Solution

src/App.tsx

@@ -1,7 +1,8 @@
-import { PeoplePage } from './components/PeoplePage';
 import { Navbar } from './components/Navbar';
 
 import './App.scss';
+import { Outlet } from 'react-router-dom';
+import React from 'react';
 
 export const App = () => {
   return (
@@ -10,9 +11,7 @@ export const App = () => {
 
       <div className="section">
         <div className="container">
-          <h1 className="title">Home Page</h1>
-          <h1 className="title">Page not found</h1>
-          <PeoplePage />
+          <Outlet />
         </div>
       </div>
     </div>

src/Root.tsx

@@ -0,0 +1,33 @@
+import {
+  HashRouter as Router,
+  Routes,
+  Route,
+  Navigate,
+} from 'react-router-dom';
+
+import { App } from './App';
+// eslint-disable-next-line import/extensions
+import { PageNotFound } from './page/PageNotFound';
+import { HomePageTitle } from './page/HomePageTitle';
+import { PeoplePage } from './components/PeoplePage';
+import { Routes as AppRoutes } from './enum/routes.enum';
+
+export const Root = () => {
+  return (
+    <Router>
+      <Routes>
+        <Route path={AppRoutes.Home} element={<App />}>
+          <Route path={AppRoutes.PageNotFound} element={<PageNotFound />} />
+
+          <Route index element={<HomePageTitle />} />
+
+          <Route path={AppRoutes.People}>
+            <Route path={AppRoutes.PeopleWithSlug} element={<PeoplePage />} />
+          </Route>
+
+          <Route path={AppRoutes.HomeRedirect} element={<Navigate to={AppRoutes.Home} replace />} />
+        </Route>
+      </Routes>
+    </Router>
+  );
+};

src/components/Navbar.tsx

@@ -1,3 +1,11 @@
+import { NavLink } from 'react-router-dom';
+import cn from 'classnames';
+
+const getNavLinkClass = ({ isActive }: { isActive: boolean }) =>
+  cn('navbar-item', {
+    'has-background-grey-lighter': isActive,
+  });
+
 export const Navbar = () => {
   return (
     <nav
@@ -8,17 +16,13 @@ export const Navbar = () => {
     >
       <div className="container">
         <div className="navbar-brand">
-          <a className="navbar-item" href="#/">
+          <NavLink className={getNavLinkClass} to="/">
             Home
-          </a>
+          </NavLink>
 
-          <a
-            aria-current="page"
-            className="navbar-item has-background-grey-lighter"
-            href="#/people"
-          >
+          <NavLink aria-current="page" className={getNavLinkClass} to="/people">
             People
-          </a>
+          </NavLink>
         </div>
       </div>
     </nav>

src/components/PeopleFilters.tsx

@@ -1,17 +1,93 @@
-export const PeopleFilters = () => {
+import cn from 'classnames';
+
+import { SearchLink } from './SearchLink';
+// eslint-disable-next-line import/extensions
+import { FilterBy } from '../types/FilterBy';
+import { useEffect, useState } from 'react';
+
+type PeopleFilterProps = {
+  searchParams: URLSearchParams;
+  setQuery: React.Dispatch<React.SetStateAction<string>>;
+  setSearchParams: React.Dispatch<React.SetStateAction<URLSearchParams>>;
+  activeQuery: string;
+  toggleCenturies: (currentCentury: number) => string[];
+  activeCenturies: string[];
+};
+
+export const PeopleFilters = ({
+  toggleCenturies,
+  searchParams,
+  setQuery,
+  activeQuery,
+  setSearchParams,
+  activeCenturies,
+}: PeopleFilterProps) => {
+  const [activeFilter, setActiveFilter] = useState('');
+  const centuryList = [16, 17, 18, 19, 20];
+
+  useEffect(() => {
+    setActiveFilter(searchParams.get('sex') || '');
+    setQuery(searchParams.get('query') || '');
+  }, [searchParams, setQuery]);
+
+  const handleQueryChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    const newSearchParams = new URLSearchParams(searchParams);
+
+    if (!event.target.value) {
+      newSearchParams.delete('query');
+    } else {
+      newSearchParams.set('query', event.target.value);
+    }
+
+    setSearchParams(newSearchParams);
+  };
+
+  const resetAllFilters = () => {
+    setQuery('');
+    setActiveFilter('');
+    setSearchParams(new URLSearchParams());
+  };
+
   return (
     <nav className="panel">
       <p className="panel-heading">Filters</p>
 
       <p className="panel-tabs" data-cy="SexFilter">
-        <a className="is-active" href="#/people">
-          All
+        <a
+          className={cn({ 'is-active': activeFilter === '' })}
+          href="#"
+          onClick={e => {
+            e.preventDefault();
+            const newSearchParams = new URLSearchParams(searchParams);
+            newSearchParams.delete('sex');
+            setSearchParams(newSearchParams);
+          }}
+        >
+          {FilterBy.All}
         </a>
-        <a className="" href="#/people?sex=m">
-          Male
+        <a
+          className={cn({ 'is-active': activeFilter === 'm' })}
+          href="#"
+          onClick={e => {
+            e.preventDefault();
+            const newSearchParams = new URLSearchParams(searchParams);
+            newSearchParams.set('sex', 'm');
+            setSearchParams(newSearchParams);
+          }}
+        >
+          {FilterBy.Male}
         </a>
-        <a className="" href="#/people?sex=f">
-          Female
+        <a
+          className={cn({ 'is-active': activeFilter === 'f' })}
+          href="#"
+          onClick={e => {
+            e.preventDefault();
+            const newSearchParams = new URLSearchParams(searchParams);
+            newSearchParams.set('sex', 'f');
+            setSearchParams(newSearchParams);
+          }}
+        >
+          {FilterBy.Female}
         </a>
       </p>
 
@@ -22,6 +98,8 @@ export const PeopleFilters = () => {
             type="search"
             className="input"
             placeholder="Search"
+            value={activeQuery}
+            onChange={handleQueryChange}
           />
 
           <span className="icon is-left">
@@ -33,51 +111,26 @@ export const PeopleFilters = () => {
       <div className="panel-block">
         <div className="level is-flex-grow-1 is-mobile" data-cy="CenturyFilter">
           <div className="level-left">
-            <a
-              data-cy="century"
-              className="button mr-1"
-              href="#/people?centuries=16"
-            >
-              16
-            </a>
-
-            <a
-              data-cy="century"
-              className="button mr-1 is-info"
-              href="#/people?centuries=17"
-            >
-              17
-            </a>
-
-            <a
-              data-cy="century"
-              className="button mr-1 is-info"
-              href="#/people?centuries=18"
-            >
-              18
-            </a>
-
-            <a
-              data-cy="century"
-              className="button mr-1 is-info"
-              href="#/people?centuries=19"
-            >
-              19
-            </a>
-
-            <a
-              data-cy="century"
-              className="button mr-1"
-              href="#/people?centuries=20"
-            >
-              20
-            </a>
+            {centuryList.map((century, index) => (
+              <SearchLink
+                key={index}
+                data-cy="century"
+                className={cn('button mr-1', {
+                  'is-info': activeCenturies.includes(String(century)),
+                })}
+                params={{ centuries: toggleCenturies(century) }}
+              >
+                {century}
+              </SearchLink>
+            ))}
           </div>
 
           <div className="level-right ml-4">
             <a
               data-cy="centuryALL"
-              className="button is-success is-outlined"
+              className={cn('button is-success ', {
+                'is-outlined': !!activeCenturies.length,
+              })}
               href="#/people"
             >
               All
@@ -87,7 +140,11 @@ export const PeopleFilters = () => {
       </div>
 
       <div className="panel-block">
-        <a className="button is-link is-outlined is-fullwidth" href="#/people">
+        <a
+          className="button is-link is-outlined is-fullwidth"
+          href="#/people"
+          onClick={resetAllFilters}
+        >
           Reset all filters
         </a>
       </div>