.username = savedUsername;
-      loginState.step = "2fa";
+  const clearPartialToken = () => {
+    sessionStorage.removeItem(STORAGE_KEYS.partialToken);
+    sessionStorage.removeItem(STORAGE_KEYS.partialUsername);
+  };
 
-      $("#login-username").val(savedUsername);
-      $("#credentials-section").addClass("hidden");
-      $("#totp-section").removeClass("hidden");
-      $("#login-submit").text("Подтвердить");
-
-      startTotpTimer();
-
-      setTimeout(() => {
-        const totpInput = document.getElementById("login-totp");
-        if (totpInput) totpInput.focus();
-      }, 100);
-    }
-  }
-
-  function savePartialToken(token, username) {
-    sessionStorage.setItem(PARTIAL_TOKEN_KEY, token);
-    sessionStorage.setItem(PARTIAL_USERNAME_KEY, username);
-  }
-
-  function clearPartialToken() {
-    sessionStorage.removeItem(PARTIAL_TOKEN_KEY);
-    sessionStorage.removeItem(PARTIAL_USERNAME_KEY);
-  }
-
-  function showForm(formId) {
-    $("#login-form, #register-form, #reset-password-form").addClass("hidden");
+  const showForm = (formId) => {
+    $(
+      `${SELECTORS.loginForm}, ${SELECTORS.registerForm}, ${SELECTORS.resetForm}`,
+    ).addClass("hidden");
     $(formId).removeClass("hidden");
 
-    $("#login-tab, #register-tab")
+    $(`${SELECTORS.loginTab}, ${SELECTORS.registerTab}`)
       .removeClass("text-gray-700 bg-gray-50 border-b-2 border-gray-500")
       .addClass("text-gray-400 hover:text-gray-600");
 
-    if (formId === "#login-form") {
-      $("#login-tab")
+    if (formId === SELECTORS.loginForm) {
+      $(SELECTORS.loginTab)
         .removeClass("text-gray-400 hover:text-gray-600")
         .addClass("text-gray-700 bg-gray-50 border-b-2 border-gray-500");
       resetLoginState();
-    } else if (formId === "#register-form") {
-      $("#register-tab")
+    } else if (formId === SELECTORS.registerForm) {
+      $(SELECTORS.registerTab)
         .removeClass("text-gray-400 hover:text-gray-600")
         .addClass("text-gray-700 bg-gray-50 border-b-2 border-gray-500");
     }
-  }
+  };
 
-  function resetLoginState() {
+  const resetLoginState = () => {
     clearPartialToken();
     stopTotpTimer();
     loginState = {
@@ -112,30 +151,68 @@ $(() => {
       username: "",
       rememberMe: false,
     };
-    $("#totp-section").addClass("hidden");
-    $("#login-totp").val("");
-    $("#credentials-section").removeClass("hidden");
-    $("#login-submit").text("Войти");
+    $(SELECTORS.totpSection).addClass("hidden");
+    $(SELECTORS.totpInput).val("");
+    $(SELECTORS.credentialsSection).removeClass("hidden");
+    $(SELECTORS.submitLogin).text(TEXTS.login);
     resetCircle();
-  }
+  };
 
-  $("#login-tab").on("click", () => showForm("#login-form"));
-  $("#register-tab").on("click", () => showForm("#register-form"));
-  $("#forgot-password-btn").on("click", () => showForm("#reset-password-form"));
-  $("#back-to-login-btn").on("click", () => showForm("#login-form"));
+  const checkPasswordMatch = (passwordId, confirmId, errorId) => {
+    const password = $(passwordId).val();
+    const confirm = $(confirmId).val();
+    const $error = $(errorId);
+    if (confirm && password !== confirm) {
+      $error.removeClass("hidden");
+      return false;
+    }
+    $error.addClass("hidden");
+    return true;
+  };
+
+  const saveTokensAndRedirect = (data, rememberMe) => {
+    const storage = rememberMe ? localStorage : sessionStorage;
+    const otherStorage = rememberMe ? sessionStorage : localStorage;
+    storage.setItem("access_token", data.access_token);
+    if (data.refresh_token)
+      storage.setItem("refresh_token", data.refresh_token);
+    otherStorage.removeItem("access_token");
+    otherStorage.removeItem("refresh_token");
+    window.location.href = "/";
+  };
+
+  const initLoginState = () => {
+    const savedToken = sessionStorage.getItem(STORAGE_KEYS.partialToken);
+    const savedUsername = sessionStorage.getItem(STORAGE_KEYS.partialUsername);
+    if (savedToken && savedUsername) {
+      loginState.partialToken = savedToken;
+      loginState.username = savedUsername;
+      loginState.step = "2fa";
+      $(SELECTORS.usernameLogin).val(savedUsername);
+      $(SELECTORS.credentialsSection).addClass("hidden");
+      $(SELECTORS.totpSection).removeClass("hidden");
+      $(SELECTORS.submitLogin).text(TEXTS.confirm);
+      startTotpTimer();
+      setTimeout(() => $(SELECTORS.totpInput).get(0)?.focus(), 100);
+    }
+  };
+
+  $(SELECTORS.loginTab).on("click", () => showForm(SELECTORS.loginForm));
+  $(SELECTORS.registerTab).on("click", () => showForm(SELECTORS.registerForm));
+  $(SELECTORS.forgotBtn).on("click", () => showForm(SELECTORS.resetForm));
+  $(SELECTORS.backToLoginBtn).on("click", () => showForm(SELECTORS.loginForm));
+  $(SELECTORS.backToCredentialsBtn).on("click", resetLoginState);
 
   $("body").on("click", ".toggle-password", function () {
-    const $btn = $(this);
-    const $input = $btn.siblings("input");
+    const $input = $(this).siblings("input");
     const isPassword = $input.attr("type") === "password";
     $input.attr("type", isPassword ? "text" : "password");
-    $btn.find("svg").toggleClass("hidden");
+    $(this).find("svg").toggleClass("hidden");
   });
 
-  $("#register-password").on("input", function () {
+  $(SELECTORS.registerPassword).on("input", function () {
     const password = $(this).val();
     let strength = 0;
-
     if (password.length >= 8) strength++;
     if (password.length >= 12) strength++;
     if (/[a-z]/.test(password) && /[A-Z]/.test(password)) strength++;
@@ -150,91 +227,64 @@ $(() => {
       { width: "80%", color: "bg-lime-500", text: "Хороший" },
       { width: "100%", color: "bg-green-500", text: "Отличный" },
     ];
-
     const level = levels[strength];
-    $("#password-strength-bar")
+    $(SELECTORS.passwordStrengthBar)
       .css("width", level.width)
-      .attr("class", "h-full transition-all duration-300 " + level.color);
-    $("#password-strength-text").text(level.text);
-
-    checkPasswordMatch();
+      .attr("class", `h-full transition-all duration-300 ${level.color}`);
+    $(SELECTORS.passwordStrengthText).text(level.text);
+    checkPasswordMatch(
+      SELECTORS.registerPassword,
+      SELECTORS.registerConfirm,
+      SELECTORS.passwordMatchError,
+    );
   });
 
-  function checkPasswordMatch() {
-    const password = $("#register-password").val();
-    const confirm = $("#register-password-confirm").val();
-    if (confirm && password !== confirm) {
-      $("#password-match-error").removeClass("hidden");
-      return false;
-    }
-    $("#password-match-error").addClass("hidden");
-    return true;
-  }
+  $(SELECTORS.registerConfirm).on("input", () =>
+    checkPasswordMatch(
+      SELECTORS.registerPassword,
+      SELECTORS.registerConfirm,
+      SELECTORS.passwordMatchError,
+    ),
+  );
 
-  $("#register-password-confirm").on("input", checkPasswordMatch);
-
-  function formatRecoveryCode(input) {
-    let value = input.value.toUpperCase().replace(/[^0-9A-F]/g, "");
+  $(SELECTORS.resetCode).on("input", function () {
+    let value = this.value.toUpperCase().replace(/[^0-9A-F]/g, "");
     let formatted = "";
     for (let i = 0; i < value.length && i < 16; i++) {
       if (i > 0 && i % 4 === 0) formatted += "-";
       formatted += value[i];
     }
-    input.value = formatted;
-  }
-
-  $("#reset-recovery-code").on("input", function () {
-    formatRecoveryCode(this);
+    this.value = formatted;
   });
 
-  $("#login-totp").on("input", function () {
+  $(SELECTORS.totpInput).on("input", function () {
     this.value = this.value.replace(/\D/g, "").slice(0, 6);
-    if (this.value.length === 6) {
-      $("#login-form").trigger("submit");
-    }
+    if (this.value.length === 6) $(SELECTORS.loginForm).trigger("submit");
   });
 
-  $("#back-to-credentials-btn").on("click", function () {
-    resetLoginState();
-  });
-
-  $("#login-form").on("submit", async function (event) {
+  $(SELECTORS.loginForm).on("submit", async function (event) {
     event.preventDefault();
-    const $submitBtn = $("#login-submit");
-
+    const $submitBtn = $(SELECTORS.submitLogin);
     if (loginState.step === "credentials") {
-      const username = $("#login-username").val();
-      const password = $("#login-password").val();
-      const rememberMe = $("#remember-me").prop("checked");
-
+      const username = $(SELECTORS.usernameLogin).val();
+      const password = $(SELECTORS.passwordLogin).val();
+      const rememberMe = $(SELECTORS.rememberMe).prop("checked");
       loginState.username = username;
       loginState.rememberMe = rememberMe;
-
       $submitBtn.prop("disabled", true).text("Вход...");
-
       try {
-        const formData = new URLSearchParams();
-        formData.append("username", username);
-        formData.append("password", password);
-
+        const formData = new URLSearchParams({ username, password });
         const data = await Api.postForm("/api/auth/token", formData);
-
         if (data.requires_2fa && data.partial_token) {
           loginState.partialToken = data.partial_token;
           loginState.step = "2fa";
-
           savePartialToken(data.partial_token, username);
-
-          $("#credentials-section").addClass("hidden");
-          $("#totp-section").removeClass("hidden");
-
+          $(SELECTORS.credentialsSection).addClass("hidden");
+          $(SELECTORS.totpSection).removeClass("hidden");
           startTotpTimer();
-
-          const totpInput = document.getElementById("login-totp");
-          if (totpInput) totpInput.focus();
-
-          $submitBtn.text("Подтвердить");
-          Utils.showToast("Введите код из приложения аутентификатора", "info");
+          $(SELECTORS.totpInput).get(0)?.focus();
+          $submitBtn.text(TEXTS.confirm);
+          Utils.showToast(TEXTS.enterTotp, "info");
         } else if (data.access_token) {
           clearPartialToken();
           saveTokensAndRedirect(data, rememberMe);
@@ -243,20 +293,15 @@ $(() => {
         Utils.showToast(error.message || "Ошибка входа", "error");
       } finally {
         $submitBtn.prop("disabled", false);
-        if (loginState.step === "credentials") {
-          $submitBtn.text("Войти");
-        }
+        if (loginState.step === "credentials") $submitBtn.text(TEXTS.login);
       }
     } else if (loginState.step === "2fa") {
-      const totpCode = $("#login-totp").val();
-
+      const totpCode = $(SELECTORS.totpInput).val();
       if (!totpCode || totpCode.length !== 6) {
         Utils.showToast("Введите 6-значный код", "error");
         return;
       }
-
-      $submitBtn.prop("disabled", true).text("Проверка...");
-
+      $submitBtn.prop("disabled", true).text(TEXTS.checking);
       try {
         const response = await fetch("/api/auth/2fa/verify", {
           method: "POST",
@@ -266,113 +311,93 @@ $(() => {
           },
           body: JSON.stringify({ code: totpCode }),
         });
-
         if (!response.ok) {
           const errorData = await response.json().catch(() => ({}));
-
           if (response.status === 401) {
             resetLoginState();
-            throw new Error(
-              "Время сессии истекло. Пожалуйста, войдите заново.",
-            );
+            throw new Error(TEXTS.sessionExpired);
           }
-
-          throw new Error(errorData.detail || "Неверный код");
+          throw new Error(errorData.detail || TEXTS.invalidCode);
         }
-
         const data = await response.json();
         clearPartialToken();
         stopTotpTimer();
         saveTokensAndRedirect(data, loginState.rememberMe);
       } catch (error) {
-        Utils.showToast(error.message || "Неверный код", "error");
-        $("#login-totp").val("");
-        const totpInput = document.getElementById("login-totp");
-        if (totpInput) totpInput.focus();
+        Utils.showToast(error.message || TEXTS.invalidCode, "error");
+        $(SELECTORS.totpInput).val("");
+        $(SELECTORS.totpInput).get(0)?.focus();
       } finally {
-        $submitBtn.prop("disabled", false).text("Подтвердить");
+        $submitBtn.prop("disabled", false).text(TEXTS.confirm);
       }
     }
   });
 
-  function saveTokensAndRedirect(data, rememberMe) {
-    const storage = rememberMe ? localStorage : sessionStorage;
-    const otherStorage = rememberMe ? sessionStorage : localStorage;
-
-    storage.setItem("access_token", data.access_token);
-    if (data.refresh_token) {
-      storage.setItem("refresh_token", data.refresh_token);
-    }
-
-    otherStorage.removeItem("access_token");
-    otherStorage.removeItem("refresh_token");
-
-    window.location.href = "/";
-  }
-
-  $("#register-form").on("submit", async function (event) {
+  $(SELECTORS.registerForm).on("submit", async function (event) {
     event.preventDefault();
-    const $submitBtn = $("#register-submit");
-    const pass = $("#register-password").val();
-    const confirm = $("#register-password-confirm").val();
-
+    const $submitBtn = $(SELECTORS.submitRegister);
+    const pass = $(SELECTORS.registerPassword).val();
+    const confirm = $(SELECTORS.registerConfirm).val();
     if (pass !== confirm) {
-      Utils.showToast("Пароли не совпадают", "error");
+      Utils.showToast(TEXTS.passwordsNotMatch, "error");
       return;
     }
-
     const userData = {
-      username: $("#register-username").val(),
-      email: $("#register-email").val(),
-      full_name: $("#register-fullname").val() || null,
+      username: $(SELECTORS.registerUsername).val(),
+      email: $(SELECTORS.registerEmail).val(),
+      full_name: $(SELECTORS.registerFullname).val() || null,
       password: pass,
     };
-
-    $submitBtn.prop("disabled", true).text("Регистрация...");
-
+    $submitBtn.prop("disabled", true).text(TEXTS.registering);
     try {
       const response = await Api.post("/api/auth/register", userData);
-
       if (response.recovery_codes && response.recovery_codes.codes) {
         registeredRecoveryCodes = response.recovery_codes.codes;
         showRecoveryCodesModal(registeredRecoveryCodes, userData.username);
       } else {
-        Utils.showToast("Регистрация успешна! Войдите в систему.", "success");
+        Utils.showToast(TEXTS.registrationSuccess, "success");
         setTimeout(() => {
-          showForm("#login-form");
-          $("#login-username").val(userData.username);
+          showForm(SELECTORS.loginForm);
+          $(SELECTORS.usernameLogin).val(userData.username);
         }, 1500);
       }
     } catch (error) {
+      if (error.detail && error.detail.error === "captcha_required") {
+        Utils.showToast(TEXTS.captchaRequired, "error");
+        const $capElement = $(SELECTORS.capWidget);
+        const $parent = $capElement.parent();
+        $capElement.remove();
+        $parent.append(
+          `<cap-widget id="cap" data-cap-api-endpoint="/api/cap/" style="--cap-widget-width: 100%;"></cap-widget>`,
+        );
+        return;
+      }
       let msg = error.message;
       if (error.detail && Array.isArray(error.detail)) {
         msg = error.detail.map((e) => e.msg).join(". ");
       }
       Utils.showToast(msg || "Ошибка регистрации", "error");
     } finally {
-      $submitBtn.prop("disabled", false).text("Зарегистрироваться");
+      $submitBtn
+        .prop("disabled", false)
+        .text(TEXTS.registering.replace("...", ""));
     }
   });
 
-  function showRecoveryCodesModal(codes, username) {
-    const $list = $("#recovery-codes-list");
+  const showRecoveryCodesModal = (codes, username) => {
+    const $list = $(SELECTORS.recoveryList);
     $list.empty();
-
     codes.forEach((code, index) => {
-      $list.append(`
-        <div class="py-1 px-2 bg-white rounded border select-all font-mono">
-          ${index + 1}. ${Utils.escapeHtml(code)}
-        </div>
-      `);
+      $list.append(
+        `<div class="py-1 px-2 bg-white rounded border select-all font-mono">${index + 1}. ${Utils.escapeHtml(code)}</div>`,
+      );
     });
+    $(SELECTORS.codesSavedCheckbox).prop("checked", false);
+    $(SELECTORS.closeRecoveryBtn).prop("disabled", true);
+    $(SELECTORS.recoveryModal).data("username", username).removeClass("hidden");
+  };
 
-    $("#codes-saved-checkbox").prop("checked", false);
-    $("#close-recovery-modal-btn").prop("disabled", true);
-    $("#recovery-codes-modal").data("username", username);
-    $("#recovery-codes-modal").removeClass("hidden");
-  }
-
-  function renderRecoveryCodesStatus(usedCodes) {
+  const renderRecoveryCodesStatus = (usedCodes) => {
     return usedCodes
       .map((used, index) => {
         const codeDisplay = "████-████-████-████";
@@ -380,31 +405,25 @@ $(() => {
           ? "text-gray-300 line-through"
           : "text-green-600";
         const statusIcon = used ? "✗" : "✓";
-        return `
-          <div class="flex items-center justify-between py-1 px-2 rounded ${used ? "bg-gray-50" : "bg-green-50"}">
-            <span class="font-mono ${statusClass}">${index + 1}. ${codeDisplay}</span>
-            <span class="${used ? "text-gray-400" : "text-green-600"}">${statusIcon}</span>
-          </div>
-        `;
+        return `<div class="flex items-center justify-between py-1 px-2 rounded ${used ? "bg-gray-50" : "bg-green-50"}"><span class="font-mono ${statusClass}">${index + 1}. ${codeDisplay}</span><span class="${used ? "text-gray-400" : "text-green-600"}">${statusIcon}</span></div>`;
       })
       .join("");
-  }
+  };
 
-  $("#codes-saved-checkbox").on("change", function () {
-    $("#close-recovery-modal-btn").prop("disabled", !this.checked);
+  $(SELECTORS.codesSavedCheckbox).on("change", function () {
+    $(SELECTORS.closeRecoveryBtn).prop("disabled", !this.checked);
   });
 
-  $("#copy-codes-btn").on("click", function () {
+  $(SELECTORS.copyCodesBtn).on("click", function () {
     const codesText = registeredRecoveryCodes.join("\n");
-    navigator.clipboard.writeText(codesText).then(() => {
-      Utils.showToast("Коды скопированы в буфер обмена", "success");
-    });
+    navigator.clipboard
+      .writeText(codesText)
+      .then(() => Utils.showToast(TEXTS.codesCopied, "success"));
   });
 
-  $("#download-codes-btn").on("click", function () {
-    const username = $("#recovery-codes-modal").data("username") || "user";
+  $(SELECTORS.downloadCodesBtn).on("click", function () {
+    const username = $(SELECTORS.recoveryModal).data("username") || "user";
     const codesText = `Резервные коды для аккаунта: ${username}\nДата: ${new Date().toLocaleString()}\n\n${registeredRecoveryCodes.map((c, i) => `${i + 1}. ${c}`).join("\n")}\n\nХраните эти коды в надёжном месте!`;
-
     const blob = new Blob([codesText], { type: "text/plain;charset=utf-8" });
     const url = URL.createObjectURL(blob);
     const a = document.createElement("a");
@@ -412,69 +431,54 @@ $(() => {
     a.download = `recovery-codes-${username}.txt`;
     a.click();
     URL.revokeObjectURL(url);
-
-    Utils.showToast("Файл с кодами скачан", "success");
+    Utils.showToast(TEXTS.codesDownloaded, "success");
   });
 
-  $("#close-recovery-modal-btn").on("click", function () {
-    const username = $("#recovery-codes-modal").data("username");
-    $("#recovery-codes-modal").addClass("hidden");
-
-    Utils.showToast("Регистрация успешна! Войдите в систему.", "success");
-    showForm("#login-form");
-    $("#login-username").val(username);
+  $(SELECTORS.closeRecoveryBtn).on("click", function () {
+    const username = $(SELECTORS.recoveryModal).data("username");
+    $(SELECTORS.recoveryModal).addClass("hidden");
+    Utils.showToast(TEXTS.registrationSuccess, "success");
+    showForm(SELECTORS.loginForm);
+    $(SELECTORS.usernameLogin).val(username);
   });
 
-  function checkResetPasswordMatch() {
-    const password = $("#reset-new-password").val();
-    const confirm = $("#reset-confirm-password").val();
-    if (confirm && password !== confirm) {
-      $("#reset-password-match-error").removeClass("hidden");
-      return false;
-    }
-    $("#reset-password-match-error").addClass("hidden");
-    return true;
-  }
+  $(SELECTORS.resetConfirmPassword).on("input", () =>
+    checkPasswordMatch(
+      SELECTORS.resetNewPassword,
+      SELECTORS.resetConfirmPassword,
+      SELECTORS.resetMatchError,
+    ),
+  );
 
-  $("#reset-confirm-password").on("input", checkResetPasswordMatch);
-
-  $("#reset-password-form").on("submit", async function (event) {
+  $(SELECTORS.resetForm).on("submit", async function (event) {
     event.preventDefault();
-    const $submitBtn = $("#reset-submit");
-
-    const newPassword = $("#reset-new-password").val();
-    const confirmPassword = $("#reset-confirm-password").val();
-
+    const $submitBtn = $(SELECTORS.submitReset);
+    const newPassword = $(SELECTORS.resetNewPassword).val();
+    const confirmPassword = $(SELECTORS.resetConfirmPassword).val();
     if (newPassword !== confirmPassword) {
-      Utils.showToast("Пароли не совпадают", "error");
+      Utils.showToast(TEXTS.passwordsNotMatch, "error");
       return;
     }
-
     if (newPassword.length < 8) {
-      Utils.showToast("Пароль должен содержать минимум 8 символов", "error");
+      Utils.showToast(TEXTS.passwordTooShort, "error");
       return;
     }
-
     const data = {
-      username: $("#reset-username").val(),
-      recovery_code: $("#reset-recovery-code").val().toUpperCase(),
+      username: $(SELECTORS.resetUsername).val(),
+      recovery_code: $(SELECTORS.resetCode).val().toUpperCase(),
       new_password: newPassword,
     };
-
     if (
       !/^[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}$/.test(
         data.recovery_code,
       )
     ) {
-      Utils.showToast("Неверный формат резервного кода", "error");
+      Utils.showToast(TEXTS.invalidRecoveryCode, "error");
       return;
     }
-
-    $submitBtn.prop("disabled", true).text("Сброс...");
-
+    $submitBtn.prop("disabled", true).text(TEXTS.resetting);
     try {
       const response = await Api.post("/api/auth/password/reset", data);
-
       showPasswordResetResult(response, data.username);
     } catch (error) {
       Utils.showToast(error.message || "Ошибка сброса пароля", "error");
@@ -482,9 +486,8 @@ $(() => {
     }
   });
 
-  function showPasswordResetResult(response, username) {
-    const $form = $("#reset-password-form");
-
+  const showPasswordResetResult = (response, username) => {
+    const $form = $(SELECTORS.resetForm);
     $form.html(`
       <div class="text-center mb-4">
         <div class="w-16 h-16 mx-auto bg-green-100 rounded-full flex items-center justify-center mb-3">
@@ -492,22 +495,19 @@ $(() => {
             <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"></path>
           </svg>
         </div>
-        <h3 class="text-lg font-semibold text-gray-800">Пароль успешно изменён!</h3>
+        <h3 class="text-lg font-semibold text-gray-800">${TEXTS.passwordResetSuccess}</h3>
       </div>
-
       <div class="mb-4">
         <p class="text-sm text-gray-600 mb-2 text-center">
           Осталось резервных кодов: <strong class="${response.remaining <= 2 ? "text-red-600" : "text-green-600"}">${response.remaining}</strong> из ${response.total}
         </p>
-
         ${
           response.should_regenerate
             ? `
           <div class="bg-yellow-50 border border-yellow-200 rounded-lg p-3 mb-3">
             <p class="text-sm text-yellow-800 flex items-center gap-2">
               <svg class="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
-                  d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path>
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path>
               </svg>
               Рекомендуем сгенерировать новые коды в профиле
             </p>
@@ -515,12 +515,10 @@ $(() => {
         `
             : ""
         }
-
         <div class="bg-gray-50 rounded-lg p-3 space-y-1 max-h-48 overflow-y-auto">
           <p class="text-xs text-gray-500 mb-2 text-center">Статус резервных кодов:</p>
           ${renderRecoveryCodesStatus(response.used_codes)}
         </div>
-
         ${
           response.generated_at
             ? `
@@ -531,23 +529,26 @@ $(() => {
             : ""
         }
       </div>
-
-      <button type="button" id="goto-login-after-reset"
-        class="w-full bg-gray-500 text-white py-3 px-4 rounded-lg hover:bg-gray-600 transition duration-200 font-medium">
+      <button type="button" id="goto-login-after-reset" class="w-full bg-gray-500 text-white py-3 px-4 rounded-lg hover:bg-gray-600 transition duration-200 font-medium">
         Перейти к входу
       </button>
     `);
-
     $form.off("submit");
-
     $("#goto-login-after-reset").on("click", function () {
       location.reload();
       setTimeout(() => {
-        showForm("#login-form");
-        $("#login-username").val(username);
+        showForm(SELECTORS.loginForm);
+        $(SELECTORS.usernameLogin).val(username);
       }, 100);
     });
-  }
+  };
 
   initLoginState();
+
+  const widget = $(SELECTORS.capWidget).get(0);
+  if (widget && widget.shadowRoot) {
+    const style = document.createElement("style");
+    style.textContent = `.credits { right: 20px !important; }`;
+    $(widget.shadowRoot).append(style);
+  }
 });
diff --git a/library_service/static/page/books.js b/library_service/static/page/books.js
index 2fef73f..08bc32e 100644
--- a/library_service/static/page/books.js
+++ b/library_service/static/page/books.js
@@ -1,4 +1,25 @@
-$(document).ready(() => {
+$(() => {
+  const SELECTORS = {
+    booksContainer: "#books-container",
+    paginationContainer: "#pagination-container",
+    bookSearchInput: "#book-search-input",
+    authorSearchInput: "#author-search-input",
+    authorDropdown: "#author-dropdown",
+    selectedAuthorsContainer: "#selected-authors-container",
+    genresList: "#genres-list",
+    applyFiltersBtn: "#apply-filters-btn",
+    resetFiltersBtn: "#reset-filters-btn",
+    adminActions: "#admin-actions",
+    pagesMin: "#pages-min",
+    pagesMax: "#pages-max",
+  };
+
+  const TEMPLATES = {
+    bookCard: document.getElementById("book-card-template"),
+    genreBadge: document.getElementById("genre-badge-template"),
+    emptyState: document.getElementById("empty-state-template"),
+  };
+
   const STATUS_CONFIG = {
     active: {
       label: "Доступна",
@@ -27,6 +48,40 @@ $(document).ready(() => {
     },
   };
 
+  const PAGE_SIZE = 12;
+
+  const STATE = {
+    selectedAuthors: new Map(),
+    selectedGenres: new Map(),
+    currentPage: 1,
+    totalBooks: 0,
+  };
+
+  const urlParams = new URLSearchParams(window.location.search);
+  const INITIAL_FILTERS = {
+    search: urlParams.get("q") || "",
+    authorIds: new Set(urlParams.getAll("author_id")),
+    genreIds: new Set(urlParams.getAll("genre_id")),
+  };
+
+  if (INITIAL_FILTERS.search) {
+    $(SELECTORS.bookSearchInput).val(INITIAL_FILTERS.search);
+  }
+
+  const LOADING_SKELETON_HTML = `<div class="space-y-4">${Array.from(
+    { length: 3 },
+    () => `
+      <div class="bg-white p-4 rounded-lg shadow-md animate-pulse">
+        <div class="h-6 bg-gray-200 rounded w-3/4 mb-2"></div>
+        <div class="h-4 bg-gray-200 rounded w-1/4 mb-2"></div>
+        <div class="h-4 bg-gray-200 rounded w-full mb-2"></div>
+      </div>
+    `,
+  ).join("")}</div>`;
+
+  const USER_CAN_MANAGE =
+    typeof window.canManage === "function" && window.canManage();
+
   function getStatusConfig(status) {
     return (
       STATUS_CONFIG[status] || {
@@ -37,224 +92,191 @@ $(document).ready(() => {
     );
   }
 
-  let selectedAuthors = new Map();
-  let selectedGenres = new Map();
-  let currentPage = 1;
-  let pageSize = 12;
-  let totalBooks = 0;
-
-  const urlParams = new URLSearchParams(window.location.search);
-  const genreIdsFromUrl = urlParams.getAll("genre_id");
-  const authorIdsFromUrl = urlParams.getAll("author_id");
-  const searchFromUrl = urlParams.get("q");
-
-  if (searchFromUrl) $("#book-search-input").val(searchFromUrl);
-
-  Promise.all([Api.get("/api/authors"), Api.get("/api/genres")])
-    .then(([authorsData, genresData]) => {
-      initAuthors(authorsData.authors);
-      initGenres(genresData.genres);
-      initializeAuthorDropdownListeners();
-      renderChips();
-      loadBooks();
-    })
-    .catch((error) => {
-      console.error(error);
-      Utils.showToast("Ошибка загрузки данных", "error");
-    });
-
   function initAuthors(authors) {
-    const $dropdown = $("#author-dropdown");
-    authors.forEach((author) => {
-      $("<div>")
-        .addClass(
-          "p-2 hover:bg-gray-100 cursor-pointer author-item transition-colors",
-        )
-        .attr("data-id", author.id)
-        .attr("data-name", author.name)
-        .text(author.name)
-        .appendTo($dropdown);
+    const $dropdown = $(SELECTORS.authorDropdown);
+    const fragment = document.createDocumentFragment();
 
-      if (authorIdsFromUrl.includes(String(author.id))) {
-        selectedAuthors.set(author.id, author.name);
+    authors.forEach((author) => {
+      const item = document.createElement("div");
+      item.className =
+        "p-2 hover:bg-gray-100 cursor-pointer author-item transition-colors";
+      item.dataset.id = author.id;
+      item.dataset.name = author.name;
+      item.textContent = author.name;
+      fragment.appendChild(item);
+
+      if (INITIAL_FILTERS.authorIds.has(String(author.id))) {
+        STATE.selectedAuthors.set(author.id, author.name);
       }
     });
+
+    $dropdown.empty().append(fragment);
   }
 
   function initGenres(genres) {
-    const $list = $("#genres-list");
-    genres.forEach((genre) => {
-      const isChecked = genreIdsFromUrl.includes(String(genre.id));
-      if (isChecked) selectedGenres.set(genre.id, genre.name);
+    const $list = $(SELECTORS.genresList);
+    const canManage = USER_CAN_MANAGE;
+    let html = "";
 
-      const editButton = window.canManage()
+    genres.forEach((genre) => {
+      const isChecked = INITIAL_FILTERS.genreIds.has(String(genre.id));
+      if (isChecked) {
+        STATE.selectedGenres.set(genre.id, genre.name);
+      }
+      const safeName = Utils.escapeHtml(genre.name);
+      const editButton = canManage
         ? `<a href="/genre/${genre.id}/edit" class="ml-auto mr-2 p-1 text-gray-400 hover:text-gray-600 transition-colors" onclick="event.stopPropagation();" title="Редактировать жанр">
              <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15.232 5.232l3.536 3.536m-2.036-5.036a2.5 2.5 0 113.536 3.536L6.5 21.036H3v-3.572L16.732 3.732z"></path>
              </svg>
            </a>`
         : "";
-
-      $list.append(`
+      html += `
         <li class="mb-1">
           <div class="flex items-center">
             <label class="custom-checkbox flex items-center flex-1">
-              <input type="checkbox" data-id="${genre.id}" data-name="${Utils.escapeHtml(genre.name)}" ${isChecked ? "checked" : ""} />
-              <span class="checkmark"></span> ${Utils.escapeHtml(genre.name)}
+              <input type="checkbox" data-id="${genre.id}" data-name="${safeName}" ${
+                isChecked ? "checked" : ""
+              } />
+              <span class="checkmark"></span> ${safeName}
             </label>
             ${editButton}
           </div>
         </li>
-      `);
+      `;
     });
 
-    $list.on("change", "input", function () {
-      const id = parseInt($(this).data("id"));
-      const name = $(this).data("name");
-      this.checked ? selectedGenres.set(id, name) : selectedGenres.delete(id);
-    });
+    $list.html(html);
 
     $list.on("change", "input", function () {
-      const id = parseInt($(this).data("id"));
+      const id = parseInt($(this).data("id"), 10);
       const name = $(this).data("name");
-      this.checked ? selectedGenres.set(id, name) : selectedGenres.delete(id);
+      if (this.checked) {
+        STATE.selectedGenres.set(id, name);
+      } else {
+        STATE.selectedGenres.delete(id);
+      }
     });
   }
 
+  function getTotalPages() {
+    return Math.max(1, Math.ceil(STATE.totalBooks / PAGE_SIZE));
+  }
+
   function loadBooks() {
-    const searchQuery = $("#book-search-input").val().trim();
-    const params = new URLSearchParams();
-
-    params.append("q", searchQuery);
-    selectedAuthors.forEach((_, id) => params.append("author_ids", id));
-    selectedGenres.forEach((_, id) => params.append("genre_ids", id));
+    const searchQuery = $(SELECTORS.bookSearchInput).val().trim();
+    const $minPages = $(SELECTORS.pagesMin);
+    const $maxPages = $(SELECTORS.pagesMax);
+    const minPages = $minPages.length ? $minPages.val() : "";
+    const maxPages = $maxPages.length ? $maxPages.val() : "";
 
+    const apiParams = new URLSearchParams();
     const browserParams = new URLSearchParams();
-    browserParams.append("q", searchQuery);
-    selectedAuthors.forEach((_, id) => browserParams.append("author_id", id));
-    selectedGenres.forEach((_, id) => browserParams.append("genre_id", id));
+
+    if (searchQuery) {
+      apiParams.append("q", searchQuery);
+      browserParams.append("q", searchQuery);
+    }
+
+    if (minPages && minPages > 0) {
+      apiParams.append("min_page_count", minPages);
+      browserParams.append("min_page_count", minPages);
+    }
+
+    if (maxPages && maxPages < 2000) {
+      apiParams.append("max_page_count", maxPages);
+      browserParams.append("max_page_count", maxPages);
+    }
+
+    STATE.selectedAuthors.forEach((_, id) => {
+      apiParams.append("author_ids", id);
+      browserParams.append("author_id", id);
+    });
+
+    STATE.selectedGenres.forEach((_, id) => {
+      apiParams.append("genre_ids", id);
+      browserParams.append("genre_id", id);
+    });
+
+    apiParams.append("page", STATE.currentPage);
+    apiParams.append("size", PAGE_SIZE);
 
     const newUrl =
       window.location.pathname +
       (browserParams.toString() ? `?${browserParams.toString()}` : "");
     window.history.replaceState({}, "", newUrl);
 
-    params.append("page", currentPage);
-    params.append("size", pageSize);
-
     showLoadingState();
 
-    Api.get(`/api/books/filter?${params.toString()}`)
+    Api.get(`/api/books/filter?${apiParams.toString()}`)
       .then((data) => {
-        totalBooks = data.total;
-        renderBooks(data.books);
+        STATE.totalBooks = data.total || 0;
+        renderBooks(data.books || []);
         renderPagination();
       })
       .catch((error) => {
         console.error(error);
         Utils.showToast("Не удалось загрузить книги", "error");
-        $("#books-container").html(
-          document.getElementById("empty-state-template").innerHTML,
+        $(SELECTORS.booksContainer).html(
+          TEMPLATES.emptyState.content.cloneNode(true),
         );
       });
   }
 
   function renderBooks(books) {
-    const $container = $("#books-container");
-    const tpl = document.getElementById("book-card-template");
-    const emptyTpl = document.getElementById("empty-state-template");
-    const badgeTpl = document.getElementById("genre-badge-template");
-
+    const $container = $(SELECTORS.booksContainer);
     $container.empty();
 
-    if (books.length === 0) {
-      $container.append(emptyTpl.content.cloneNode(true));
+    if (!books.length) {
+      $container.append(TEMPLATES.emptyState.content.cloneNode(true));
       return;
     }
 
-    books.forEach((book) => {
-      const clone = tpl.content.cloneNode(true);
-      const card = clone.querySelector(".book-card");
+    const fragment = document.createDocumentFragment();
 
+    books.forEach((book) => {
+      const clone = TEMPLATES.bookCard.content.cloneNode(true);
+      const card = clone.querySelector(".book-card");
       card.dataset.id = book.id;
-      clone.querySelector(".book-title").textContent = book.title;
-      clone.querySelector(".book-authors").textContent =
-        book.authors.map((a) => a.name).join(", ") || "Автор неизвестен";
+
+      const titleEl = clone.querySelector(".book-title");
+      const authorsEl = clone.querySelector(".book-authors");
+      const pageCountWrapper = clone.querySelector(".book-page-count");
+      const pageCountValue =
+        pageCountWrapper.querySelector(".page-count-value");
+      const descEl = clone.querySelector(".book-desc");
+      const statusEl = clone.querySelector(".book-status");
+      const genresContainer = clone.querySelector(".book-genres");
+
+      titleEl.textContent = book.title;
+      authorsEl.textContent =
+        (book.authors && book.authors.map((a) => a.name).join(", ")) ||
+        "Автор неизвестен";
+
       if (book.page_count && book.page_count > 0) {
-        const pageEl = clone.querySelector(".book-page-count");
-        pageEl.querySelector(".page-count-value").textContent = book.page_count;
-        pageEl.classList.remove("hidden");
+        pageCountValue.textContent = book.page_count;
+        pageCountWrapper.classList.remove("hidden");
       }
-      clone.querySelector(".book-desc").textContent = book.description || "";
+
+      descEl.textContent = book.description || "";
 
       const statusConfig = getStatusConfig(book.status);
-      const statusEl = clone.querySelector(".book-status");
       statusEl.textContent = statusConfig.label;
       statusEl.classList.add(statusConfig.bgClass, statusConfig.textClass);
 
-      const genresContainer = clone.querySelector(".book-genres");
-      book.genres.forEach((g) => {
-        const badge = badgeTpl.content.cloneNode(true);
-        const span = badge.querySelector("span");
-        span.textContent = g.name;
-        genresContainer.appendChild(badge);
-      });
-
-      $container.append(clone);
-    });
-  }
-
-  function renderPagination() {
-    $("#pagination-container").empty();
-    const totalPages = Math.ceil(totalBooks / pageSize);
-    if (totalPages <= 1) return;
-
-    const $pagination = $(`
-            <div class="flex justify-center items-center gap-2 mt-6 mb-4">
-                <button id="prev-page" class="px-3 py-2 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed" ${currentPage === 1 ? "disabled" : ""}>&larr;</button>
-                <div id="page-numbers" class="flex gap-1"></div>
-                <button id="next-page" class="px-3 py-2 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed" ${currentPage === totalPages ? "disabled" : ""}>&rarr;</button>
-            </div>
-        `);
-
-    const $pageNumbers = $pagination.find("#page-numbers");
-    const pages = generatePageNumbers(currentPage, totalPages);
-
-    pages.forEach((page) => {
-      if (page === "...") {
-        $pageNumbers.append(`<span class="px-3 py-2 text-gray-500">...</span>`);
-      } else {
-        const isActive = page === currentPage;
-        $pageNumbers.append(`
-                    <button class="page-btn px-3 py-2 rounded-lg transition-colors ${isActive ? "bg-gray-600 text-white" : "bg-white border border-gray-300 hover:bg-gray-50"}" data-page="${page}">${page}</button>
-                `);
+      if (Array.isArray(book.genres)) {
+        book.genres.forEach((g) => {
+          const badge = TEMPLATES.genreBadge.content.cloneNode(true);
+          const span = badge.querySelector("span");
+          span.textContent = g.name;
+          genresContainer.appendChild(badge);
+        });
       }
+
+      fragment.appendChild(clone);
     });
 
-    $("#pagination-container").append($pagination);
-
-    $("#prev-page").on("click", function () {
-      if (currentPage > 1) {
-        currentPage--;
-        loadBooks();
-        scrollToTop();
-      }
-    });
-    $("#next-page").on("click", function () {
-      if (currentPage < totalPages) {
-        currentPage++;
-        loadBooks();
-        scrollToTop();
-      }
-    });
-    $(".page-btn").on("click", function () {
-      const page = parseInt($(this).data("page"));
-      if (page !== currentPage) {
-        currentPage = page;
-        loadBooks();
-        scrollToTop();
-      }
-    });
+    $container.append(fragment);
   }
 
   function generatePageNumbers(current, total) {
@@ -274,49 +296,81 @@ $(document).ready(() => {
     return pages;
   }
 
+  function renderPagination() {
+    const totalPages = getTotalPages();
+    const $container = $(SELECTORS.paginationContainer);
+    $container.empty();
+
+    if (totalPages <= 1) {
+      return;
+    }
+
+    const pages = generatePageNumbers(STATE.currentPage, totalPages);
+    let pagesHtml = "";
+
+    pages.forEach((page) => {
+      if (page === "...") {
+        pagesHtml += `<span class="px-3 py-2 text-gray-500">...</span>`;
+      } else {
+        const isActive = page === STATE.currentPage;
+        pagesHtml += `<button class="page-btn px-3 py-2 rounded-lg transition-colors ${
+          isActive
+            ? "bg-gray-600 text-white"
+            : "bg-white border border-gray-300 hover:bg-gray-50"
+        }" data-page="${page}">${page}</button>`;
+      }
+    });
+
+    const html = `
+      <div class="flex justify-center items-center gap-2 mt-6 mb-4">
+        <button id="prev-page" class="px-3 py-2 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed" ${
+          STATE.currentPage === 1 ? "disabled" : ""
+        }>&larr;</button>
+        <div id="page-numbers" class="flex gap-1">${pagesHtml}</div>
+        <button id="next-page" class="px-3 py-2 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed" ${
+          STATE.currentPage === totalPages ? "disabled" : ""
+        }>&rarr;</button>
+      </div>
+    `;
+
+    $container.html(html);
+  }
+
   function scrollToTop() {
     window.scrollTo({ top: 0, behavior: "smooth" });
   }
 
   function showLoadingState() {
-    $("#books-container").html(`
-            <div class="space-y-4">
-                ${Array(3)
-                  .fill()
-                  .map(
-                    () => `
-                    <div class="bg-white p-4 rounded-lg shadow-md animate-pulse">
-                        <div class="h-6 bg-gray-200 rounded w-3/4 mb-2"></div>
-                        <div class="h-4 bg-gray-200 rounded w-1/4 mb-2"></div>
-                        <div class="h-4 bg-gray-200 rounded w-full mb-2"></div>
-                    </div>
-                `,
-                  )
-                  .join("")}
-            </div>
-        `);
+    $(SELECTORS.booksContainer).html(LOADING_SKELETON_HTML);
   }
 
-  function renderChips() {
-    const $container = $("#selected-authors-container");
-    const $dropdown = $("#author-dropdown");
-
+  function renderSelectedAuthors() {
+    const $container = $(SELECTORS.selectedAuthorsContainer);
+    const $dropdown = $(SELECTORS.authorDropdown);
     $container.empty();
 
-    selectedAuthors.forEach((name, id) => {
-      $(`<span class="author-chip inline-flex items-center bg-gray-600 text-white text-sm font-medium px-2.5 pt-0.5 pb-1 rounded-full">
-            ${Utils.escapeHtml(name)}
-            <button type="button" class="remove-author mt-0.5 ml-2 inline-flex items-center justify-center text-gray-300 hover:text-white hover:bg-gray-400 rounded-full w-4 h-4 transition-colors" data-id="${id}">
-                <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
-                </svg>
-            </button>
-        </span>`).appendTo($container);
+    const fragment = document.createDocumentFragment();
+
+    STATE.selectedAuthors.forEach((name, id) => {
+      const wrapper = document.createElement("span");
+      wrapper.className =
+        "author-chip inline-flex items-center bg-gray-600 text-white text-sm font-medium px-2.5 pt-0.5 pb-1 rounded-full";
+      wrapper.innerHTML = `
+        ${Utils.escapeHtml(name)}
+        <button type="button" class="remove-author mt-0.5 ml-2 inline-flex items-center justify-center text-gray-300 hover:text-white hover:bg-gray-400 rounded-full w-4 h-4 transition-colors" data-id="${id}">
+          <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path>
+          </svg>
+        </button>
+      `;
+      fragment.appendChild(wrapper);
     });
 
+    $container.append(fragment);
+
     $dropdown.find(".author-item").each(function () {
-      const id = parseInt($(this).data("id"));
-      if (selectedAuthors.has(id)) {
+      const id = parseInt($(this).data("id"), 10);
+      if (STATE.selectedAuthors.has(id)) {
         $(this)
           .addClass("bg-gray-200 text-gray-900 font-semibold")
           .removeClass("hover:bg-gray-100");
@@ -329,11 +383,11 @@ $(document).ready(() => {
   }
 
   function initializeAuthorDropdownListeners() {
-    const $input = $("#author-search-input");
-    const $dropdown = $("#author-dropdown");
-    const $container = $("#selected-authors-container");
+    const $input = $(SELECTORS.authorSearchInput);
+    const $dropdown = $(SELECTORS.authorDropdown);
+    const $container = $(SELECTORS.selectedAuthorsContainer);
 
-    $input.on("focus", function () {
+    $input.on("focus", () => {
       $dropdown.removeClass("hidden");
     });
 
@@ -349,7 +403,7 @@ $(document).ready(() => {
     $(document).on("click", function (e) {
       if (
         !$(e.target).closest(
-          "#author-search-input, #author-dropdown, #selected-authors-container",
+          `${SELECTORS.authorSearchInput}, ${SELECTORS.authorDropdown}, ${SELECTORS.selectedAuthorsContainer}`,
         ).length
       ) {
         $dropdown.addClass("hidden");
@@ -358,61 +412,108 @@ $(document).ready(() => {
 
     $dropdown.on("click", ".author-item", function (e) {
       e.stopPropagation();
-      const id = parseInt($(this).data("id"));
+      const id = parseInt($(this).data("id"), 10);
       const name = $(this).data("name");
 
-      if (selectedAuthors.has(id)) {
-        selectedAuthors.delete(id);
+      if (STATE.selectedAuthors.has(id)) {
+        STATE.selectedAuthors.delete(id);
       } else {
-        selectedAuthors.set(id, name);
+        STATE.selectedAuthors.set(id, name);
       }
 
       $input.val("");
       $dropdown.find(".author-item").show();
-      renderChips();
+      renderSelectedAuthors();
       $input[0].focus();
     });
 
     $container.on("click", ".remove-author", function (e) {
       e.stopPropagation();
-      const id = parseInt($(this).data("id"));
-      selectedAuthors.delete(id);
-      renderChips();
+      const id = parseInt($(this).data("id"), 10);
+      STATE.selectedAuthors.delete(id);
+      renderSelectedAuthors();
     });
   }
 
-  $("#books-container").on("click", ".book-card", function () {
-    window.location.href = `/book/${$(this).data("id")}`;
+  $(SELECTORS.booksContainer).on("click", ".book-card", function () {
+    const id = $(this).data("id");
+    if (id) {
+      window.location.href = `/book/${id}`;
+    }
   });
 
-  $("#apply-filters-btn").on("click", function () {
-    currentPage = 1;
+  $(SELECTORS.applyFiltersBtn).on("click", function () {
+    STATE.currentPage = 1;
     loadBooks();
   });
 
-  $("#reset-filters-btn").on("click", function () {
-    $("#book-search-input").val("");
-    selectedAuthors.clear();
-    selectedGenres.clear();
-    $("#genres-list input").prop("checked", false);
-    renderChips();
-    currentPage = 1;
+  $(SELECTORS.resetFiltersBtn).on("click", function () {
+    $(SELECTORS.bookSearchInput).val("");
+    STATE.selectedAuthors.clear();
+    STATE.selectedGenres.clear();
+    $(`${SELECTORS.genresList} input`).prop("checked", false);
+
+    const $min = $(SELECTORS.pagesMin);
+    const $max = $(SELECTORS.pagesMax);
+    if ($min.length && $max.length) {
+      const minDefault = $min.attr("min");
+      const maxDefault = $max.attr("max");
+      if (minDefault !== undefined) $min.val(minDefault).trigger("input");
+      if (maxDefault !== undefined) $max.val(maxDefault).trigger("input");
+    }
+
+    renderSelectedAuthors();
+    STATE.currentPage = 1;
     loadBooks();
   });
 
-  $("#book-search-input").on("keypress", function (e) {
+  $(SELECTORS.bookSearchInput).on("keypress", function (e) {
     if (e.which === 13) {
-      currentPage = 1;
+      STATE.currentPage = 1;
       loadBooks();
     }
   });
 
-  function showAdminControls() {
-    if (window.canManage()) {
-      $("#admin-actions").removeClass("hidden");
+  $(SELECTORS.paginationContainer).on("click", "#prev-page", function () {
+    if (STATE.currentPage > 1) {
+      STATE.currentPage -= 1;
+      loadBooks();
+      scrollToTop();
     }
+  });
+
+  $(SELECTORS.paginationContainer).on("click", "#next-page", function () {
+    const totalPages = getTotalPages();
+    if (STATE.currentPage < totalPages) {
+      STATE.currentPage += 1;
+      loadBooks();
+      scrollToTop();
+    }
+  });
+
+  $(SELECTORS.paginationContainer).on("click", ".page-btn", function () {
+    const page = parseInt($(this).data("page"), 10);
+    if (page && page !== STATE.currentPage) {
+      STATE.currentPage = page;
+      loadBooks();
+      scrollToTop();
+    }
+  });
+
+  if (USER_CAN_MANAGE) {
+    $(SELECTORS.adminActions).removeClass("hidden");
   }
 
-  showAdminControls();
-  setTimeout(showAdminControls, 100);
+  Promise.all([Api.get("/api/authors"), Api.get("/api/genres")])
+    .then(([authorsData, genresData]) => {
+      initAuthors(authorsData.authors || []);
+      initGenres(genresData.genres || []);
+      initializeAuthorDropdownListeners();
+      renderSelectedAuthors();
+      loadBooks();
+    })
+    .catch((error) => {
+      console.error(error);
+      Utils.showToast("Ошибка загрузки данных", "error");
+    });
 });
diff --git a/library_service/templates/auth.html b/library_service/templates/auth.html
index 45c8c07..bb46d0a 100644
--- a/library_service/templates/auth.html
+++ b/library_service/templates/auth.html
@@ -184,6 +184,27 @@
                     </p>
                 </div>
 
+                <div class="mb-4">
+                		<cap-widget id="cap"
+                        data-cap-api-endpoint="/api/cap/"
+                        style="
+                            --cap-widget-width: 100%;
+                            --cap-background: #fdfdfd;
+                            --cap-border-color: #d1d5db;
+                            --cap-border-radius: 8px;
+                            --cap-widget-height: auto;
+                            --cap-color: #212121;
+                            --cap-checkbox-size: 32px;
+                            --cap-checkbox-border: 1.5px dashed #d1d5db;
+                            --cap-checkbox-border-radius: 6px;
+                            --cap-checkbox-background: #fafafa;
+                            --cap-checkbox-margin: 2px;
+                            --cap-spinner-color: #4b5563;
+                            --cap-spinner-background-color: #eee;
+                            --cap-spinner-thickness: 5px;"
+                    ></cap-widget>
+                </div>
+
                 <button type="submit" id="register-submit"
                     class="w-full bg-gray-500 text-white py-3 px-4 rounded-lg hover:bg-gray-600 transition duration-200 font-medium disabled:bg-gray-300 disabled:cursor-not-allowed">
                     Зарегистрироваться
@@ -320,5 +341,6 @@
     </div>
 </div>
 {% endblock %} {% block scripts %}
+<script src="https://cdn.jsdelivr.net/npm/@cap.js/widget"></script>
 <script src="/static/page/auth.js"></script>
 {% endblock %}
diff --git a/library_service/templates/books.html b/library_service/templates/books.html
index 7e04eb9..456c040 100644
--- a/library_service/templates/books.html
+++ b/library_service/templates/books.html
@@ -1,5 +1,38 @@
 {% extends "base.html" %} {% block title %}LiB - Книги{% endblock %}
 {% block content %}
+<style>
+.range-double {
+    height: 0;
+    pointer-events: none;
+    appearance: none;
+    -webkit-appearance: none;
+}
+.range-double::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 8px;
+    height: 8px;
+    border-radius: 100%;
+    background: #4b5563;
+    border: 1px solid #ffffff;
+    box-shadow: 0 0 0 1px #4b5563;
+    cursor: pointer;
+    pointer-events: auto;
+}
+.range-double::-moz-range-thumb {
+    width: 8px;
+    height: 8px;
+    border-radius: 100%;
+    background: #4b5563;
+    border: 1px solid #ffffff;
+    box-shadow: 0 0 0 1px #4b5563;
+    cursor: pointer;
+    pointer-events: auto;
+}
+.range-double::-moz-range-track {
+    background: transparent;
+}
+</style>
 <div class="container mx-auto p-4 flex flex-col md:flex-row gap-6">
     <aside class="w-full md:w-1/4">
         <div
@@ -88,6 +121,49 @@
                 </svg>
             </div>
         </div>
+
+        <div
+            x-data="pagesSlider(0, 2000, 10)"
+            class="bg-white p-4 rounded-lg shadow-md mb-6"
+        >
+            <h2 class="text-xl font-bold mb-4">Страниц</h2>
+
+            <div class="flex justify-between text-xs text-gray-500 mb-2">
+                <span>От: <span id="pages-min-value" x-text="minValue"></span></span>
+                <span>До: <span id="pages-max-value" x-text="maxValue"></span></span>
+            </div>
+
+            <div class="relative mt-4 mb-6">
+                <div class="absolute top-1/2 -translate-y-1/2 w-full h-1 bg-gray-200 rounded-full"></div>
+
+                <div
+                    id="pages-range-progress"
+                    class="absolute top-1/2 -translate-y-1/2 h-1 bg-gray-600 rounded-full"
+                    :style="{ left: leftPercent + '%', right: rightPercent + '%' }"
+                ></div>
+
+                <input
+                    id="pages-min"
+                    type="range"
+                    :min="min"
+                    :max="max"
+                    x-model.number="minValue"
+                    @input="onMinInput()"
+                    class="range-double absolute top-0 left-0 w-full bg-transparent appearance-none pointer-events-none"
+                />
+
+                <input
+                    id="pages-max"
+                    type="range"
+                    :min="min"
+                    :max="max"
+                    x-model.number="maxValue"
+                    @input="onMaxInput()"
+                    class="range-double absolute top-0 left-0 w-full bg-transparent appearance-none pointer-events-none"
+                />
+            </div>
+        </div>
+
         <div class="bg-white p-4 rounded-lg shadow-md mb-6">
             <h2 class="text-xl font-bold mb-4">Авторы</h2>
             <div
@@ -192,4 +268,34 @@
 </template>
 {% endblock %} {% block scripts %}
 <script src="/static/page/books.js"></script>
+<script>
+document.addEventListener('alpine:init', () => {
+    Alpine.data('pagesSlider', (min, max, gap) => ({
+        min,
+        max,
+        gap,
+        minValue: min,
+        maxValue: max,
+
+        // проценты для заливки
+        get leftPercent() {
+            return (this.minValue - this.min) * 100 / (this.max - this.min);
+        },
+        get rightPercent() {
+            return 100 - (this.maxValue - this.min) * 100 / (this.max - this.min);
+        },
+
+        onMinInput() {
+            if (this.maxValue - this.minValue < this.gap) {
+                this.minValue = this.maxValue - this.gap;
+            }
+        },
+        onMaxInput() {
+            if (this.maxValue - this.minValue < this.gap) {
+                this.maxValue = this.minValue + this.gap;
+            }
+        }
+    }));
+});
+</script>
 {% endblock %}
diff --git a/main.py b/main.py
deleted file mode 100644
index 9c03940..0000000
--- a/main.py
+++ /dev/null
@@ -1,6 +0,0 @@
-def main():
-    print("Hello from libraryapi!")
-
-
-if __name__ == "__main__":
-    main()
diff --git a/pyproject.toml b/pyproject.toml
index b7ed01c..25ce994 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,8 @@ dependencies = [
     "aiofiles>=25.1.0",
     "qrcode[pil]>=8.2",
     "pyotp>=2.9.0",
+    "slowapi>=0.1.9",
+    "limits>=5.6.0",
 ]
 
 [dependency-groups]
diff --git a/uv.lock b/uv.lock
index d1d14f5..bde6f1c 100644
--- a/uv.lock
+++ b/uv.lock
@@ -278,6 +278,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e8/cb/2da4cc83f5edb9c3257d09e1e7ab7b23f049c7962cae8d842bbef0a9cec9/cryptography-46.0.3-cp38-abi3-win_arm64.whl", hash = "sha256:d89c3468de4cdc4f08a57e214384d0471911a3830fcdaf7a8cc587e42a866372", size = 2918740, upload-time = "2025-10-15T23:18:12.277Z" },
 ]
 
+[[package]]
+name = "deprecated"
+version = "1.3.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "wrapt" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/49/85/12f0a49a7c4ffb70572b6c2ef13c90c88fd190debda93b23f026b25f9634/deprecated-1.3.1.tar.gz", hash = "sha256:b1b50e0ff0c1fddaa5708a2c6b0a6588bb09b892825ab2b214ac9ea9d92a5223", size = 2932523, upload-time = "2025-10-30T08:19:02.757Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/84/d0/205d54408c08b13550c733c4b85429e7ead111c7f0014309637425520a9a/deprecated-1.3.1-py2.py3-none-any.whl", hash = "sha256:597bfef186b6f60181535a29fbe44865ce137a5079f295b479886c82729d5f3f", size = 11298, upload-time = "2025-10-30T08:19:00.758Z" },
+]
+
 [[package]]
 name = "dill"
 version = "0.4.0"
@@ -627,6 +639,7 @@ dependencies = [
     { name = "fastapi", extra = ["all"] },
     { name = "jinja2" },
     { name = "json-log-formatter" },
+    { name = "limits" },
     { name = "passlib", extra = ["argon2"] },
     { name = "psycopg2-binary" },
     { name = "pydantic", extra = ["email"] },
@@ -634,6 +647,7 @@ dependencies = [
     { name = "python-dotenv" },
     { name = "python-jose", extra = ["cryptography"] },
     { name = "qrcode", extra = ["pil"] },
+    { name = "slowapi" },
     { name = "sqlmodel" },
     { name = "toml" },
     { name = "uvicorn", extra = ["standard"] },
@@ -655,6 +669,7 @@ requires-dist = [
     { name = "fastapi", extras = ["all"], specifier = ">=0.115.14" },
     { name = "jinja2", specifier = ">=3.1.6" },
     { name = "json-log-formatter", specifier = ">=1.1.1" },
+    { name = "limits", specifier = ">=5.6.0" },
     { name = "passlib", extras = ["argon2"], specifier = ">=1.7.4" },
     { name = "psycopg2-binary", specifier = ">=2.9.11" },
     { name = "pydantic", extras = ["email"], specifier = ">=2.12.5" },
@@ -662,6 +677,7 @@ requires-dist = [
     { name = "python-dotenv", specifier = ">=0.21.1" },
     { name = "python-jose", extras = ["cryptography"], specifier = ">=3.5.0" },
     { name = "qrcode", extras = ["pil"], specifier = ">=8.2" },
+    { name = "slowapi", specifier = ">=0.1.9" },
     { name = "sqlmodel", specifier = ">=0.0.31" },
     { name = "toml", specifier = ">=0.10.2" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.40.0" },
@@ -676,6 +692,20 @@ dev = [
     { name = "pytest-asyncio", specifier = ">=1.3.0" },
 ]
 
+[[package]]
+name = "limits"
+version = "5.6.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "deprecated" },
+    { name = "packaging" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/bb/e5/c968d43a65128cd54fb685f257aafb90cd5e4e1c67d084a58f0e4cbed557/limits-5.6.0.tar.gz", hash = "sha256:807fac75755e73912e894fdd61e2838de574c5721876a19f7ab454ae1fffb4b5", size = 182984, upload-time = "2025-09-29T17:15:22.689Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/40/96/4fcd44aed47b8fcc457653b12915fcad192cd646510ef3f29fd216f4b0ab/limits-5.6.0-py3-none-any.whl", hash = "sha256:b585c2104274528536a5b68864ec3835602b3c4a802cd6aa0b07419798394021", size = 60604, upload-time = "2025-09-29T17:15:18.419Z" },
+]
+
 [[package]]
 name = "mako"
 version = "1.3.10"
@@ -1451,6 +1481,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b7/ce/149a00dd41f10bc29e5921b496af8b574d8413afcd5e30dfa0ed46c2cc5e/six-1.17.0-py2.py3-none-any.whl", hash = "sha256:4721f391ed90541fddacab5acf947aa0d3dc7d27b2e1e8eda2be8970586c3274", size = 11050, upload-time = "2024-12-04T17:35:26.475Z" },
 ]
 
+[[package]]
+name = "slowapi"
+version = "0.1.9"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "limits" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/a0/99/adfc7f94ca024736f061257d39118e1542bade7a52e86415a4c4ae92d8ff/slowapi-0.1.9.tar.gz", hash = "sha256:639192d0f1ca01b1c6d95bf6c71d794c3a9ee189855337b4821f7f457dddad77", size = 14028, upload-time = "2024-02-05T12:11:52.13Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/2b/bb/f71c4b7d7e7eb3fc1e8c0458a8979b912f40b58002b9fbf37729b8cb464b/slowapi-0.1.9-py3-none-any.whl", hash = "sha256:cfad116cfb84ad9d763ee155c1e5c5cbf00b0d47399a769b227865f5df576e36", size = 14670, upload-time = "2024-02-05T12:11:50.898Z" },
+]
+
 [[package]]
 name = "sqlalchemy"
 version = "2.0.45"
@@ -1796,3 +1838,72 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/9f/3e/28135a24e384493fa804216b79a6a6759a38cc4ff59118787b9fb693df93/websockets-16.0-cp314-cp314t-win_amd64.whl", hash = "sha256:b14dc141ed6d2dde437cddb216004bcac6a1df0935d79656387bd41632ba0bbd", size = 178531, upload-time = "2026-01-10T09:23:35.016Z" },
     { url = "https://files.pythonhosted.org/packages/6f/28/258ebab549c2bf3e64d2b0217b973467394a9cea8c42f70418ca2c5d0d2e/websockets-16.0-py3-none-any.whl", hash = "sha256:1637db62fad1dc833276dded54215f2c7fa46912301a24bd94d45d46a011ceec", size = 171598, upload-time = "2026-01-10T09:23:45.395Z" },
 ]
+
+[[package]]
+name = "wrapt"
+version = "2.0.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/49/2a/6de8a50cb435b7f42c46126cf1a54b2aab81784e74c8595c8e025e8f36d3/wrapt-2.0.1.tar.gz", hash = "sha256:9c9c635e78497cacb81e84f8b11b23e0aacac7a136e73b8e5b2109a1d9fc468f", size = 82040, upload-time = "2025-11-07T00:45:33.312Z" }
+wheels = [
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