first solution

src/App.tsx

@@ -1,20 +1,17 @@
-import { PeoplePage } from './components/PeoplePage';
-import { Navbar } from './components/Navbar';
-
+import { Outlet } from 'react-router-dom';
 import './App.scss';
 
+import { Navbar } from './components/Navbar';
+
 export const App = () => {
   return (
     <div data-cy="app">
       <Navbar />
-
-      <div className="section">
+      <main className="section">
         <div className="container">
-          <h1 className="title">Home Page</h1>
-          <h1 className="title">Page not found</h1>
-          <PeoplePage />
+          <Outlet />
         </div>
-      </div>
+      </main>
     </div>
   );
 };

src/components/Navbar.tsx

@@ -1,4 +1,13 @@
-export const Navbar = () => {
+import React from 'react';
+import { NavLink } from 'react-router-dom';
+import cn from 'classnames';
+
+export const Navbar: React.FC = () => {
+  const isActiveClass = ({ isActive }: { isActive: boolean }) => cn(
+    'navbar-item',
+    { 'has-background-grey-lighter': isActive },
+  );
+
   return (
     <nav
       data-cy="nav"
@@ -8,15 +17,19 @@ export const Navbar = () => {
     >
       <div className="container">
         <div className="navbar-brand">
-          <a className="navbar-item" href="#/">Home</a>
+          <NavLink
+            to="/"
+            className={isActiveClass}
+          >
+            Home
+          </NavLink>
 
-          <a
-            aria-current="page"
-            className="navbar-item has-background-grey-lighter"
-            href="#/people"
+          <NavLink
+            to="/people"
+            className={isActiveClass}
           >
             People
-          </a>
+          </NavLink>
         </div>
       </div>
     </nav>

src/components/PeopleFilters.tsx

@@ -1,12 +1,61 @@
-export const PeopleFilters = () => {
+import React, { ChangeEvent } from 'react';
+import classNames from 'classnames';
+import { useSearchParams } from 'react-router-dom';
+
+import { SearchLink } from './SearchLink';
+import { getSearchWith } from '../utils/searchHelper';
+
+const centuries = [16, 17, 18, 19, 20];
+
+export const PeopleFilters: React.FC = () => {
+  const [searchParams, setSearchParams] = useSearchParams();
+
+  const params = {
+    query: searchParams.get('query') || '',
+    centuries: searchParams.getAll('century'),
+    sex: searchParams.get('sex'),
+  };
+
+  const handleQueryChange = (event: ChangeEvent<HTMLInputElement>) => {
+    const { value } = event.target;
+
+    setSearchParams(getSearchWith(searchParams, { query: value || null }));
+  };
+
+  const renderSexFilter = (sex: string | null, label: string) => (
+    <SearchLink
+      className={classNames({ 'is-active': params.sex === sex })}
+      params={{ sex }}
+    >
+      {label}
+    </SearchLink>
+  );
+
+  const renderCenturyFilter = (century: number) => (
+    <SearchLink
+      key={century}
+      className={classNames('button mr-1', {
+        'is-info': params.centuries.includes(century.toString()),
+      })}
+      params={{
+        century: params.centuries.includes(century.toString())
+          ? params.centuries.filter((paramsCentury) => century.toString()
+          !== paramsCentury)
+          : [...params.centuries, century.toString()],
+      }}
+    >
+      {century}
+    </SearchLink>
+  );
+
   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>
-        <a className="" href="#/people?sex=m">Male</a>
-        <a className="" href="#/people?sex=f">Female</a>
+        {renderSexFilter(null, 'All')}
+        {renderSexFilter('m', 'Male')}
+        {renderSexFilter('f', 'Female')}
       </p>
 
       <div className="panel-block">
@@ -16,8 +65,9 @@ export const PeopleFilters = () => {
             type="search"
             className="input"
             placeholder="Search"
+            value={params.query}
+            onChange={handleQueryChange}
           />
-
           <span className="icon is-left">
             <i className="fas fa-search" aria-hidden="true" />
           </span>
@@ -26,67 +76,28 @@ 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>
-          </div>
-
+          <div className="level-left">{centuries.map(renderCenturyFilter)}</div>
           <div className="level-right ml-4">
-            <a
+            <SearchLink
               data-cy="centuryALL"
-              className="button is-success is-outlined"
-              href="#/people"
+              className={classNames('button is-success', {
+                'is-outlined': params.centuries.length !== 0,
+              })}
+              params={{ century: null }}
             >
               All
-            </a>
+            </SearchLink>
           </div>
         </div>
       </div>
 
       <div className="panel-block">
-        <a
+        <SearchLink
           className="button is-link is-outlined is-fullwidth"
-          href="#/people"
+          params={{ century: null, sex: null, query: null }}
         >
           Reset all filters
-        </a>
+        </SearchLink>
       </div>
     </nav>
   );